CN116376159B - Carbon fiber reinforced polypropylene composite material, preparation method, parts and automobiles - Google Patents

Carbon fiber reinforced polypropylene composite material, preparation method, parts and automobiles

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Publication number
CN116376159B
CN116376159B CN202310367175.5A CN202310367175A CN116376159B CN 116376159 B CN116376159 B CN 116376159B CN 202310367175 A CN202310367175 A CN 202310367175A CN 116376159 B CN116376159 B CN 116376159B
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Prior art keywords
carbon fiber
sizing agent
composite material
fiber reinforced
reinforced polypropylene
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CN116376159A (en
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蒋宝林
杨冰
黄锦腾
肖洁
陈琛
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Guangdong Huitian Aerospace Technology Co Ltd
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Guangdong Huitian Aerospace Technology Co Ltd
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Priority to CN202310367175.5A priority Critical patent/CN116376159B/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/10—Doors arranged at the vehicle rear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/06—Elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/08—Ingredients agglomerated by treatment with a binding agent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Transportation (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

本申请涉及一种碳纤维增强聚丙烯复合材料及制备方法。按质量百分比计，碳纤维增强聚丙烯复合材料包括：45％‑70％高结晶聚丙烯、15％‑30％经上浆剂处理后的回收碳纤维，以及相容剂。制备方法包括：采用上浆剂对回收碳纤维进行处理，得到经上浆剂处理后的回收碳纤维；将高结晶聚丙烯和相容剂从生产设备的主料口加入，将经上浆剂处理后的回收碳纤维从生产设备的侧料口加入；通过生产设备对加入的材料进行熔融共混后挤出造粒，得到碳纤维增强聚丙烯复合材料。本申请提供的方案，能够满足汽车零部件高强度高模量的轻量化设计需求。

The present application relates to a carbon fiber reinforced polypropylene composite material and a preparation method. In terms of mass percentage, the carbon fiber reinforced polypropylene composite material includes: 45%-70% high crystalline polypropylene, 15%-30% recycled carbon fiber treated with a sizing agent, and a compatibilizer. The preparation method includes: treating the recycled carbon fiber with a sizing agent to obtain recycled carbon fiber treated with a sizing agent; adding high crystalline polypropylene and a compatibilizer from the main feed port of the production equipment, and adding the recycled carbon fiber treated with a sizing agent from the side feed port of the production equipment; and melt blending the added materials through the production equipment and then extruding and granulating them to obtain a carbon fiber reinforced polypropylene composite material. The solution provided in the present application can meet the lightweight design requirements of high strength and high modulus of automotive parts.

Description

Carbon fiber reinforced polypropylene composite material, preparation method, parts and automobiles
Technical Field
The application relates to the technical field of composite material processing, in particular to a carbon fiber reinforced polypropylene composite material and a preparation method thereof.
Background
Lightweight design is one of the key technical directions of the automobile industry. The automobile can realize energy conservation, emission reduction and fuel emission reduction through the light weight of zero parts and the weight reduction design of the whole automobile. Therefore, the lightweight design at the present stage is supported more in the automobile industry, wherein the whole automobile material is developed towards low density, high strength and high performance.
Taking the front end frame of the automobile as an example, the front end frame is an important frame structure of the front end of the automobile, parts such as a radiator, a headlight, a hair cover lock, an anti-collision beam and the like can be integrally installed, the front end frame of the automobile in early stage is a metal part, the weight is high, the integration level is low, the assembly beat is slow, the front end frame is gradually replaced by a front end frame of full plastic or plastic plus metal insert in recent years, the plastic front end frame can be integrally designed, the number of parts is reduced, the production cost of the parts is reduced, and meanwhile, the weight reduction effect is obvious.
In the related art, a carbon fiber reinforced polypropylene composite material is disclosed, but the tensile strength of the obtained material is lower than 80MPa, the flexural modulus is lower than 3000MPa, and compared with the material used for the traditional automobile parts, the material has no performance advantage, so that the lightweight design requirement of the automobile parts for high strength and high modulus cannot be met.
Disclosure of Invention
In order to solve or partially solve the problems in the related art, the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof, which can meet the light-weight design requirement of high strength and high modulus of automobile parts.
The application provides a carbon fiber reinforced polypropylene composite material, which comprises, by mass, 45% -70% of high-crystalline polypropylene, 15% -30% of recycled carbon fibers treated by a sizing agent, and a compatilizer.
As an optional embodiment, the carbon fiber reinforced polypropylene composite material comprises 50% -70% of high crystalline polypropylene, 20% -30% of recovered carbon fiber, 10% -15% of compatilizer, 3% -5% of sizing agent and the balance of other auxiliary agents, wherein the sizing agent accounts for 3% -5% of the mass of the recovered carbon fiber treated by the sizing agent.
