WO2022021908A1 - Particules de plastique nanométriques antibactériennes et antisalissure pour tables et chaises et procédé de préparation - Google Patents

Particules de plastique nanométriques antibactériennes et antisalissure pour tables et chaises et procédé de préparation Download PDF

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WO2022021908A1
WO2022021908A1 PCT/CN2021/083305 CN2021083305W WO2022021908A1 WO 2022021908 A1 WO2022021908 A1 WO 2022021908A1 CN 2021083305 W CN2021083305 W CN 2021083305W WO 2022021908 A1 WO2022021908 A1 WO 2022021908A1
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antibacterial
antifouling
parts
weight
antibacterial agent
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胡森川
杨曦
罗万象
陈志益
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE

Definitions

  • the invention belongs to the technical field of functional plastics, and in particular relates to nanometer antibacterial and antifouling table and chair plastic particles and a preparation method.
  • plastic functionalization With the development of plastic functionalization, many furniture use plastic materials instead of wood materials to be widely used.
  • tables and chairs in some public places, such as kindergarten tables and chairs, and beds are made of plastic; bus seats, hospital seats, etc. use more plastic materials.
  • Plastic products occupy a very important position in people's daily life.
  • Antibacterial plastic is currently a better means to solve the bacterial contamination of plastic tables and chairs.
  • antibacterial plastic products are usually made by adding antibacterial agents to the plastic, so that the plastic itself has antibacterial properties, which can kill or inhibit the reproduction of bacteria adhering to the plastic within a certain period of time. .
  • the development of antibacterial plastics has played a good exemplary role in protecting human health. Especially with the continuous development of antibacterial agents and antibacterial technology, it has been rapidly applied in many fields of plastic products.
  • antibacterial plastics are widely used in household air conditioners, refrigerator drawers, and car interiors.
  • the research on antibacterial plastics has formed a complete technical chain, which involves more types of antibacterial agents, antibacterial dispersion, and antibacterial effects.
  • the current antibacterial agents include inorganic antibacterial agents, organic antibacterial agents, natural antibacterial agents and synergistic composite antibacterial agents of various antibacterial agents.
  • the antibacterial effect of antibacterial agents is not ideal.
  • the specific manifestations are: inorganic antibacterial agents meet the high temperature thermal processing of plastics, with good durability, but limited antibacterial effect; organic antibacterial agents have obvious antibacterial effect, but poor thermal processing resistance of plastics, easy to degrade and decompose at high temperature, and antibacterial persistence poor.
  • the inorganic antibacterial agents are mostly metal ion antibacterial agents, which are composed of carriers and antibacterial components.
  • the carrier is mainly titanium dioxide, porous zeolite powder, etc.
  • the antibacterial active ingredients are silver ion, zinc ion, copper ion, etc.
  • the antibacterial mechanism of inorganic antibacterial agents is that metal ions are easily combined with proteins, which destroys the spatial structure and activity of proteins and enzymes, and terminates the metabolism of microorganisms. Therefore, in order to better achieve antibacterial, it is hoped that the inorganic antibacterial agent has the best antibacterial effect when it contacts bacteria on the surface of plastic products.
  • the inorganic antibacterial agent such as silver ions is loaded on the ultra-fine silica or titanium dioxide and added to the plastic.
  • the agent is easy to exude and also affects the antibacterial persistence.
  • plastic table and chair products we require not only excellent antibacterial properties, but also antifouling.
  • Plastic table and chair products are in contact with the human body for a long time, and the sweat and other dirt of the human body are very easy to stay on the surface of the plastic table and chair products, which promotes the breeding of bacteria. Therefore, it is of great significance to improve the antibacterial and bacteriostatic properties of plastic table and chair products through the synergistic treatment of antibacterial agents and antifouling.
  • the present invention proposes a nanometer antibacterial and antifouling table and chair plastic particle; and further provides a preparation method for obtaining the plastic particle.
  • Tables and chairs prepared by injection molding or molding of nano antibacterial and antifouling table and chair plastic particles have long-lasting antibacterial effect, and can effectively prevent the retention of dirt on the surface and keep clean for a long time.
