Wear-resistant anti-static polyester fiber material and preparation method thereof

Abstract

The invention relates to the technical field of high polymer material compounding, in particular to a wear-resistant anti-static polyester fiber material and a preparation method thereof. The invention relates to a wear-resistant antistatic polyester fiber material, which is prepared from the following preparation raw materials in parts by mass: 80 to 90 parts of polyethylene glycol terephthalate, 5 to 7 parts of antistatic agent, 8 to 12 parts of wear-resistant agent, 6 to 8 parts of antibacterial agent, 0.5 to 1.0 part of ultraviolet light absorber, 0.3 to 0.5 part of antioxidant and 1 to 1.5 parts of coupling agent, the wear-resistant agent is hydrophobic modified nano silicon carbide. The wear-resistant anti-static polyester fiber material provided by the invention has excellent comprehensive performance, is suitable for manufacturing products such as knapsacks and the like, and can meet the requirements of the market on high-performance fiber materials.

Description

Technical Field

[0001] The present application relates to the technical field of polymer material composites, and in particular to a wear-resistant and antistatic polyester fiber material and a preparation method thereof. Background Art

[0002] With the improvement of people's living standards, people have higher and higher requirements for the quality of backpack fabrics. Fashionable, healthy, comfortable and casual backpacks are becoming more and more popular with consumers. Backpack fabrics are gradually developing towards high-end, diversified and functional directions. Fiber materials are the basic units of backpack fabrics, and the development of various functional fibers has become increasingly important.

[0003] Among various functional fibers, polyester fiber not only possesses high strength but also excellent abrasion resistance, wrinkle resistance, dimensional stability, and elastic recovery, making it widely used in textiles such as clothing and home textiles. However, pure polyester fiber products have poor moisture absorption properties and easily accumulate charge in dry climates, forming static electricity when worn and used. This generates static electricity, making it difficult to match the comfort of natural cotton fibers. Polyester materials themselves lack antibacterial and hydrophobic properties, and some people with delicate or sensitive skin may experience allergic reactions to polyester fiber fabrics. Polyester fiber also has drawbacks such as flammability and difficulty in dyeing. Summary of the Invention

[0004] The purpose of this application is to address the shortcomings of current technology and provide a wear-resistant and antistatic polyester fiber material and a preparation method thereof. The wear-resistant and antistatic polyester fiber material prepared in this application has excellent antistatic properties, wear resistance, antibacterial properties, waterproof properties, moisture absorption, breathability and weather resistance, and is widely used in backpack production.

[0005] In the first aspect, the present application provides a wear-resistant and antistatic polyester fiber material, which adopts the following technical solution: A wear-resistant and antistatic polyester fiber material comprises the following raw materials, calculated by weight: 80-90 parts of polyethylene terephthalate, 5-7 parts of an antistatic agent, 8-12 parts of an anti-wear agent, 6-8 parts of an antibacterial agent, 0.5-1.0 parts of an ultraviolet absorber, 0.3-0.5 parts of an antioxidant, and 1-1.5 parts of a coupling agent, wherein the antistatic agent is modified carbon nanotubes; and the anti-wear agent is hydrophobically modified nano-silicon carbide.

[0006] By adopting the above technical solution, polyethylene terephthalate: as the main component, provides the basic structure and properties of the fiber. Polyester fiber has good mechanical strength, wear resistance and chemical stability. Antistatic agent (modified carbon nanotubes): Utilizing the high conductivity of carbon nanotubes and the charge transfer characteristics of polydopamine, effectively improves the antistatic performance of the material and reduces the problem of static charge accumulation. At the same time, the strength and modulus of carbon nanotubes contribute to enhancing the mechanical properties of the material. Wear-resistant agent (hydrophobically modified nano-silicon carbide): By introducing a silica layer and groups such as amino and trifluoromethyl on the surface of nano-silicon carbide, endows the material with hydrophobic characteristics and wear resistance. These modified groups form chemical connections with polyester fiber, improving the wear resistance and waterproof performance of the material. Antibacterial agent: Having a biguanide structure and an azo group, has good antibacterial performance and high-temperature stability. At the same time, the carboxyl group increases the hygroscopicity of the fiber and reduces the possibility of static charge generation. Ultraviolet absorber: Protects the material from degradation or discoloration due to ultraviolet irradiation, prolonging the service life of the material. Antioxidant: Prevents the material from degrading or deteriorating due to oxidation during processing and use. Coupling agent: Helps to improve the dispersion of fillers in the polyester fiber matrix, reducing agglomeration phenomena, thus enhancing the overall performance of the material. The synergistic effect among these components is reflected in: modified carbon nanotubes and hydrophobically modified nano-silicon carbide jointly enhance the wear resistance and antistatic performance of the material; antibacterial agent and ultraviolet absorber jointly protect the material from microbial invasion and ultraviolet damage; antioxidant and coupling agent ensure the stability of the material and the uniform distribution of performance. The interaction and synergistic effect of these components make the finally prepared wear-resistant and antistatic polyester fiber material have excellent comprehensive performance, meeting the application requirements of various applications such as backpack production.