As an alternative embodiment:
The other auxiliary agents at least comprise an antioxidant, a coupling agent, a nucleating agent, a lubricant and a weather-resistant agent;
The antioxidant accounts for 0.1-0.3% of the carbon fiber reinforced polypropylene composite material in percentage by mass, and the coupling agent accounts for 0.3-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass. The nucleating agent accounts for 0.2-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass, the lubricant accounts for 0.5-1% of the carbon fiber reinforced polypropylene composite material in percentage by mass, and the weather-proof agent accounts for 0.3-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass.
As an alternative example, the high crystalline polypropylene has a melt flow rate of 15-20g/10min, and/or,
The tensile strength of the recycled carbon fiber selected by the recycled carbon fiber treated by the sizing agent is more than or equal to 4500MPa, and the tensile modulus is more than or equal to 260Gpa.
As an alternative embodiment, the sizing agent includes at least one of epoxy resin, polyamide resin, polyurethane resin, phenolic resin, vinyl ester resin, polyolefin-based resin.
As an alternative embodiment, the recycled carbon fiber selected from the recycled carbon fiber treated with sizing agent is recycled chopped carbon fiber, the recycled chopped carbon fiber has a length of 5mm to 6mm, and/or,
The crystallinity of the high crystalline polypropylene is 65% -75%.
As an alternative embodiment, the sizing agent comprises a latent crosslinker comprising isocyanate-NCO groups.
As an alternative embodiment, the latent cross-linking agent comprises 2% -5% by mass of the sizing agent.
As an alternative embodiment, the compatibilizer includes one or both of maleic anhydride grafted polypropylene and acrylic acid grafted polypropylene.
As an alternative example, the maleic anhydride grafting polypropylene has a maleic anhydride grafting ratio of 1.2 to 1.5%, and/or,
The grafting rate of the acrylic acid in the acrylic acid grafted polypropylene is 1.2-1.5%.
The second aspect of the present application provides a method for preparing the carbon fiber reinforced polypropylene composite material, which comprises the following steps:
treating the recovered carbon fiber by adopting the sizing agent to obtain the recovered carbon fiber treated by the sizing agent;
Adding the high-crystalline polypropylene and the compatilizer from a main material port of production equipment, and adding the recycled carbon fiber treated by the sizing agent from a side material port of the production equipment;
And (3) carrying out melt blending on the added materials through the production equipment, and then extruding and granulating to obtain the carbon fiber reinforced polypropylene composite material.
As an alternative embodiment, the screw speed of the production device is 100rpm-200rpm.
The third aspect of the application provides an automobile part, which is prepared from the carbon fiber reinforced polypropylene composite material.
According to a fourth aspect of the application, there is provided an automobile comprising the automobile component described above.
The technical scheme provided by the application has the beneficial effects that the high-crystallization polypropylene is used as a base material, the recycled carbon fiber treated by the sizing agent is used as a reinforcing material, and the compatibility of the high-crystallization polypropylene and the recycled carbon fiber is improved by the compatilizer, so that the bonding capability of the carbon fiber and the polypropylene matrix resin is greatly improved, and the prepared carbon fiber reinforced polypropylene composite material with low cost and high modulus can be suitable for the lightweight design of automobile parts. Compared with the existing automobile parts, the material has ultrahigh strength and modulus, and parts can be thinned under the same strength and rigidity requirements.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
Fig. 1 is a schematic flow chart of a method for preparing a carbon fiber reinforced polypropylene composite material according to an embodiment of the present application.
Detailed Description
Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While embodiments of the present application are illustrated in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the related technology, a carbon fiber reinforced polypropylene composite material and a manufacturing method are disclosed, but the obtained material has tensile strength lower than 80MPa and flexural modulus lower than 3000MPa, and compared with the materials of the traditional automobile parts, the material has no performance advantage, so that the light-weight design requirement of the automobile parts for high strength and high modulus cannot be met.
Aiming at the problems, the embodiment of the application provides a carbon fiber reinforced polypropylene composite material which can meet the light-weight design requirement of high strength and high modulus of automobile parts.
The embodiment of the application provides a carbon fiber reinforced polypropylene composite material, which comprises, by mass, 45% -70% of high-crystalline polypropylene, 15% -30% of recycled carbon fibers treated by a sizing agent, and a compatilizer.
Compared with common polypropylene, the high-crystallization polypropylene HCPP provided by the embodiment of the application has the advantages of high rigidity, high strength, high heat distortion temperature, good impact resistance balance, and capability of being rapidly injection molded, and is a special resin with high performance. Therefore, the high-crystallization polypropylene HCPP is used as the reinforced or filled polypropylene modified base resin, so that the performance of the product can reach a higher level, and a thin-wall lightweight product can be obtained when a large-sized automobile product is prepared.