  • the present invention provides a preparation method of nano antibacterial and antifouling table and chair plastic particles, characterized in that the specific preparation method is as follows:
  • step S2 the semi-dry gel obtained in step S1 is uniformly stirred with zinc nitrate hexahydrate, silver nitrate, and deionized water, then a polytetrafluoroethylene emulsion is added, and the mixture is uniformly dispersed and spray-dried to obtain a composite antibacterial agent;
  • step S3 prepare the composite antibacterial agent, zinc tungstate and white oil obtained in step S2 into a slurry, send it to a sand mill, use 0.03mm zirconia as a grinding medium for grinding for 2-4 hours, and centrifuge to obtain a nanocomposite antibacterial agent ;
  • step S4 adding the nanocomposite antibacterial agent obtained in step S3 to the molten 58# paraffin, ultrasonically dispersing, and then mixing with polypropylene, high-density polyethylene, inorganic filler, dispersant, antistatic agent, flame retardant, antioxidant, colorant Disperse evenly in a high-speed mixer, send it to a twin-screw extruder for extrusion, hot die face granulation, air cooling, and sieve with a vibrating screen to obtain a nano-antibacterial and antifouling table and chair plastic granules.
  • the speed of high-speed dispersion in S1 is controlled at 800-1200rpm; since sodium methylsilicate is alkaline and difficult to dissolve in water, the sodium methylsilicate is dispersed in water by high-speed stirring, and acid citric acid is used to disperse it in water.
  • the system was continuously adjusted to be acidic, so that the sodium methylsilicate was hydrolyzed to silica gel.
  • the semi-dry gel in S2 has abundant nano-pores and adsorption properties, and it is used as a carrier to adsorb and load zinc nitrate hexahydrate and silver nitrate, and further add polytetrafluoroethylene emulsion for spray drying, so that the obtained composite antibacterial agent Zinc ions and silver ions are fully dispersed in the nano-pores; at the same time, polytetrafluoroethylene emulsion is used as a hydrophobic self-cleaning material, the adhesive material is in the micropores, and the surface of the gel particles is fully coated, bonded and fixed to prevent zinc ions, Desorption of silver ions.
  • the additions of the semi-dried gel, hexahydrate zinc nitrate, silver nitrate, deionized water, and polytetrafluoroethylene emulsion described in S2 are: 10-15 parts by weight of semi-dried gel, hexahydrate nitric acid 3-5 parts by weight of zinc, 1-3 parts by weight of silver nitrate, 30-50 parts by weight of deionized water, and 3-6 parts by weight of polytetrafluoroethylene emulsion.
  • the polytetrafluoroethylene emulsion is an emulsion with a solid content of 40% (wt), which not only has good adhesion, but also the material formed after adhesion has hydrophobic self-cleaning properties, which can effectively prevent plastic products from being used in antibacterial plastics. Dirt pollution.
  • the spray drying described in S2 adopts a centrifugal spray dryer, and the dispersion is dispersed and sprayed in a mist form under the centrifugal action by high-speed rotation at 25000rpm, enters the drying chamber and contacts with hot air for rapid drying, and is collected by a cyclone separator , to obtain a composite antibacterial agent.
  • compound antibacterial agent, zinc tungstate and white oil are prepared into a slurry with a mass ratio of 4-8:1-2:40-60; although the compound antibacterial agent is loaded and fixed with zinc ions and silver ions, The particles are relatively coarse.
  • the particles can reach the nano-scale, which is beneficial to the improvement of the antibacterial effect; after the sand grinding separation, the white oil can be recycled and reused.
  • a small amount of white oil is dispersed in the nano antibacterial agent.
  • White oil is a common lubricant for plastics and will not affect the later use.
  • the sand mill is a dual-power centrifugal nano sand mill (the experimental machine is the NT-V10S type of Dongguan Langling Machinery Co., Ltd.).
  • the raw materials described in S4 are prepared according to the weight portion, wherein, 3-5 parts of nanocomposite antibacterial agent, 3-5 parts of 58# paraffin, 60-70 parts of polypropylene, 10-15 parts of high density polyethylene, 5-8 parts of inorganic filler, 0.5-1 part of dispersant, 0.1-0.2 part of antistatic agent, 1-2 part of flame retardant, 0.05-0.1 part of antioxidant, 0.1-5 part of colorant.
  • the nanocomposite antibacterial agent is used in a small amount, it is difficult to disperse, and it is directly mixed with bulk raw materials to affect the mixing effect and dispersibility.
  • the nanocomposite antibacterial agent is pre-dispersed in the molten 58# paraffin through ultrasonic dispersion, which is beneficial to the nanocomposite antibacterial agent.
  • the agent is dispersed in the bulk raw material.
