Wear-resistant anti-aging composite material for cable wrapping tape and preparation method thereof

Abstract

The invention relates to a wear-resistant anti-aging composite material for a cable wrapping tape and a preparation method thereof, and belongs to the technical field of high polymer materials, the wear-resistant anti-aging composite material comprises the following raw materials: 55-65 parts of polypropylene, 25-35 parts of ethylene-vinyl acetate copolymer, 15-20 parts of a modified reinforcing material, 2-4 parts of a plasticizer, 5-7 parts of a flame retardant, 3-5 parts of a lubricant and 6-8 parts of a reinforcing agent; according to the technical scheme, the wear-resistant compound is obtained by combining the modified nano material with the silane coupling agent; combining the wear-resistant compound with the anti-aging compound to obtain a reinforced material; combining the reinforcing material with the modified compatilizer to obtain a modified reinforcing material; polypropylene, an ethylene-vinyl acetate copolymer, the modified reinforcing material, a plasticizer, a flame retardant, a lubricant and a reinforcing agent are mixed and extruded through a double-screw extruder, and the wear-resistant anti-aging composite material for the cable wrapping tape is obtained. The ageing resistance, the wear resistance and the mechanical performance of the composite material are integrally improved, and the comprehensive performance is good.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a wear-resistant and anti-aging composite material for cable tape and a preparation method thereof. Background Art

[0002] Cable tapes are an indispensable part of power transmission and communication systems. They are mainly used to protect cables from external environmental factors and ensure long-term stable operation of cables. The materials of cable tapes usually include plastics, rubber, fibers, etc. These materials not only need to have good mechanical strength to resist external physical damage, but also need to have excellent anti-aging properties to resist damage to cables caused by natural conditions such as ultraviolet rays, moisture, and temperature changes. In order to further improve the performance of cable tapes, especially to extend their service life and adapt to more harsh working environments, wear-resistant and anti-aging composite materials are introduced into the design of cable tapes. Although wear-resistant and anti-aging composite materials bring many advantages to cable tapes, there are also some challenges and limitations.

[0003] In the prior art, traditional wear-resistant and anti-aging composite materials for cable tapes are mostly made of polypropylene as raw material. Although polypropylene has the characteristics of chemical corrosion resistance, electrical insulation, non-toxicity, and low price, its anti-aging and wear resistance are poor. By adding a large amount of anti-aging agents (such as antioxidants, light stabilizers, etc.) and wear-resistant fillers (such as nano-silica, carbon nanotubes, etc.) to polypropylene to enhance its anti-aging and wear resistance, it not only increases the production cost, but also easily leads to a decrease in the mechanical properties of polypropylene. In addition, these additives are prone to agglomeration and poor compatibility with the matrix, thereby affecting the overall performance of the composite material. Summary of the invention

[0004] The object of the present invention is to provide a wear-resistant and anti-aging composite material for cable tape and a preparation method thereof, wherein a wear-resistant composite material is obtained by combining a modified nano material with a silane coupling agent; the wear-resistant composite material is combined with an anti-aging compound to obtain a reinforcing material; the reinforcing material is combined with a modified compatibilizer to obtain a modified reinforcing material; polypropylene, ethylene-vinyl acetate copolymer, modified reinforcing material, plasticizer, flame retardant, lubricant and reinforcing agent are mixed and extruded through a twin-screw extruder to obtain the wear-resistant and anti-aging composite material for cable tape; the modified reinforcing material improves the anti-aging performance, wear resistance, thermal stability and mechanical properties of polypropylene, thereby improving the comprehensive performance of the wear-resistant and anti-aging composite material for cable tape as a whole and extending the service life of the cable tape.

[0005] Technical problem to be solved by the present invention: In the prior art, traditional wear-resistant and anti-aging composite materials for cable tapes are mostly made of polypropylene as raw material. Although polypropylene has the characteristics of chemical corrosion resistance, electrical insulation, non-toxicity, low price, etc., its anti-aging and wear resistance are poor; by adding a large amount of anti-aging agents (such as antioxidants, light stabilizers, etc.) and wear-resistant fillers (such as nano-silicon dioxide, carbon nanotubes, etc.) to polypropylene to enhance its aging resistance and wear resistance, not only the production cost is increased, but also the mechanical properties of polypropylene are easily reduced. In addition, these additives are prone to agglomeration and poor compatibility with the matrix, thereby affecting the overall performance of the composite material.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A wear-resistant and anti-aging composite material for cable tape, comprising the following raw materials in parts by weight: 55-65 parts of polypropylene, 25-35 parts of ethylene-vinyl acetate copolymer, 15-20 parts of modified reinforcing material, 2-4 parts of plasticizer, 5-7 parts of flame retardant, 3-5 parts of lubricant and 6-8 parts of reinforcing agent; The preparation method of the modified reinforced material comprises the following steps: S1: Wear-resistant composites are obtained by combining modified nanomaterials with silane coupling agents; S2: combining the wear-resistant compound with the anti-aging compound to obtain a reinforced material; S3: combining the reinforcing material with the modified compatibilizer to obtain a modified reinforcing material.

[0007] Furthermore, step S1 is specifically as follows: The modified nanomaterial is added to anhydrous ethanol and ultrasonically treated for 25-35 minutes to obtain a suspension, a silane coupling agent is added to anhydrous ethanol and deionized water, acetic acid is added to adjust the pH value of the solution to 4-5, and the mixture is evenly mixed to obtain a silane solution, the silane solution is added to the suspension, and then reacted at 65-75°C for 5-7h, filtered, centrifuged for 10-15min, washed with anhydrous ethanol, and finally vacuum dried at 55-65°C to obtain a wear-resistant composite.

[0008] During the above reaction process, the surface of the modified nanomaterial has hydroxyl groups, and the silane coupling agent can produce silanol groups after hydrolysis. The silanol groups in the silane coupling agent can combine with the hydroxyl groups on the modified nanomaterial, and the silane coupling agent is grafted to the surface of the modified nanomaterial to finally obtain a wear-resistant composite.

[0009] Furthermore, the mass ratio of the modified nanomaterial to anhydrous ethanol is 0.1-0.2:40-50.

[0010] Furthermore, the mass ratio of the silane coupling agent, anhydrous ethanol and deionized water is 0.4-0.6:50-60:5-10.

[0011] Furthermore, the silane coupling agent is 3-bromopropyltrimethoxysilane.

[0012] Furthermore, the mass ratio of the silane solution to the suspension is 2:1.

[0013] Furthermore, the preparation method of the modified nanomaterial comprises the following steps: The nanomaterial is added into anhydrous ethanol and deionized water, and then stirred for 25-35 minutes to obtain a nano dispersion, graphene oxide is dispersed in ethanol, and mixed evenly to obtain a graphene oxide dispersion, the graphene oxide dispersion is added into the nano dispersion, and then stirred in a water bath at 75-85°C for 7-9 hours, cooled to room temperature, filtered, washed with deionized water, and finally vacuum dried at 45-55°C to obtain a modified nanomaterial.

