High-wear-resistance composite plastic and preparation method thereof

Abstract

The invention relates to the technical field of materials, in particular to high-wear-resistance composite plastic and a preparation method thereof. Comprising the following raw materials in parts by weight: 20-40 parts of PBAT, 20-40 parts of ABS, 3-5 parts of a flame retardant, 4-8 parts of a wear-resistant agent, 2-6 parts of glyceryl stearate, 1-5 parts of glass fibers, 1-3 parts of a nano antibacterial agent, 1-5 parts of a flexibilizer, 1-5 parts of a chain extender, 3-7 parts of an antioxidant, 30-50 parts of PC resin, 10-20 parts of polyphenyl ether resin and 4-8 parts of a composite filler. The wear resistance of the composite plastic is obviously improved, the composite plastic also has better flame retardance, antibacterial property and toughness, and the service life of a plastic product can be effectively prolonged; in addition, the preparation method of the high-wear-resistance composite plastic is simple to operate, convenient to control, high in production efficiency, low in production cost and suitable for large-scale production.

Description

Technical Field

[0001] The invention relates to the technical field of materials, and in particular to a highly wear-resistant composite plastic and a preparation method thereof. Background Art

[0002] Composite plastics refer to plastic products that are processed by filling, blending, reinforcing and other methods on the basis of general plastics and engineering plastics to improve their flame retardancy, strength, impact resistance, toughness and other properties. The modified plastic parts can not only achieve the strength properties of some steel materials, but also have a series of advantages such as light weight, rich colors and easy molding. Modified plastics are a plastic industry field with a wide range of involvement, high technological content and the ability to create huge economic benefits. The filling, blending and reinforcement modification of plastic modification technology is deeply involved in the raw materials and molding process of almost all plastic products, from the production of raw resins to modified plastic masterbatches of various specifications and varieties. In order to reduce the cost of plastic products and improve their functionality, plastic modification technology is indispensable.

[0003] The current modified composite plastics all have certain enhanced modifications, but with the current technology, the composite plastic products produced are not yet perfect in terms of flame retardancy and wear resistance, resulting in a low service life of plastic products and prone to safety hazards. For this reason, we propose a highly wear-resistant composite plastic and its preparation method. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a highly wear-resistant composite plastic. The wear resistance of the composite plastic is significantly improved. In addition, it has good flame retardant properties, antibacterial properties and toughness, which can effectively improve the service life of plastic products.

[0005] The object of the present invention is to provide a method for preparing a highly wear-resistant composite plastic, which has the advantages of simple operation, convenient control, high production efficiency, low production cost and is suitable for large-scale production.

[0006] The purpose of the present invention is achieved by the following technical scheme: a highly wear-resistant composite plastic, comprising the following raw materials in parts by weight: 20-40 parts of PBAT, 20-40 parts of ABS, 3-5 parts of flame retardant, 4-8 parts of wear resist, 2-6 parts of glycerol stearate, 1-5 parts of glass fiber, 1-3 parts of nano antibacterial agent, 1-5 parts of toughening agent, 1-5 parts of chain extender, 3-7 parts of antioxidant, 30-50 parts of PC resin, 10-20 parts of polyphenylene ether resin, and 4-8 parts of composite filler.

[0007] The composite plastic in the present invention is made of the above raw materials. The wear resistance of the composite plastic made of the above raw materials is significantly improved, and the composite plastic also has good flame retardant properties, antibacterial properties and toughness. By adding wear-resistant agents such as molybdenum disulfide, graphite, polytetrafluoroethylene, etc., these substances have low friction coefficient and high hardness, can form a lubricating layer on the plastic surface, reduce friction loss, and improve the wear resistance of composite plastics, making them suitable for high friction scenarios; flame retardants include potassium perfluorobutyl sulfonate, ammonium polyphosphate and other ingredients. When encountering fire, they can play a role through gas phase or condensed phase flame retardant mechanism. Some decompose to produce non-flammable gases to dilute oxygen, and some form isolation layers to hinder heat transfer and combustion spread, thereby enhancing the fire safety of materials; nano-antibacterial agents are inorganic carrier silver-zinc composite nano-antibacterial masterbatches. Silver-zinc ions can destroy bacterial cell membranes, interfere with microbial metabolic processes, and give composite plastics the ability to inhibit microbial growth and reproduction; toughening agents are composed of polyethylene wax, styrene and acrylonitrile-butadiene. They can change the stress distribution of the plastic matrix, absorb impact energy, prevent crack propagation, improve the toughness of composite plastics, and resist external impact. It is not easy to crack.