[0007] Preferably, the preparation method of the modified carbon nanotubes includes the following steps: S21. According to mass parts, place 100 parts of carbon nanotubes into a mixed acid composed of 400 parts of nitric acid with a mass concentration of 70% and 400 parts of sulfuric acid with a mass concentration of 98%, ultrasonically treat for 8 - 10 h, then cool, dilute with deionized water and filter by suction. Wash the filter cake with distilled water to obtain hydroxylated carbon nanotubes; S22. According to mass parts, add 20 parts of N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane and 2.5 parts of distilled water into a container, mix evenly at room temperature. After fully stirring at room temperature, slowly raise the temperature to 45 - 50 °C, react for 5 - 8 h to obtain a colorless transparent liquid, and dry it under vacuum to obtain amino-terminated hyperbranched polysiloxane; S23. According to mass parts, under stirring, sequentially add polydopamine, amino-terminated hyperbranched polysiloxane, and hydroxylated carbon nanotubes into ethanol, stir and mix. Finally, add ammonia water to adjust the pH of the system to 7.8, continue stirring for 2 - 3 h, and then let it stand for 6 - 7 h to obtain modified carbon nanotubes.

[0008] By adopting the above technical solution, by utilizing the high electrical conductivity of carbon nanotubes and the charge transport characteristics of polydopamine, the antistatic performance of the polyester fiber material can be effectively improved, and the problem that the existing polyester fiber is prone to generate static electricity is solved. The carbon nanotubes themselves have extremely high strength and modulus. After being grafted into the polyester fiber material, the mechanical properties of the polyester fiber material can be significantly improved, especially the breaking strength and elongation at break. Improving compatibility and dispersibility: The amino-terminated hyperbranched polysiloxane as a coupling agent helps to improve the dispersibility of carbon nanotubes in the polyester fiber matrix, reduce the agglomeration phenomenon, and at the same time increase the interfacial interaction between carbon nanotubes and polyester fibers, thereby improving the overall performance of the material.

[0009] Preferably, in step S23, the mass ratio of ethanol, polydopamine, amino-terminated hyperbranched polysiloxane and hydroxylated carbon nanotubes is 200:17:15:(90 - 100).

[0010] Preferably, the preparation method of the hydrophobic modified nano silicon carbide includes the following steps: S41. According to the mass parts, add 10 parts of nano silicon carbide with a particle size of 20 - 50 nm to 100 parts of deionized water, disperse evenly to obtain a dispersion, heat up to 85 - 90 °C, and adjust the pH of the dispersion to 9 - 10 with a 10% sodium hydroxide aqueous solution; slowly drop 5 parts of an ethanol solution of 25% orthosilicate ester into the dispersion within 1 h, carry out a sol-gel reaction for 3 h, then filter, wash three times with absolute ethanol, and dry to obtain coated nano silicon carbide; S42. According to the mass parts, add 10 parts of coated nano silicon carbide to 30 parts of an ethanol aqueous solution with a mass concentration of 75%, adjust the pH value to 4 - 5, add 0.5 part of γ-aminopropyltriethoxysilane, stir and react for 1 - 2 h, filter, wash, and dry to obtain silane-modified nano silicon carbide; S43. According to the mass parts, add 30 parts of a dimethylformamide solution of 2% trifluoroacetic anhydride and heat up to 90 °C, add 10 parts of silane-modified nano silicon carbide, and adjust the pH of the dispersion to 9 - 10 with a 15% sodium hydroxide aqueous solution, react at a constant temperature for 3 - 4 h, filter, wash, and dry to obtain hydrophobic modified nano silicon carbide.

