CN116855103A - Modified graphene, its preparation method and its application in epoxy fire retardant coatings - Google Patents
Modified graphene, its preparation method and its application in epoxy fire retardant coatings Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
- C09D5/185—Intumescent paints
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Abstract
本发明公开了一种改性石墨烯及其制备方法及在环氧防火涂料中的应用，涉及涂料的技术领域。改性石墨烯包括氧化石墨烯、尿素、磷酸。本发明还公开一种改性石墨烯的制备方法，将尿素、磷酸、氧化石墨烯和水混合，搅拌，干燥，即得到改性石墨烯。本发明通过在环氧防火涂料中添加改性石墨烯，使得的环氧防火涂料的碳层强度、碳层致密性、抑烟性以及发泡性能得到较大的提升。
The invention discloses modified graphene, its preparation method and its application in epoxy fireproof coatings, and relates to the technical field of coatings. Modified graphene includes graphene oxide, urea, and phosphoric acid. The invention also discloses a method for preparing modified graphene. The method includes mixing urea, phosphoric acid, graphene oxide and water, stirring and drying to obtain modified graphene. By adding modified graphene to the epoxy fire-retardant coating, the present invention greatly improves the carbon layer strength, carbon layer density, smoke suppression and foaming properties of the epoxy fire-retardant coating.
Description
Technical Field
The application relates to the technical field of paint, in particular to modified graphene, a preparation method thereof and application thereof in epoxy fireproof paint.
Background
The epoxy fireproof paint is widely applied to various fields of various steel structure buildings, petrochemical equipment and devices, ships, marine equipment and the like. The fireproof paint with epoxy resin and proper amine curing agent as base material has excellent adhesion, hardness, impact resistance, anticorrosive performance, heat and humidity resistance, chemical resistance, etc. In particular, the epoxy resin fireproof paint can be kept intact and adhered to a substrate after explosion, and is more suitable for offshore oil platforms, oil fields, oil refineries, petrochemical plants and the like compared with the traditional expansion fireproof paint.
However, the conventional epoxy solvent-free fire-retardant coating has low foaming ratio and poor fire resistance, and the carbon layer is easily oxidized by hydrocarbon spray flame and broken.
Disclosure of Invention
The application aims to overcome the defects of the prior art and provides modified graphene, a preparation method thereof and application thereof in epoxy fireproof paint. According to the application, the modified graphene is added into the epoxy fireproof coating, so that the epoxy fireproof coating has excellent performances in the aspects of fireproof time, foaming multiplying power and carbon layer quality.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
in a first aspect, the application provides modified graphene, which comprises graphene oxide, urea and phosphoric acid, wherein the mass ratio of the graphene oxide to the urea to the phosphoric acid is (1-2): (8-10): (25-30).
Preferably, the mass ratio of graphene oxide to urea to phosphoric acid is 1:10:25.
according to the application, graphene oxide, urea and phosphoric acid in a specific proportion are adopted for modification, so that the modified graphene has a larger specific surface area and excellent mechanical properties.
In a second aspect, the application provides a preparation method of the modified graphene, which comprises the following steps:
mixing urea, phosphoric acid, graphene oxide and water, stirring, and drying to obtain the modified graphene.
Principle of graphene modification: since graphene has a large specific surface area and excellent mechanical properties, the properties of graphene can be improved by doping means. The P-doped graphene shows excellent smoke suppression performance in the fireproof paint, and the N-doped graphene shows excellent foaming performance in the fireproof paint. Therefore, the modified graphene is added into the epoxy fireproof coating, so that the carbon layer strength, the carbon layer compactness, the smoke suppression performance and the foaming performance of the epoxy fireproof coating are greatly improved.
In a third aspect, the application provides an application of the modified graphene to an epoxy fireproof coating, wherein the epoxy fireproof coating comprises an A component and a B component, and the A component comprises the following components in parts by weight: 25-50 parts of epoxy resin adhesive; 1-10 parts of epoxy reactive diluent; 25-50 parts of an acid catalyst; 5-15 parts of a charring agent; 1-10 parts of foaming agent; 1-5 parts of modified graphene;
the component B comprises the following components in parts by mass: 25-50 parts of curing agent; 1-5 parts of curing agent accelerator; 5-15 parts of foaming agent;
the component A and the component B are uniformly mixed according to the mass ratio of (2-3) to (1-1.5).