[0008] Preferably, the flame retardant is at least one of potassium perfluorobutyl sulfonate, potassium diphenyl sulfone sulfonate, ammonium polyphosphate, tricresyl phosphate, triphenyl phosphate, tolyl diphenyl phosphate, melamine polyphosphate, melamine cyanurate, magnesium hydroxide, and zinc borate.

[0009] Preferably, the wear-resistant agent is at least one of molybdenum disulfide, graphite, silicone powder, polytetrafluoroethylene, and organosiloxane polymer silicone masterbatch.

[0010] The molybdenum disulfide used in the present invention is used as a crystallizing agent to increase the crystallinity of the plastic, thereby making the composite plastic have a more wear-resistant surface; the structure of graphite is the crystal structure of mineral graphite, which is hexagonal layered. This unique chemical structure allows graphite molecules to easily slide against each other when subjected to very small friction; PTFE has a very low friction coefficient. During the friction process, PTFE molecules will form a lubricating film on the surface of the parts, providing good lubricity and wear resistance. The combined use of these additives can significantly improve the wear resistance and scratch resistance of the plastic, thereby extending the service life of the plastic product and improving its performance.

[0011] Preferably, the nano antibacterial agent is an inorganic carrier silver-zinc composite nano antibacterial masterbatch.

[0012] Preferably, the toughening agent is composed of polyethylene wax, styrene and acrylonitrile-butadiene in a mass ratio of 0.3-0.7:0.8-1.2:0.4-0.8.

[0013] The toughening agent composed of polyethylene wax, styrene and acrylonitrile-butadiene in the present invention mainly plays the role of improving the toughness and impact resistance of the plastic. This toughening agent usually belongs to the class of thermoplastic elastomers and can significantly improve the impact strength and toughness of the plastic while maintaining other properties of the plastic.

[0014] Preferably, the chain extender is at least one of diisocyanate, hexamethylene diisocyanate, 2,2-bis(2-oxazoline), 1,3-phenyl-bis(2-oxazoline), and 1,4-phenyl-bis(2-oxazoline).

[0015] The chain extension reaction in the present invention, such as diisocyanate, can react with the active groups at the ends of polymers such as PBAT and ABS to extend the molecular chain and increase the molecular weight, thereby improving the mechanical properties and melt strength of the plastic.

[0016] Preferably, the composite filler is at least one of composite microspheres, carbon fibers, graphene oxide, silica glass fibers, and nano-montmorillonite.

[0017] In the present invention, reinforcing fillers such as glass fiber and carbon fiber have physical adsorption and entanglement with the plastic matrix. The silanol groups on the surface of the glass fiber can form hydrogen bonds with the matrix. When bearing external force, the stress is transferred from the matrix to the high-strength fiber, synergistically improving the overall strength.

[0018] More preferably, the composite filler is composed of composite microspheres, carbon fibers, graphene oxide, and nano-montmorillonite in a mass ratio of 0.8-1.2:0.4-0.8:0.4-0.8:0.3-0.7.

[0019] The composite microspheres include a shell material and a core material, wherein the core material is at least one of polysiloxane, polyimide microspheres, fully vulcanized chloroprene rubber, fully vulcanized natural rubber, and fully vulcanized acrylic powder rubber; the core material is composed of polysiloxane, polyimide microspheres, and fully vulcanized chloroprene rubber in a mass ratio of 0.8-1.2:0.3-0.7:0.4-0.8. The shell material is at least one of graphene, silicon dioxide, titanium dioxide, aluminum oxide, ferric oxide, boron nitride, graphene nanosheets, and nanosilver; the shell material is composed of graphene, silicon dioxide, and aluminum oxide in a mass ratio of 0.8-1.2:0.6-1.0:0.4-0.8.

[0020] Preferably, the composite microspheres are prepared by the following method: weighing 0.1-0.3 parts of triethanolamine, 3-5 parts of cetyltrimethylammonium bromide, 40-60 parts of shell material and 20-30 parts of core material, and mixing and stirring the above components to obtain composite microspheres.