[0011] By adopting the above technical solution, first, a silica layer is deposited on the surface of nano-silicon carbide through the sol-gel method, providing sufficient active sites for modification. Then, through the reaction of γ-aminopropyltriethoxysilane with the silanol groups on the silica surface, amino groups are introduced onto the surface of nano-silicon carbide. Subsequently, through the acylation reaction of trifluoroacetic anhydride with some amino groups, trifluoromethyl groups are introduced, endowing nano-silicon carbide with hydrophobic properties. By adding nano-silicon carbide with amino and fluorine-containing groups on the surface, among which the amino groups can react with polyethylene terephthalate to form chemical bonds, ensuring the firm connection between nano-silicon carbide and the substrate and improving the wear resistance of the polyester fiber material. The fluorine-containing groups extend outwards to form a hydrophobic layer, which can endow the polyester fiber material with waterproof performance.

[0012] Preferably, the preparation method of the antibacterial agent comprises the following steps: S51. According to the mass parts, 8.4 parts of dicyandiamide are added to 70 parts of ethanol, and 50 parts of 4-dimethylbenzeneazobenzene-4-carboxylic acid are added thereto. 5 parts of hydrochloric acid with a mass concentration of 37% are added dropwise under the condition of 110-115 °C, and the reaction is carried out for 4-5 h to obtain a mixture for standby; S52. The mixture is evaporated and then dissolved in methanol, the insoluble substances are filtered off, and the remaining liquid is evaporated, recrystallized, and filtered to obtain the antibacterial agent.

[0013] By adopting the above technical solution, the prepared antibacterial agent has a biguanide structure and has good antibacterial properties. On the one hand, guanidine is a cationic compound. Low-molecular-weight guanidine affects the growth and division of bacteria, makes spores germinate and produce respiration, and thus kills microorganisms by inhibiting cell swelling, disintegrating the cytoplasm, and destroying the cell wall, thereby achieving a good antibacterial effect; on the other hand, the antibacterial agent has an azo group. The azo group is composed of two benzene rings connected by an N=N bond and has good high-temperature stability, so that the antibacterial agent has good thermal stability. And the N=N bond in the azo molecule has relatively high energy and can absorb a certain amount of energy, making it have relatively high reactivity, thereby promoting the dyeability of polyester fibers.

[0014] Preferably, the ultraviolet absorber is ultraviolet absorber UV-1164.

[0015] Preferably, the coupling agent is composed of γ-aminopropyltriethoxysilane and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane in a mass part ratio of 4:3.

[0016] By adopting the above technical solutions, the coupling agent can improve the compatibility between different materials, enabling various additives to bind together better and form a more stable and effective composite system. The combined action of γ-aminopropyltriethoxysilane and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane can more effectively disperse the modified carbon nanotubes and wear-resistant agents, reduce the agglomeration phenomenon, and improve the uniformity of the material. γ-aminopropyltriethoxysilane and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane react with the modified carbon nanotubes, wear-resistant agents, and polyester fibers respectively through different functional groups to form more stable interfacial connections, thereby enhancing the overall mechanical properties of the material. The mixed use of the two silane coupling agents can better adjust the compatibility between different materials, making the entire composite material system more stable and efficient. In summary, the coupling agent plays a crucial role in this wear-resistant and antistatic polyester fiber material. By improving the dispersibility, enhancing the interfacial interaction, and improving the compatibility, the overall performance of the material is significantly improved.

[0017] Preferably, the antioxidant is antioxidant B900.

[0018] In a second aspect, the present application provides a method for preparing a wear-resistant and antistatic polyester fiber material, adopting the following technical solutions: As a general technical concept, the present application also provides the method for preparing the above-mentioned wear-resistant and antistatic polyester fiber material, including the following steps: S91. According to the mass parts, add each raw material in the formula to a high-speed mixer, and mix evenly at 150 - 160 °C to obtain a mixed material; S92. Feed the mixed material into a twin-screw extruder through an automatic feeding system for melt extrusion granulation, and then spin it through a melt spinning machine at a temperature of 290 - 300 °C, with the spinneret hole diameter of 0.25 mm, and control the spinning speed at 700 - 800 m / min; After spinning, perform drawing, and control the draw ratio at 3 - 4 times to obtain a fiber semi-finished product; S93. Perform plasma surface treatment on the fiber semi-finished product with a treatment power of 400 - 500 W and a time of 8 - 10 minutes to obtain the wear-resistant and antistatic polyester fiber material.

