A textile fabric and its preparation method

Abstract

The present invention provides a textile fabric and a preparation method thereof, belonging to the technical field of textile materials; in the present invention, polyester fiber and cotton fiber are selected as the base materials. The polyester fiber is treated with sodium dodecyl benzene sulfonate and phosphoric acid to form an activation layer and phosphate ester groups on its surface, enhancing the polarity and adsorption ability. Subsequently, a metallic silver film is deposited in a silver ammonia solution, and the silver film is modified with β-cyclodextrin to improve the hydrophilicity, antioxidant property and functionalization ability; the cotton fiber is pretreated with hydrochloric acid to enhance the combination with aniline monomers, and a conductive polyaniline coating is formed through chemical oxidative polymerization; in addition, graphene and carbon nanotubes are added to construct a multi-dimensional conductive network, and uniform dispersion is achieved through dispersants such as polyvinylpyrrolidone and sodium dodecyl benzene sulfonate, and the binding strength is improved by cross-linking with glutaraldehyde; the synergistic effect of the modification of the two fibers improves the conductive and mechanical properties of the composite material.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile materials and relates to a textile fabric and a preparation method thereof. Background Art

[0002] At present, intelligent textiles not only meet the basic requirements of traditional textiles in terms of comfort, durability, breathability, etc., but also have various additional functions such as sensing, conductivity, antibacterial, etc. Driven by the Internet of Things and intelligent technologies, the market demand for intelligent textiles continues to expand, and its research and development has become one of the important directions of modern textile industry.

[0003] The functionalization and diversification development of intelligent textiles largely benefits from the introduction of new nanomaterials. Among them, graphene has been widely used in the functional modification research of textiles due to its excellent electrical conductivity, thermal conductivity, high mechanical strength, chemical stability and light mass. By compounding graphene with fiber materials, the textile fabric can be effectively endowed with excellent electrical conductivity, and at the same time, on the basis of ensuring flexibility and comfort, its mechanical properties and durability can be greatly improved. In addition, the multifunctionality of graphene also makes it possible to realize multi-task integration for intelligent textiles, such as integrating multiple functions of conductivity, heating, protection, etc.

[0004] However, although the introduction of graphene provides new opportunities for the development of intelligent textiles, there are still many deficiencies in the electrical conductivity and flexibility of existing fiber materials. Taking polyester fiber as an example, it is widely used in the textile field due to its good mechanical properties, wear resistance and chemical stability, but its poor electrical conductivity limits its application potential in conductive and intelligent textiles. Summary of the Invention

[0005] In view of the above problems, the purpose of the present invention is to provide a textile fabric and a preparation method thereof. The present invention selects polyester fiber and cotton fiber as the base materials, and endows them with excellent conductivity and multifunctionality through chemical modification. Due to the synergistic effect of ester groups and benzene rings in the molecular structure of polyester fiber, it exhibits high strength, wear resistance and chemical stability. At the same time, the surface hydrophobicity enhances the anti-pollution and corrosion resistance. Through treatment with sodium dodecylbenzenesulfonate, an activated layer with negative charge is formed on the surface of polyester fiber, and then treatment with phosphoric acid generates phosphate groups, significantly improving the polarity and adsorption capacity of the fiber, providing attachment sites for the deposition of silver ions. Silver ions in the silver ammonia solution are combined on the fiber surface through electrostatic interaction and coordination bonds, and a uniform conductive silver film is formed under the action of ascorbic acid; further modification of the silver film with β-cyclodextrin improves the hydrophilicity, antioxidant property and the ability to capture small molecules of polyester fiber. Cotton fiber has high chemical reactivity and flexibility due to the abundant hydroxyl groups in its cellulose. Through pretreatment with hydrochloric acid, its binding ability with aniline monomers is enhanced, and a uniform conductive polyaniline coating is formed through chemical oxidative polymerization. In addition, graphene and carbon nanotubes are used as conductive enhancing materials, and a multi-dimensional conductive network is constructed through the synergistic effect of high specific surface area and one-dimensional conjugated structure. Polyvinylpyrrolidone and sodium dodecylbenzenesulfonate are used to promote uniform dispersion, and glutaraldehyde crosslinking is used to enhance their binding strength, thereby significantly improving the conductivity and structural stability of the composite fiber.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In the first aspect, the present invention provides a preparation method of a textile fabric, and the preparation method of the textile fabric includes: uniformly mixing 70-80 parts by mass of modified polyester fiber and 20-30 parts by mass of conductive composite fiber, and then weaving them into a textile fabric;

[0008] The preparation method of the modified polyester fiber is as follows:

[0009] S11: Ultrasonically clean the polyester fiber with absolute ethanol to obtain pretreated polyester fiber; add sodium dodecylbenzenesulfonate to the phosphoric acid solution to obtain an activation solution, and immerse the pretreated polyester fiber in the activation solution to obtain activated polyester fiber;

[0010] S12: Mix silver nitrate, ethylenediaminetetraacetic acid and ammonia water to obtain a silver ammonia solution, immerse the activated polyester fiber in the silver ammonia solution, stir and impregnate, and then dropwise add ascorbic acid solution to react to obtain silver-plated modified polyester fiber;

[0011] S13: Prepare a β-cyclodextrin solution, adjust its pH with sodium hydroxide solution to obtain a functionalized solution, and immerse the silver-plated modified polyester fiber in the functionalized solution to react to obtain modified polyester fiber.

[0012] The preparation method of the conductive composite fiber includes:

[0013] S21: Ultrasonically clean cotton fibers with absolute ethanol and then dry them to obtain first pretreated cotton fibers; immerse the first pretreated cotton fibers in a hydrochloric acid solution, and after impregnation at room temperature, obtain pretreated cotton fibers;

[0014] S22: Add ammonium persulfate to a hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby. Add aniline monomer to a hydrochloric acid solution to obtain a monomer solution. Immerse the pretreated cotton fibers in the monomer solution, stir, and then dropwise add the oxidant solution to obtain polyaniline / cotton composite fibers;

[0015] S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate to deionized water to obtain a dispersion base solution, and then add graphene and carbon nanotubes to obtain a modified dispersion solution; immerse the polyaniline / cotton composite fibers in a glutaraldehyde solution for activation and then take them out, wash them, and then immerse them in the modified dispersion solution to react to obtain modified polyaniline / cotton composite fibers;

[0016] S24: Immerse the modified polyaniline / cotton composite fibers in a dodecylbenzenesulfonic acid solution to obtain doped modified fibers; prepare a quaternary ammonium salt type antistatic agent solution, adjust the pH with acetic acid to obtain an antistatic impregnation solution, and immerse the doped modified fibers to obtain conductive composite fibers.

[0017] Specifically, the preparation method of the modified polyester fibers is as follows:

[0018] S11: Ultrasonically clean polyester fibers with absolute ethanol and then dry them to obtain pretreated polyester fibers; add sodium dodecylbenzenesulfonate to a phosphoric acid solution to obtain an activation solution, immerse the pretreated polyester fibers in the activation solution, carry out a constant-temperature stirring reaction, take them out, wash them, and dry them to obtain activated polyester fibers;

[0019] S12: Mix silver nitrate, ethylenediaminetetraacetic acid and ammonia water to obtain a silver ammonia solution. Immerse the activated polyester fibers in the silver ammonia solution, stir and impregnate them at room temperature, then dropwise add ascorbic acid solution, stir and react, wash and dry to obtain silver-plated modified polyester fibers;

[0020] S13: Prepare a β-cyclodextrin solution, adjust its pH with a sodium hydroxide solution to obtain a functionalized solution, immerse the silver-plated modified polyester fibers in the functionalized solution, carry out a constant-temperature stirring, then wash and dry to obtain modified polyester fibers;

[0021] The preparation method of the conductive composite fibers includes:

[0022] S21: Ultrasonically clean cotton fibers with absolute ethanol and then dry them to obtain first pretreated cotton fibers; immerse the first pretreated cotton fibers in a hydrochloric acid solution, and after impregnation at room temperature, obtain pretreated cotton fibers;

[0023] S22: Add ammonium persulfate into hydrochloric acid solution to obtain an oxidant solution, which is reserved in an ice-water bath. Add aniline monomer into hydrochloric acid solution to obtain a monomer solution. Immerse the pretreated cotton fiber in the monomer solution under ice-water bath conditions. After stirring, add the oxidant solution dropwise, continue stirring and reacting, wash and dry to obtain polyaniline / cotton composite fiber;

[0024] S23: Add graphene, carbon nanotubes and polyvinylpyrrolidone into deionized water, and ultrasonically disperse under ice-water bath conditions to obtain a modified dispersion; Immerse the polyaniline / cotton composite fiber in glutaraldehyde solution for activation and then take it out. After washing, immerse it in the modified dispersion, stir at room temperature and then take it out, wash and dry to obtain a modified polyaniline / cotton composite fiber;

[0025] S24: Immerse the modified polyaniline / cotton composite fiber in dodecylbenzenesulfonic acid solution, wash and dry to obtain a doped modified fiber; Prepare a quaternary ammonium salt type antistatic agent solution, adjust the pH with acetic acid to obtain an antistatic impregnating solution, immerse the doped modified fiber, take it out after constant temperature stirring, wash and dry to obtain a conductive composite fiber.