[0021] The polysiloxane, polyimide microspheres and fully vulcanized chloroprene rubber in the core of the composite microspheres of the present invention can absorb energy, and the graphene, silicon dioxide and aluminum oxide in the outer shell can improve the compatibility with the matrix, and the internal and external synergy can optimize the comprehensive performance of the material. Specifically, the carbon fiber used has ultra-high strength and modulus, which can significantly improve the tensile and bending strength of the composite plastic; the nano-montmorillonite layer structure can play a physical barrier and reinforcement role, disperse stress, and make the composite plastic more impact-resistant. Graphene oxide also assists in enhancing the overall rigidity and toughness due to its own high-strength two-dimensional structure; polyimide microspheres and polysiloxanes have excellent thermal stability themselves. After being integrated into the composite plastic, their use temperature range can be widened, reducing the risk of deformation and degradation at high temperatures; the high thermal conductivity of graphene oxide and graphene is conducive to the rapid conduction and dissipation of heat to avoid local overheating; the lamellar shape of nano-montmorillonite and components such as graphene and silicon dioxide can fill the internal gaps of the composite plastic, form a barrier to small molecules such as water vapor and oxygen, extend the storage period of plastic products, and reduce the permeability.

[0022] Role in composite plastics: Composite microspheres act as functional "micro units". The inner core of the composite plastics gives it flexibility and elastic recovery, while the outer shell provides hardness and wear resistance, thus regulating the overall performance at a microscopic level. During plastic processing, the evenly dispersed microspheres act as nucleating agents, refining the grains and optimizing the surface finish of plastic products. Carbon fibers act as high-strength skeletons, bearing most of the external forces, preventing crack propagation, and improving the long-term bearing capacity of composite plastics, allowing the products to be used in the field of structural parts. Graphene oxide can improve the electrical and thermal properties of plastics, and its two-dimensional planar structure also assists in the uniform dispersion of other fillers and improves the compatibility of the system. Its rich functional groups can participate in subsequent chemical modifications and expand the functions of composite plastics. Adding a small amount of nano-montmorillonite can significantly change the rheological properties of plastics, reduce melt viscosity, and facilitate processing and molding.

[0023] Preferably, the antioxidant is at least one of a hindered phenol antioxidant, a phosphite antioxidant, and a hindered amine antioxidant.

[0024] The present invention also provides a method for preparing a highly wear-resistant composite plastic, comprising the following steps:

[0025] S1. According to parts by weight, PBAT, ABS, polyphenylene ether resin and glycerol stearate are put into a reaction kettle, sealed, heated and stirred, and the heating temperature is 150-200° C. to obtain a mixture A;

[0026] S2. Grind the composite filler in a grinder according to weight, and pass it through a 200-300 mesh sieve to obtain composite filler powder;

[0027] S3, according to weight parts, PC resin, glass fiber, nano antibacterial agent, toughening agent, wear resistant agent are put into a reaction kettle, sealed, heated and stirred for 20-40 minutes, the heating temperature is 100-150°C, to obtain mixture B;

[0028] S4. Put mixture A, mixture B, composite filler powder, flame retardant, chain extender and antioxidant into a reaction kettle, seal, heat and stir, put into an extruder, extrude and cool to obtain a highly wear-resistant composite plastic.

[0029] The beneficial effects of the present invention are: the wear resistance of the composite plastic of the present invention is significantly improved, and in addition, it has good flame retardant properties, antibacterial properties and toughness, and can effectively improve the service life of plastic products.

[0030] The invention discloses a method for preparing a highly wear-resistant composite plastic. The method has the advantages of simple operation, convenient control, high production efficiency, low production cost and is suitable for large-scale production. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0032] Example 1

[0033] A highly wear-resistant composite plastic comprises the following raw materials in parts by weight: 20 parts of PBAT, 20 parts of ABS, 3 parts of flame retardant, 4 parts of wear resisting agent, 2 parts of glycerol stearate, 1 part of glass fiber, 1 part of nano antibacterial agent, 1 part of toughening agent, 1 part of chain extender, 3 parts of antioxidant, 30 parts of PC resin, 10 parts of polyphenylene ether resin and 4 parts of composite filler.

[0034] The flame retardant is potassium perfluorobutyl sulfonate. The wear-resistant agent is molybdenum disulfide.