[0014] In the above reaction process, the nanomaterial is loaded onto the surface of graphene oxide by a sol-gel method, thereby combining the nanomaterial with graphene oxide, and finally obtaining a modified nanomaterial.

[0015] Furthermore, the mass ratio of the nanomaterial, anhydrous ethanol and deionized water is 0.8-1.2:10-15:45-55.

[0016] Furthermore, the nano material is composed of a mixture of nano silicon carbide and nano cerium oxide in a mass ratio of 0.8-0.9:0.4-0.5.

[0017] Furthermore, the mass ratio of the graphene oxide to ethanol is 0.5-0.7:90-110.

[0018] Furthermore, the mass ratio of the nano-dispersion liquid to the graphene oxide dispersion liquid is 1:1.

[0019] Furthermore, step S2 is specifically as follows: The wear-resistant composite in step S1 is added to acetone and stirred evenly, and then the anti-aging compound and potassium carbonate are added, and then stirred and refluxed at 55-65° C. for 9-11 hours. After the reaction is completed, the mixture is filtered, the acetone is removed by rotary evaporation, and then added to ethyl acetate, washed with deionized water, and dried with anhydrous magnesium sulfate. The ethyl acetate is removed by rotary evaporation, and finally vacuum dried at 50-60° C. to obtain a reinforced material.

[0020] During the above reaction process, the silane coupling agent in the wear-resistant composite has bromine atoms, and the anti-aging composite has phenolic hydroxyl groups and carboxyl groups. The bromine atoms in the wear-resistant composite can react and combine with the phenolic hydroxyl groups in the anti-aging composite, thereby combining the wear-resistant composite and the anti-aging composite to obtain a reinforced material.

[0021] Furthermore, the mass ratio of the wear-resistant composite, acetone, anti-aging compound and potassium carbonate is 3.5-3.7:90-110:2.8-3:1.8-2.

[0022] Furthermore, the anti-aging compound is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 2-(2-hydroxy-5-benzyl) benzotriazole and ultraviolet light absorber UV-360 in a mass ratio of 0.9-1.1:0.3-0.4:0.1-0.2.

[0023] Furthermore, step S3 is specifically as follows: Add the modified compatibilizer to dimethyl sulfoxide, mix well to obtain component A, add the reinforcing material in step S2, 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide to dimethyl sulfoxide, and stir for 0.5-1h to obtain component B, add component B to component A, and then react at 55-65°C for 22-24h. After the reaction is completed, filter, wash with ethanol, and finally vacuum dry at 50-60°C to obtain a modified reinforcing material.

[0024] In the above reaction process, the modified compatibilizer has an amino group, and the anti-aging compound in the reinforcing material has a carboxyl group. The amino group in the modified compatibilizer can react and combine with the carboxyl group in the reinforcing material, combining the modified compatibilizer and the reinforcing material together to finally obtain a modified reinforcing material.

[0025] Furthermore, the mass ratio of the modified compatibilizer to dimethyl sulfoxide is 4.8-5.2:50-60.

[0026] Furthermore, the mass ratio of the reinforcing material, 1-ethyl-(3-dimethylaminopropyl)carbodiimide, N-hydroxysuccinimide and dimethyl sulfoxide is 21-22:11-12:6.5-7.5:90-110.

[0027] Furthermore, the mass ratio of component B to component A is 4:1.

[0028] Furthermore, the preparation method of the modified compatibilizer comprises the following steps: Add polypropylene to xylene, heat to 135-145°C in an oil bath and stir until completely dissolved, then lower the temperature to 115-125°C, add polar monomer and initiator, and stir for 5-10 minutes, add xylene under nitrogen atmosphere, and continue stirring for 1.5-2.5 hours. After the reaction is completed, add acetone, filter, and finally vacuum dry at 60-70°C to obtain a modified compatibilizer.

[0029] In the above reaction process, the polar monomer has a carbon-carbon double bond, and the polypropylene and the polar monomer are combined through a graft polymerization reaction under the action of an initiator, and the polar monomer is grafted onto the polypropylene to finally obtain a modified compatibilizer.

[0030] Furthermore, the mass ratio of the polypropylene, xylene, polar monomer and initiator is 24-26:180-220:4-6:0.3-0.4.

[0031] Furthermore, the polar monomer is amino (meth)acrylate.

[0032] Furthermore, the initiator is dicumyl peroxide.

[0033] A method for preparing a wear-resistant and anti-aging composite material for cable tape comprises the following steps: Weigh parts of raw materials by mass, mix polypropylene, ethylene-vinyl acetate copolymer, modified reinforcing material, plasticizer, flame retardant, lubricant and reinforcing agent, then stir at a speed of 300-500 rpm for 10-20 minutes to obtain a mixture, add the mixture into a twin-screw extruder for extrusion granulation, and finally obtain a wear-resistant and anti-aging composite material for cable tape.

[0034] Furthermore, the plasticizer is at least one of dioctyl adipate, diisodecyl phthalate, and trioctyl trimellitate.

[0035] Furthermore, the flame retardant is aluminum diethylphosphinate or triphenyl phosphate.

[0036] Furthermore, the lubricant is at least one of ethylene bisstearamide, calcium stearate, and white oil.

[0037] Furthermore, the reinforcing agent is white carbon black.

[0038] Furthermore, the operating temperature of the twin-screw extruder is 160-170° C., and the main engine speed is 400-600 rpm.

[0039] Beneficial effects of the present invention: (1) In the technical scheme of the present invention, a wear-resistant composite is obtained by combining a modified nanomaterial with a silane coupling agent; the modified nanomaterial is prepared by loading the nanomaterial on graphene oxide, and the nanomaterial is composed of a mixture of nano silicon carbide and nano cerium oxide, which have a synergistic effect and can better enhance the wear resistance and mechanical properties of polypropylene. At the same time, nano cerium oxide also has certain light stability and oxidation resistance, and can further improve the aging resistance of polypropylene. By loading the nanomaterial on graphene oxide, the dispersibility of the nanomaterial can be effectively improved to prevent its agglomeration, and the interaction between graphene oxide and the nanomaterial also increases the mechanical properties and thermal stability of polypropylene. The silane coupling agent is grafted onto the modified nanomaterial to improve the dispersibility of the modified nanomaterial. The compatibility between the wear-resistant composite and polypropylene is increased, and the silane coupling agent can provide reaction sites for subsequent reactions; the wear-resistant composite is combined with the anti-aging composite to obtain a reinforced material; wherein the anti-aging composite is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 2-(2-hydroxy-5-benzyl) benzotriazole and ultraviolet light absorber UV-360, and the three play a synergistic anti-aging role, can effectively absorb ultraviolet rays, and delay the aging process of polypropylene. The anti-aging composite is chemically combined with the wear-resistant composite to increase the binding force between the two and enhance its compatibility with polypropylene. The anti-aging composite can also provide reaction sites for subsequent reactions, further improving the aging resistance, wear resistance and mechanical properties of polypropylene.