[0019] Preferably, the working temperatures of each zone of the twin-screw extruder are in turn: the temperature of the first zone is 190 - 200 °C, the temperature of the second zone is 210 - 220 °C, the temperature of the third zone is 230 - 240 °C, the temperature of the fourth zone is 250 - 260 °C, the temperature of the fifth zone is 250 - 260 °C, and the temperature of the sixth zone is 240 - 250 °C.

[0020] In summary, the beneficial technical effects of the present application: 1. Antistatic performance: By using modified carbon nanotubes as antistatic agents and leveraging their high conductivity and charge transport characteristics, the antistatic performance of polyester fiber materials can be effectively improved, reducing the risk of static charge accumulation.

[0021] 2. Abrasion resistance: By using hydrophobically modified nano-silicon carbide as an abrasion-resistant agent, the abrasion resistance of polyester fiber materials is enhanced. Nano-silicon carbide forms a strong chemical bond with the substrate, improving the abrasion resistance and service life of the material.

[0022] 3. Antibacterial performance: The antibacterial agent has a biguanide structure and an azo group, showing good antibacterial effects. The guanidine group can inhibit the growth, division, and spore germination of bacteria, while the azo group has high-temperature stability and reactivity, contributing to improving the dyeability of the fiber.

[0023] 4. Waterproof performance: Hydrophobically modified nano-silicon carbide imparts hydrophobic characteristics to the material, enhancing the waterproof performance of polyester fiber materials and reducing the attachment and accumulation of stains.

[0024] 5. Moisture absorption, air permeability, and weather resistance: The carboxyl groups in the antibacterial agent have good hydrophilicity, helping to improve the moisture absorption of the fiber and reducing the possibility of static charge generation. Meanwhile, by adding ultraviolet absorbers and antioxidants, the weather resistance of the material is enhanced.

[0025] 6. Enhancement of mechanical properties: The introduction of carbon nanotubes significantly improves the mechanical properties of polyester fiber materials, especially the breaking strength and elongation at break. Meanwhile, the use of coupling agents helps to improve the dispersion and interfacial interaction of antistatic agents and abrasion-resistant agents in the matrix, further enhancing the overall performance of the material. Specific implementation manners

[0026] The following will describe the implementation schemes of the present application in detail with reference to the examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present application and should not be construed as limiting the scope of the present application. For those conditions not specified in the examples, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. For the reagents or instruments whose manufacturers are not specified, they are all conventional products that can be obtained through commercial purchase.

[0027] In the following examples and preparation examples, 1 part means 100 g.

[0028] Preparation Example 1 Preparation of modified carbon nanotubes The preparation method of modified carbon nanotubes includes the following steps: S21. According to the mass parts, 100 parts of carbon nanotubes are placed in a mixed acid composed of 400 parts of nitric acid with a mass concentration of 70% and 400 parts of sulfuric acid with a mass concentration of 98%. After ultrasonic treatment for 9 h, it is cooled, diluted with deionized water, and then filtered by suction. The filter cake is washed with distilled water to obtain hydroxylated carbon nanotubes; S22. According to the parts by mass, add 20 parts of N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane and 2.5 parts of distilled water into a container and mix evenly at room temperature. After sufficient stirring at room temperature, slowly heat up to 48 °C and react for 7 h to obtain a colorless transparent liquid, then conduct vacuum drying to obtain the amino-terminated hyperbranched polysiloxane; S23. According to the parts by mass, sequentially add 17 parts of polydopamine, 15 parts of amino-terminated hyperbranched polysiloxane, and 95 parts of hydroxylated carbon nanotubes into 200 parts of ethanol under stirring, stir and mix. Finally, add ammonia water to adjust the pH of the system to 7.8, continue stirring for 2.3 h, then let it stand for 6.5 h to obtain the modified carbon nanotubes.

[0029] Preparation Example 2 Preparation of Hydrophobically Modified Nano-Silicon Carbide A preparation method of hydrophobically modified nano-silicon carbide includes the following steps: S41. According to the parts by mass, add 10 parts of nano-silicon carbide with an average particle size of 40 nm into 100 parts of deionized water, disperse evenly to obtain a dispersion, heat up to 88 °C, and adjust the pH of the dispersion to 9.5 with a 10% sodium hydroxide aqueous solution by mass concentration; slowly drop 5 parts of an ethanol solution of 25% orthosilicate by mass concentration into the dispersion within 1 h, conduct a sol-gel reaction for 3 h, then filter, wash three times with absolute ethanol, and dry to obtain coated nano-silicon carbide; S42. According to the parts by mass, add 10 parts of coated nano-silicon carbide into 30 parts of an ethanol aqueous solution with a mass concentration of 75%, adjust the pH value to 4.5, add 0.5 part of γ-aminopropyltriethoxysilane, stir and react for 2 h, filter, wash, and dry to obtain silane-modified nano-silicon carbide; S43. According to the parts by mass, add 30 parts of a dimethylformamide solution of 2% trifluoroacetic anhydride by mass concentration and heat up to 90 °C, add 10 parts of silane-modified nano-silicon carbide, and adjust the pH of the dispersion to 9.3 with a 15% sodium hydroxide aqueous solution by mass concentration, conduct a constant-temperature reaction for 3.4 h, filter, wash, and dry to obtain hydrophobically modified nano-silicon carbide.