On one hand, the cost of the recycled carbon fiber reinforced polypropylene treated by the sizing agent is reduced by 50% compared with the cost of the non-recycled carbon fiber reinforced polypropylene, and the method provides high competitiveness for industrialized application of materials. On the other hand, the content of the recycled carbon fiber in the embodiment of the application is 15-30%. When the content of the recycled carbon fiber is too low, the strength and rigidity of the prepared composite material are insufficient, the tensile strength is less than or equal to 75MPa, and the tensile modulus is less than or equal to 7000MPa, and when the content of the recycled carbon fiber is too high, the tensile strength and tensile modulus of the prepared composite material can be improved again, but the thickness of a part cannot be reduced due to the problem of molding of large-size plastic parts, so that the performance is excessive due to the higher content, and the material cost is obviously increased due to the increase of the content of the recycled carbon fiber.
In addition, because the interfacial adhesion of polypropylene and carbon fiber is poor, the surface of the recovered carbon fiber can be treated by adopting the sizing agent to obtain the recovered carbon fiber treated by the sizing agent, and the latent cross-linking agent contained in the sizing agent can enable the carbon fiber and the polypropylene to form a cross-linked structure at the interface, so that the interface performance of the carbon fiber and the polypropylene is improved, and the bonding performance of the carbon fiber and the polypropylene matrix resin is improved.
The compatilizer provided by the embodiment of the application can ensure that the compatibility of the composite material is good, the carbon fibers are fully dispersed, and the mechanical property of the composite material is greatly improved.
According to the embodiment of the application, the high-crystalline polypropylene is used as a base material, the recycled carbon fiber treated by the sizing agent is used as a reinforcing material, and the compatibility of the high-crystalline polypropylene and the recycled carbon fiber treated by the sizing agent is improved by the compatilizer, so that the bonding capability of the carbon fiber and the polypropylene matrix resin is greatly improved, and the prepared carbon fiber reinforced polypropylene composite material with low cost and high modulus can be suitable for lightweight design of automobile parts. Compared with the existing automobile parts, the material has ultrahigh strength and modulus, and parts can be thinned under the same strength and rigidity requirements.
As an alternative embodiment, the carbon fiber reinforced polypropylene composite material comprises, by mass, 50% -70% of high crystalline polypropylene, 20% -30% of recovered carbon fibers treated with sizing agent, 10% -15% of compatilizer, and the balance of other additives, wherein the sizing agent accounts for 3% -5% of the recovered carbon fibers treated with the sizing agent.
When the content of the compatibilizer is less than 10%, the affinity between the recycled carbon fiber treated with the sizing agent and the polypropylene and the dispersibility of the recycled carbon fiber treated with the sizing agent cannot be sufficiently improved, and when the content of the compatibilizer is more than 15%, the molecular weight of the compatibilizer is relatively low, and when the content is too much, the overall mechanical properties of the composite material are reduced.
When the content of the sizing agent is less than 3%, the combination property of the recovered carbon fiber treated by the sizing agent and the high-crystalline polypropylene is reduced, and the filament lifting phenomenon is easy to occur in the processing process of the recovered carbon fiber, so that the obtained recovered carbon fiber treated by the sizing agent has excessively high filament quantity, poor bundling property and poor wear resistance, and when the content of the sizing agent is more than 5%, the problems of poor fiber opening of the carbon fiber and increased production cost can be caused.
As an alternative embodiment, the melt flow rate of the high crystalline polypropylene is 15-20g/10min.
The high crystalline polypropylene HCPP selected in the examples of the present application had a melt mass flow rate MFR in the range of 15-20g/10min at a test temperature of 230℃and a nominal load of 2.16 kg. When the melt mass flow rate of the high-crystalline polypropylene is lower than 15g/10min, the design requirement of the front end frame for light weight structure cannot be met. Through simulation analysis, the thickness of the prepared carbon fiber reinforced polypropylene composite material is thinned, so that the melt mass flow rate of the material is lower than 15g/10min, and the analyzed material cannot fill the molding requirement of a complex structural area of a large-sized part of an automobile or a gate area far away from the large-sized part. When the melt mass flow rate of the high-crystalline polypropylene is higher than 20g/10min, the flexural modulus and the tensile modulus of the prepared carbon fiber reinforced polypropylene composite material are both reduced to a considerable extent.
As an alternative embodiment, the tensile strength of the recycled carbon fiber selected from recycled carbon fibers treated by the sizing agent is more than or equal to 4500MPa, and the tensile modulus is more than or equal to 260Gpa.
The volume density of the recycled carbon fiber selected in the embodiment of the application is 400g/L-420g/L, the tensile strength is more than or equal to 4500MPa, the tensile modulus is more than or equal to 260GPa, the recycled carbon fiber has the characteristic of high strength and high modulus, and the recycled carbon fiber treated by the sizing agent obtained by the sizing agent also has the characteristic of high strength and high modulus.