Preferably, the mass ratio of the component A to the component B is 2.5:1, mixing uniformly.
The application adopts the A component and the B component with specific mass ratio to be matched with each other, which is favorable for further improving the foaming multiplying power and the carbon layer quality of the epoxy fireproof coating, thereby further improving the fireproof performance and the mechanical performance of the epoxy fireproof coating.
Preferably, the component A further comprises the following components in parts by mass: 1-10 parts of plasticizer; 1-5 parts of reinforcing fiber; 1-5 parts of auxiliary agent.
Preferably, the component B further comprises the following components in parts by mass: 25-50 parts of inorganic filler; 1-5 parts of an auxiliary agent; 1-5 parts of reinforcing fiber.
Preferably, the epoxy resin binder is bisphenol diglycidyl ether epoxy resin.
More preferably, the bisphenol diglycidyl ether epoxy resin is bisphenol a diglycidyl ether and/or bisphenol F diglycidyl ether epoxy resin.
Preferably, the epoxy resin adhesive has an epoxy equivalent weight of 180-192.
The epoxy resin adhesives of the present application employ a non-aqueous titration method of hydrogen bromide-glacial acetic acid to determine the epoxy equivalent.
Preferably, the epoxy reactive diluent is at least one of neopentyl glycol diglycidyl ether, 1,6 hexanediol diglycidyl ether, and 1,4 butanediol diglycidyl ether.
Preferably, the acid catalyst is at least one of ammonium polyphosphate, boric acid, phosphate, borate, phosphate ester, and borate.
More preferably, the acid catalyst is ammonium polyphosphate, and the degree of polymerization of the ammonium polyphosphate is greater than 1000 。
The application adopts ammonium polyphosphate with polymerization degree more than 1000, so that the fireproof performance of the epoxy fireproof paint is further improved.
Preferably, the char-forming agent is at least one of starch, pentaerythritol, dipentaerythritol, and starch. More preferably, the char-forming agent is pentaerythritol.
Preferably, the foaming agent is at least one of urea, polyamide, melamine and melamine cyanurate. More preferably, the blowing agent is melamine.
Preferably, the plasticizer is at least one of isopropyl triphenyl phosphate, tricresyl phosphate, triphenyl phosphate, diphenyl monooctyl phosphate.
Preferably, the reinforcing fiber is at least one of glass fiber, mineral fiber, sepiolite fiber, and carbon fiber.
Preferably, the auxiliary agent is at least one of dispersing agent, defoamer, rheological auxiliary agent and leveling agent.
Preferably, the curing agent is an amine curing agent.
Preferably, the amine curing agent comprises at least one of polyetheramine, polyamide, fatty amine.
Preferably, the curing accelerator is at least one of an amine accelerator, an imidazole and its salt accelerator, and a metal carboxylate accelerator.
More preferably, the curing accelerator comprises at least one of DMP-30, BMDA, DBU, ancamine K54.
Preferably, the inorganic filler is at least one of titanium dioxide, talcum powder, kaolin, diatomite, alumina, calcium silicate, calcium carbonate, mica powder, silicon micropowder and the like.
In a fourth aspect, the application provides a preparation method of the epoxy fireproof paint, which comprises the following steps:
step 1: preparation of component A
Mixing the components in the component A, putting into a dispersing machine, raising the temperature to 55-60 ℃, stirring at the speed of 500-600r/min, and starting stirring and mixing for 50-60min to obtain the component A;
step 2: preparation of component B
Mixing the components in the component B, putting into a dispersing machine, raising the temperature to 55-60 ℃, stirring at the speed of 500-600r/min, and starting stirring and mixing for 50-60min to obtain the component B;
step 3: the component A and the component B are mixed for use
And uniformly mixing the component A and the component B to obtain the epoxy fireproof coating.