[0026] As a preferred technical solution of the present invention, in S11, the mass fraction of the phosphoric acid solution is 10-15wt.%, for example, it can be 10.0wt.%, 10.5wt.%, 11.0wt.%, 11.5wt.%, 12.0wt.%, 12.5wt.%, 13.0wt.%, 13.5wt.%, 14.0wt.%, 14.5wt.% or 15.0wt.%, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0027] In some alternative embodiments, the feeding amount of sodium dodecylbenzenesulfonate in the activation solution is 0.5-1.0g / L, for example, it can be 0.50g / L, 0.55g / L, 0.60g / L, 0.65g / L, 0.70g / L, 0.75g / L, 0.80g / L, 0.85g / L, 0.90g / L, 0.95g / L or 1.00g / L, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0028] In some alternative embodiments, the solid-liquid ratio of the pretreated polyester fiber to the activation solution is 1:(20-30), for example, it can be 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29 or 1:30, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0029] In some alternative embodiments, the temperature of the constant-temperature stirring reaction is 60 - 65 °C. For example, it can be 60.0 °C, 60.5 °C, 61.0 °C, 61.5 °C, 62.0 °C, 62.5 °C, 63.0 °C, 63.5 °C, 64.0 °C, 64.5 °C or 65.0 °C. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0030] In some alternative embodiments, the rotation speed of the constant-temperature stirring reaction is 200 - 250 rpm. For example, it can be 200 rpm, 205 rpm, 210 rpm, 215 rpm, 220 rpm, 225 rpm, 230 rpm, 235 rpm, 240 rpm, 245 rpm or 250 rpm. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0031] In some alternative embodiments, the time of the constant-temperature stirring reaction is 15 - 20 min. For example, it can be 15.0 min, 15.5 min, 16.0 min, 16.5 min, 17.0 min, 17.5 min, 18.0 min, 18.5 min, 19.0 min, 19.5 min or 20.0 min. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0032] As a preferred technical solution of the present invention, in S12, the concentration of silver nitrate in the silver ammonia solution is 0.1 - 0.2 M. For example, it can be 0.10 M, 0.11 M, 0.12 M, 0.13 M, 0.14 M, 0.15 M, 0.16 M, 0.17 M, 0.18 M, 0.19 M or 0.20 M. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0033] In some alternative embodiments, the concentration of ethylenediaminetetraacetic acid in the silver ammonia solution is 2 - 3 g / L. For example, it can be 2.0 g / L, 2.1 g / L, 2.2 g / L, 2.3 g / L, 2.4 g / L, 2.5 g / L, 2.6 g / L, 2.7 g / L, 2.8 g / L, 2.9 g / L or 3.0 g / L. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0034] In some alternative embodiments, ammonia water is added to adjust the pH of the silver ammonia solution to 9 - 10. For example, it can be 9.0, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9 or 10.0. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0035] In some alternative embodiments, the solid-liquid ratio of the activated polyester fiber to the silver ammonia solution is 1:(30 - 40), for example, it can be 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39 or 1:40, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0036] In some alternative embodiments, the concentration of the ascorbic acid solution is 15 - 20 g / L, for example, it can be 15.0 g / L, 15.5 g / L, 16.0 g / L, 16.5 g / L, 17.0 g / L, 17.5 g / L, 18.0 g / L, 18.5 g / L, 19.0 g / L, 19.5 g / L or 20.0 g / L, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0037] In some alternative embodiments, the dropping rate of the ascorbic acid solution is 2 - 3 mL / min, for example, it can be 2.0 mL / min, 2.1 mL / min, 2.2 mL / min, 2.3 mL / min, 2.4 mL / min, 2.5 mL / min, 2.6 mL / min, 2.7 mL / min, 2.8 mL / min, 2.9 mL / min or 3.0 mL / min, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0038] In some alternative embodiments, the molar ratio of ascorbic acid to silver nitrate is (0.8 - 1):1, for example, it can be 0.80:1, 0.82:1, 0.84:1, 0.86:1, 0.88:1, 0.90:1, 0.92:1, 0.94:1, 0.96:1, 0.98:1 or 1.00:1, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0039] In some alternative embodiments, the temperature of the stirring reaction is 20 - 25 °C, for example, it can be 20.0 °C, 20.5 °C, 21.0 °C, 21.5 °C, 22.0 °C, 22.5 °C, 23.0 °C, 23.5 °C, 24.0 °C, 24.5 °C or 25.0 °C, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0040] In some alternative embodiments, the rotation speed of the stirring reaction is 150 - 200 rpm. For example, it can be 150 rpm, 155 rpm, 160 rpm, 165 rpm, 170 rpm, 175 rpm, 180 rpm, 185 rpm, 190 rpm, 195 rpm or 200 rpm. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0041] In some alternative embodiments, the time of the stirring reaction is 20 - 30 min. For example, it can be 20.0 min, 21.0 min, 22.0 min, 23.0 min, 24.0 min, 25.0 min, 26.0 min, 27.0 min, 28.0 min, 29.0 min or 30.0 min. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0042] As a preferred technical solution of the present invention, in S13, the mass fraction of the β - cyclodextrin solution is 1 - 1.5 wt.%. For example, it can be 1.00 wt.%, 1.05 wt.%, 1.10 wt.%, 1.15 wt.%, 1.20 wt.%, 1.25 wt.%, 1.30 wt.%, 1.35 wt.%, 1.40 wt.%, 1.45 wt.% or 1.50 wt.%. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0043] In some alternative embodiments, the concentration of the sodium hydroxide solution is 0.1 - 0.2 M. For example, it can be 0.10 M, 0.11 M, 0.12 M, 0.13 M, 0.14 M, 0.15 M, 0.16 M, 0.17 M, 0.18 M, 0.19 M or 0.20 M. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0044] In some alternative embodiments, the sodium hydroxide solution adjusts the pH of the β - cyclodextrin solution to 6 - 7. For example, it can be 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9 or 7.0. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0045] In some alternative embodiments, the solid - liquid ratio of the silver - plated modified polyester fiber to the functionalized solution is 1:(20 - 30). For example, it can be 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29 or 1:30. However, it is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0046] In some alternative embodiments, the temperature of the constant-temperature stirring is 50 - 55 °C. For example, it can be 50.0 °C, 50.5 °C, 51.0 °C, 51.5 °C, 52.0 °C, 52.5 °C, 53.0 °C, 53.5 °C, 54.0 °C, 54.5 °C or 55.0 °C. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0047] In some alternative embodiments, the rotation speed of the constant-temperature stirring is 150 - 200 rpm. For example, it can be 150 rpm, 155 rpm, 160 rpm, 165 rpm, 170 rpm, 175 rpm, 180 rpm, 185 rpm, 190 rpm, 195 rpm or 200 rpm. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0048] In some alternative embodiments, the time of the constant-temperature stirring is 90 - 100 min. For example, it can be 90.0 min, 91.0 min, 92.0 min, 93.0 min, 94.0 min, 95.0 min, 96.0 min, 97.0 min, 98.0 min, 99.0 min or 100.0 min. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0049] As a preferred technical solution of the present invention, in S21, the solid-liquid ratio of the first pretreated cotton fiber to the hydrochloric acid solution is 1:(30 - 40). For example, it can be 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39 or 1:40. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0050] In some alternative embodiments, the concentration of the hydrochloric acid solution is 0.5 - 1 M. For example, it can be 0.50 M, 0.55 M, 0.60 M, 0.65 M, 0.70 M, 0.75 M, 0.80 M, 0.85 M, 0.90 M, 0.95 M or 1.00 M. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0051] In some alternative embodiments, the first pretreated cotton fibers are impregnated in a hydrochloric acid solution for 10 - 15 minutes, for example, it can be 10.0 minutes, 10.5 minutes, 11.0 minutes, 11.5 minutes, 12.0 minutes, 12.5 minutes, 13.0 minutes, 13.5 minutes, 14.0 minutes, 14.5 minutes or 15.0 minutes, but not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0052] As a preferred technical solution of the present invention, in S22, the concentration of ammonium persulfate in the oxidant solution is 0.25 - 0.3 M, for example, it can be 0.250 M, 0.255 M, 0.260 M, 0.265 M, 0.270 M, 0.275 M, 0.280 M, 0.285 M, 0.290 M, 0.295 M or 0.300 M, but not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0053] In some alternative embodiments, the concentration of aniline monomer in the monomer solution is 0.2 - 0.25 M, for example, it can be 0.200 M, 0.205 M, 0.210 M, 0.215 M, 0.220 M, 0.225 M, 0.230 M, 0.235 M, 0.240 M, 0.245 M or 0.250 M, but not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0054] In some alternative embodiments, the solid - liquid ratio of the pretreated cotton fibers to the monomer solution is 1:(30 - 35), for example, it can be 1:30.0, 1:30.5, 1:31.0, 1:31.5, 1:32.0, 1:32.5, 1:33.0, 1:33.5, 1:34.0, 1:34.5 or 1:35.0, but not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0055] In some alternative embodiments, the molar ratio of aniline monomer to ammonium persulfate is 1:(1 - 1.25), for example, it can be 1:1.00, 1:1.025, 1:1.050, 1:1.075, 1:1.100, 1:1.125, 1:1.150, 1:1.175, 1:1.200, 1:1.225 or 1:1.250, but not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0056] In some alternative embodiments, the time for continuous stirring of the reaction is 3 - 4 h. For example, it can be 3.0 h, 3.1 h, 3.2 h, 3.3 h, 3.4 h, 3.5 h, 3.6 h, 3.7 h, 3.8 h, 3.9 h or 4.0 h. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0057] As a preferred technical solution of the present invention, in S23, the mass fraction of the polyvinylpyrrolidone is 0.8 - 1.2 wt.%. For example, it can be 0.80 wt.%, 0.85 wt.%, 0.90 wt.%, 0.95 wt.%, 1.00 wt.%, 1.05 wt.%, 1.10 wt.% or 1.20 wt.%. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0058] In some alternative embodiments, the mass fraction of the sodium dodecylbenzenesulfonate is 0.2 - 0.5 wt.%. For example, it can be 0.2 wt.%, 0.23 wt.%, 0.26 wt.%, 0.29 wt.%, 0.32 wt.%, 0.35 wt.%, 0.38 wt.%, 0.41 wt.%, 0.44 wt.%, 0.47 wt.% or 0.5 wt.%. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0059] In some alternative embodiments, the mass ratio of the graphene to the carbon nanotubes is (1 - 2):1. For example, it can be 1.00:1, 1.10:1, 1.20:1, 1.30:1, 1.40:1, 1.50:1, 1.60:1, 1.70:1, 1.80:1, 1.90:1 or 2.00:1. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0060] In some alternative embodiments, the concentration of the mixture of the graphene and the carbon nanotubes is 1.2 - 1.5 mg / mL. For example, it can be 1.20 mg / mL, 1.25 mg / mL, 1.30 mg / mL, 1.35 mg / mL, 1.40 mg / mL, 1.45 mg / mL or 1.50 mg / mL. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0061] In some alternative embodiments, the power of the ultrasonic dispersion is 150 - 200 W. For example, it can be 150 W, 155 W, 160 W, 165 W, 170 W, 175 W, 180 W, 185 W, 190 W, 195 W or 200 W. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0062] In some alternative embodiments, the time of ultrasonic dispersion is 60 - 65 min. For example, it can be 60 min, 60.5 min, 61 min, 61.5 min, 62 min, 62.5 min, 63 min, 63.5 min, 64 min, 64.5 min or 65 min. However, it is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0063] In some alternative embodiments, the mass fraction of the glutaraldehyde solution is 2 - 2.5 wt.%. For example, it can be 2.00 wt.%, 2.05 wt.%, 2.10 wt.%, 2.15 wt.%, 2.20 wt.%, 2.25 wt.%, 2.30 wt.%, 2.35 wt.%, 2.40 wt.%, 2.45 wt.% or 2.50 wt.%. However, it is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0064] In some alternative embodiments, the solid - liquid ratio of the polyaniline / cotton composite fiber to the glutaraldehyde solution is 1:(25 - 30). For example, it can be 1:25.0, 1:25.5, 1:26.0, 1:26.5, 1:27.0, 1:27.5, 1:28.0, 1:28.5, 1:29.0, 1:29.5 or 1:30.0. However, it is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0065] In some alternative embodiments, the activation time is 15 - 20 min. For example, it can be 15.0 min, 15.5 min, 16.0 min, 16.5 min, 17.0 min, 17.5 min, 18.0 min, 18.5 min, 19.0 min, 19.5 min or 20.0 min. However, it is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0066] In some alternative embodiments, the stirring speed during activation is 200 - 250 rpm. For example, it can be 200 rpm, 205 rpm, 210 rpm, 215 rpm, 220 rpm, 225 rpm, 230 rpm, 235 rpm, 240 rpm, 245 rpm or 250 rpm. However, it is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0067] In some alternative embodiments, when the activated polyaniline / cotton composite fiber is immersed in the modified dispersion liquid, the solid-liquid ratio of the polyaniline / cotton composite fiber to the modified dispersion liquid is 1:(20 - 25). For example, it can be 1:20, 1:20.5, 1:21.0, 1:21.5, 1:22.0, 1:22.5, 1:23.0, 1:23.5, 1:24.0, 1:24.5, or 1:25. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0068] In some alternative embodiments, the stirring time at room temperature is 1 - 2 h. For example, it can be 1.0 h, 1.1 h, 1.2 h, 1.3 h, 1.4 h, 1.5 h, 1.6 h, 1.7 h, 1.8 h, 1.9 h, or 2.0 h. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0069] As a preferred technical solution of the present invention, in S24, the concentration of the dodecylbenzenesulfonic acid solution is 0.2 - 0.3 M. For example, it can be 0.20 M, 0.21 M, 0.22 M, 0.23 M, 0.24 M, 0.25 M, 0.26 M, 0.27 M, 0.28 M, 0.29 M, or 0.30 M. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0070] In some alternative embodiments, the solid-liquid ratio of the modified polyaniline / cotton composite fiber to the dodecylbenzenesulfonic acid solution is 1:(35 - 40). For example, it can be 1:35.0, 1:35.5, 1:36.0, 1:36.5, 1:37.0, 1:37.5, 1:38.0, 1:38.5, 1:39.0, 1:39.5, or 1:40.0. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0071] In some alternative embodiments, the impregnation time of the modified polyaniline / cotton composite fiber in the dodecylbenzenesulfonic acid solution is 1.5 - 2 h. For example, it can be 1.50 h, 1.55 h, 1.60 h, 1.65 h, 1.70 h, 1.75 h, 1.80 h, 1.85 h, 1.90 h, 1.95 h, or 2.00 h. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0072] In some alternative embodiments, the mass fraction of the quaternary ammonium salt type antistatic agent solution is 0.8 - 1.2 wt.%, for example, it can be 0.80 wt.%, 0.84 wt.%, 0.88 wt.%, 0.92 wt.%, 0.96 wt.%, 1.00 wt.%, 1.04 wt.%, 1.08 wt.%, 1.12 wt.% or 1.20 wt.%, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0073] In some alternative embodiments, the pH is adjusted to 5.3 - 5.7 with acetic acid, for example, it can be 5.30, 5.34, 5.38, 5.42, 5.46, 5.50, 5.54, 5.58, 5.62, 5.66 or 5.70, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0074] In some alternative embodiments, the solid - liquid ratio of the doped and modified fiber to the antistatic impregnating solution is 1:(30 - 35), for example, it can be 1:30.0, 1:30.5, 1:31.0, 1:31.5, 1:32.0, 1:32.5, 1:33.0, 1:33.5, 1:34.0, 1:34.5 or 1:35.0, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0075] In some alternative embodiments, the temperature of the constant - temperature stirring is 30 - 35 °C, for example, it can be 30.0 °C, 30.5 °C, 31.0 °C, 31.5 °C, 32.0 °C, 32.5 °C, 33.0 °C, 33.5 °C, 34.0 °C, 34.5 °C or 35.0 °C, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0076] In some alternative embodiments, the rotation speed of the constant - temperature stirring is 150 - 200 rpm, for example, it can be 150 rpm, 155 rpm, 160 rpm, 165 rpm, 170 rpm, 175 rpm, 180 rpm, 185 rpm, 190 rpm, 195 rpm or 200 rpm, but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0077] In some alternative embodiments, the time of constant-temperature stirring is 20 - 30 min. For example, it can be 20.0 min, 21.0 min, 22.0 min, 23.0 min, 24.0 min, 25.0 min, 26.0 min, 27.0 min, 28.0 min, 29.0 min or 30.0 min. However, it is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0078] In the present invention, polyester fiber is selected as the base material. Polyester fiber is a polymer material with excellent properties and wide applications. It is mainly formed by the polycondensation reaction of terephthalic acid and ethylene glycol. In its molecular structure, ester groups connect benzene rings and ethylene glycol units, forming a linear polymer chain. The ester group is a group with certain polarity, and the polar interaction between molecules makes polyester fiber have good chemical stability and heat resistance. The presence of ester groups not only enhances the interaction between molecular chains but also enables polyester fiber to maintain stable physical and chemical properties within a relatively wide temperature range.