[0030] Preparation Example 3 Preparation of Antibacterial Agent A preparation method of antibacterial agent includes the following steps: S51. According to the parts by mass, add 8.4 parts of dicyandiamide into 70 parts of ethanol, and add 50 parts of 4-dimethylbenzeneazobenzene-4-carboxylic acid thereto. Drop 5 parts of hydrochloric acid with a mass concentration of 37% at 113 °C, react for 4.5 h to obtain a mixture for standby; S52. Evaporate the mixture, dissolve it in methanol, filter out the insoluble substances, evaporate the remaining liquid, conduct recrystallization, and filter to obtain the antibacterial agent.

[0031] Example 1 A wear-resistant and antistatic polyester fiber material, by mass fraction, comprises the following preparation raw materials: 80 parts of polyethylene terephthalate, 5 parts of antistatic agent, 8 parts of wear-resistant agent, 6 parts of antibacterial agent, 0.5 part of ultraviolet absorber UV-1164, 0.3 part of antioxidant B900, 1 part of coupling agent. Among them, the antistatic agent is modified carbon nanotube, the wear-resistant agent is hydrophobic modified nano silicon carbide, and the coupling agent is composed of γ-aminopropyltriethoxysilane and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane in a mass fraction ratio of 4:3; The preparation method of the above wear-resistant and antistatic polyester fiber material comprises the following steps: S91. According to the mass fraction, add each raw material in the formula into a high-speed mixer, and mix evenly at 150 °C to obtain a mixed material; S92. Feed the mixed material into a twin-screw extruder through an automatic feeding system for melt extrusion granulation, and then spin it through a melt spinning machine at a temperature of 290 °C, the diameter of the spinneret hole is 0.25 mm, and control the spinning speed at 700 m / min; After spinning, perform drawing, control the draw ratio at 3 times to obtain a fiber semi-finished product; The working temperatures of each zone of the twin-screw extruder are in turn: the temperature of the first zone is 190 °C, the temperature of the second zone is 210 °C, the temperature of the third zone is 230 °C, the temperature of the fourth zone is 250 °C, the temperature of the fifth zone is 250 °C, and the temperature of the sixth zone is 240 °C; S93. Perform plasma surface treatment on the fiber semi-finished product with a treatment power of 400 W and a time of 10 minutes to obtain the wear-resistant and antistatic polyester fiber material.

[0032] Example 2 A wear-resistant and antistatic polyester fiber material, by mass fraction, comprises the following preparation raw materials: 90 parts of polyethylene terephthalate, 7 parts of antistatic agent, 12 parts of wear-resistant agent, 8 parts of antibacterial agent, 1.0 part of ultraviolet absorber UV-1164, 0.5 part of antioxidant B900, 1.5 part of coupling agent. Among them, the antistatic agent is modified carbon nanotube, the wear-resistant agent is hydrophobic modified nano silicon carbide, and the coupling agent is composed of γ-aminopropyltriethoxysilane and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane in a mass fraction ratio of 4:3; The preparation method of the above wear-resistant and antistatic polyester fiber material comprises the following steps: S91. According to the mass fraction, add each raw material in the formula into a high-speed mixer, and mix evenly at 160 °C to obtain a mixed material; S92. Feed the mixture into a twin-screw extruder through an automatic feeding system for melt extrusion granulation, and then spin it through a melt spinning machine at a temperature of 300 °C, a spinneret hole diameter of 0.25 mm, and control the spinning speed at 800 m / min; perform drawing after spinning, control the draw ratio at 4 times to obtain a fiber semi-finished product; the working temperatures of each zone of the twin-screw extruder are in sequence: the first zone temperature is 200 °C, the second zone temperature is 220 °C, the third zone temperature is 240 °C, the fourth zone temperature is 260 °C, the fifth zone temperature is 260 °C, and the sixth zone temperature is 250 °C; S93. Perform plasma surface treatment on the fiber semi-finished product with a treatment power of 500 W and a time of 8 minutes to obtain a wear-resistant and antistatic polyester fiber material.