The epoxy fireproof paint prepared by the method provided by the application has the advantages that the carbon layer is compact and hard, is not easy to be oxidized and broken by hydrocarbon spray flame, is beneficial to improving the fireproof performance of the epoxy fireproof paint, and has stronger mechanical performance.
Compared with the prior art, the application has the beneficial effects that:
according to the application, nitrogen and phosphorus modification is carried out on graphene by doping means, and as the graphene has a large specific surface area and excellent mechanical property, the P-doped graphene shows excellent smoke suppression performance in the fireproof paint, and the N-doped graphene shows excellent foaming performance in the fireproof paint, so that the fireproof paint added with the modified graphene has excellent performance in the aspects of fireproof time, foaming multiplying power and carbon layer quality, and is suitable for popularization and application.
Drawings
FIG. 1 is a schematic illustration of an epoxy fire retardant coating template after firing in example 1 of the present application.
FIG. 2 is a schematic illustration of an epoxy fire retardant coating template of example 2 of the present application after firing.
FIG. 3 is a schematic illustration of an epoxy fire retardant coating template of example 3 of the present application after firing.
FIG. 4 is a schematic illustration of an epoxy fire retardant coating template of example 4 of the present application after firing.
FIG. 5 is a schematic illustration of an epoxy fire retardant coating template of example 5 of the present application after firing.
FIG. 6 is a schematic representation of an epoxy fire retardant coating template of example 6 of the present application after firing.
FIG. 7 is a schematic representation of the epoxy fire retardant coating of comparative example 1 of the present application after template firing.
FIG. 8 is a schematic representation of the application after firing of a template of epoxy fire retardant coating in comparative example 2.
FIG. 9 is a schematic representation of a sample epoxy fire retardant coating in comparative example 3 of the present application after firing.
FIG. 10 is a schematic representation of the epoxy fire retardant coating of comparative example 4 of the present application after template firing.
FIG. 11 is a schematic representation of the epoxy fire retardant coating of comparative example 5 of the present application after template firing.
FIG. 12 is a schematic representation of the application after firing of an epoxy fire retardant coating template in comparative example 6.
Detailed Description
For better illustrating the objects, technical solutions and advantages of the present application, the present application will be further described with reference to specific examples, but the scope and embodiments of the present application are not limited thereto.
Materials, reagents and the like used in the following examples are commercially available ones unless otherwise specified.
Example 1
The embodiment discloses modified graphene, which comprises the following components: urea, graphene oxide, phosphoric acid solution, and the mass ratio of graphene oxide slurry to urea to phosphoric acid is 1:8:25.
the embodiment also discloses a preparation method of the modified graphene, which comprises the following steps:
1) Dissolving 8g of urea in 500ml of deionized water, adding 1g of graphene oxide, and dispersing in a homogenizer at a rotating speed of 150r/min for 30min at normal temperature to obtain nitrogen modified graphene mixed slurry;
2) Adding 25g of phosphoric acid into the nitrogen modified graphene mixed slurry, and dispersing for 30min in a homogenizer at the normal temperature with the rotating speed of 150r/min to obtain the modified graphene mixed slurry;
3) And (3) drying the modified graphene mixed slurry for 12 hours in a vacuum furnace at 90 ℃ to obtain the modified graphene.
The embodiment also discloses an epoxy fireproof paint which comprises a component A and a component B,
the component A comprises the following components in parts by mass: 40 parts of an epoxy resin adhesive; 5 parts of epoxy reactive diluent; 30 parts of an acid catalyst; 15 parts of a char forming agent; 10 parts of foaming agent; 5 parts of plasticizer; 3 parts of reinforcing fibers; 2 parts of auxiliary agent; 3 parts of modified graphene;
wherein the epoxy resin adhesive is bisphenol A type liquid epoxy resin YD-128; the epoxy reactive diluent is 1,6 hexanediol diglycidyl ether; the acid catalyst is ammonium polyphosphate; the char-forming agent is monopentaerythritol; the foaming agent is melamine; the plasticizer is triphenyl phosphate; the reinforcing fiber is carbon fiber; the auxiliary agent comprises 1 part of BYK161 dispersing agent and 1 part of a dymodus 6800 defoamer;
the component B comprises the following components in parts by mass: 50 parts of curing agent; 2 parts of a curing agent accelerator; 20 parts of inorganic filler; 2 parts of auxiliary agent; 10 parts of foaming agent; 3 parts of reinforcing fibers;
wherein the curing agent is Kening polyamide Versamid 140; the curing agent accelerator is Ancamine K54; the inorganic filler comprises 10 parts of titanium dioxide, 5 parts of kaolin and 5 parts of talcum powder; the auxiliary agent comprises 1 part of BYK161 dispersing agent and 1 part of a dymodus 6800 defoamer; the foaming agent is melamine; the reinforcing fiber is high silica fiber.