[0079] The molecular chain structure of polyester fiber also contains benzene rings and ethylene glycol units. The synergistic effect of these structural units makes the fiber exhibit good comprehensive mechanical properties. The benzene ring provides rigidity and heat resistance, endowing polyester fiber with high tensile strength and abrasion resistance; the ethylene glycol unit brings certain flexibility to the molecular chain, enabling the fiber to exhibit good toughness and ductility when subjected to stress. Due to the structural characteristics of these molecular chains, polyester fiber has high mechanical stability, is not easily broken, and can maintain dimensional stability under high-load conditions for a long time. This characteristic of high strength and toughness makes it an ideal framework for various reinforcing materials.

[0080] In addition, the molecular structure of polyester fiber determines its unique surface properties. The hydrophobicity of the polyester fiber surface stems from the presence of non-polar alkyl groups and benzene rings in the molecule, making it not easily absorb water and also increasing its anti-pollution performance. Due to its hydrophobicity and chemical inertness, polyester fiber is not easily degraded in a humid or complex environment and can resist the erosion of various chemical reagents (such as acids and bases). This chemical corrosion resistance not only extends the service life of polyester fiber but also enables it to be widely used in industrial fields that require weather resistance and corrosion resistance.

[0081] In the present invention, polyester fiber serves as the substrate, and its main contributions are its excellent strength, flexibility, and environmental resistance. These properties enable the polyester fiber to maintain good mechanical properties and chemical stability under various complex conditions, making it an indispensable component in composite materials. However, it should be noted that polyester fiber itself is an electrical insulator. Due to the lack of free electrons or ion conduction channels in its molecular chain, its bulk conductivity is extremely low, so it cannot be directly applied to the conductive field. To endow it with conductive properties, the surface of the polyester fiber can be functionalized through various chemical treatment methods.

[0082] To make the polyester fiber have conductivity and functionality, the present invention conducts chemical modification on it to meet the application requirements in conductive textiles and other functional composite materials. Polyester fiber itself is a material with high strength and chemical corrosion resistance, but due to the lack of free electrons and ion conduction channels in its molecular chain, its bulk is an electrical insulator. Therefore, endowing it with conductivity and multifunctionality through surface modification is the key to realizing its high-value-added applications.

[0083] First, sodium dodecylbenzenesulfonate is used to activate the polyester fiber. Sodium dodecylbenzenesulfonate is an anionic surfactant, and its molecular structure contains a hydrophobic long-chain alkyl group and a hydrophilic sulfonic acid group. During the treatment process, sodium dodecylbenzenesulfonate adsorbs on the hydrophobic surface of the polyester fiber through hydrophobic interaction, while its sulfonic acid group is exposed, endowing the fiber surface with negative charges and forming a negatively charged activation layer. This activation layer not only improves the hydrophilicity of the fiber surface but also provides charge binding sites for subsequent adsorption of metal ions (such as silver ions) and other chemical substances, thus enhancing the efficiency of the chemical modification process.

[0084] Secondly, the polyester fiber is surface-modified using a phosphoric acid solution. Phosphoric acid is a weak acidic chemical reagent. During the treatment process, it can partially hydrolyze the ester bonds on the surface of the polyester fiber to generate a small amount of hydroxyl groups. These hydroxyl groups further react with phosphoric acid molecules to form phosphate groups. The phosphate groups have the following multiple functions: The phosphate groups can bind with silver ions or other metal ions through coordination bonds to form stable chemical complexes, providing necessary attachment points for subsequent metal deposition; secondly, the introduction of phosphate groups significantly increases the polarity of the fiber surface (due to the high electron density of the phosphate group), thereby increasing the surface energy of the fiber surface. This increase in surface energy enables the polyester fiber to more easily adsorb various functional materials, including metal nanoparticles, conductive polymers, and water-soluble chemical reagents; at the same time, the phosphoric acid treatment also makes the fiber surface rough through a slight chemical corrosion effect. This surface roughening further increases the specific surface area and attachment ability of the fiber, providing dual physical and chemical enhancement effects for subsequent chemical coating.

[0085] In the present invention, the mass fraction of the phosphoric acid solution is defined as 10 - 15 wt.%. When the mass fraction of the phosphoric acid solution is too low, there will be insufficient active sites on the surface of the obtained activated polyester fiber, and its binding force with the subsequent silver layer is poor, resulting in insufficient conductivity of the final textile fabric; while when the mass fraction of the phosphoric acid solution is too high, it will cause excessive corrosion on the surface of the activated polyester fiber and its mechanical properties will decline.

[0086] The above-mentioned activated polyester fiber is immersed in a silver ammonia solution for silver plating treatment. [Ag(NH3)2] in the silver ammonia solution + is a stable silver ion complex, in which the silver ions are coordinated and stabilized by ammonia molecules. Since the fiber surface is negatively charged with sodium dodecylbenzenesulfonate, the silver ions in [Ag(NH3)2] + can be adsorbed on the fiber surface through electrostatic interaction. In addition, the phosphate groups on the fiber surface can further enhance the adsorption efficiency of silver ions through coordination. Subsequently, under the action of ascorbic acid, the silver ions are reduced to metallic silver, and the reduced metallic silver is gradually deposited on the fiber surface to form a uniform and dense conductive silver film. This silver film not only endows the polyester fiber with excellent conductive properties, but also maintains the flexibility and mechanical strength of the fiber, making it suitable for use as a flexible conductive material.

[0087] Next, to further endow the fiber with multifunctionality, β-cyclodextrin is used to modify the surface of the silver-plated fiber. β-Cyclodextrin is a cyclic oligosaccharide composed of 7 glucose units connected by α-1,4 glycosidic bonds, and its molecular structure has a unique amphiphilic property: the inner cavity is hydrophobic and can accommodate hydrophobic small molecule guests through hydrophobic interaction or van der Waals force; the outer ring is composed of hydroxyl groups on the glucose units and has high hydrophilicity. When β-cyclodextrin is modified on the surface of the silver-plated fiber, the hydroxyl groups on its outer ring are exposed to the outside, significantly enhancing the hydrophilicity of the fiber surface. This modification has the following advantages: the hydrophobic inner cavity of β-cyclodextrin can capture a variety of hydrophobic molecules, such as antibacterial agents (such as tea polyphenols), dye molecules or catalyst molecules, thus endowing the fiber with antibacterial, dyeing or catalytic activity; secondly, after silver plating, the silver layer on the fiber surface usually shows low hydrophilicity, and the hydrophobicity of the polyester fiber itself comes from the hydrophobic parts of benzene rings and ester groups in its molecular structure. By modifying β-cyclodextrin, the hydrophilicity of the fiber surface is significantly improved, making it easier to interact with water-soluble functional agents in an aqueous environment and improving the wettability of the fiber, optimizing the comfort of the final textile; in addition, β-cyclodextrin forms a stable molecular coating on the fiber surface, which can effectively slow down the oxidation process of the silver layer. Specifically, when the silver layer is exposed to air, it is easy to react with sulfides to form silver sulfide, resulting in a decrease in conductive performance. The protective layer of β-cyclodextrin can reduce the direct contact between the silver layer and sulfides in the air, thereby delaying its oxidation and corrosion.

[0088] In the present invention, cotton fiber is selected as the substrate. Cotton fiber is a natural polymer material with a wide range of sources and renewable, and is widely used in the fields of textiles and functional composite materials. The main component of cotton fiber is cellulose. Cellulose is a linear natural polymer, which is composed of glucose units connected by β-1,4-glycosidic bonds, and its molecular formula is (C6H 10 O5) n . A large number of hydroxyl groups are contained in the cellulose molecule, and these hydroxyl groups have high chemical reactivity, enabling cellulose to react with other chemical reagents in various ways. For example, by chemically grafting conductive polymers (such as polyaniline) through chemical bonds or by physically adsorbing with nanomaterials (such as graphene), composite materials with conductivity or other functions can be developed.

[0089] The microstructure of cotton fiber has a high degree of porosity, with a large surface area, which can provide abundant physical adsorption sites for the combination of conductive materials. In addition, the polarity of the cellulose molecular chain enables its surface to adsorb functional materials (such as carbon nanotubes or graphene) through hydrogen bonds, electrostatic interactions or van der Waals forces, thereby realizing the functionalization of the material. Cotton fiber also has good softness and hygroscopicity, which stems from the fact that the hydroxyl groups in its cellulose molecule can form hydrogen bonds with water molecules. These properties of cotton fiber not only enable it to have a wide range of applications in the traditional textile field, but also lay a foundation for it to be an ideal substrate for functional composite materials.