Preferably, the carbon fiber reinforced polypropylene composite material comprises 50% -70% of high-crystalline polypropylene, 20% -30% of recovered carbon fibers treated by a sizing agent, 10% -15% of compatilizer and the balance of other additives, wherein the sizing agent accounts for 3% -5% of the mass of the recovered carbon fibers treated by the sizing agent, the melt flow rate of the high-crystalline polypropylene is 15-20g/10min, the tensile strength of the recovered carbon fibers selected by the recovered carbon fibers treated by the sizing agent is more than or equal to 4500MPa, the tensile modulus is more than or equal to 260GPa, and the sizing agent comprises a latent cross-linking agent.
The tensile strength of the carbon fiber reinforced polypropylene composite material is more than or equal to 95MPa, the tensile modulus is more than or equal to 10500MPa, the bending strength is more than or equal to 140MPa, and the bending modulus is more than or equal to 9500MPa.
As an alternative embodiment, the sizing agent includes at least one of epoxy resin, polyamide resin, polyurethane resin, phenolic resin, vinyl ester resin, polyolefin-based resin.
In the embodiment of the application, the polyolefin resin is used as the sizing agent, so that the recycled carbon fiber treated by the sizing agent is compounded with the high-crystalline polypropylene. In addition, the impregnation method is preferable in the embodiment of the present application to sufficiently combine the sizing agent with the recycled carbon fiber.
As an alternative embodiment, the recycled carbon fibers treated by the sizing agent are selected from recycled chopped carbon fibers, and the length of the recycled chopped carbon fibers is 5mm-6mm.
The recovered carbon fibers treated by the sizing agent have the length of 5mm-6mm and the shape of rice grains, so that the recovered chopped carbon fibers are convenient to discharge and disperse in the granulating process.
As an alternative embodiment, the crystallinity of the high crystalline polypropylene is 65% to 75%.
The crystallinity of the high-crystalline polypropylene HCPP adopted in the embodiment of the application can be 65% -75%, the isotacticity is more than or equal to 98%, the tensile strength is more than or equal to 35Mpa, the tensile modulus is more than or equal to 2000Mpa, the flexural modulus is more than or equal to 2200Mpa, the heat distortion temperature is more than or equal to 130 ℃, and the tensile strength, the tensile modulus and the like of the high-crystalline polypropylene are far higher than those of the conventional common homo-or copolymerization polypropylene material, so that the high-crystalline polypropylene can be used as the reinforced or filled polypropylene modified base resin to enable the performance of the product to reach a higher level, and the thin-wall lightweight product can be obtained when the large-sized automobile product is prepared.
As an alternative example, the sizing agent comprises a latent crosslinker comprising isocyanate-NCO groups.
The latent cross-linking agent provided by the embodiment of the application has a specific isocyanate-NCO group, and under the molten state of high-crystalline polypropylene, the-NCO functional group can abstract active hydrogen in the carbon fiber and the polypropylene resin to form a cross-linking structure at the interface of the carbon fiber and the polypropylene, so that the interface performance of the carbon fiber and the polypropylene can be improved, and the bonding performance of the carbon fiber and the polypropylene can be improved.
Preferably, the embodiment of the application provides a chemical structural formula of a latent cross-linking agent A-NCO (A is an aliphatic closed end):
as a preferred embodiment, the latent cross-linking agent comprises 2-5% by mass of the sizing agent.
Preferably, the latent cross-linking agent accounts for 3% of the sizing agent by mass.
When the content of the latent cross-linking agent is too low, the interfacial properties of the carbon fiber and the polypropylene cannot be improved well, and when the content of the latent cross-linking agent is too high, the dispersibility of the latent cross-linking agent in the sizing agent is poor.
As an alternative embodiment, the compatibilizer comprises one or both of maleic anhydride grafted polypropylene and acrylic acid grafted polypropylene. The grafting rate of the maleic anhydride in the maleic anhydride grafted polypropylene is 1.2-1.5%. The grafting rate of the acrylic acid in the acrylic acid grafted polypropylene is 1.2-1.5%.
The polypropylene material with low grafting rate has more residues of maleic anhydride or acrylic acid, and more byproducts, so that the odor and the VOC (volatile organic compound) performance are poor, and the automobile use requirement cannot be met.
As an optional embodiment, the other auxiliary agents at least comprise an antioxidant, a coupling agent, a nucleating agent, a lubricant and a weather-resistant agent, wherein the antioxidant accounts for 0.1-0.3% of the carbon fiber reinforced polypropylene composite material in percentage by mass, the coupling agent accounts for 0.3-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass, the nucleating agent accounts for 0.2-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass, the lubricant accounts for 0.5-1% of the carbon fiber reinforced polypropylene composite material in percentage by mass, and the weather-resistant agent accounts for 0.3-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass.