The embodiment also discloses a preparation method of the epoxy fireproof paint, which comprises the following steps:
step 1: preparation of component A
Uniformly mixing the components in the component A, putting the mixture into a dispersing machine, raising the temperature to 55 ℃, stirring at the speed of 500r/min, and starting stirring and mixing for 60min to obtain the component A;
step 2: preparation of component B
Uniformly mixing the components in the component B, putting the components into a dispersing machine, raising the temperature to 55 ℃, stirring at the speed of 500r/min, and starting stirring and mixing for 60min to obtain the component B;
step 3: the component A and the component B are mixed for use
The component A and the component B are mixed according to the mass ratio of 2.5:1, and mixing and stirring evenly to obtain the epoxy fireproof paint.
Example 2
The modified graphene is different from example 1 in that the mass ratio of graphene oxide, urea and phosphoric acid is 2:10:30, the other components are the same as in example 1.
Example 3
The modified graphene is different from example 1 in that the mass ratio of graphene oxide, urea and phosphoric acid is 1:10:25, the other steps are the same as those of example 1.
Example 4
The embodiment discloses an epoxy fireproof paint, which comprises an A component and a B component,
the component A comprises the following components in parts by mass: 25 parts of an epoxy resin adhesive; 10 parts of epoxy reactive diluent; 25 parts of an acid catalyst; 15 parts of a char forming agent; 10 parts of foaming agent; 10 parts of plasticizer; 5 parts of reinforcing fibers; 5 parts of an auxiliary agent; 5 parts of modified graphene;
wherein the epoxy resin adhesive is bisphenol A type liquid epoxy resin YD-128; the epoxy reactive diluent is 1,6 hexanediol diglycidyl ether; the acid catalyst is ammonium polyphosphate; the char-forming agent is monopentaerythritol; the foaming agent is melamine; the plasticizer is triphenyl phosphate; the reinforcing fiber is carbon fiber; the auxiliary agent comprises 2.5 parts of BYK161 dispersing agent and 2.5 parts of a rather 6800 defoamer;
the component B comprises the following components in parts by mass: 25 parts of a curing agent; 5 parts of a curing agent accelerator; 50 parts of inorganic filler; 5 parts of an auxiliary agent; 5 parts of a foaming agent; 1 part of reinforcing fiber;
wherein the curing agent is Kening polyamide Versamid 140; the curing agent accelerator is Ancamine K54; the inorganic filler comprises 25 parts of titanium dioxide, 12.5 parts of kaolin and 12.5 parts of talcum powder; the auxiliary agent comprises 2.5 parts of BYK161 dispersing agent and 2.5 parts of a rather 6800 defoamer; the foaming agent is melamine; the reinforcing fiber is high silica fiber.
The embodiment also discloses a preparation method of the epoxy fireproof paint, which comprises the following steps:
step 1: preparation of component A
Uniformly mixing the components in the component A, putting the mixture into a dispersing machine, raising the temperature to 60 ℃, stirring at the speed of 600r/min, and starting stirring and mixing for 50min to obtain the component A;
step 2: preparation of component B
Uniformly mixing the components in the component B, putting the components into a dispersing machine, raising the temperature to 60 ℃, stirring at the speed of 600r/min, and starting stirring and mixing for 50min to obtain the component B;
step 3: the component A and the component B are mixed for use
The component A and the component B are mixed according to the mass ratio of 2:1.5, and mixing and stirring evenly to obtain the epoxy fireproof paint.