[0035] The nano antibacterial agent is an inorganic carrier silver-zinc composite nano antibacterial masterbatch.

[0036] The toughening agent is composed of polyethylene wax, styrene and acrylonitrile-butadiene in a mass ratio of 0.3:0.8:0.4.

[0037] The chain extender is diisocyanate.

[0038] The composite filler is composed of composite microspheres, carbon fibers, graphene oxide and nano-montmorillonite in a mass ratio of 0.8:0.4:0.4:0.3.

[0039] The composite microspheres include a shell material and a core material, wherein the core material is composed of polysiloxane, polyimide microspheres and fully vulcanized chloroprene rubber in a mass ratio of 0.8:0.3:0.4. The shell material is composed of graphene, silicon dioxide and aluminum oxide in a mass ratio of 0.8:0.6:0.4.

[0040] The composite microspheres are prepared by the following method: 0.1 parts of triethanolamine, 3 parts of hexadecyltrimethylammonium bromide, 40 parts of shell material and 20 parts of core material are weighed, and the above components are mixed and stirred to obtain composite microspheres.

[0041] The antioxidant is a hindered phenol antioxidant.

[0042] The highly wear-resistant composite plastic is prepared by the following steps:

[0043] S1. According to parts by weight, PBAT, ABS, polyphenylene ether resin and glycerol stearate were put into a reaction kettle, sealed, heated and stirred, and the heating temperature was 150° C. to obtain a mixture A;

[0044] S2, according to the weight parts, put the composite filler into a grinder and grind it, and pass it through a 200 mesh sieve to obtain composite filler powder;

[0045] S3, according to weight parts, PC resin, glass fiber, nano antibacterial agent, toughening agent, and wear resistant agent were put into a reaction kettle, sealed, heated and stirred for 20 minutes, and the heating temperature was 100° C. to obtain a mixture B;

[0046] S4. Put mixture A, mixture B, composite filler powder, flame retardant, chain extender and antioxidant into a reaction kettle, seal, heat and stir, put into an extruder, extrude and cool to obtain a highly wear-resistant composite plastic.

[0047] Example 2

[0048] A highly wear-resistant composite plastic comprises the following raw materials in parts by weight: 30 parts of PBAT, 30 parts of ABS, 4 parts of flame retardant, 6 parts of wear resistance agent, 4 parts of glycerol stearate, 3 parts of glass fiber, 2 parts of nano antibacterial agent, 3 parts of toughening agent, 3 parts of chain extender, 5 parts of antioxidant, 40 parts of PC resin, 15 parts of polyphenylene ether resin and 6 parts of composite filler.

[0049] The flame retardant is potassium diphenyl sulfone sulfonate. The wear-resistant agent is silicone powder.

[0050] The nano antibacterial agent is an inorganic carrier silver-zinc composite nano antibacterial masterbatch.

[0051] The toughening agent is composed of polyethylene wax, styrene and acrylonitrile-butadiene in a mass ratio of 0.5:1.0:0.6.

[0052] The chain extender is 2,2-bis(2-oxazoline).

[0053] The composite filler is composed of composite microspheres, carbon fibers, graphene oxide and nano-montmorillonite in a mass ratio of 1.0:0.6:0.6:0.5.

[0054] The composite microspheres include a shell material and a core material, wherein the core material is composed of polysiloxane, polyimide microspheres and fully vulcanized chloroprene rubber in a mass ratio of 1.0:0.5:0.6. The shell material is composed of graphene, silicon dioxide and aluminum oxide in a mass ratio of 1.0:0.8:0.6.

[0055] The composite microspheres are prepared by the following method: 0.2 parts of triethanolamine, 4 parts of hexadecyltrimethylammonium bromide, 50 parts of shell material and 25 parts of core material are weighed, and the above components are mixed and stirred to obtain composite microspheres.

[0056] The antioxidant is a phosphite antioxidant.

[0057] The highly wear-resistant composite plastic is prepared by the following steps:

[0058] S1. According to parts by weight, PBAT, ABS, polyphenylene ether resin and glycerol stearate were added into a reaction kettle, sealed, heated and stirred at 180° C. to obtain a mixture A;

[0059] S2, according to weight parts, put the composite filler into a grinder and grind it, and pass it through a 250 mesh sieve to obtain composite filler powder;

[0060] S3, according to weight parts, PC resin, glass fiber, nano antibacterial agent, toughening agent, wear resistant agent were put into a reaction kettle, sealed, heated and stirred for 30 minutes, and the heating temperature was 130°C to obtain a mixture B;

[0061] S4. Put mixture A, mixture B, composite filler powder, flame retardant, chain extender and antioxidant into a reaction kettle, seal, heat and stir, put into an extruder, extrude and cool to obtain a highly wear-resistant composite plastic.