[0040] (2) In the technical scheme of the present invention, a modified reinforcing material is obtained by combining a reinforcing material with a modified compatibilizer; the modified compatibilizer is prepared by grafting amino (meth) acrylate onto polypropylene, which can not only serve as a compatibilizer to increase the compatibility between polypropylene and the reinforcing material, but also the amino (meth) acrylate and the reinforcing material are chemically combined to enhance the binding force between the two, improve the dispersibility of the reinforcing material in polypropylene, and further enhance the aging resistance, wear resistance, thermal stability and mechanical properties of polypropylene; polypropylene, ethylene-vinyl acetate copolymer, modified reinforcing material, plasticizer, flame retardant, lubricant and reinforcing agent are mixed, extruded and granulated, and finally a wear-resistant and anti-aging composite material for cable tape is obtained, and the modified reinforcing material improves the performance of polypropylene to a great extent.

[0041] (3) In the technical scheme of the present invention, the modified nanomaterial is combined with a silane coupling agent, then combined with an anti-aging compound, and finally combined with a modified compatibilizer to obtain a modified reinforced material; polypropylene, ethylene-vinyl acetate copolymer, modified reinforced material, plasticizer, flame retardant, lubricant and reinforcing agent are mixed, and extruded and granulated to obtain a wear-resistant and anti-aging composite material for cable tape; the aging resistance, wear resistance, thermal stability and mechanical properties of the wear-resistant and anti-aging composite material are improved as a whole, and the service life of the cable tape is extended, and its comprehensive performance is good. DETAILED DESCRIPTION

[0042] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The specific parameters of the raw materials used in the present invention are as follows: Nano silicon carbide, with a particle size of 40 nm and a purity of 99.9%, was provided by Beijing Dekedaojin Technology Co., Ltd.; nano cerium oxide, with a particle size of 30 nm and a purity of 99.99%, was provided by Ningbo Luofei Nanotechnology Co., Ltd.; graphene oxide, No.: S25040, was provided by Shanghai Yuanye Biotechnology Co., Ltd.; 3-bromopropyltrimethoxysilane, CAS No.: 51826-90-5, Product No.: B875150, was provided by Shanghai MacLean Biochemical Technology Co., Ltd.; 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, CAS No.: 20170-32-5, Product No.: D808548, was provided by Shanghai MacLean Biochemical Technology Co., Ltd.; 2-(2-hydroxy-5-phenyl)propionic acid, CAS No.: 20170-32-5, Product No.: D808548, was provided by Shanghai MacLean Biochemical Technology Co., Ltd. Methyl)benzotriazole, CAS No.: 2440-22-4, product No.: H857462, provided by Shanghai MacLean Biochemical Technology Co., Ltd.; UV absorber UV-360, CAS No.: 103597-45-1, product No.: U838653, provided by Shanghai MacLean Biochemical Technology Co., Ltd.; amino (meth)acrylate, provided by Guangdong Fangxin Biotechnology Co., Ltd.; polypropylene (J340, melt flow rate of 1.4-2.2g / 10min), provided by China Yanshan Petrochemical Co., Ltd.

[0044] Example 1

[0045] The modified reinforced material is prepared by the following specific steps: S1: According to the mass ratio of modified nanomaterial to anhydrous ethanol of 0.1:40, the modified nanomaterial is added to anhydrous ethanol, and ultrasonic treatment is performed for 25 minutes (ultrasonic power is 100 W, ultrasonic frequency is 40 kHz) to obtain a suspension, according to the mass ratio of 3-bromopropyltrimethoxysilane, anhydrous ethanol and deionized water of 0.4:50:5, 3-bromopropyltrimethoxysilane is added to anhydrous ethanol and deionized water, and acetic acid is added to adjust the pH value of the solution to 4, and the silane solution is obtained after uniform mixing, according to the mass ratio of silane solution to suspension of 2:1, the silane solution is added to the suspension, and then reacted at 65°C for 5h, filtered, centrifuged at a speed of 10000rpm for 15min, washed with anhydrous ethanol 3 times (the mass of anhydrous ethanol each time is twice the mass of deionized water), and finally vacuum dried at 55°C for 24h to obtain a wear-resistant composite; The preparation method of the modified nanomaterial comprises the following steps: According to the mass ratio of nanomaterial, anhydrous ethanol and deionized water being 0.8:10:45, the nanomaterial is added into anhydrous ethanol and deionized water, and then stirred at a speed of 100 rpm for 35 minutes to obtain a nano dispersion, according to the mass ratio of graphene oxide to ethanol being 0.5:90, graphene oxide is dispersed in ethanol, and after uniform mixing, a graphene oxide dispersion is obtained, according to the mass ratio of the nano dispersion and the graphene oxide dispersion being 1:1, the graphene oxide dispersion is added into the nano dispersion, and then stirred at a speed of 100 rpm for 9 hours in a water bath at 75°C, after cooling to room temperature, filtered, washed with deionized water 3 times (the mass of the deionized water each time is 30% of the mass of the above deionized water), and finally vacuum dried at 45°C for 24 hours to obtain a modified nanomaterial, wherein the nanomaterial is composed of nano silicon carbide and nano cerium oxide mixed in a mass ratio of 0.8:0.4; S2: According to the mass ratio of wear-resistant composite, acetone, anti-aging composite and potassium carbonate of 3.5:90:2.8:1.8, the wear-resistant composite in step S1 is added to acetone and stirred evenly, and then the anti-aging composite and potassium carbonate are added, and then stirred and refluxed at 55°C for 9 hours. After the reaction is completed, the acetone is removed by rotary evaporation at 35°C, and then added to ethyl acetate (the mass of ethyl acetate is 10 times the mass of potassium carbonate), washed with deionized water (the mass of deionized water is 8 times the mass of potassium carbonate), and then dried with anhydrous magnesium sulfate. The ethyl acetate is removed by rotary evaporation at 35°C, and finally vacuum dried at 50°C for 12 hours to obtain a reinforced material, wherein the anti-aging composite is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 2-(2-hydroxy-5-benzyl) benzotriazole and ultraviolet light absorber UV-360 in a mass ratio of 0.9:0.3:0.1; S3: According to the mass ratio of the modified compatibilizer and dimethyl sulfoxide being 4.8:50, the modified compatibilizer is added to dimethyl sulfoxide, and the mixture is evenly mixed to obtain component A. According to the mass ratio of the reinforcing material, 1-ethyl-(3-dimethylaminopropyl)carbodiimide, N-hydroxysuccinimide and dimethyl sulfoxide being 21:11:6.5:90, the reinforcing material, 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide in step S2 are added to dimethyl sulfoxide, and stirred for 0.5h to obtain component B. According to the mass ratio of component B to component A being 4:1, component B is added to component A, and then reacted at 55°C for 22h. After the reaction is completed, the mixture is filtered, washed with ethanol 3 times (the mass of ethanol each time is equal to the mass of N-hydroxysuccinimide), and finally vacuum dried at 50°C for 24h to obtain a modified reinforcing material. Wherein, the preparation method of the modified compatibilizer comprises the following steps: According to the mass ratio of polypropylene, xylene, amino (meth) acrylate and diisopropylbenzene peroxide being 24:180:4:0.3, polypropylene was added to xylene, heated to 135°C in an oil bath and stirred until completely dissolved, then the temperature was lowered to 115°C, amino (meth) acrylate and diisopropylbenzene peroxide were added, and stirred for 5 minutes, xylene (xylene was 10% of the mass of the above xylene) was added under a nitrogen atmosphere, and stirring was continued for 1.5 hours. After the reaction was completed, acetone (the mass of acetone was the same as that of polypropylene) was added, filtered, and finally vacuum dried at 60°C for 48 hours to obtain a modified compatibilizer; A wear-resistant and anti-aging composite material for cable tape, comprising the following raw materials in parts by weight: 55 parts of polypropylene, 25 parts of ethylene-vinyl acetate copolymer, 15 parts of modified reinforcing material, 2 parts of dioctyl adipate, 5 parts of diethyl aluminum phosphinate, 3 parts of ethylene bisstearamide and 6 parts of white carbon black; The preparation method comprises the following steps: Weigh parts of raw materials by mass, mix polypropylene, ethylene-vinyl acetate copolymer, modified reinforcing material, dioctyl adipate, aluminum diethylphosphinate, ethylene bisstearamide and white carbon black, and then stir at a speed of 300 rpm for 20 minutes to obtain a mixture, add the mixture into a twin-screw extruder for extrusion granulation, the operating temperature of the twin-screw extruder is 160°C, the main engine speed is 400 rpm, and finally obtain a wear-resistant and anti-aging composite material for cable tape.