Example 5
The embodiment discloses an epoxy fireproof paint, which comprises an A component and a B component,
the component A comprises the following components in parts by mass: 50 parts of an epoxy resin adhesive; 1 part of epoxy reactive diluent; 50 parts of an acid catalyst; 5 parts of a char forming agent; 1 part of foaming agent; 1 part of plasticizer; 1 part of reinforcing fiber; 1 part of an auxiliary agent; 3 parts of modified graphene;
wherein the epoxy resin adhesive is bisphenol A type liquid epoxy resin YD-128; the epoxy reactive diluent is 1,6 hexanediol diglycidyl ether; the acid catalyst is ammonium polyphosphate; the char-forming agent is monopentaerythritol; the foaming agent is melamine; the plasticizer is triphenyl phosphate; the reinforcing fiber is carbon fiber; the auxiliary agent comprises 0.5 part of BYK161 dispersing agent and 0.5 part of a rather 6800 defoamer;
the component B comprises the following components in parts by mass: 50 parts of curing agent; 1 part of curing agent accelerator; 25 parts of inorganic filler; 1 part of an auxiliary agent; 15 parts of a foaming agent; 5 parts of reinforcing fibers;
wherein the curing agent is Kening polyamide Versamid 140; the curing agent accelerator is Ancamine K54; the inorganic filler comprises 10 parts of titanium dioxide, 10 parts of kaolin and 5 parts of talcum powder; the auxiliary agent comprises 0.5 part of BYK161 dispersing agent and 0.5 part of a rather 6800 defoamer; the foaming agent is melamine; the reinforcing fiber is high silica fiber.
The embodiment also discloses a preparation method of the epoxy fireproof paint, which comprises the following steps:
step 1: preparation of component A
Uniformly mixing the components in the component A, putting the mixture into a dispersing machine, raising the temperature to 55 ℃, stirring at the speed of 500r/min, and starting stirring and mixing for 60min to obtain the component A;
step 2: preparation of component B
Uniformly mixing the components in the component B, putting the components into a dispersing machine, raising the temperature to 55 ℃, stirring at the speed of 500r/min, and starting stirring and mixing for 60min to obtain the component B;
step 3: the component A and the component B are mixed for use
The component A and the component B are mixed according to the mass ratio of 3:1, and mixing and stirring evenly to obtain the epoxy fireproof paint.
Example 6
An epoxy fireproof coating is different from example 1 in that 5 parts of modified graphene is used in the component A, and the other parts are the same as in example 1.
Comparative example 1
An epoxy fireproof coating is different from example 1 in that 0 part of modified graphene in the A component is the same as in example 1.
Comparative example 2
An epoxy fireproof coating is different from example 1 in that 1 part of modified graphene in the A component is the same as in example 1.
Comparative example 3
An epoxy fireproof paint is different from example 1 in that a commercially available conventional epoxy fireproof paint (commercially available epoxy fireproof paint components are composed of liquid epoxy resin, conventional reactive diluent, amidoamine, carbonization catalyst, carbonizing agent, foaming agent and corresponding auxiliary agents) is selected for comparison.
Comparative example 4
The epoxy fireproof paint is different from the epoxy fireproof paint in that in the step 3, the A component and the B component are mixed according to the mass ratio of 1:2 are weighed and mixed and stirred uniformly, and the other components are the same as in example 1.
Comparative example 5
An epoxy fireproof coating is different from example 1 in that in step 1, the temperature is increased to 80 ℃, the stirring speed is 800r/min, and stirring and mixing are started for 40min; in step 2, the temperature was raised to 50℃and the stirring rate was 400r/min, and stirring and mixing was started for 80min, except that the procedure was the same as in example 1.
Comparative example 6
An epoxy fireproof coating is different from example 1 in that the mass ratio of graphene oxide, urea and phosphoric acid is 3:12:20, all other than this, are the same as in example 1.
Experiment
And referring to national standard GB 14007-2018, adopting Hydrocarbon (HC) fire heating conditions to test the fire resistance of the prepared sample plate.