[0062] Example 3

[0063] A highly wear-resistant composite plastic comprises the following raw materials in parts by weight: 30 parts of PBAT, 30 parts of ABS, 4 parts of flame retardant, 6 parts of wear resistance agent, 4 parts of glycerol stearate, 4 parts of glass fiber, 2 parts of nano antibacterial agent, 3 parts of toughening agent, 2 parts of chain extender, 5 parts of antioxidant, 40 parts of PC resin, 16 parts of polyphenylene ether resin and 6 parts of composite filler.

[0064] The flame retardant is composed of potassium diphenyl sulfone sulfonate, ammonium polyphosphate and zinc borate in a mass ratio of 0.7:0.8:0.4.

[0065] The wear-resistant agent is composed of graphite and polytetrafluoroethylene in a mass ratio of 0.8:0.6.

[0066] The nano antibacterial agent is an inorganic carrier silver-zinc composite nano antibacterial masterbatch.

[0067] The toughening agent is composed of polyethylene wax, styrene and acrylonitrile-butadiene in a mass ratio of 0.5:1.0:0.6.

[0068] The chain extender is diisocyanate.

[0069] The composite filler is composed of composite microspheres, carbon fibers, graphene oxide and nano-montmorillonite in a mass ratio of 1.2:0.8:0.8:0.7.

[0070] The composite microspheres include a shell material and a core material, wherein the core material is composed of polysiloxane, polyimide microspheres and fully vulcanized chloroprene rubber in a mass ratio of 1.2:0.7:0.8. The shell material is composed of graphene, silicon dioxide and aluminum oxide in a mass ratio of 1.2:1.0:0.8.

[0071] The composite microspheres are prepared by the following method: 0.2 parts of triethanolamine, 4 parts of hexadecyltrimethylammonium bromide, 50 parts of shell material and 25 parts of core material are weighed, and the above components are mixed and stirred to obtain composite microspheres.

[0072] The antioxidant is at least one of a hindered phenol antioxidant, a phosphite antioxidant, and a hindered amine antioxidant.

[0073] The highly wear-resistant composite plastic is prepared by the following steps:

[0074] S1. According to parts by weight, PBAT, ABS, polyphenylene ether resin and glycerol stearate were added into a reaction kettle, sealed, heated and stirred at 180° C. to obtain a mixture A;

[0075] S2, according to weight parts, put the composite filler into a grinder and grind it, and pass it through a 250 mesh sieve to obtain composite filler powder;

[0076] S3, according to weight parts, PC resin, glass fiber, nano antibacterial agent, toughening agent, wear resistant agent were put into a reaction kettle, sealed, heated and stirred for 30 minutes, and the heating temperature was 130°C to obtain a mixture B;

[0077] S4. Put mixture A, mixture B, composite filler powder, flame retardant, chain extender and antioxidant into a reaction kettle, seal, heat and stir, put into an extruder, extrude and cool to obtain a highly wear-resistant composite plastic.

[0078] Example 4

[0079] A highly wear-resistant composite plastic comprises the following raw materials in parts by weight: 40 parts of PBAT, 40 parts of ABS, 5 parts of flame retardant, 8 parts of wear resistance agent, 6 parts of glycerol stearate, 5 parts of glass fiber, 3 parts of nano antibacterial agent, 5 parts of toughening agent, 5 parts of chain extender, 7 parts of antioxidant, 50 parts of PC resin, 20 parts of polyphenylene ether resin and 8 parts of composite filler.

[0080] The flame retardant is magnesium hydroxide.

[0081] The wear-resistant agent is silicone powder.

[0082] The nano antibacterial agent is an inorganic carrier silver-zinc composite nano antibacterial masterbatch.

[0083] The toughening agent is composed of polyethylene wax, styrene and acrylonitrile-butadiene in a mass ratio of 0.7:1.2:0.8.

[0084] The chain extender is 1,4-phenyl-bis(2-oxazoline).