  • the high-speed mixer described in S4 is a conventional plastic premixing device, the temperature of the high-speed mixer is set to 80-100° C., and the rotational speed is controlled to 600-800 rpm.
  • the grade of polypropylene described in S4 is K7726H; the grade of high-density polyethylene used is HDPE8050; the inorganic filler is at least one of talc, mica powder, wollastonite powder; the dispersant Select one of polyethylene wax and ethylene bis-stearamide; the antistatic agent is one of glycerol monostearate and vegetable glyceride; the flame retardant is selected from antimony trioxide, hydrogen One or more of magnesium oxide and aluminum hydroxide; the antioxidant is selected from one of antioxidant 1010, antioxidant 168, and antioxidant DSTP; the colorant is specially used for plastics according to specific product color requirements Pigment or color masterbatch, no special limitation.
  • the twin-screw extruder described in S4 is extruded as a co-rotating twin-screw extruder, and the twin-screw extruder is provided with five sections of temperature control, from feeding to discharging: the first section is 130-150 °C, the second section 170-180 °C, the third section 190-200 °C, the fourth section 170-180 °C, and the fifth section 160-165 °C.
  • twin-screw extruder described in S4 is a co-rotating twin-screw extruder with a screw length-diameter ratio L/D of 45.
  • the present invention provides a kind of nano antibacterial and antifouling table and chair plastic particles prepared by the above method.
  • the present invention prepares an antibacterial plastic particle specially used for plastic tables and chairs. Sodium hydrolyzed into silica gel nanopores loaded with silver ions and zinc ions, treated with polytetrafluoroethylene emulsion, and obtained nanocomposite antibacterial agent by centrifugal spray drying and sand mill.
  • the nanocomposite antibacterial agent has both While antibacterial, it has hydrophobic and self-cleaning properties.
  • the nanocomposite antibacterial agent After being used to prepare antibacterial plastic products, the nanocomposite antibacterial agent forms antibacterial and self-cleaning and antifouling functions in the product; further, zinc tungstate and tungstic acid are compounded in the nanocomposite antibacterial agent.
  • Zinc is a semiconductor and also contains zinc ions.
  • the zinc ions of zinc tungstate are antibacterial, and on the other hand, their photocatalytic effect can further antibacterial and sterilize.
  • the present invention preferably meets the basic performance requirements of plastic tables and chairs, and prepares nano-antibacterial and anti-fouling table and chair plastic particles through reasonable formula coordination, which can be directly used for injection molding to prepare tables and chairs, and has stable and long-lasting antibacterial properties. .
  • silver ions and zinc ions are loaded in the nano-pores where sodium methyl silicate is hydrolyzed into silica gel, and treated with polytetrafluoroethylene emulsion, and nanometers are obtained by centrifugal spray drying and sand mill.
  • the composite antibacterial agent and the nanocomposite antibacterial agent are both antibacterial and hydrophobic and self-cleaning. This synergistic effect is beneficial to prevent bacteria from growing on the surface of plastic tables and chairs and improve antibacterial properties.
  • zinc tungstate is compounded in the nanocomposite antibacterial agent, and the antibacterial and photocatalytic sterilization of zinc ions of zinc tungstate is used at the same time to synergistically improve the antibacterial effect.
  • the preparation method of the present invention is easy to control, and the key is to obtain the nano-composite antibacterial agent by centrifugal spraying and sanding.
  • the separation and spray drying and sanding occupy less space, which will not increase the burden on the production enterprise; the remaining equipment is commonly used in plastic extrusion processing. equipment. Therefore, the technology can be easily and quickly put into operation, and the large-scale and stable production can be achieved. 1. According to the present invention.
  • Fig. 1 is a schematic diagram of the preparation process of a nano-antibacterial and antifouling table and chair plastic particle of the present invention.
  • Fig. 2 is a kind of nanometer antibacterial and antifouling table and chair plastic particles prepared by the method of Example 1.
  • the pellets are white and smooth, and can be directly accommodated to prepare antibacterial tables and chairs.
  • the following examples are intended to further describe the content of the present invention, rather than limit the protection scope of the claims of the present invention. If the specific conditions are not indicated in the examples, it is carried out according to the conventional conditions or the conditions suggested by the manufacturer. On the premise of not affecting the use, conventional raw materials can be purchased from the market.
  • the colorant can be the toner or color masterbatch prepared by the manufacturer according to the color needs.