[0046] Example 2

[0047] The modified reinforced material is prepared by the following specific steps: S1: According to the mass ratio of modified nanomaterial to anhydrous ethanol of 0.15:45, the modified nanomaterial is added to anhydrous ethanol, and ultrasonic treatment is performed for 30 minutes (ultrasonic power is 100 W, ultrasonic frequency is 40 kHz) to obtain a suspension, according to the mass ratio of 3-bromopropyltrimethoxysilane, anhydrous ethanol and deionized water of 0.5:55:8, 3-bromopropyltrimethoxysilane is added to anhydrous ethanol and deionized water, and acetic acid is added to adjust the pH value of the solution to 4.5, and the silane solution is obtained after uniform mixing, according to the mass ratio of silane solution to suspension of 2:1, the silane solution is added to the suspension, and then reacted at 70°C for 6 hours, filtered, centrifuged at a speed of 12000 rpm for 12 minutes, washed with anhydrous ethanol 3 times (the mass of anhydrous ethanol each time is twice the mass of deionized water), and finally vacuum dried at 60°C for 24 hours to obtain a wear-resistant composite; The preparation method of the modified nanomaterial comprises the following steps: According to the mass ratio of nanomaterial, anhydrous ethanol and deionized water being 1:12:50, the nanomaterial is added into anhydrous ethanol and deionized water, and then stirred at a speed of 150 rpm for 30 minutes to obtain a nano dispersion, according to the mass ratio of graphene oxide to ethanol being 0.6:100, graphene oxide is dispersed in ethanol, and after uniform mixing, a graphene oxide dispersion is obtained, according to the mass ratio of the nano dispersion and the graphene oxide dispersion being 1:1, the graphene oxide dispersion is added into the nano dispersion, and then stirred at a speed of 150 rpm for 8 hours in a water bath at 80°C, after cooling to room temperature, filtered, washed with deionized water 3 times (the mass of the deionized water each time is 30% of the mass of the above deionized water), and finally vacuum dried at 50°C for 24 hours to obtain a modified nanomaterial, wherein the nanomaterial is composed of nano silicon carbide and nano cerium oxide mixed in a mass ratio of 0.85:0.45; S2: according to the mass ratio of wear-resistant composite, acetone, anti-aging composite and potassium carbonate of 3.6:100:2.9:1.9, the wear-resistant composite in step S1 is added to acetone and stirred evenly, and then the anti-aging composite and potassium carbonate are added, and then stirred and refluxed at 60°C for 10 hours. After the reaction is completed, the acetone is removed by rotary evaporation at 40°C, and then added to ethyl acetate (the mass of ethyl acetate is 10 times the mass of potassium carbonate), washed with deionized water (the mass of deionized water is 8 times the mass of potassium carbonate), and then dried with anhydrous magnesium sulfate. The ethyl acetate is removed by rotary evaporation at 40°C, and finally vacuum dried at 55°C for 12 hours to obtain a reinforced material, wherein the anti-aging composite is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 2-(2-hydroxy-5-benzyl) benzotriazole and ultraviolet light absorber UV-360 in a mass ratio of 1:0.35:0.15; S3: According to the mass ratio of the modified compatibilizer and dimethyl sulfoxide being 5:55, the modified compatibilizer is added to dimethyl sulfoxide, and the mixture is evenly mixed to obtain component A. According to the mass ratio of the reinforcing material, 1-ethyl-(3-dimethylaminopropyl)carbodiimide, N-hydroxysuccinimide and dimethyl sulfoxide being 21.5:11.5:7:100, the reinforcing material, 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide in step S2 are added to dimethyl sulfoxide, and stirred for 0.7h to obtain component B. According to the mass ratio of component B to component A being 4:1, component B is added to component A, and then reacted at 60°C for 23h. After the reaction is completed, the mixture is filtered, washed with ethanol 3 times (the mass of ethanol each time is equal to the mass of N-hydroxysuccinimide), and finally vacuum dried at 55°C for 24h to obtain a modified reinforcing material. Wherein, the preparation method of the modified compatibilizer comprises the following steps: According to the mass ratio of polypropylene, xylene, amino (meth) acrylate and diisopropylbenzene peroxide being 25:200:5:0.35, polypropylene was added to xylene, heated to 140°C in an oil bath and stirred until completely dissolved, then the temperature was lowered to 120°C, amino (meth) acrylate and diisopropylbenzene peroxide were added, and stirred for 8 minutes, xylene (xylene was 10% of the mass of the above xylene) was added under a nitrogen atmosphere, and stirring was continued for 2 hours. After the reaction was completed, acetone (the mass of acetone was the same as that of polypropylene) was added, filtered, and finally vacuum dried at 65°C for 48 hours to obtain a modified compatibilizer; A wear-resistant and anti-aging composite material for cable tape, comprising the following raw materials in parts by weight: 60 parts of polypropylene, 30 parts of ethylene-vinyl acetate copolymer, 17 parts of modified reinforcing material, 3 parts of diisodecyl phthalate, 6 parts of triphenyl phosphate, 4 parts of calcium stearate and 7 parts of white carbon black; The preparation method comprises the following steps: Weigh the raw materials by mass, mix polypropylene, ethylene-vinyl acetate copolymer, modified reinforcing material, diisodecyl phthalate, triphenyl phosphate, calcium stearate and white carbon black, and then stir at a speed of 400 rpm for 15 minutes to obtain a mixture, add the mixture into a twin-screw extruder for extrusion granulation, the operating temperature of the twin-screw extruder is 165°C, the main engine speed is 500 rpm, and finally obtain a wear-resistant and anti-aging composite material for cable tape.