[0085] The composite filler is composed of composite microspheres, carbon fibers, graphene oxide and nano-montmorillonite in a mass ratio of 1.2:0.8:0.8:0.7.

[0086] The composite microspheres include a shell material and a core material, wherein the core material is composed of polysiloxane, polyimide microspheres and fully vulcanized chloroprene rubber in a mass ratio of 1.2:0.7:0.8. The shell material is composed of graphene, silicon dioxide and aluminum oxide in a mass ratio of 0.8:1.0:0.7.

[0087] The composite microspheres are prepared by the following method: 0.3 parts of triethanolamine, 5 parts of hexadecyltrimethylammonium bromide, 60 parts of shell material and 30 parts of core material are weighed, and the above components are mixed and stirred to obtain composite microspheres.

[0088] The antioxidant is at least one of a hindered phenol antioxidant, a phosphite antioxidant, and a hindered amine antioxidant.

[0089] The highly wear-resistant composite plastic is prepared by the following steps:

[0090] S1. According to parts by weight, PBAT, ABS, polyphenylene ether resin and glycerol stearate were added into a reaction kettle, sealed, heated and stirred at 200° C. to obtain a mixture A;

[0091] S2. Grind the composite filler in a grinder according to weight, and pass it through a 300-mesh sieve to obtain composite filler powder;

[0092] S3, according to weight parts, PC resin, glass fiber, nano antibacterial agent, toughening agent, wear resistant agent were put into a reaction kettle, sealed, heated and stirred for 40 minutes, and the heating temperature was 150°C to obtain a mixture B;

[0093] S4. Put mixture A, mixture B, composite filler powder, flame retardant, chain extender and antioxidant into a reaction kettle, seal, heat and stir, put into an extruder, extrude and cool to obtain a highly wear-resistant composite plastic.

[0094] Comparative Example 1

[0095] The difference between this comparative example and the above-mentioned embodiment 3 is that the composite filler in the raw material of the highly wear-resistant composite plastic of this comparative example is only graphene oxide. The rest of the contents of this comparative example are the same as those of embodiment 3 and will not be repeated here.

[0096] Comparative Example 2

[0097] The difference between this comparative example and the above-mentioned Example 3 is that the composite filler used in the raw material of the highly wear-resistant composite plastic of this comparative example is composed of carbon fiber, graphene oxide, and nano-montmorillonite in a mass ratio of 0.8:0.8:0.7. The rest of the contents of this comparative example are the same as those of Example 3 and will not be repeated here.

[0098] Comparative Example 3

[0099] The difference between this comparative example and the above-mentioned Example 3 is that the toughening agent in the raw material of the highly wear-resistant composite plastic in this comparative example is only polyethylene. The rest of the contents of this comparative example are the same as those in Example 3 and will not be repeated here.

[0100] The performance of the highly wear-resistant composite plastics obtained in Example 3 and Comparative Examples 1-2 was tested after film formation. The results are shown in Table 1:

[0101] Tensile strength and elongation at break: in accordance with GB / T 1040-2006 standard;

[0102] Bending strength: in accordance with GB / T9341-2008 standard;

[0103] Flame retardancy: vertical burning performance, tested according to UL-94 vertical burning standard, 3.2mm thick specimen;

[0104] Dynamic friction coefficient reference, ASTM G133;

[0105] Antibacterial property: The above materials were molded into sheets by injection molding machine, placed overnight under natural conditions, and then tested; the antibacterial rate used Escherichia coli + Staphylococcus aureus commonly seen in the field as observation objects, and the test results are shown in Table 1:

[0106] Table 1

[0107]

[0108] It can be seen from Example 3 that the wear resistance of the high wear-resistant composite plastic prepared by the present invention is significantly improved. In addition, it also has the advantages of good flame retardancy, antibacterial properties and toughness, as well as excellent hydrophobicity and the like.

[0109] The performance of the highly wear-resistant composite plastics obtained in Example 3 and Comparative Example 3 was tested after film formation. The results are shown in Table 2:

[0110] Tensile strength and elongation at break: in accordance with GB / T 1040-2006 standard;

[0111] Dynamic friction coefficient reference, ASTM G133;

[0112] Bending strength: According to GB / T9341-2008 standard; the test results are shown in Table 2:

[0113] Table 2

[0114] project Tensile strength(MPa) Bending strength(MPa) Dynamic friction coefficient (μ) Example 2 47 55 0.21 Comparative Example 3 28 37 0.30

[0115] It can be seen from Example 3 that the wear resistance of the high wear-resistant composite plastic prepared by the present invention is significantly improved. In addition, it also has the advantages of good flame retardancy, antibacterial properties and toughness, as well as excellent hydrophobicity and the like.