  • step S2 mixing and stirring the semi-dry gel thing 10kg, hexahydrate zinc nitrate 3kg, silver nitrate 1kg, deionized water 30kg obtained in step S1, then adding 3kg solid content at 40% (wt) polytetrafluoroethylene emulsion, After the dispersion is uniform, it is sent to a centrifugal spray dryer, and the dispersion liquid is dispersed and sprayed in a mist form under the centrifugal action by high-speed rotation at 25,000 rpm. It enters the drying chamber and contacts with hot air for rapid drying, and is collected by a cyclone separator to obtain a composite antibacterial agent. ;
  • step S3 the composite antibacterial agent, zinc tungstate, and white oil obtained in step S2 are prepared as a slurry with a mass ratio of 8: 1: 40, take 10kg of the slurry, and put it in an NT-V10S type dual-power centrifugal nano-sand mill (Dongguan). Equipment of Langling Machinery Co., Ltd.), grind 2h with 0.03mm zirconia as the grinding medium, and centrifuge to obtain nanocomposite antibacterial agent;
  • step S4 adding 3 parts by weight of the nanocomposite antibacterial agent obtained in step S3 to 5 parts by weight of molten 58# paraffin, ultrasonically dispersed for 10min, then mixed with 70 parts by weight of polypropylene K7726H, 15 parts by weight of high-density polyethylene HDPE8050, and a particle size of 10 ⁇ m 5 parts by weight of talc powder, 0.5 part by weight of dispersant polyethylene wax, 0.2 part by weight of antistatic agent glyceryl monostearate, 2 parts by weight of flame retardant magnesium hydroxide, 0.05 part by weight of antioxidant 1010, titanium dioxide 0.2 parts by weight of the pink masterbatch is uniformly dispersed in a high-speed mixer, the temperature of the high-speed mixer is set to 100°C, and the rotational speed is controlled at 600rpm; The extruder is set with five stages of temperature control, from feeding to discharging: the first stage is 150°C, the second stage is 170°C, the third stage is 190°
  • step S2 the semi-dry gel thing 15kg, hexahydrate zinc nitrate 5kg, silver nitrate 2kg, deionized water 50kg obtained in step S1 are mixed and stirred, then add 3kg solid content at 40% (wt) polytetrafluoroethylene emulsion, After the dispersion is uniform, it is sent to a centrifugal spray dryer, and the dispersion liquid is dispersed and sprayed in a mist form under the centrifugal action by high-speed rotation at 25,000 rpm. It enters the drying chamber and contacts with hot air for rapid drying, and is collected by a cyclone separator to obtain a composite antibacterial agent. ;
  • step S3 the composite antibacterial agent, zinc tungstate and white oil obtained in step S2 are prepared as a slurry with a mass ratio of 6: 2: 60, take 10kg of the slurry, and put it in a NT-V10S type dual-power centrifugal nano-sand mill (Dongguan). Equipment of Langling Machinery Co., Ltd.), grind 2h with 0.03mm zirconia as the grinding medium, and centrifuge to obtain nanocomposite antibacterial agent;
  • step S4 adding 3-5 parts by weight of the nanocomposite antibacterial agent obtained in step S3 to 3-5 parts by weight of molten 58# paraffin, ultrasonically dispersed for 10min, then mixed with 70 parts by weight of polypropylene K7726H, 15 parts by weight of high-density polyethylene HDPE8050, 5 parts by weight of mica powder with a particle size of 10 ⁇ m, 0.5 part by weight of dispersant ethylene bis-stearamide, 0.2 part by weight of antistatic agent vegetable glyceride, 1 part by weight of flame retardant antimony trioxide, 0.1 part by weight of antioxidant DSTP 0.1 parts by weight of cobalt blue material were uniformly dispersed in a high-speed mixer, the temperature of the high-speed mixer was set to 80°C, and the rotational speed was controlled at 600rpm; fed into a 65-type co-rotating twin-screw extruder with an aspect ratio of 45, The twin-screw extruder is equipped with five stages of temperature control,
  • step S2 the semi-dry gel thing 12kg, hexahydrate zinc nitrate 3kg, silver nitrate 3kg, deionized water 50kg obtained in step S1 are mixed and stirred, then add 3kg solid content at 40% (wt) polytetrafluoroethylene emulsion, After the dispersion is uniform, it is sent to a centrifugal spray dryer, and the dispersion liquid is dispersed and sprayed in a mist form under the centrifugal action by high-speed rotation at 25,000 rpm. It enters the drying chamber and contacts with hot air for rapid drying, and is collected by a cyclone separator to obtain a composite antibacterial agent. ;