[0090] In order to endow cotton fiber with electrical conductivity, this application conducts pretreatment and polyaniline coating on it. First, the cotton fiber is pretreated by impregnation with hydrochloric acid solution. Hydrochloric acid can protonate the hydroxyl groups in the cellulose molecular chain, thereby introducing positive charges on the fiber surface. This process not only increases the electrostatic attraction between the fiber surface and aniline monomers, but also improves the adsorption ability of the fiber to aniline monomers. In addition, the acidic environment of hydrochloric acid can also improve the efficiency of subsequent polymerization reactions and provide a good chemical environment for the uniform deposition of polyaniline.

[0091] On the surface of the cotton fiber after hydrochloric acid treatment, aniline monomers are converted into polyaniline through chemical oxidative polymerization reaction. Specifically, aniline monomers undergo an oxidation reaction with ammonium persulfate as the oxidant in a hydrochloric acid environment to generate aniline cation radicals. These radicals undergo chain growth reactions on the fiber surface to form polyaniline molecular chains with a conjugated structure. Through this reaction, polyaniline is uniformly deposited on the surface of the cotton fiber, forming a continuous polyaniline coating. This coating adheres firmly to the fiber surface, can effectively endow the fiber with electrical conductivity, and at the same time maintain the flexibility and mechanical strength of the fiber.

[0092] In the present invention, graphene and carbon nanotubes are introduced to modify cotton fibers. Both graphene and carbon nanotubes are excellent conductive materials. Among them, carbon nanotubes have excellent electron conduction performance due to their one-dimensional conjugated structure, while graphene has an ultra-high carrier mobility and a large specific surface area, which can provide a wider electron transport channel. In addition, carbon nanotubes not only have extremely high conductivity but can also bind to the fiber surface through van der Waals forces or π-π interactions. The synergistic effect of the two nanomaterials provides an important basis for the formation of a multi-dimensional conductive network and mechanical enhancement of the composite fiber.

[0093] In order to achieve the uniform dispersion of nanomaterials in the aqueous phase, polyvinylpyrrolidone and sodium dodecylbenzenesulfonate are used as dispersants in the present invention. The hydrophobic chain segments in the polyvinylpyrrolidone molecule can bind to the surface of graphene or carbon nanotubes through non-covalent interactions, while its hydrophilic chain segments interact with water molecules through hydrogen bonds, thus significantly improving the dispersion stability of nanomaterials in the aqueous phase. In this system, the graphene surface lacks oxidation groups, and the synergistic effect of polyvinylpyrrolidone and sodium dodecylbenzenesulfonate is even more important to help graphene form a stable suspension dispersion in the aqueous phase. Such uniformly dispersed nanomaterials can better adhere to the fiber surface and form a more complete coating.

[0094] In order to further enhance the fixation of graphene and carbon nanotubes on the fiber surface, glutaraldehyde is used as a cross-linking agent in the present invention. The aldehyde groups in glutaraldehyde can undergo acetalization reactions with the hydroxyl groups in cellulose molecules to form a stable covalent cross-linking network. Through this cross-linking effect, more binding sites can be provided on the fiber surface, indirectly improving the adhesion strength of graphene and carbon nanotubes, thereby significantly enhancing the structural stability and conductive performance of the composite material.

[0095] In addition, the present application also modifies polyaniline by using dodecylbenzenesulfonic acid as a dopant. Dodecylbenzenesulfonic acid is a strong acidic dopant. By protonating the amino groups in the polyaniline molecular chain, its conjugated structure is stabilized, and the conductive performance of polyaniline is significantly improved. At the same time, a quaternary ammonium salt type antistatic agent is introduced into the system to effectively shield the accumulation of static charges by forming an ion layer on the fiber surface, thereby further optimizing the antistatic performance of the composite material.

[0096] In the present invention, the concentration of the dopant dodecylbenzenesulfonic acid solution is limited to 0.2 - 0.3 M. When the concentration of the dopant solution is too high, an excessive amount of dodecylbenzenesulfonic acid molecules accumulate on the surface of cotton fibers, resulting in an increase in the molecular chain spacing and the formation of a rigid structure, reducing the flexibility of the textile fabric; while when the concentration of the dopant solution is too low, the doping degree is insufficient, the protonation degree of the polyaniline molecular chain is low, the conductive state transformation is incomplete, and the electron transport of the fiber is blocked, resulting in a decrease in the conductive performance.

[0097] There is also a synergistic enhancement effect in the system of the present invention. In terms of mechanical properties: Polyester fibers provide high strength and wear resistance and can serve as the framework material for textile fabrics; while cotton fibers provide flexibility and comfort, making the fabric more skin-friendly. In addition, the two-dimensional sheet structure of graphene can disperse stress between fibers, and the one-dimensional nano-enhancement effect of carbon nanotubes significantly improves the tensile strength and durability of the composite fiber. The synergistic effect of the three forms a strong and flexible composite structure, enabling the composite material to exhibit excellent performance in mechanical properties.

[0098] In terms of electrical conductivity: The silver layer on the surface of polyester fibers provides excellent electrical conductivity, and the polyaniline and nanomaterials on the surface of cotton fibers form a stable conductive network. The two-dimensional conductive sheet layer of graphene and the one-dimensional conductive path of carbon nanotubes act synergistically as "electronic bridges" to connect the conductive nodes between different fibers, forming an efficient conductive path, thereby significantly improving the overall electrical conductivity of the composite material.

[0099] The synergistic effect in interface bonding is as follows: β-cyclodextrin enhances the binding ability between the surface of polyester fibers and conductive components (such as silver layer or polyaniline) through its host-guest interaction; at the same time, glutaraldehyde forms a cross-linked structure through acetalization reaction with the hydroxyl groups of cellulose, thereby significantly improving the binding strength between cotton fibers and nanomaterials. In addition, the two fibers further enhance the stability of the composite structure and improve the overall performance through physical entanglement and chemical interface interaction during the textile process.

[0100] In the second aspect, the present invention provides a textile fabric.

[0101] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0102] The present invention selects polyester fibers and cotton fibers as the base materials. The synergistic effect of ester groups and benzene rings in their molecular structures endows the fibers with high strength, wear resistance and chemical stability. At the same time, the surface hydrophobicity improves its anti-pollution and corrosion resistance; cotton fibers are composed of cellulose, and the abundant hydroxyl groups in the molecular chain endow it with good chemical reaction activity and flexibility, making it an ideal base material for functional modification.

[0103] In the present invention, sodium dodecylbenzenesulfonate is first used to treat polyester fibers to form a negatively charged activation layer on its surface, and then phosphate groups are generated through phosphoric acid treatment, enhancing the polarity and adsorption ability of the fiber surface and providing attachment sites for the subsequent deposition of silver ions. In the silver ammonia solution, silver ions are adsorbed on the fiber surface through electrostatic interaction and coordination bonds and are reduced to metallic silver under the action of ascorbic acid to form a uniform conductive silver film. To further enhance the functionality, the surface of the silver film is modified with β-cyclodextrin to enhance the hydrophilicity and antioxidant performance of the fiber and endow it with the function of capturing small molecules.

[0104] In the present invention, cotton fibers are pretreated with hydrochloric acid to enhance their binding ability with aniline monomers. Aniline undergoes chemical oxidative polymerization under the action of hydrochloric acid and ammonium persulfate to form a uniformly deposited conductive polyaniline coating on the surface of cotton fibers. In addition, graphene and carbon nanotubes are introduced as conductive enhancing materials. The high specific surface area of graphene and the one-dimensional conjugated structure of carbon nanotubes can synergistically construct a multi-dimensional conductive network to improve the conductivity of composite fibers. Graphene and carbon nanotubes are uniformly dispersed by polyvinylpyrrolidone and sodium dodecylbenzenesulfonate dispersants, and glutaraldehyde crosslinking is used to enhance their binding strength on the fiber surface. Description of the Drawings

[0105] Figure 1 It is a scanning electron micrograph of the silver-plated modified polyester fiber provided in Example 1 of the present invention;

[0106] Figure 2 It is a scanning electron micrograph of the polyaniline / cotton composite fiber provided in Example 1 of the present invention. Detailed Description of the Invention

[0107] The technical solution of the present invention will be described in detail below in conjunction with specific embodiments and their accompanying drawings. The embodiments described herein are specific specific embodiments of the present invention and are used to illustrate the concept of the present invention; these descriptions are all explanatory and exemplary and should not be construed as limiting the embodiments of the present invention and the protection scope of the present invention. Except for the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of this application, and these technical solutions include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0108] The chemical reagents used in the examples and comparative examples of the present invention are all commercially available products and have not been further purified or treated.