[0033] Example 3 A wear-resistant and antistatic polyester fiber material, by mass parts, includes the following preparation raw materials: 85 parts of polyethylene terephthalate, 6 parts of antistatic agent, 10 parts of wear-resistant agent, 7 parts of antibacterial agent, 0.7 part of ultraviolet absorber UV-1164, 0.4 part of antioxidant B900, 1.3 parts of coupling agent. Among them, the antistatic agent is modified carbon nanotubes, the wear-resistant agent is hydrophobic modified nano-silicon carbide, and the coupling agent is composed of γ-aminopropyltriethoxysilane and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane in a mass parts ratio of 4:3; The preparation method of the above wear-resistant and antistatic polyester fiber material includes the following steps: S91. Add each raw material in the formula to a high-speed mixer according to mass parts and mix evenly at 155 °C to obtain a mixture; S92. Feed the mixture into a twin-screw extruder through an automatic feeding system for melt extrusion granulation, and then spin it through a melt spinning machine at a temperature of 295 °C, a spinneret hole diameter of 0.25 mm, and control the spinning speed at 750 m / min; perform drawing after spinning, control the draw ratio at 3.4 times to obtain a fiber semi-finished product; the working temperatures of each zone of the twin-screw extruder are in sequence: the first zone temperature is 195 °C, the second zone temperature is 215 °C, the third zone temperature is 235 °C, the fourth zone temperature is 255 °C, the fifth zone temperature is 255 °C, and the sixth zone temperature is 245 °C; S93. Perform plasma surface treatment on the fiber semi-finished product with a treatment power of 450 W and a time of 9 minutes to obtain a wear-resistant and antistatic polyester fiber material.

[0034] Comparative Example 1 Same as Example 3, the difference is that unmodified carbon nanotubes with equal mass parts are used instead of modified carbon nanotubes.

[0035] Comparative Example 2 Same as Example 3, except that unmodified nano-silicon carbide in equal mass parts is used instead of hydrophobically modified nano-silicon carbide.

[0036] Comparative Example 3 Same as Example 3, except that the coupling agent is γ-aminopropyltriethoxysilane.

[0037] Comparative Example 4 Same as Example 3, except that the coupling agent is N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane.

[0038] Performance Test Samples of the wear-resistant and antistatic polyester fiber materials prepared in Examples 1 - 3 and Comparative Examples 1 - 4 were taken. The fiber specification was 110 dtex / 34f for all, and the following performance tests were carried out. Three parallel samples were taken for each group, and the results were averaged. The test results are shown in Table 1; Antistatic property: According to GB / T 12703.4—2010 "Evaluation of Electrostatic Properties of Textiles - Part 4: Resistivity", the surface resistivity of the test sample was measured; Mechanical properties: According to GBT 9997-1988 "Determination of Breaking Strength and Elongation at Break of Chemical Fibre Monofilaments", its breaking strength and elongation at break were determined; Moisture absorption: According to GB / T 9995-1997 "Determination of Moisture Content and Moisture Regain of Textile Materials - Oven Drying Method", the moisture regain was measured after the test sample was equilibrated for 48 h at 25 °C and a relative humidity of 68%; Weather resistance test: After aging in an ultraviolet aging test chamber for 300 h (equivalent to 5 years of natural aging in the natural environment), the breaking strength was tested, and its retention rate was calculated to evaluate the weather resistance; Antibacterial property test: Tested according to the method of QB / T4371-2012; Contact angle: Tested with reference to the standard of GB / T 30447 2013 "Measurement Method of Contact Angle of Nanometer Films"; Wear resistance test: According to the EN 13329 standard, with a CS-10 grinding wheel and a 500 g load, tested by a Table abrasion tester, and the mass loss rate was calculated. The smaller the value, the more wear-resistant.

[0039] Table 1 Performance Test Analyzing the data in Table 1, it can be seen that: 1) The wear-resistant and antistatic polyester fiber materials prepared in Examples 1 - 3 have excellent antistatic properties, wear resistance, antibacterial properties, waterproof properties, moisture absorption and breathability, and weather resistance.