  • step S3 the composite antibacterial agent, zinc tungstate, and white oil obtained in step S2 are prepared as a slurry with a mass ratio of 8: 2: 60, take 10kg of the slurry, and put it in an NT-V10S type dual-power centrifugal nano-sand mill (Dongguan, Dongguan). Equipment of Langling Machinery Co., Ltd.), grind 4h with 0.03mm zirconia as the grinding medium, and centrifuge to obtain nanocomposite antibacterial agent;
  • step S4 adding 5 parts by weight of the nanocomposite antibacterial agent obtained in step S3 to 5 parts by weight of molten 58# paraffin, ultrasonically dispersed for 10min, then mixed with 65 parts by weight of polypropylene K7726H, 15 parts by weight of high-density polyethylene HDPE8050, and a particle size of 10 ⁇ m 8 parts by weight of talc inorganic filler, 0.5 part by weight of dispersant ethylene bis-stearamide, 0.2 part by weight of antistatic agent glyceryl monostearate, 2 parts by weight of flame retardant aluminum hydroxide, 1680.1 parts by weight of antioxidant 0.1 parts by weight of cobalt blue material were uniformly dispersed in a high-speed mixer, the temperature of the high-speed mixer was set to 100 °C, and the rotational speed was controlled at 600 rpm; The twin-screw extruder is set with five stages of temperature control, from feeding to discharging: the first stage is 150°C, the second stage is 180
  • step S2 the semi-dry gel thing 10kg, the hexahydrate zinc nitrate 3kg, the silver nitrate 1kg, the deionized water 30kg that step S1 obtains are mixed and stirred, send into the centrifugal spray dryer, by the high-speed rotation of 25000rpm, make the dispersion liquid in the centrifugal effect It is dispersed and sprayed in the form of mist, enters the drying chamber and contacts with hot air for rapid drying, and is collected by the cyclone to obtain the composite antibacterial agent;
  • step S3 the composite antibacterial agent, zinc tungstate, and white oil obtained in step S2 are prepared as a slurry with a mass ratio of 8: 1: 40, take 10kg of the slurry, and put it in an NT-V10S type dual-power centrifugal nano-sand mill (Dongguan). Equipment of Langling Machinery Co., Ltd.), grind 2h with 0.03mm zirconia as the grinding medium, and centrifuge to obtain nanocomposite antibacterial agent;
  • step S4 adding 3 parts by weight of the nanocomposite antibacterial agent obtained in step S3 to 5 parts by weight of molten 58# paraffin, ultrasonically dispersed for 10min, then mixed with 70 parts by weight of polypropylene K7726H, 15 parts by weight of high-density polyethylene HDPE8050, and a particle size of 10 ⁇ m 5 parts by weight of talc powder, 0.5 part by weight of dispersant polyethylene wax, 0.2 part by weight of antistatic agent glycerol monostearate, 2 parts by weight of flame retardant magnesium hydroxide, 0.05 part by weight of antioxidant 1010, titanium dioxide 0.2 parts by weight of the pink masterbatch is uniformly dispersed in a high-speed mixer, the temperature of the high-speed mixer is set to 100°C, and the rotational speed is controlled at 600rpm; The extruder is set with five stages of temperature control, from feeding to discharging: the first stage is 150°C, the second stage is 170°C, the third stage is 190°
  • step S2 mixing and stirring the semi-dry gel thing 10kg, hexahydrate zinc nitrate 3kg, silver nitrate 1kg, deionized water 30kg obtained in step S1, then adding 3kg solid content at 40% (wt) polytetrafluoroethylene emulsion, After the dispersion is uniform, it is sent to a centrifugal spray dryer, and the dispersion liquid is dispersed and sprayed in a mist form under the centrifugal action by high-speed rotation at 25,000 rpm. It enters the drying chamber and contacts with hot air for rapid drying, and is collected by a cyclone separator to obtain a composite antibacterial agent. ;
  • step S3 the composite antibacterial agent and white oil obtained in step S2 are prepared as a slurry with a mass ratio of 8: 40, get 10kg of slurry, in an NT-V10S type dual-power centrifugal nano-sand mill (Dongguan Langling Machinery Co., Ltd.'s equipment), grind 2h with 0.03mm zirconia as the grinding medium, and centrifuge to obtain nanocomposite antibacterial agent;