[0109] Polyester fiber: with a fineness of 1 dtex and a length of 30 mm, purchased from Zibo Baina New Material Technology Co., Ltd.

[0110] Example 1

[0111] This example provides a textile fabric and its preparation method. The preparation method of the textile fabric specifically includes the following steps:

[0112] 76 parts by mass of modified polyester fiber and 22 parts by mass of conductive composite fiber are uniformly mixed and then woven into a textile fabric;

[0113] The preparation method of the modified polyester fiber is as follows:

[0114] S11: The polyester fiber is ultrasonically cleaned with absolute ethanol to obtain a pretreated polyester fiber; sodium dodecylbenzenesulfonate is added to a phosphoric acid solution to obtain an activation solution, and the pretreated polyester fiber is immersed in the activation solution to obtain an activated polyester fiber;

[0115] Specifically, S11: The polyester fiber is ultrasonically cleaned with absolute ethanol and then dried to obtain a pretreated polyester fiber; sodium dodecylbenzenesulfonate is added to a phosphoric acid solution with a mass fraction of 15 wt.% to obtain an activation solution, where the feeding amount of sodium dodecylbenzenesulfonate in the activation solution is 1.0 g / L. The pretreated polyester fiber is immersed in the activation solution, where the solid-liquid ratio of the pretreated polyester fiber to the activation solution is 1:20, and stirred at a constant temperature of 60 °C for 15 min, with a stirring speed of 200 rpm. After taking it out, it is washed and dried to obtain an activated polyester fiber;

[0116] S12: Silver nitrate, ethylenediaminetetraacetic acid and ammonia water are mixed to obtain a silver ammonia solution, and the activated polyester fiber is immersed in the silver ammonia solution. After stirring and impregnating, ascorbic acid solution is added dropwise, and a silver-plated modified polyester fiber is obtained after the reaction;

[0117] Specifically, S12: Silver nitrate, ethylenediaminetetraacetic acid and ammonia water are mixed to obtain a silver ammonia solution, where the concentration of silver nitrate in the silver ammonia solution is 0.2 M, the concentration of ethylenediaminetetraacetic acid in the silver ammonia solution is 2 - 3 g / L, and ammonia water is added to adjust the pH of the silver ammonia solution to 9. The activated polyester fiber is immersed in the silver ammonia solution at a solid-liquid ratio of 1:30. After stirring and impregnating at room temperature, ascorbic acid solution with a concentration of 20 g / L is added dropwise at a dropping speed of 2.3 mL / min, where the molar ratio of ascorbic acid to silver nitrate is 0.8:1. After stirring and reacting at 20 °C at a speed of 150 rpm for 28 min, it is washed and dried to obtain a silver-plated modified polyester fiber; Its scanning electron microscope is as Figure 1 shown, and a layer of conductive silver film deposited on the surface of the polyester fiber can be observed, which can effectively endow the polyester fiber with conductive properties.

[0118] S13: Prepare a β-cyclodextrin solution, adjust its pH with a sodium hydroxide solution to obtain a functionalized solution, and immerse the silver-plated modified polyester fiber in the functionalized solution to obtain a modified polyester fiber.

[0119] Specifically, S13: Prepare a β-cyclodextrin solution with a mass fraction of 1.5 wt.%, adjust the pH of the β-cyclodextrin solution to 6 with a sodium hydroxide solution with a concentration of 0.2 M to obtain a functionalized solution. The silver-plated modified polyester fiber is immersed in the functionalized solution at a solid-liquid ratio of 1:20, and stirred at a constant temperature of 52 °C at a speed of 160 rpm for 92 min, and then washed and dried to obtain a modified polyester fiber;

[0120] The preparation method of the conductive composite fiber includes:

[0121] S21: Ultrasonically clean cotton fibers with absolute ethanol and then dry them to obtain first pretreated cotton fibers; Immerse the first pretreated cotton fibers in a hydrochloric acid solution with a concentration of 0.8 M at a solid-liquid ratio of 1:33, and after impregnating for 12.5 min at room temperature, obtain pretreated cotton fibers;

[0122] S22: Add ammonium persulfate to the hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby. Add aniline monomer to the hydrochloric acid solution to obtain a monomer solution. Immerse the pretreated cotton fibers in the monomer solution, stir, and then dropwise add the oxidant solution to obtain polyaniline / cotton composite fibers;

[0123] Specifically, S22: Add ammonium persulfate to the hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby, where the concentration of ammonium persulfate in the oxidant solution is 0.25 M; Add aniline monomer to the hydrochloric acid solution to obtain a monomer solution, where the concentration of aniline monomer in the monomer solution is 0.23 M. Under the condition of an ice-water bath, immerse the pretreated cotton fibers in the monomer solution at a solid-liquid ratio of 1:30, stir, and then dropwise add the oxidant solution, where the molar ratio of aniline monomer to ammonium persulfate is 1:1. Continue to stir and react for 3.4 h, wash and dry to obtain polyaniline / cotton composite fibers; Figure 2 is the scanning electron microscope image of the polyaniline / cotton composite fiber. Polyaniline is uniformly deposited on the surface of the cotton fiber, forming a continuous polyaniline coating, effectively endowing the cotton fiber with electrical conductivity.

[0124] S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate to deionized water to obtain a dispersion base liquid, and add graphene and carbon nanotubes to obtain a modified dispersion liquid; Immerse the polyaniline / cotton composite fibers in a glutaraldehyde solution for activation and then take them out, wash, and then immerse them in the modified dispersion liquid to react to obtain modified polyaniline / cotton composite fibers;

[0125] Specifically, S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate to deionized water to obtain a dispersion base liquid, add graphene and carbon nanotubes, and ultrasonically disperse them under the condition of an ice-water bath to obtain a modified dispersion liquid, where the mass ratio of graphene to carbon nanotubes is 1:1, the concentration of the mixture of graphene and carbon nanotubes is 1.42 mg / mL, the mass fraction of polyvinylpyrrolidone in the modified dispersion liquid is 0.98 wt.%, the mass fraction of sodium dodecylbenzenesulfonate in the modified dispersion liquid is 0.2 wt.%, and the power of ultrasonic dispersion is 160 W and the time is 62 min; Immerse the polyaniline / cotton composite fibers in a glutaraldehyde solution with a mass fraction of 2.5 wt.%, where the solid-liquid ratio of the polyaniline / cotton composite fibers to the glutaraldehyde solution is 1:25, activate at a rotation speed of 230 rpm for 16 min and then take them out, wash, and then immerse them in the modified dispersion liquid at a solid-liquid ratio of 1:20, stir at room temperature for 1 h and then take them out, wash and dry to obtain modified polyaniline / cotton composite fibers;

[0126] S24: Immerse the modified polyaniline / cotton composite fiber into a dodecylbenzenesulfonic acid solution to obtain a doped modified fiber; prepare a quaternary ammonium salt type antistatic agent solution, adjust the pH with acetic acid to obtain an antistatic impregnating solution, and immerse the doped modified fiber to obtain a conductive composite fiber.

[0127] Specifically, S24: Immerse the modified polyaniline / cotton composite fiber into a dodecylbenzenesulfonic acid solution with a concentration of 0.25 M, where the solid-liquid ratio of the modified polyaniline / cotton composite fiber to the dodecylbenzenesulfonic acid solution is 1:35, the impregnation temperature is 42 °C, and the impregnation time is 1.5 h. Wash and dry to obtain a doped modified fiber; prepare a quaternary ammonium salt type antistatic agent solution with a mass fraction of 1.2 wt.%, adjust the pH to 5.3 with acetic acid to obtain an antistatic impregnating solution, immerse the doped modified fiber at a solid-liquid ratio of 1:30, take it out after stirring at a constant temperature of 33 °C for 22 min at a rotation speed of 170 rpm, wash, and dry to obtain a conductive composite fiber.