[0048] Example 3

[0049] The modified reinforced material is prepared by the following specific steps: S1: According to the mass ratio of modified nanomaterial to anhydrous ethanol of 0.2:50, the modified nanomaterial is added to anhydrous ethanol, and ultrasonic treatment is performed for 35 minutes (ultrasonic power is 100 W, ultrasonic frequency is 40 kHz) to obtain a suspension, according to the mass ratio of 3-bromopropyltrimethoxysilane, anhydrous ethanol and deionized water of 0.6:60:10, 3-bromopropyltrimethoxysilane is added to anhydrous ethanol and deionized water, and acetic acid is added to adjust the pH value of the solution to 5, and the silane solution is obtained after uniform mixing, according to the mass ratio of silane solution to suspension of 2:1, the silane solution is added to the suspension, and then reacted at 75°C for 7 hours, filtered, centrifuged at a speed of 15000 rpm for 10 minutes, washed with anhydrous ethanol 3 times (the mass of anhydrous ethanol each time is twice the mass of deionized water), and finally vacuum dried at 65°C for 24 hours to obtain a wear-resistant composite; The preparation method of the modified nanomaterial comprises the following steps: According to the mass ratio of nanomaterial, anhydrous ethanol and deionized water being 1.2:15:55, the nanomaterial is added into anhydrous ethanol and deionized water, and then stirred at a speed of 200 rpm for 25 minutes to obtain a nano dispersion, according to the mass ratio of graphene oxide to ethanol being 0.7:110, graphene oxide is dispersed in ethanol, and after uniform mixing, a graphene oxide dispersion is obtained, according to the mass ratio of nano dispersion and graphene oxide dispersion being 1:1, the graphene oxide dispersion is added into the nano dispersion, and then stirred at a speed of 200 rpm for 7 hours in a water bath at 85°C, after cooling to room temperature, filtered, washed with deionized water 3 times (the mass of deionized water each time is 30% of the mass of the above deionized water), and finally vacuum dried at 55°C for 24 hours to obtain a modified nanomaterial, wherein the nanomaterial is composed of nano silicon carbide and nano cerium oxide mixed in a mass ratio of 0.9:0.5; S2: According to the mass ratio of wear-resistant composite, acetone, anti-aging composite and potassium carbonate of 3.7:110:3:2, the wear-resistant composite in step S1 is added to acetone and stirred evenly, and then the anti-aging composite and potassium carbonate are added, and then stirred and refluxed at 65°C for 11 hours. After the reaction is completed, the acetone is removed by rotary evaporation at 45°C, and then added to ethyl acetate (the mass of ethyl acetate is 10 times the mass of potassium carbonate), washed with deionized water (the mass of deionized water is 8 times the mass of potassium carbonate), and then dried with anhydrous magnesium sulfate. The ethyl acetate is removed by rotary evaporation at 45°C, and finally vacuum dried at 60°C for 12 hours to obtain a reinforced material, wherein the anti-aging composite is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 2-(2-hydroxy-5-benzyl) benzotriazole and ultraviolet light absorber UV-360 in a mass ratio of 1.1:0.4:0.2; S3: According to the mass ratio of the modified compatibilizer and dimethyl sulfoxide being 5.2:60, the modified compatibilizer is added to dimethyl sulfoxide, and the mixture is evenly mixed to obtain component A. According to the mass ratio of the reinforcing material, 1-ethyl-(3-dimethylaminopropyl)carbodiimide, N-hydroxysuccinimide and dimethyl sulfoxide being 22:12:7.5:110, the reinforcing material, 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide in step S2 are added to dimethyl sulfoxide, and stirred for 1 hour to obtain component B. According to the mass ratio of component B to component A being 4:1, component B is added to component A, and then reacted at 65°C for 24 hours. After the reaction is completed, the mixture is filtered, washed with ethanol 3 times (the mass of ethanol each time is equal to the mass of N-hydroxysuccinimide), and finally vacuum dried at 60°C for 24 hours to obtain a modified reinforcing material; Wherein, the preparation method of the modified compatibilizer comprises the following steps: According to the mass ratio of polypropylene, xylene, amino (meth) acrylate and diisopropylbenzene peroxide of 26:220:6:0.4, polypropylene was added to xylene, heated to 145°C in an oil bath and stirred until completely dissolved, then the temperature was lowered to 125°C, amino (meth) acrylate and diisopropylbenzene peroxide were added, and stirred for 10 minutes, xylene was added under nitrogen atmosphere (xylene was 10% of the mass of the above xylene), and stirring was continued for 2.5 hours. After the reaction was completed, acetone was added (the mass of acetone was the same as that of polypropylene), filtered, and finally vacuum dried at 70°C for 48 hours to obtain a modified compatibilizer; A wear-resistant and anti-aging composite material for cable tape, comprising the following raw materials in parts by weight: 65 parts of polypropylene, 35 parts of ethylene-vinyl acetate copolymer, 20 parts of modified reinforcing material, 4 parts of trioctyl trimellitate, 7 parts of diethyl aluminum phosphinate, 5 parts of white oil and 8 parts of white carbon black; The preparation method comprises the following steps: Weigh parts of raw materials by mass, mix polypropylene, ethylene-vinyl acetate copolymer, modified reinforcing material, trioctyl trimellitate, aluminum diethylphosphinate, white oil and white carbon black, and then stir at a speed of 500 rpm for 10 minutes to obtain a mixture, add the mixture into a twin-screw extruder for extrusion granulation, the operating temperature of the twin-screw extruder is 170°C, the main engine speed is 600 rpm, and finally obtain a wear-resistant and anti-aging composite material for cable tape.