The coupling agent can further increase the adhesion of the polypropylene and the carbon fiber, and improve the mechanical tensile strength, the bending strength, the tensile modulus, the bending modulus and the like of the composite material. The coupling agent comprises at least one of a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent.
Corresponding to the embodiment of the application function realization method, the application also provides a preparation method of the carbon fiber reinforced polypropylene composite material and a corresponding embodiment.
Fig. 1 is a schematic flow chart of a method for preparing a carbon fiber reinforced polypropylene composite material according to an embodiment of the present application.
Referring to fig. 1, the preparation method of the carbon fiber reinforced polypropylene composite material according to the embodiment of the application comprises the following steps:
And S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And (3) carrying out impregnation treatment on the recovered carbon fiber by adopting the sizing agent according to the mass ratio of the sizing agent accounting for 3-5% of the mass of the recovered carbon fiber treated by the sizing agent.
And S2, adding the high-crystalline polypropylene and the compatilizer from a main material port of production equipment, and adding the recycled carbon fiber treated by the sizing agent from a side material port of the production equipment.
The production equipment of the embodiment of the application can be a double-screw extruder.
And S3, carrying out melt blending on the added materials through production equipment, and then extruding and granulating to obtain the carbon fiber reinforced polypropylene composite material.
According to the mass ratio of 45% -70% of high-crystalline polypropylene, 15% -30% of recovered carbon fiber and compatilizer, adding the high-crystalline polypropylene and the compatilizer from a main material port of a double-screw extruder, adding the recovered carbon fiber treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 185-195 ℃, 205-215 ℃, 215-220 ℃, 225-230 ℃ and 225-230 ℃ of a head of the double-screw extruder, and finally carrying out melt blending by the double-screw extruder and extruding granulation to obtain the carbon fiber reinforced polypropylene composite material.
According to the embodiment of the application, the high-crystalline polypropylene is used as a base material, the recycled carbon fiber treated by the sizing agent is used as a reinforcing material, the compatibility of the high-crystalline polypropylene and the recycled carbon fiber treated by the sizing agent is improved by the compatilizer, the combination capability of the carbon fiber and the polypropylene matrix resin is greatly improved, and the composite material is prepared by extrusion granulation after melt blending by a double-screw extruder, so that the low-cost high-modulus carbon fiber reinforced polypropylene composite material can be suitable for lightweight design of automobile parts. Compared with the existing automobile parts, the material has ultrahigh strength and modulus, and parts can be thinned under the same strength and rigidity requirements.
Preferably, according to the mass percentage, the embodiment of the application prepares the carbon fiber reinforced polypropylene composite material with the density of 1.0-1.06g/m 3, the tensile strength of more than or equal to 95Mpa, the tensile modulus of more than or equal to 10500Mpa, the bending strength of more than or equal to 140Mpa, the bending modulus of more than or equal to 9500Mpa, the load heat distortion temperature of more than or equal to 150 ℃, benzene of less than or equal to 30 mug/m 3, toluene of less than or equal to 60 mug/m 3, ethylbenzene of less than or equal to 50 mug/m 3, xylene of less than or equal to 60 mug/m 3, styrene of less than or equal to 50 mug/m 3, formaldehyde of less than or equal to 50 mug/m 3, formaldehyde of less than or equal to 100 mug/m 3 and acrolein of less than or equal to 20 mug/m 3 according to the mass percentage of 50% -70% of high-crystalline polypropylene, 20% -30% of the recovered carbon fiber treated by sizing agent, 10% -15% of compatilizer and the balance of other auxiliary agents.
As an alternative embodiment, the screw speed of the production equipment is 100rpm-200rpm.
When the content of the recovered carbon fiber treated by the sizing agent is 20% -30%, the retention length of the carbon fiber after extrusion granulation is 1500-2000 mu m on average. The retention length of 70% -80% of carbon fibers is less than 2000 mu m, the retention length of 10% -15% of carbon fibers is less than 1500 mu m, and the retention length of 10% -25% of carbon fibers is more than 2000 mu m. At carbon fiber contents above 30%, fiber-to-fiber interactions increase, causing more breakage, resulting in a decrease in the average length of the fibers in the system. In addition, the higher the melt flow rate, the less resistance the carbon fibers experience in the polypropylene resin matrix when sheared by the twin screws, resulting in longer carbon fiber retention lengths. When the rotating speed of the screw is controlled to be 100rpm-200rpm and is less than 100rpm, the mixing effect of the polypropylene resin, the carbon fiber and the additive is poor, and when the rotating speed of the screw is higher than 200rpm, the shearing force is increased, so that the retention length of the carbon fiber is reduced, and the modulus of the composite material is reduced.
In order to further understand the present application, the carbon fiber reinforced polypropylene composite material and the preparation method thereof provided by the present application are described below with reference to examples, and the scope of the present application is not limited by the following examples.