[0040] 2) Comparative analysis of the properties of the wear-resistant and antistatic polyester fiber materials prepared in Example 3 and Comparative Example 1 shows that the modified carbon nanotubes prepared in this application can effectively improve the antistatic performance of the polyester fiber materials by utilizing the high conductivity of carbon nanotubes and the charge transport characteristics of polydopamine, solving the problem of easy generation of static electricity in existing polyester fibers. Carbon nanotubes themselves have extremely high strength and modulus. After grafting into the polyester fiber materials, they can significantly improve the mechanical properties of the polyester fiber materials, especially the breaking strength and elongation at break. The amino-terminated hyperbranched polysiloxane as a coupling agent helps to improve the dispersion of carbon nanotubes in the polyester fiber matrix, reduce the agglomeration phenomenon, and at the same time increase the interfacial interaction between carbon nanotubes and polyester fibers, thereby improving the overall performance of the materials.

[0041] 3) Comparative analysis of the properties of the wear-resistant and antistatic polyester fiber materials prepared in Example 3 and Comparative Example 2 shows that for the hydrophobic modified nano-silicon carbide prepared in this application, first, a silica layer is deposited on the surface of nano-silicon carbide by the sol-gel method to provide sufficient active sites for modification. Then, through the reaction of γ-aminopropyltriethoxysilane with the silicon hydroxyl groups on the silica surface, amino groups are introduced onto the surface of nano-silicon carbide. Subsequently, through the acylation reaction of trifluoroacetic anhydride with some amino groups, trifluoromethyl groups are introduced to endow nano-silicon carbide with hydrophobic properties. By adding nano-silicon carbide with amino and fluorine-containing groups on the surface, among which the amino groups can react with polyethylene terephthalate to form a chemical bond, ensuring a firm connection between nano-silicon carbide and the substrate and improving the wear resistance of the polyester fiber materials. And the fluorine-containing groups extend outward to form a hydrophobic layer, which can endow the polyester fiber materials with waterproof performance.

[0042] 4) Comparative analysis of the properties of the wear-resistant and antistatic polyester fiber materials prepared in Example 3 and Comparative Examples 3 - 4 shows that the coupling agent is composed of γ-aminopropyltriethoxysilane and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane in a mass ratio of 4:3. By utilizing their combined action, different functional groups react with the modified carbon nanotubes, wear-resistant agents, and polyester fibers to form a more stable interfacial connection, thereby enhancing the overall mechanical properties of the polyester fiber materials.

[0043] The above embodiments are only used to explain and illustrate the technical solutions of this application, not to limit it. Although the above embodiments have specifically described this application, those skilled in the art should understand that they can still modify the specific implementation manners of the present invention or make equivalent substitutions. Any modification and equivalent substitution that do not depart from the spirit and scope of this application shall be covered by the protection scope of this application.

Claims

1. A wear-resistant and antistatic polyester fiber material, characterized in that, The preparation raw materials include the following by mass: 80-90 parts of polyethylene terephthalate, 5-7 parts of antistatic agent, 8-12 parts of wear-resistant agent, 6-8 parts of antibacterial agent, 0.5-1.0 parts of ultraviolet absorber, 0.3-0.5 parts of antioxidant, and 1-1.5 parts of coupling agent, wherein the antistatic agent is modified carbon nanotubes; and the wear-resistant agent is hydrophobically modified nano-silicon carbide.

2. The wear-resistant and anti-static polyester fiber material according to claim 1, characterized in that The method for preparing the modified carbon nanotubes comprises the following steps: S21. Place 100 parts by mass of carbon nanotubes in a mixed acid consisting of 400 parts by mass of 70% nitric acid and 400 parts by mass of 98% sulfuric acid, ultrasonicate for 8-10 hours, cool, dilute with deionized water, and filter. Wash the filter cake with distilled water to obtain hydroxylated carbon nanotubes. S22, according to parts by mass, add 20 parts of N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane and 2.5 parts of distilled water into a container and mix them evenly at room temperature. After fully stirring at room temperature, slowly heat it to 45-50 ° C, react for 5-8 hours to obtain a colorless transparent liquid, and vacuum dry it to obtain amino-terminated hyperbranched polysiloxane; S23. According to the mass parts, polydopamine, amino-terminated hyperbranched polysiloxane, and hydroxylated carbon nanotubes are added to ethanol in sequence under stirring, and the mixture is stirred. Finally, ammonia water is added to adjust the pH of the system to 7.