[0050] Comparative Example 1 The difference between this comparative example and Example 3 is that when preparing the modified reinforcing material, the mass of 3-bromopropyltrimethoxysilane in step S1 is replaced by 3-aminopropyltriethoxysilane, and the remaining steps and raw materials are the same as those in Example 3; S1: According to the mass ratio of modified nanomaterial to anhydrous ethanol of 0.2:50, the modified nanomaterial is added to anhydrous ethanol, and ultrasonic treatment is carried out for 35 minutes (ultrasonic power is 100 W, ultrasonic frequency is 40 kHz) to obtain a suspension, according to the mass ratio of 3-aminopropyltriethoxysilane, anhydrous ethanol and deionized water of 0.6:60:10, 3-aminopropyltriethoxysilane is added to anhydrous ethanol and deionized water, and acetic acid is added to adjust the pH value of the solution to 5, and the silane solution is obtained after uniform mixing, according to the mass ratio of silane solution to suspension of 2:1, the silane solution is added to the suspension, and then reacted at 75°C for 7h, filtered, centrifuged at a speed of 15000rpm for 10min, washed with anhydrous ethanol 3 times (the mass of anhydrous ethanol each time is twice the mass of deionized water), and finally vacuum dried at 65°C for 24h to obtain a wear-resistant composite.

[0051] Comparative Example 2 The difference between this comparative example and Example 3 is that when preparing the modified reinforcement material, the mass of the nano material in step S1 is replaced by nano silicon carbide, and the remaining steps and raw materials are the same as those in Example 3; The preparation method of the modified nanomaterial comprises the following steps: According to the mass ratio of nano-silicon carbide, anhydrous ethanol and deionized water being 1.2:15:55, nano-silicon carbide was added to anhydrous ethanol and deionized water, and then stirred at a speed of 200 rpm for 25 minutes to obtain a nano-dispersion liquid; according to the mass ratio of graphene oxide to ethanol being 0.7:110, graphene oxide was dispersed in ethanol, and the graphene oxide dispersion liquid was obtained after uniform mixing; according to the mass ratio of nano-dispersion liquid to graphene oxide dispersion liquid being 1:1, the graphene oxide dispersion liquid was added to the nano-dispersion liquid, and then stirred at a speed of 200 rpm for 7 hours in a water bath at 85°C; after cooling to room temperature, it was filtered, washed with deionized water three times (the mass of deionized water each time was 30% of the mass of the above deionized water), and finally vacuum dried at 55°C for 24 hours to obtain a modified nanomaterial.

[0052] Comparative Example 3 The difference between this comparative example and Example 3 is that when preparing the modified reinforcement material, the mass of the nano material in step S1 is replaced by nano cerium oxide, and the remaining steps and raw materials are the same as those in Example 3; The preparation method of the modified nanomaterial comprises the following steps: According to the mass ratio of nano-cerium oxide, anhydrous ethanol and deionized water being 1.2:15:55, nano-cerium oxide was added to anhydrous ethanol and deionized water, and then stirred at a speed of 200 rpm for 25 minutes to obtain a nano-dispersion liquid; according to the mass ratio of graphene oxide to ethanol being 0.7:110, graphene oxide was dispersed in ethanol, and the graphene oxide dispersion liquid was obtained after uniform mixing; according to the mass ratio of nano-dispersion liquid to graphene oxide dispersion liquid being 1:1, the graphene oxide dispersion liquid was added to the nano-dispersion liquid, and then stirred at a speed of 200 rpm for 7 hours in a water bath at 85°C; after cooling to room temperature, it was filtered, washed with deionized water 3 times (the mass of deionized water each time was 30% of the mass of the above deionized water), and finally vacuum dried at 55°C for 24 hours to obtain a modified nanomaterial.

[0053] Comparative Example 4 The difference between this comparative example and Example 3 is that, when preparing the modified reinforcing material, the modified nanomaterial in step S1 is composed of a mixture of graphene oxide and nanomaterials, and the remaining steps and raw materials are the same as those in Example 3; S1: According to the mass ratio of modified nanomaterials to anhydrous ethanol of 0.2:50, the modified nanomaterials were added to anhydrous ethanol and ultrasonically treated for 35 min (ultrasonic power of 100 W, ultrasonic frequency of 40 kHz) to obtain a suspension. According to the mass ratio of 3-bromopropyltrimethoxysilane, anhydrous ethanol and deionized water of 0.6:60:10, 3-bromopropyltrimethoxysilane was added to anhydrous ethanol and deionized water, and acetic acid was added to adjust the pH value of the solution to 5. After mixing evenly, a silane solution was obtained. According to the mass ratio of silane solution and suspension The ratio is 2:1, the silane solution is added to the suspension, and then reacted at 75°C for 7h, filtered, centrifuged at a speed of 15000rpm for 10min, washed with anhydrous ethanol for 3 times (the mass of anhydrous ethanol each time is twice the mass of deionized water), and finally vacuum dried at 65°C for 24h to obtain a wear-resistant composite, wherein the modified nanomaterial is composed of graphene oxide and nanomaterial mixed in a mass ratio of 1:1; the nanomaterial is composed of nano-silicon carbide and nano-cerium oxide mixed in a mass ratio of 0.8-0.9:0.4-0.5.

[0054] Comparative Example 5 The difference between this comparative example and Example 3 is that when preparing the modified reinforced material, the anti-aging compound in step S2 is composed of a mixture of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid and 2-(2-hydroxy-5-benzyl)benzotriazole, and the remaining steps and raw materials are the same as those in Example 3; S2: According to the mass ratio of wear-resistant composite, acetone, anti-aging composite and potassium carbonate of 3.7:110:3:2, the wear-resistant composite in step S1 is added to acetone and stirred evenly, and then the anti-aging composite and potassium carbonate are added, and then the reaction is stirred and refluxed at 65°C for 11 hours. After the reaction is completed, the acetone is removed by rotary evaporation at 45°C, and then added to ethyl acetate (the mass of ethyl acetate is 10 times the mass of potassium carbonate), washed with deionized water (the mass of deionized water is 8 times the mass of potassium carbonate), and then dried with anhydrous magnesium sulfate. The ethyl acetate is removed by rotary evaporation at 45°C, and finally vacuum dried at 60°C for 12 hours to obtain a reinforced material, wherein the anti-aging composite is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid and 2-(2-hydroxy-5-benzyl)benzotriazole in a mass ratio of 1.1:0.6.