Example 1:
the embodiment 1 of the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 68% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Example 2:
The embodiment 2 of the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof. The mass ratio of the carbon fiber reinforced polypropylene composite material is different from that of example 1.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 63% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 15% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises the following steps:
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Example 3:
The embodiment 3 of the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof. Unlike example 1, a polypropylene of higher crystallinity was employed.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 68% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has a crystallinity of 72%, a melt mass flow rate MFR of 18g/10min, a tensile strength of recovered carbon fiber of not less than 4500Mpa, a tensile modulus of not less than 260GPa, a sizing agent comprising a latent cross-linking agent accounting for 3% of the mass of the sizing agent, and a compatibility agent selected from maleic anhydride grafted polypropylene, wherein the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder according to mass ratio, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions respectively, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Example 4:
The embodiment 4 of the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof. The mass ratio of the carbon fiber reinforced polypropylene composite material is different from that of example 1.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 58% of high-crystalline polypropylene, 25% of recovered carbon fibers treated by a sizing agent, 15% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder according to mass ratio, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions respectively, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Example 5:
The embodiment 5 of the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof. Unlike example 1, the mass ratio of the carbon fiber reinforced polypropylene composite material was determined.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 53% of high-crystalline polypropylene, 30% of recovered carbon fibers treated by a sizing agent, 15% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recycled chopped carbon fibers by adopting a sizing agent according to the mass ratio.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder according to mass ratio, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions respectively, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Example 6:
The embodiment 6 of the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof. The mass ratio of the carbon fiber reinforced polypropylene composite material is different from that of example 1.
The carbon fiber reinforced polypropylene composite material comprises 58% of high-crystalline polypropylene, 30% of recovered carbon fiber treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent according to mass percentage. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has a crystallinity of 72%, a melt mass flow rate MFR of 18g/10min, a tensile strength of recovered carbon fiber of not less than 4500Mpa, a tensile modulus of not less than 260GPa, a sizing agent comprising a latent cross-linking agent accounting for 3% of the mass of the sizing agent, and a compatibility agent selected from maleic anhydride grafted polypropylene, wherein the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 1:
the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 1. Unlike example 1, the polypropylene resin used was a conventional low crystallinity polypropylene.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 68% of conventional polypropylene, 20% of recovered carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The crystallinity of the conventional polypropylene is 45%, the melt mass flow rate MFR is 18g/10min, the tensile strength of the recovered carbon fiber is more than or equal to 4500Mpa, the tensile modulus is more than or equal to 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder according to mass ratio, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions respectively, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 2:
The application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 2. Unlike example 1, the sizing agent used does not contain a latent crosslinking agent having-NCO-characteristic groups.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 68% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, sizing agent containing no latent cross-linking agent, and compatibilizer selected from medium maleic anhydride grafted polypropylene, wherein the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 3:
the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 3. Unlike example 1, the high crystalline polypropylene employed was higher in content and less compatibilizer.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 72% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 6% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 4:
the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 4. Unlike example 1, the high crystalline polypropylene employed was higher in content and less in recovered carbon fiber.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 72% of high-crystalline polypropylene, 16% of recycled carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder according to mass ratio, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions respectively, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 5:
the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 5. Unlike example 1, the strength of the recycled carbon fiber is not high-strength high-modulus carbon fiber.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 68% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber tensile strength of 3500Mpa and tensile modulus of 200GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from medium maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 6:
The application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 6. Unlike example 1, the content of the high crystalline polypropylene was reduced and the content of the compatibilizer was increased.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 60% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 18% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder according to mass ratio, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions respectively, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 7:
the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 7. Unlike example 1, the grafting ratio of maleic anhydride in the compatibilizer is lower.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 68% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 0.8%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 8:
the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 8. Unlike example 1, a high screw speed was used during granulation.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 68% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 18g/10min, recovered carbon fiber has tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, the sizing agent comprises a latent cross-linking agent, the latent cross-linking agent accounts for 3% of the mass of the sizing agent, the compatilizer is selected from maleic anhydride grafted polypropylene, and the grafting rate of maleic anhydride is 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and setting the rotating speed of a screw to be 300rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
Comparative example 9:
the application provides a carbon fiber reinforced polypropylene composite material and a preparation method thereof in comparative example 9. Unlike example 1, the melt mass flow rate of the high-precision polypropylene employed was higher.
The carbon fiber reinforced polypropylene composite material comprises, by mass, 68% of high-crystalline polypropylene, 20% of recycled carbon fibers treated by a sizing agent, 10% of a compatilizer, 0.3% of a coupling agent, 0.2% of an antioxidant, 0.5% of a nucleating agent, 0.5% of a lubricant and 0.5% of a weather resistant agent. Wherein, the sizing agent accounts for 3 percent of the mass of the recovered carbon fiber treated by the sizing agent. The high-crystallinity polypropylene has crystallinity of 68%, melt mass flow rate MFR of 30g/10min, recovered carbon fiber tensile strength of not less than 4500Mpa, tensile modulus of not less than 260GPa, sizing agent containing latent cross-linking agent 3% of the sizing agent by mass, and compatilizer selected from maleic anhydride grafted polypropylene with grafting rate of maleic anhydride of 1.2%.