  • step S4 adding 3 parts by weight of the nanocomposite antibacterial agent obtained in step S3 to 5 parts by weight of molten 58# paraffin, ultrasonically dispersed for 10min, then mixed with 70 parts by weight of polypropylene K7726H, 15 parts by weight of high-density polyethylene HDPE8050, and a particle size of 10 ⁇ m 5 parts by weight of talc powder, 0.5 part by weight of dispersant polyethylene wax, 0.2 part by weight of antistatic agent glycerol monostearate, 2 parts by weight of flame retardant magnesium hydroxide, 0.05 part by weight of antioxidant 1010, titanium dioxide 0.2 parts by weight of the pink masterbatch is uniformly dispersed in a high-speed mixer, the temperature of the high-speed mixer is set to 100°C, and the rotational speed is controlled at 600rpm; The extruder is set with five stages of temperature control, from feeding to discharging: the first stage is 150°C, the second stage is 170°C, the third stage is 190°
  • step S2 mixing and stirring the semi-dry gel thing 10kg, hexahydrate zinc nitrate 3kg, silver nitrate 1kg, deionized water 30kg obtained in step S1, then adding 3kg solid content at 40% (wt) polytetrafluoroethylene emulsion, After the dispersion is uniform, it is sent to a centrifugal spray dryer, and the dispersion liquid is dispersed and sprayed in a mist form under the centrifugal action by high-speed rotation at 25,000 rpm. It enters the drying chamber and contacts with hot air for rapid drying, and is collected by a cyclone separator to obtain a composite antibacterial agent. ;
  • step S3 the composite antibacterial agent, zinc tungstate and white oil obtained in step S2 are prepared into a slurry with a mass ratio of 8:1:40, take 10kg of the slurry, ball mill in a ball mill for 2h, and centrifuge to obtain a composite antibacterial agent;
  • step S4 adding 3 parts by weight of the composite antibacterial agent obtained in step S3 into 5 parts by weight of molten 58# paraffin, ultrasonically dispersed for 10min, then mixed with 70 parts by weight of polypropylene K7726H, 15 parts by weight of high-density polyethylene HDPE8050, and a particle size of 10 ⁇ m 5 parts by weight of talc, 0.5 part by weight of dispersant polyethylene wax, 0.2 part by weight of antistatic agent glyceryl monostearate, 2 parts by weight of flame retardant magnesium hydroxide, 0.05 part by weight of antioxidant 1010, titanium white pink 0.2 parts by weight of the masterbatch is uniformly dispersed in a high-speed mixer, the temperature of the high-speed mixer is set to 100 ° C, and the rotational speed is controlled at 600 rpm; Five stages of temperature control are set at the discharge machine, from feeding to discharging: the first stage is 150°C, the second stage is 170°C, the third stage is 190°C, the
  • Comparative example 3 did not use a sand mill to grind into nanometer-level composite antibacterial agent.
  • the composite antibacterial agent after ball milling was micron level, and the interface was less when used in plastics.
  • the antibacterial performance of the same amount of antibacterial agent in plastics was obvious. difference.
  • the plastic granules obtained in Examples 1-3 and Comparative Examples 1-3 were injection-molded to prepare a flat test sample.
  • the injection molding process was: barrel temperature 200 °C, nozzle 190 °C, screw speed 120 RPM, to obtain a flat test sample, cut It is a standard 50mm ⁇ 50mm sheet for antibacterial testing. Each sample was boiled in the oil-water mixture for 15 min to test the antibacterial properties before and after boiling.
  • Antibacterial performance test method of antibacterial plastics use the film method, and calculate the antibacterial rate of Staphylococcus aureus and Escherichia coli through blank control.
  • the bacteria are evenly contacted with the sample by the method of sticking a film, after 48h of culture, the number of viable bacteria in the sample is measured, and the antibacterial rate of the sample is calculated.
  • the antibacterial rate is shown in Table 1.
  • the samples prepared from the antibacterial plastic of the present invention have good antibacterial properties, and the antibacterial agent is not lost after being boiled in the oil-water mixture. sex.
  • Comparative Example 1 because the antibacterial agent was not treated with polytetrafluoroethylene, the grease adhered to the plastic, and the antibacterial anions and zinc ions were lost, which affected the antibacterial effect.