[0055] Comparative Example 6 The difference between this comparative example and Example 3 is that when preparing the modified reinforcing material, the anti-aging compound in step S2 is composed of a mixture of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid and an ultraviolet light absorber UV-360, and the remaining steps and raw materials are the same as those in Example 3; S2: According to the mass ratio of wear-resistant composite, acetone, anti-aging composite and potassium carbonate of 3.7:110:3:2, the wear-resistant composite in step S1 is added to acetone and stirred evenly, and then the anti-aging composite and potassium carbonate are added, and then the reaction is stirred and refluxed at 65°C for 11 hours. After the reaction is completed, the acetone is removed by rotary evaporation at 45°C, and then added to ethyl acetate (the mass of ethyl acetate is 10 times the mass of potassium carbonate), washed with deionized water (the mass of deionized water is 8 times the mass of potassium carbonate), and then dried with anhydrous magnesium sulfate. The ethyl acetate is removed by rotary evaporation at 45°C, and finally vacuum dried at 60°C for 12 hours to obtain a reinforced material, wherein the anti-aging composite is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and ultraviolet light absorber UV-360 mixed in a mass ratio of 1.1:0.6.

[0056] Comparative Example 7 The difference between this comparative example and Example 3 is that when preparing the modified reinforcing material, the anti-aging compound in step S2 is composed of a mixture of 2-(2-hydroxy-5-benzyl)benzotriazole and an ultraviolet light absorber UV-360, and the remaining steps and raw materials are the same as those in Example 3; S2: According to the mass ratio of wear-resistant composite, acetone, anti-aging composite and potassium carbonate of 3.7:110:3:2, the wear-resistant composite in step S1 is added to acetone and stirred evenly, and then the anti-aging composite and potassium carbonate are added, and then the reaction is stirred and refluxed at 65°C for 11 hours. After the reaction is completed, the acetone is removed by rotary evaporation at 45°C, and then added to ethyl acetate (the mass of ethyl acetate is 10 times the mass of potassium carbonate), washed with deionized water (the mass of deionized water is 8 times the mass of potassium carbonate), and then dried with anhydrous magnesium sulfate. The ethyl acetate is removed by rotary evaporation at 45°C, and finally vacuum dried at 60°C for 12 hours to obtain a reinforced material, wherein the anti-aging composite is composed of 2-(2-hydroxy-5-benzyl)benzotriazole and ultraviolet light absorber UV-360 mixed in a mass ratio of 1.1:0.6.

[0057] Comparative Example 8 The difference between this comparative example and Example 3 is that when preparing the modified reinforcing material, the amino (meth) acrylate in step S3 is replaced by glycidyl methacrylate, and the remaining steps and raw materials are the same as those in Example 3; The preparation method of the modified compatibilizer comprises the following steps: According to the mass ratio of polypropylene, xylene, glycidyl methacrylate and diisopropylbenzene peroxide of 26:220:6:0.4, polypropylene was added to xylene, heated to 145°C in an oil bath and stirred until completely dissolved, then the temperature was lowered to 125°C, glycidyl methacrylate and diisopropylbenzene peroxide were added, and stirred for 10 minutes, xylene was added under nitrogen atmosphere (xylene was 10% of the mass of the above-mentioned xylene), and stirring was continued for 2.5 hours. After the reaction was completed, acetone was added (the mass of acetone was equal to that of polypropylene), filtered, and finally vacuum dried at 70°C for 48 hours to obtain a modified compatibilizer.

[0058] Comparative Example 9 The difference between this comparative example and Example 3 is that when preparing the modified reinforcing material, the modified compatibilizer in step S3 is directly mixed with the reinforcing material, and the remaining steps and raw materials are the same as those in Example 3; S3: According to the mass ratio of the modified compatibilizer and dimethyl sulfoxide being 5.2:60, the modified compatibilizer is added to dimethyl sulfoxide, and the mixture is mixed evenly to obtain component A. According to the mass ratio of the reinforcing material and dimethyl sulfoxide being 22:110, the reinforcing material in step S2 is added to dimethyl sulfoxide, and stirred for 1 hour to obtain component B. According to the mass ratio of component B to component A being 4:1, component B is added to component A, and then stirred at 65°C for 24 hours. The mixture is filtered, washed with ethanol three times (the mass of ethanol each time is 50% of the mass of the reinforcing material), and finally dried in vacuo at 60°C for 24 hours to obtain the modified reinforcing material.

[0059] The wear-resistant and anti-aging composite materials for cable tapes prepared in Examples 1-3 and Comparative Examples 1-9 were tested for mechanical properties, wear resistance and aging resistance; the tensile strength and elongation at break were tested according to GB / T 1040.3-2006, using a WDW-20G universal mechanical testing machine with a tensile rate of 10 mm / min, and the mechanical properties were characterized by tensile strength and elongation at break; the wear resistance was tested according to GB / T 3960-2016 "Plastic Sliding Friction and Wear Test Method", the smaller the wear mass, the better the wear resistance, and the larger the wear mass, the worse the wear resistance; the aging resistance was tested according to GB / T 2951-2008; the test results are shown in Table 1 below: Table 1 Performance parameters of wear-resistant and anti-aging composite materials for cable tapes prepared in Examples 1-3 and Comparative Examples 1-9

[0060] It can be seen from the data in Table 1 above that, by comparing Comparative Examples 1-4 with Example 3, the mass of 3-bromopropyltrimethoxysilane in step S1 is replaced with 3-aminopropyltriethoxysilane; or the mass of the nanomaterial in step S1 is replaced with nano silicon carbide or nano cerium oxide; or the modified nanomaterial in step S1 is composed of a mixture of graphene oxide and nanomaterials, and the wear-resistant and anti-aging composite material for cable tape is prepared. The test result is poorer than that of Example 3, indicating that the combination of 3-bromopropyltrimethoxysilane and modified nanomaterials can better improve the binding force between the two and improve the dispersibility of the modified nanomaterials; the nanomaterial composed of a mixture of nano silicon carbide and nano cerium oxide has a synergistic effect, which can effectively improve the wear resistance and mechanical properties of polypropylene; the nanomaterial is loaded on graphene oxide, which can enhance the dispersibility of the nanomaterial, prevent its agglomeration, and further improve the wear resistance, anti-aging performance and mechanical properties of the composite material; By comparing Comparative Examples 5-7 with Example 3, it can be seen that the anti-aging compound in step S2 is composed of a mixture of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid and 2-(2-hydroxy-5-benzyl)benzotriazole, or the anti-aging compound in step S2 is composed of a mixture of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid and an ultraviolet light absorber UV-360, and the anti-aging compound in step S2 is composed of a mixture of 2-(2-hydroxy-5-benzyl)benzotriazole and an ultraviolet light absorber UV-360. Finally, a wear-resistant and anti-aging composite material for cable tape was prepared. The test result was poorer than that of Example 3, indicating that the anti-aging compound composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, 2-(2-hydroxy-5-benzyl)benzotriazole and ultraviolet light absorber UV-360 had a good synergistic effect among the three, which could effectively improve the anti-aging performance of polypropylene and provide reaction sites for subsequent reactions, thereby further improving the aging resistance, wear resistance, thermal stability and mechanical properties of the composite material. By comparing Comparative Examples 8-9 with Example 3, it can be seen that the amino (meth) acrylate and other qualities in step S3 are replaced by glycidyl methacrylate, or the modified compatibilizer in step S3 is directly mixed with the reinforcing material to finally prepare the wear-resistant and anti-aging composite material for cable tape. The test results are worse than those in Example 3, indicating that the modified compatibilizer prepared by combining amino (meth) acrylate with polypropylene can better improve the compatibility between polypropylene and the reinforcing material, and the amino (meth) acrylate is chemically combined with the reinforcing material to increase the bonding force between polypropylene and the reinforcing material, thereby further improving the aging resistance, wear resistance, thermal stability and mechanical properties of the composite material.