The preparation method comprises extruding and granulating with a double screw extruder
And step S1, treating the recovered carbon fiber by adopting a sizing agent to obtain the recovered carbon fiber treated by the sizing agent.
And S2, adding high-crystallization polypropylene and a compatilizer from a main material port of a double-screw extruder, adding recycled carbon fibers treated by a sizing agent from a side material port of the double-screw extruder, setting the temperature of each region from a hopper to a die head of the double-screw extruder to be 195 ℃ in one region, 210 ℃ in two regions, 210 ℃ in three regions, 210 ℃ in four regions, 210 ℃ in five regions, 220 ℃ in six regions, 220 ℃ in seven regions and 230 ℃ in eight regions, and setting the temperature of a head of the double-screw extruder to be 230 ℃ and the rotating speed of a screw to be 150rpm.
And S3, extruding and granulating after melt blending by a double-screw extruder to obtain particles of the carbon fiber reinforced polypropylene composite material, wherein the particle length is 4mm.
The mechanical properties and organic volatile VOC tests were performed on the above examples and comparative examples.
The mechanical property test method comprises the following steps:
Tensile Strength and tensile modulus according to ISO 527-2, tensile Strength test conditions, 5mm/min, type 1A specimen. Tensile modulus test conditions, namely a tensile rate of 1mm/min;
Flexural Strength and flexural modulus according to ISO 178, span 64mm, spline size (80+ -2) mm× (10+ -0.2) mm× (4+ -0.2) mm. The test speed was 2mm/min.
The VOC test method is carried out according to a common bag method in the automobile industry, wherein the specification of a sample sheet is 80mm multiplied by 100mm, a benzene series analysis instrument is carried out by using a thermal desorption instrument-gas chromatography/mass spectrometry (ATD-GC-MS), the analysis method is carried out by referring to the specification of 5.1 in HJ/T400, an aldehyde ketone analysis instrument is carried out by using a High Performance Liquid Chromatography (HPLC), and the analysis method is carried out by referring to the specification of 5.2 in HJ/T400.
The test results are shown in table 1:
table 1 test results of examples and comparative examples
Corresponding to the embodiment of the application function implementation method, the application also provides an automobile part, an automobile and corresponding embodiments.
The embodiment of the application provides an automobile part, which is prepared from a carbon fiber reinforced polypropylene composite material. The automobile parts include a front end frame and a tail gate inner panel.
The density of the front end frame or the tail door inner plate prepared by the carbon fiber reinforced polypropylene composite material in the embodiment of the application is obviously lower than that of the prior front end frame or tail door inner plate. Based on the high-strength high-modulus characteristic of the material, the front end frame or the tail door inner plate is designed in a light-weight mode, the number of reinforcing ribs can be obviously reduced, the thickness of parts is reduced to 2-2.5mm, and the light-weight effect is more than 30%. By taking a front end frame as an example, through the performance verification of parts, the first-order mode of the front end frame is more than or equal to 100HZ, the maximum deformation of products such as a headlight bracket, a front protection bracket and the like is less than 1mm under the working condition of 100N, the deformation of a lock area applied with 1500N load in the X direction is less than 1mm, and the lock area on the front end frame is free from rupture and permanent deformation under the working condition of 2500N of limiting tension applied to the lock area. The maximum deformation, maximum stress, strength and rigidity of the front end frame under each working condition can meet the design requirements.
The embodiment of the application provides an automobile, which comprises the automobile parts.
The automobile provided by the embodiment of the application adopts the automobile parts, so that the production cost of the whole automobile can be greatly reduced, and the safety performance of the whole automobile is improved.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing description of embodiments of the application has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (9)

1. A carbon fiber reinforced polypropylene composite material, characterized in that:
The carbon fiber reinforced polypropylene composite material comprises, by mass, 50% -70% of high-crystalline polypropylene, 20% -30% of recycled carbon fibers treated by a sizing agent, 10% -15% of a compatilizer and the balance of other additives, wherein the sizing agent accounts for 3% -5% of the recycled carbon fibers treated by the sizing agent, the sizing agent comprises at least one of epoxy resin, polyamide resin, polyurethane resin, phenolic resin, vinyl ester resin and polyolefin resin, the latent cross-linking agent comprises isocyanate-NCO groups, the latent cross-linking agent accounts for 2% -5% of the sizing agent, the crystallinity of the high-crystalline polypropylene is 65% -75%, the tensile strength of the recycled carbon fibers selected by the recycled carbon fibers treated by the sizing agent is more than or equal to 4500MPa, and the compatilizer comprises one or two of maleic anhydride grafted polypropylene and acrylic acid grafted polypropylene.