[0116] From the comparison between Example 3 and Comparative Examples 1-3, it can be seen that the high wear-resistant composite plastic prepared by adding composite fillers and toughening agents to the formula under the same conditions has good wear resistance, flame retardancy, antibacterial properties and toughness, as well as excellent hydrophobicity and the like, and has broad market prospects and application value.

[0117] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A highly wear-resistant composite plastic, characterized in that: The invention comprises the following raw materials in parts by weight: 20-40 parts of PBAT, 20-40 parts of ABS, 3-5 parts of flame retardant, 4-8 parts of wear resistance agent, 2-6 parts of glycerol stearate, 1-5 parts of glass fiber, 1-3 parts of nano antibacterial agent, 1-5 parts of toughening agent, 1-5 parts of chain extender, 3-7 parts of antioxidant, 30-50 parts of PC resin, 10-20 parts of polyphenylene ether resin and 4-8 parts of composite filler.

2. A highly wear-resistant composite plastic according to claim 1, characterized in that: The flame retardant is at least one of potassium perfluorobutyl sulfonate, potassium diphenyl sulfone sulfonate, ammonium polyphosphate, tricresyl phosphate, triphenyl phosphate, tolyl diphenyl phosphate, melamine polyphosphate, melamine cyanurate, magnesium hydroxide and zinc borate.

3. The highly wear-resistant composite plastic according to claim 1, characterized in that: The wear-resistant agent is at least one of molybdenum disulfide, graphite, silicone powder, polytetrafluoroethylene, and organic siloxane polymer silicone masterbatch.

4. The highly wear-resistant composite plastic according to claim 1, characterized in that: The nano antibacterial agent is an inorganic carrier silver-zinc composite nano antibacterial masterbatch.

5. The highly wear-resistant composite plastic according to claim 1, characterized in that: The toughening agent is composed of polyethylene wax, styrene and acrylonitrile-butadiene in a mass ratio of 0.3-0.7:0.8-1.2:0.4-0.

8.

6. The highly wear-resistant composite plastic according to claim 1, characterized in that: The chain extender is at least one of diisocyanate, hexamethylene diisocyanate, 2,2-bis(2-oxazoline), 1,3-phenyl-bis(2-oxazoline), and 1,4-phenyl-bis(2-oxazoline).

7. The highly wear-resistant composite plastic according to claim 1, characterized in that: The composite filler is at least one of composite microspheres, carbon fibers, graphene oxide, silicon dioxide glass fibers, and nano-montmorillonite.

8. The highly wear-resistant composite plastic according to claim 7, characterized in that: The composite filler is composed of composite microspheres, carbon fibers, graphene oxide and nano-montmorillonite in a mass ratio of 0.8-1.2:0.4-0.8:0.4-0.8:0.3-0.

7.

9. The highly wear-resistant composite plastic according to claim 1, characterized in that: The antioxidant is at least one of a hindered phenol antioxidant, a phosphite antioxidant, and a hindered amine antioxidant.

10. A method for preparing a highly wear-resistant composite plastic according to any one of claims 1 to 9, characterized in that: The steps include: S1. According to parts by weight, PBAT, ABS, polyphenylene ether resin and glycerol stearate are put into a reaction kettle, sealed, heated and stirred, and the heating temperature is 150-200° C. to obtain a mixture A; S2. Grind the composite filler in a grinder according to weight, and pass it through a 200-300 mesh sieve to obtain composite filler powder; S3, according to weight parts, PC resin, glass fiber, nano antibacterial agent, toughening agent, wear resistant agent are put into a reaction kettle, sealed, heated and stirred for 20-40 minutes, the heating temperature is 100-150°C, to obtain mixture B; S4. Put mixture A, mixture B, composite filler powder, flame retardant, chain extender and antioxidant into a reaction kettle, seal, heat and stir, put into an extruder, extrude and cool to obtain a highly wear-resistant composite plastic.

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