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  • Health & Medical Sciences (AREA)
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Abstract

L'invention appartient au domaine technique des plastiques fonctionnels et se rapporte en particulier à des particules de plastique nanométriques antibactériennes et antisalissure pour tables et chaises et à un procédé de préparation. En particulier : le procédé consiste tout d'abord, à préfabriquer un agent antibactérien nanocomposite et à charger des ions argent et des ions zinc dans les nanopores d'un gel de silice hydrolysé par du méthyl silicate de sodium, à traiter ce dernier à l'aide d'une émulsion de polytétrafluoroéthylène et à obtenir un agent antibactérien nanocomposite au moyen d'un séchage par pulvérisation centrifuge et d'un broyage au sable. L'agent antibactérien nanocomposite présente à la fois des propriétés antibactériennes et des propriétés hydrophobes, autonettoyantes. L'agent antibactérien nanocomposite, le polypropylène, le polyéthylène haute densité et analogues sont en outre granulés pour obtenir des particules plastiques antibactériennes et antisalissure pour des tables et des chaises. En outre, du tungstate de zinc est mélangé dans l'agent antibactérien nanocomposite. La présente invention vise mieux les exigences de performance de base de tables et de chaises en plastique et, au moyen d'une formule raisonnable, prépare en coopération des particules plastiques antibactériennes et antisalissure nanométriques pour des tables et des chaises. Après la préparation d'un produit plastique antibactérien, l'agent antibactérien nanocomposite fournit des fonctions antibactériennes, antisalissure et autonettoyantes dans un produit et présente des propriétés antibactériennes stables et durables.
PCT/CN2021/083305 2020-07-25 2021-03-26 Particules de plastique nanométriques antibactériennes et antisalissure pour tables et chaises et procédé de préparation Ceased WO2022021908A1 (fr)

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CN115521592A (zh) * 2022-11-15 2022-12-27 福州大学 一种高效抗菌聚对苯二甲酸乙二醇酯复合材料及其制备方法
CN115651330A (zh) * 2022-11-08 2023-01-31 上海新上化高分子材料有限公司 一种抗菌pvc材料及其制备方法
CN116355415A (zh) * 2023-03-14 2023-06-30 东莞市好印象实业有限公司 一种婴幼儿用硅胶及其制备方法
CN116410532A (zh) * 2023-04-04 2023-07-11 康命源（贵州）科技发展有限公司 一种改性高密度聚乙烯管及其生产工艺
CN116813996A (zh) * 2022-11-16 2023-09-29 山东吉成橡塑有限公司 一种瑜伽柱及其制备方法
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CN116891606A (zh) * 2023-09-11 2023-10-17 汕头市贝斯特科技有限公司 一种聚丙烯薄膜用抗菌防雾母料及其制备方法
CN116903967A (zh) * 2023-08-30 2023-10-20 成都天佑晶创科技有限公司 一种高效抗菌颗粒及其制备方法
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CN121226899A (zh) * 2025-09-15 2025-12-30 扬州博恒新能源材料科技有限公司 一种高结合强度、阻燃型复合集流体基膜及其制备方法

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CN115232473A (zh) * 2022-08-24 2022-10-25 重庆晟淦新材料科技有限公司 一种抗菌耐腐蚀的pps复合材料及其制备方法
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CN115521592B (zh) * 2022-11-15 2023-09-22 福州大学 一种高效抗菌聚对苯二甲酸乙二醇酯复合材料及其制备方法
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CN116410532A (zh) * 2023-04-04 2023-07-11 康命源（贵州）科技发展有限公司 一种改性高密度聚乙烯管及其生产工艺
CN116903967A (zh) * 2023-08-30 2023-10-20 成都天佑晶创科技有限公司 一种高效抗菌颗粒及其制备方法
CN116891606A (zh) * 2023-09-11 2023-10-17 汕头市贝斯特科技有限公司 一种聚丙烯薄膜用抗菌防雾母料及其制备方法
CN116891606B (zh) * 2023-09-11 2023-12-12 汕头市贝斯特科技有限公司 一种聚丙烯薄膜用抗菌防雾母料及其制备方法
CN118308009A (zh) * 2024-04-24 2024-07-09 开封市睿智新材料科技有限责任公司 一种用于mdf的净醛粉末涂料及其制备方法和应用
CN118308009B (zh) * 2024-04-24 2025-01-03 开封市睿智新材料科技有限责任公司 一种用于mdf的净醛粉末涂料及其制备方法和应用
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