2. The carbon fiber reinforced polypropylene composite material according to claim 1, wherein:
The other auxiliary agents at least comprise an antioxidant, a coupling agent, a nucleating agent, a lubricant and a weather-resistant agent;
The anti-oxidant accounts for 0.1-0.3% of the carbon fiber reinforced polypropylene composite material in percentage by mass, the coupling agent accounts for 0.3-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass, the nucleating agent accounts for 0.2-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass, the lubricant accounts for 0.5-1% of the carbon fiber reinforced polypropylene composite material in percentage by mass, and the weather-proof agent accounts for 0.3-0.5% of the carbon fiber reinforced polypropylene composite material in percentage by mass.
3. The carbon fiber reinforced polypropylene composite material according to claim 1, wherein:
The melt flow rate of the high crystalline polypropylene is 15-20g/10min at test conditions of a test temperature of 230 ℃ and a nominal load of 2.16 kg.
4. The carbon fiber reinforced polypropylene composite material according to claim 1, wherein:
The recycled carbon fibers selected from the recycled carbon fibers treated by the sizing agent are recycled chopped carbon fibers, and the length of the recycled chopped carbon fibers is 5mm-6mm.
5. The carbon fiber reinforced polypropylene composite material according to claim 1, wherein:
The grafting rate of maleic anhydride in the maleic anhydride grafted polypropylene is 1.2-1.5%, and/or,
The grafting rate of the acrylic acid in the acrylic acid grafted polypropylene is 1.2-1.5%.
6. A method for preparing the carbon fiber reinforced polypropylene composite material according to any one of claims 1 to 5, comprising:
treating the recovered carbon fiber by adopting the sizing agent to obtain the recovered carbon fiber treated by the sizing agent;
Adding the high-crystalline polypropylene, the compatilizer and other auxiliary agents from a main material port of production equipment, and adding the recycled carbon fiber treated by the sizing agent from a side material port of the production equipment;
And (3) carrying out melt blending on the added materials through the production equipment, and then extruding and granulating to obtain the carbon fiber reinforced polypropylene composite material.
7. The method according to claim 6, wherein the screw speed of the production apparatus is 100rpm to 200rpm.
8. An automobile part, characterized in that the automobile part is prepared from the carbon fiber reinforced polypropylene composite material according to any one of claims 1 to 5.
9. An automobile comprising the automobile part of claim 8.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103571036A (en) * 2013-11-13 2014-02-12 上海交通大学 Recovered carbon fiber reinforced polypropylene composite material and preparation method thereof
CN110734603A (en) * 2019-09-03 2020-01-31 会通新材料股份有限公司 carbon fiber reinforced polypropylene composite material pre-impregnated carbon fiber cloth and preparation method thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2783561B2 (en) * 1987-10-29 1998-08-06 大阪瓦斯株式会社 Carbon fiber for composite materials
JP2012149170A (en) * 2011-01-19 2012-08-09 Teijin Ltd Carbon fiber-reinforced polyolefin-based resin composite material and method for producing the same
KR101526742B1 (en) * 2013-12-17 2015-06-05 현대자동차주식회사 A resin composition of carbon fiber reinforced polypropylene with excellent molding property
CN105295368A (en) * 2015-11-02 2016-02-03 上海交通大学 Damp-heat aging resisting carbon fiber-reinforced nylon 66 compound material and preparation thereof
JP7084157B2 (en) * 2018-02-21 2022-06-14 帝人株式会社 Sizing agent composition, carbon fiber manufacturing method and sizing agent-adhered carbon fiber
CN109810414A (en) * 2018-12-17 2019-05-28 会通新材料股份有限公司 A kind of isocyanates surface modified carbon fibers-polypropylene composite material and preparation method
CN110041700B (en) * 2019-05-17 2021-05-25 金旸（厦门）新材料科技有限公司 Carbon fiber reinforced nylon material, preparation raw material, preparation method and application thereof
KR102563914B1 (en) * 2021-06-15 2023-08-08 지에스칼텍스 주식회사 Composition for fiber-reinforced composite material, fiber-reinforced composite material and molding thereof
CN114213751B (en) * 2021-12-09 2022-07-15 福建师范大学泉港石化研究院 Carbon fiber reinforced polypropylene composite material and preparation method thereof
CN115785569A (en) * 2022-12-28 2023-03-14 重庆会通科技有限公司 Carbon fiber reinforced polypropylene composite material and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103571036A (en) * 2013-11-13 2014-02-12 上海交通大学 Recovered carbon fiber reinforced polypropylene composite material and preparation method thereof
CN110734603A (en) * 2019-09-03 2020-01-31 会通新材料股份有限公司 carbon fiber reinforced polypropylene composite material pre-impregnated carbon fiber cloth and preparation method thereof

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