[0128] Example 2

[0129] This example provides a textile fabric and its preparation method. The preparation method of the textile fabric specifically includes the following steps:

[0130] Uniformly mix 80 parts by mass of modified polyester fiber and 26 parts by mass of conductive composite fiber and then spin them into a textile fabric;

[0131] The preparation method of the modified polyester fiber is as follows:

[0132] S11: Ultrasonically clean the polyester fiber with absolute ethanol to obtain a pretreated polyester fiber; add sodium dodecylbenzenesulfonate to a phosphoric acid solution to obtain an activation solution, and immerse the pretreated polyester fiber into the activation solution to obtain an activated polyester fiber;

[0133] Specifically, S11: Ultrasonically clean the polyester fiber with absolute ethanol and then dry it to obtain a pretreated polyester fiber; add sodium dodecylbenzenesulfonate to a phosphoric acid solution with a mass fraction of 10 wt.% to obtain an activation solution, where the feeding amount of sodium dodecylbenzenesulfonate in the activation solution is 0.5 g / L. Immerse the pretreated polyester fiber into the activation solution, where the solid-liquid ratio of the pretreated polyester fiber to the activation solution is 1:30, stir and react at a constant temperature of 65 °C for 20 min, where the rotation speed of stirring is 250 rpm. Take it out, wash, and dry to obtain an activated polyester fiber;

[0134] S12: Mix silver nitrate, ethylenediaminetetraacetic acid, and ammonia water to obtain a silver ammonia solution. Immerse the activated polyester fiber into the silver ammonia solution, stir and impregnate it, then dropwise add ascorbic acid solution to react to obtain a silver-plated modified polyester fiber;

[0135] Specifically, S12: Mix silver nitrate, ethylenediaminetetraacetic acid and ammonia water to obtain a silver ammonia solution, where the concentration of silver nitrate in the silver ammonia solution is 0.12 M, the concentration of ethylenediaminetetraacetic acid in the silver ammonia solution is 2 g / L, add ammonia water to adjust the pH of the silver ammonia solution to 9.5, immerse the activated polyester fiber in the silver ammonia solution at a solid-liquid ratio of 1:33, stir and impregnate at room temperature, then dropwise add an ascorbic acid solution with a concentration of 18 g / L at a dropping rate of 2.7 mL / min, where the molar ratio of ascorbic acid to silver nitrate is 0.9:1, stir and react at 25 °C at a rotation speed of 170 rpm for 30 min, then wash and dry to obtain silver-plated modified polyester fiber;

[0136] S13: Prepare a β-cyclodextrin solution, adjust its pH with a sodium hydroxide solution to obtain a functionalized solution, and immerse the silver-plated modified polyester fiber in the functionalized solution to react to obtain a modified polyester fiber.

[0137] Specifically, S13: Prepare a β-cyclodextrin solution with a mass fraction of 1.2 wt.%, adjust the pH of the β-cyclodextrin solution to 7 with a sodium hydroxide solution with a concentration of 0.12 M to obtain a functionalized solution, immerse the silver-plated modified polyester fiber in the functionalized solution at a solid-liquid ratio of 1:27, stir at a constant temperature of 53 °C at a rotation speed of 200 rpm for 96 min, then wash and dry to obtain a modified polyester fiber;

[0138] The preparation method of the conductive composite fiber includes:

[0139] S21: Ultrasonically clean cotton fiber with absolute ethanol and then dry to obtain the first pretreated cotton fiber; Immerse the first pretreated cotton fiber in a hydrochloric acid solution with a concentration of 1 M at a solid-liquid ratio of 1:30, and soak at room temperature for 14.5 min to obtain pretreated cotton fiber;

[0140] S22: Add ammonium persulfate to the hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby, add aniline monomer to the hydrochloric acid solution to obtain a monomer solution, immerse the pretreated cotton fiber in the monomer solution, stir and then dropwise add the oxidant solution to obtain a polyaniline / cotton composite fiber;

[0141] Specifically, S22: Add ammonium persulfate to the hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby, where the concentration of ammonium persulfate in the oxidant solution is 0.3 M; Add aniline monomer to the hydrochloric acid solution to obtain a monomer solution, where the concentration of aniline monomer in the monomer solution is 0.25 M, immerse the pretreated cotton fiber in the monomer solution at a solid-liquid ratio of 1:35 under ice-water bath conditions, stir and then dropwise add the oxidant solution, where the molar ratio of aniline monomer to ammonium persulfate is 1:1.25, continue to stir and react for 3.7 h, wash and dry to obtain a polyaniline / cotton composite fiber;

[0142] S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate to deionized water to obtain a dispersion base solution, and then add graphene and carbon nanotubes to obtain a modified dispersion solution; Immerse the polyaniline / cotton composite fiber in a glutaraldehyde solution for activation and then take it out. After washing, immerse it in the modified dispersion solution to react to obtain a modified polyaniline / cotton composite fiber;

[0143] Specifically, S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate to deionized water to obtain a dispersion base solution, add graphene and carbon nanotubes, and perform ultrasonic dispersion under ice-water bath conditions to obtain a modified dispersion solution, where the mass ratio of graphene to carbon nanotubes is 2:1, the concentration of the mixture of graphene and carbon nanotubes is 1.35 mg / mL, the mass fraction of polyvinylpyrrolidone in the modified dispersion solution is 1.1 wt.%, the mass fraction of sodium dodecylbenzenesulfonate in the modified dispersion solution is 0.3 wt.%, the power of ultrasonic dispersion is 180 W, and the time is 44 min; Immerse the polyaniline / cotton composite fiber in a glutaraldehyde solution with a mass fraction of 2 wt.%, where the solid-liquid ratio of the polyaniline / cotton composite fiber to the glutaraldehyde solution is 1:27, activate it at a rotation speed of 250 rpm for 20 min and then take it out. After washing, immerse it in the modified dispersion solution at a solid-liquid ratio of 1:25, take it out after stirring at room temperature for 1.2 h, wash and dry to obtain a modified polyaniline / cotton composite fiber;

[0144] S24: Immerse the modified polyaniline / cotton composite fiber in a dodecylbenzenesulfonic acid solution to obtain a doped modified fiber; Prepare a quaternary ammonium salt type antistatic agent solution, adjust the pH with acetic acid to obtain an antistatic impregnation solution, and immerse the doped modified fiber to obtain a conductive composite fiber.

[0145] Specifically, S24: Immerse the modified polyaniline / cotton composite fiber in a dodecylbenzenesulfonic acid solution with a concentration of 0.23 M, where the solid-liquid ratio of the modified polyaniline / cotton composite fiber to the dodecylbenzenesulfonic acid solution is 1:40, the impregnation temperature is 45 °C, and the impregnation time is 2 h. Wash and dry to obtain a doped modified fiber; Prepare a quaternary ammonium salt type antistatic agent solution with a mass fraction of 0.8 wt.%, adjust the pH to 5.4 with acetic acid to obtain an antistatic impregnation solution, immerse the doped modified fiber at a solid-liquid ratio of 1:32, take it out after stirring at a constant temperature of 37 °C at a rotation speed of 180 rpm for 28 min, wash and dry to obtain a conductive composite fiber.

[0146] Example 3

[0147] This example provides a textile fabric and a preparation method thereof. The preparation method of the textile fabric specifically includes the following steps:

[0148] Uniformly mix 70 parts by mass of modified polyester fiber and 20 parts by mass of conductive composite fiber and then spin them into a textile fabric;

[0149] The preparation method of the modified polyester fiber is as follows:

[0150] S11: The polyester fiber is ultrasonically cleaned with absolute ethanol to obtain a pretreated polyester fiber; Sodium dodecylbenzenesulfonate is added to a phosphoric acid solution to obtain an activation solution, and the pretreated polyester fiber is immersed in the activation solution to obtain an activated polyester fiber;

[0151] Specifically, S11: The polyester fiber is ultrasonically cleaned with absolute ethanol and then dried to obtain a pretreated polyester fiber; Sodium dodecylbenzenesulfonate is added to a phosphoric acid solution with a mass fraction of 13 wt.% to obtain an activation solution, where the feeding amount of sodium dodecylbenzenesulfonate in the activation solution is 0.8 g / L. The pretreated polyester fiber is immersed in the activation solution, where the solid-liquid ratio of the pretreated polyester fiber to the activation solution is 1:24, and stirred at a constant temperature of 62 °C for 17 min, with a stirring speed of 220 rpm. After taking it out, it is washed and dried to obtain an activated polyester fiber;

[0152] S12: Silver nitrate, ethylenediaminetetraacetic acid and ammonia water are mixed to obtain a silver ammonia solution. The activated polyester fiber is immersed in the silver ammonia solution, stirred and impregnated, and then ascorbic acid solution is added dropwise to obtain a silver-plated modified polyester fiber;

[0153] Specifically, S12: Silver nitrate, ethylenediaminetetraacetic acid and ammonia water are mixed to obtain a silver ammonia solution, where the concentration of silver nitrate in the silver ammonia solution is 0.1 M, the concentration of ethylenediaminetetraacetic acid in the silver ammonia solution is 3 g / L, and ammonia water is added to adjust the pH of the silver ammonia solution to 9.7. The activated polyester fiber is immersed in the silver ammonia solution at a solid-liquid ratio of 1:36. After stirring and impregnating at room temperature, ascorbic acid solution with a concentration of 16 g / L is added dropwise at a dropping speed of 2 mL / min, where the molar ratio of ascorbic acid to silver nitrate is 0.95:1. After stirring and reacting at 21 °C at a speed of 140 rpm for 25 min, it is washed and dried to obtain a silver-plated modified polyester fiber;

[0154] S13: Prepare a β-cyclodextrin solution, adjust its pH with a sodium hydroxide solution to obtain a functionalized solution, and immerse the silver-plated modified polyester fiber in the functionalized solution to obtain a modified polyester fiber.