[0061] It can be seen from Table 1 above that the wear-resistant and aging-resistant composite materials for cable tapes prepared in Examples 1-3 are compared with the wear-resistant and aging-resistant composite materials for cable tapes prepared in Comparative Examples 1-9. The modified nanomaterials are combined with a silane coupling agent, and then combined with an anti-aging compound, and finally combined with a modified compatibilizer to obtain a modified reinforced material. Polypropylene, ethylene-vinyl acetate copolymer, modified reinforcing material, plasticizer, flame retardant, lubricant and reinforcing agent are mixed and extruded through a twin-screw extruder to obtain a wear-resistant and aging-resistant composite material for cable tape, which meets the test performance requirements. The wear-resistant and aging-resistant composite materials for cable tapes prepared in Comparative Examples 1-9 do not meet the performance requirements. The wear-resistant and aging-resistant composite materials for cable tapes prepared by the present invention not only have good anti-aging performance, wear resistance, thermal stability and mechanical properties, but also extend the service life of the cable tape, and have good comprehensive performance.

[0062] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A wear-resistant and anti-aging composite material for cable tape, characterized in that: The invention comprises the following raw materials in parts by weight: 55-65 parts of polypropylene, 25-35 parts of ethylene-vinyl acetate copolymer, 15-20 parts of modified reinforcing material, 2-4 parts of plasticizer, 5-7 parts of flame retardant, 3-5 parts of lubricant and 6-8 parts of reinforcing agent; The preparation method of the modified reinforced material comprises the following steps: S1: Wear-resistant composites are obtained by combining modified nanomaterials with silane coupling agents; S2: combining the wear-resistant compound with the anti-aging compound to obtain a reinforced material; S3: combining the reinforcing material with the modified compatibilizer to obtain a modified reinforcing material; The preparation method of the modified compatibilizer comprises the following steps: Add polypropylene to xylene, heat to 135-145°C in an oil bath and stir until completely dissolved, then lower the temperature to 115-125°C, add polar monomer and initiator, and stir for 5-10 minutes, add xylene under nitrogen atmosphere, and continue stirring for 1.5-2.5 hours. After the reaction is completed, add acetone, filter, and finally vacuum dry at 60-70°C to obtain a modified compatibilizer; The polar monomer is amino (meth) acrylate.

2. The wear-resistant and anti-aging composite material for cable tape according to claim 1, characterized in that: Step S1 is specifically as follows: The modified nanomaterial is added to anhydrous ethanol and ultrasonically treated for 25-35 minutes to obtain a suspension, a silane coupling agent is added to anhydrous ethanol and deionized water, acetic acid is added to adjust the pH value of the solution to 4-5, and the mixture is evenly mixed to obtain a silane solution, the silane solution is added to the suspension, and then reacted at 65-75°C for 5-7h, filtered, centrifuged for 10-15min, washed with anhydrous ethanol, and finally vacuum dried at 55-65°C to obtain a wear-resistant composite.

3. The wear-resistant and anti-aging composite material for cable tape according to claim 2, characterized in that: The preparation method of the modified nanomaterial comprises the following steps: The nanomaterial is added into anhydrous ethanol and deionized water, and then stirred for 25-35 minutes to obtain a nano dispersion, graphene oxide is dispersed in ethanol, and mixed evenly to obtain a graphene oxide dispersion, the graphene oxide dispersion is added into the nano dispersion, and then stirred in a water bath at 75-85°C for 7-9 hours, cooled to room temperature, filtered, washed with deionized water, and finally vacuum dried at 45-55°C to obtain a modified nanomaterial.

4. The wear-resistant and anti-aging composite material for cable tape according to claim 3, characterized in that: The nano material is composed of nano silicon carbide and nano cerium oxide mixed in a mass ratio of 0.8-0.9:0.4-0.

5.

5. The wear-resistant and anti-aging composite material for cable tape according to claim 1, characterized in that: Step S2 is specifically as follows: The wear-resistant composite in step S1 is added to acetone and stirred evenly, and then the anti-aging compound and potassium carbonate are added, and then stirred and refluxed at 55-65° C. for 9-11 hours. After the reaction is completed, the mixture is filtered, the acetone is removed by rotary evaporation, and then added to ethyl acetate, washed with deionized water, and dried with anhydrous magnesium sulfate. The ethyl acetate is removed by rotary evaporation, and finally vacuum dried at 50-60° C. to obtain a reinforced material.

6. The wear-resistant and anti-aging composite material for cable tape according to claim 5, characterized in that: The anti-aging compound is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 2-(2-hydroxy-5-benzyl) benzotriazole and ultraviolet light absorber UV-360 in a mass ratio of 0.9-1.1:0.3-0.4:0.1-0.

2.

7. The wear-resistant and anti-aging composite material for cable tape according to claim 1, characterized in that: Step S3 is specifically as follows: Add the modified compatibilizer to dimethyl sulfoxide, mix well to obtain component A, add the reinforcing material in step S2, 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide to dimethyl sulfoxide, and stir for 0.5-1h to obtain component B, add component B to component A, and then react at 55-65°C for 22-24h. After the reaction is completed, filter, wash with ethanol, and finally vacuum dry at 50-60°C to obtain a modified reinforcing material.

8. A method for preparing the wear-resistant and anti-aging composite material for cable tape according to any one of claims 1 to 7, characterized in that: The following steps are involved: Weigh parts of raw materials by mass, mix polypropylene, ethylene-vinyl acetate copolymer, modified reinforcing material, plasticizer, flame retardant, lubricant and reinforcing agent, then stir at a speed of 300-500 rpm for 10-20 minutes to obtain a mixture, add the mixture into a twin-screw extruder for extrusion granulation, and finally obtain a wear-resistant and anti-aging composite material for cable tape.

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