TABLE 1
According to the comparison of the comparative example 1 and the example 1 in the table 1, no modified graphene is added in the comparative example 1, the fire resistance time of the epoxy fireproof coating is lower than that of the example 1, and as can be seen from fig. 7, the carbon layer is not compact and is easy to burn through, and the fact that the modified graphene is not added in the epoxy fireproof coating is indicated, so that the fire resistance time, the foaming ratio and the quality of the carbon layer of the epoxy fireproof coating are easily affected greatly.
According to the comparison of comparative example 2 and example 1 in table 1, the addition amount of the modified graphene in comparative example 2 is too small, the fire resistance time and the foaming ratio of the epoxy fireproof coating are lower than those of example 1, and as can be seen from fig. 8, the carbon layer is slightly burnt through, which means that the content of the modified graphene in the epoxy fireproof coating is too low, so that the fireproof performance of the epoxy fireproof coating cannot be greatly improved.
As can be seen from fig. 9, the conventional epoxy fireproof paint is adopted in comparative example 3, and the carbon layer is loose and burnt through, and the foaming ratio and the fireproof time of the epoxy fireproof paint are lower than those of example 1, which indicates that the epoxy fireproof paint prepared by the method of the application can have excellent fireproof performance and mechanical performance only.
According to the comparison of comparative example 4 with example 1 in Table 1, the mass ratio of the A component to the B component in comparative example 4 is not within the range protected by the present application, and the fireproof performance of the epoxy fireproof coating is inferior to that of example 1, indicating that the mass ratio of the A component to the B component is only within the range of (2-3): 1-1.5, so that the epoxy fireproof coating has excellent fireproof performance and mechanical performance.
According to the comparison of comparative example 5 with example 1 in table 1, the temperature, stirring rate and stirring time of step 1 and step 2 in comparative example 5 are not within the scope of the present application, and the performance of the epoxy fireproof paint is not as good as that of example 1, because: too high a temperature can easily cause thermal decomposition of the flame retardant; too short stirring time is easy to influence the uniformity of the coating, and too long stirring time is easy to influence the production efficiency; too slow a stirring rate may result in uneven mixing of the A, B components and too fast a stirring rate may easily result in too high a temperature of the A, B components, resulting in decomposition of the flame retardant. Therefore, not any temperature, stirring rate and stirring time are adopted, so that the epoxy fireproof paint has excellent fireproof performance.
According to the comparison of comparative example 6 with example 1 in table 1, the mass ratio of graphene oxide, urea and phosphoric acid in comparative example 6 is not within the scope of the protection of the present application, and the performance of the epoxy fireproof paint is inferior to that of example 1, which indicates that the mass ratio of graphene oxide, urea and phosphoric acid is only (1-2): (8-10): in the range of (25-30), the epoxy fireproof coating has excellent fireproof performance and mechanical performance.
In summary, according to examples 1 to 6, the graphene oxide is modified by urea and phosphoric acid in a specific ratio, the modified graphene is added into the epoxy fireproof coating, and the component A and the component B in a specific mass ratio are compounded and cooperate with a specific temperature, a specific stirring rate and a specific stirring time, so that the strength, compactness, smoke suppression and foaming performance of the prepared epoxy fireproof coating are greatly improved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the scope of the present application, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present application.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310669846.3A CN116855103B (en) | 2023-06-07 | 2023-06-07 | A modified graphene, its preparation method, and its application in epoxy fire-retardant coatings. |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310669846.3A CN116855103B (en) | 2023-06-07 | 2023-06-07 | A modified graphene, its preparation method, and its application in epoxy fire-retardant coatings. |
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| Publication Number | Publication Date |
|---|---|
| CN116855103A true CN116855103A (en) | 2023-10-10 |
| CN116855103B CN116855103B (en) | 2026-03-20 |
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| CN117844346A (en) * | 2024-01-24 | 2024-04-09 | 深圳市朗迈新材料科技有限公司 | Modified graphene flame-retardant floor paint and preparation method thereof |
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| CN116855103B (en) | 2026-03-20 |
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