8. The mixture is stirred for 2-3 hours, and then allowed to stand for 6-7 hours to obtain modified carbon nanotubes.

3. The wear-resistant and anti-static polyester fiber material according to claim 2, wherein, In step S23, the mass ratio of the ethanol, polydopamine, amino-terminated hyperbranched polysiloxane and hydroxylated carbon nanotubes is 200:17:15:(90-100).

4. The wear-resistant and antistatic polyester fiber material according to claim 1, wherein The preparation method of the hydrophobically modified nano-silicon carbide comprises the following steps: S41. According to the mass ratio, 10 parts of nano-silicon carbide with a particle size of 20-50 nm were added to 100 parts of deionized water and dispersed evenly to obtain a dispersion. The dispersion was heated to 85-90° C. and the pH of the dispersion was adjusted to 9-10 with a 10% sodium hydroxide aqueous solution. 5 parts of an ethanol solution of orthosilicate with a mass concentration of 25% was slowly added dropwise to the dispersion within 1 hour. The sol-gel reaction was carried out for 3 hours. The mixture was then filtered, washed three times with anhydrous ethanol, and dried to obtain coated nano-silicon carbide. S42, adding 10 parts by mass of the coated nano-silicon carbide to 30 parts by mass of a 75% ethanol aqueous solution, adjusting the pH to 4-5, adding 0.5 parts of γ-aminopropyltriethoxysilane, stirring and reacting for 1-2 hours, filtering, washing with water, and drying to obtain silane-modified nano-silicon carbide; S43. According to the mass fractions, 30 parts of dimethylformamide solution with a mass concentration of 2% trifluoroacetic anhydride are heated to 90°C, 10 parts of silane-modified nano-silicon carbide are added, and the pH of the dispersion is adjusted to 9-10 with a mass concentration of 15% sodium hydroxide aqueous solution. The mixture is reacted at a constant temperature for 3-4 hours, filtered, washed with water, and dried to obtain hydrophobically modified nano-silicon carbide.

5. The wear-resistant and anti-static polyester fiber material according to claim 1, wherein, The preparation method of the antibacterial agent comprises the following steps: S51. According to the parts by mass, add 8.4 parts of dicyandiamide to 70 parts of ethanol, add 50 parts of 4 - dimethylbenzene azobenzene - 4 - carboxylic acid thereto, and dropwise add 5 parts of hydrochloric acid with a mass concentration of 37% at 110 - 115 °C, and react for 4 - 5 h to obtain a mixture for standby; S52. Evaporate the mixture and dissolve it in methanol, filter out the insoluble substances, evaporate the remaining liquid, recrystallize, and filter to obtain the antibacterial agent.

6. The wear-resistant and anti-static polyester fiber material according to claim 1, wherein, The ultraviolet absorber is ultraviolet absorber UV - 1164.

7. The wear-resistant and anti-static polyester fiber material according to claim 1, wherein, The coupling agent is composed of γ - aminopropyltriethoxysilane and N - (β - aminoethyl) - γ - aminopropyltrimethoxysilane in a mass ratio of 4:

3.

8. The wear-resistant and anti-static polyester fiber material according to claim 1, characterized in that The antioxidant is antioxidant B900.

9. A method for preparing the wear-resistant and antistatic polyester fiber material according to any one of claims 1-8, characterized in that, It includes the following steps: S91. According to the parts by mass, add each raw material in the formula to a high - speed mixer, and mix well at 150 - 160 °C to obtain a mixed material; S92. Feed the mixed material into a twin - screw extruder through an automatic feeding system for melt extrusion granulation, and then spin - spin through a melt spinning machine at a temperature of 290 - 300 °C, the diameter of the spinneret hole is 0.25 mm, and control the spinning speed at 700 - 800 m / min; after spinning, perform drawing, and control the draw ratio at 3 - 4 times to obtain a semi - finished fiber; S93. Perform plasma surface treatment on the semi - finished fiber, with a treatment power of 400 - 500 W and a time of 8 - 10 minutes to obtain a wear - resistant and antistatic polyester fiber material.

10. The preparation method of a wear-resistant and antistatic polyester fiber material according to claim 9, characterized in that, The working temperatures of each zone of the twin - screw extruder are in turn: the temperature of the first zone is 190 - 200 °C, the temperature of the second zone is 210 - 220 °C, the temperature of the third zone is 230 - 240 °C, the temperature of the fourth zone is 250 - 260 °C, the temperature of the fifth zone is 250 - 260 °C, and the temperature of the sixth zone is 240 - 250 °C.

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