[0155] Specifically, S13: Prepare a β-cyclodextrin solution with a mass fraction of 1.3 wt.%, adjust the pH of the β-cyclodextrin solution to 6.5 with a sodium hydroxide solution with a concentration of 0.15 M to obtain a functionalized solution. The silver-plated modified polyester fiber is immersed in the functionalized solution at a solid-liquid ratio of 1:30, and stirred at a constant temperature of 50 °C at a speed of 170 rpm for 90 min, and then washed and dried to obtain a modified polyester fiber;

[0156] The preparation method of the conductive composite fiber includes:

[0157] S21: Ultrasonically clean cotton fibers with absolute ethanol and then dry them to obtain first pretreated cotton fibers; Immerse the first pretreated cotton fibers in a hydrochloric acid solution with a concentration of 0.5 M at a solid-liquid ratio of 1:37, and after impregnating at room temperature for 10 min, obtain pretreated cotton fibers;

[0158] S22: Add ammonium persulfate to the hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby. Add aniline monomer to the hydrochloric acid solution to obtain a monomer solution. Immerse the pretreated cotton fibers in the monomer solution, stir, and then dropwise add the oxidant solution to obtain polyaniline / cotton composite fibers;

[0159] Specifically, S22: Add ammonium persulfate to the hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby, where the concentration of ammonium persulfate in the oxidant solution is 0.27 M; Add aniline monomer to the hydrochloric acid solution to obtain a monomer solution, where the concentration of aniline monomer in the monomer solution is 0.2 M. Under the condition of ice-water bath, immerse the pretreated cotton fibers in the monomer solution at a solid-liquid ratio of 1:32, stir, and then dropwise add the oxidant solution, where the molar ratio of aniline monomer to ammonium persulfate is 1:1.15. Continue to stir and react for 3 h, wash and dry to obtain polyaniline / cotton composite fibers;

[0160] S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate to deionized water to obtain a dispersion base liquid, and add graphene and carbon nanotubes to obtain a modified dispersion liquid; Immerse the polyaniline / cotton composite fibers in a glutaraldehyde solution for activation and then take them out, wash and then immerse them in the modified dispersion liquid to react to obtain modified polyaniline / cotton composite fibers;

[0161] Specifically, S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate to deionized water to obtain a dispersion base liquid, add graphene and carbon nanotubes, and ultrasonically disperse under the condition of ice-water bath to obtain a modified dispersion liquid, where the mass ratio of graphene to carbon nanotubes is 1.5:1, the concentration of the mixture of graphene and carbon nanotubes is 1.2 mg / mL, the mass fraction of polyvinylpyrrolidone in the modified dispersion liquid is 0.8 wt.%, the mass fraction of sodium dodecylbenzenesulfonate in the modified dispersion liquid is 0.4 wt.%, the power of ultrasonic dispersion is 150 W and the time is 40 min; Immerse the polyaniline / cotton composite fibers in a glutaraldehyde solution with a mass fraction of 2.3 wt.%, where the solid-liquid ratio of the polyaniline / cotton composite fibers to the glutaraldehyde solution is 1:28, activate at a rotation speed of 210 rpm for 18 min and then take them out, wash and then immerse them in the modified dispersion liquid at a solid-liquid ratio of 1:22, stir at room temperature for 1.8 h and then take them out, wash and dry to obtain modified polyaniline / cotton composite fibers;

[0162] S24: Immerse the modified polyaniline / cotton composite fibers in a dodecylbenzenesulfonic acid solution to obtain doped modified fibers; Prepare a quaternary ammonium salt type antistatic agent solution, adjust the pH with acetic acid to obtain an antistatic impregnation liquid, and immerse the doped modified fibers to obtain conductive composite fibers.

[0163] Specifically, in S24: Immerse the modified polyaniline / cotton composite fiber into a dodecylbenzenesulfonic acid solution with a concentration of 0.2 M, where the solid-liquid ratio of the modified polyaniline / cotton composite fiber to the dodecylbenzenesulfonic acid solution is 1:36, the impregnation temperature is 40 °C, and the impregnation time is 1.8 h. Wash and dry to obtain the doped modified fiber; Prepare a quaternary ammonium salt type antistatic agent solution with a mass fraction of 1.12 wt.%, adjust the pH to 5.6 with acetic acid to obtain the antistatic impregnation solution, immerse the doped modified fiber at a solid-liquid ratio of 1:34, take it out after stirring at a constant temperature of 35 °C for 20 min at a rotation speed of 150 rpm, wash, and dry to obtain the conductive composite fiber.

[0164] Example 4

[0165] This example provides a textile fabric and a preparation method thereof. The preparation method of the textile fabric specifically includes the following steps:

[0166] Uniformly mix 74 parts by mass of modified polyester fiber and 30 parts by mass of conductive composite fiber and then spin them into a textile fabric;

[0167] The preparation method of the modified polyester fiber is as follows:

[0168] S11: Ultrasonically clean the polyester fiber with absolute ethanol to obtain the pretreated polyester fiber; Add sodium dodecylbenzenesulfonate to the phosphoric acid solution to obtain the activation solution, and immerse the pretreated polyester fiber into the activation solution to obtain the activated polyester fiber;

[0169] Specifically, in S11: Ultrasonically clean the polyester fiber with absolute ethanol and then dry it to obtain the pretreated polyester fiber; Add sodium dodecylbenzenesulfonate to a phosphoric acid solution with a mass fraction of 12 wt.% to obtain the activation solution, where the feeding amount of sodium dodecylbenzenesulfonate in the activation solution is 0.7 g / L. Immerse the pretreated polyester fiber into the activation solution, where the solid-liquid ratio of the pretreated polyester fiber to the activation solution is 1:28, stir and react at a constant temperature of 63 °C for 18 min, where the rotation speed of the stirring is 230 rpm. Take it out, wash, and dry to obtain the activated polyester fiber;

[0170] S12: Mix silver nitrate, ethylenediaminetetraacetic acid, and ammonia water to obtain the silver ammonia solution. Immerse the activated polyester fiber into the silver ammonia solution, stir and impregnate, then dropwise add ascorbic acid solution to react to obtain the silver-plated modified polyester fiber;

[0171] Specifically, S12: Mix silver nitrate, ethylenediaminetetraacetic acid, and ammonia water to obtain a silver ammonia solution, where the concentration of silver nitrate in the silver ammonia solution is 0.15 M, the concentration of ethylenediaminetetraacetic acid in the silver ammonia solution is 2.7 g / L, add ammonia water to adjust the pH of the silver ammonia solution to 10, immerse the activated polyester fiber in the silver ammonia solution at a solid-liquid ratio of 1:40, stir and impregnate at room temperature, then dropwise add an ascorbic acid solution with a concentration of 15 g / L at a dropping rate of 3 mL / min, where the molar ratio of ascorbic acid to silver nitrate is 1:1, stir and react at 23 °C at a rotation speed of 200 rpm for 30 min, then wash and dry to obtain silver-plated modified polyester fiber;

[0172] S13: Prepare a β-cyclodextrin solution, adjust its pH with a sodium hydroxide solution to obtain a functionalized solution, and immerse the silver-plated modified polyester fiber in the functionalized solution to react to obtain a modified polyester fiber.

[0173] Specifically, S13: Prepare a β-cyclodextrin solution with a mass fraction of 1 wt.%, adjust the pH of the β-cyclodextrin solution to 6.9 with a sodium hydroxide solution with a concentration of 0.1 M to obtain a functionalized solution, immerse the silver-plated modified polyester fiber in the functionalized solution at a solid-liquid ratio of 1:22, stir at a constant temperature of 55 °C at a rotation speed of 180 rpm for 100 min, then wash and dry to obtain a modified polyester fiber;

[0174] The preparation method of the conductive composite fiber includes:

[0175] S21: Ultrasonically clean cotton fiber with absolute ethanol and then dry to obtain the first pretreated cotton fiber; immerse the first pretreated cotton fiber in a hydrochloric acid solution with a concentration of 0.6 M at a solid-liquid ratio of 1:40, and obtain pretreated cotton fiber after impregnation at room temperature for 15 min;

[0176] S22: Add ammonium persulfate to the hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby, add aniline monomer to the hydrochloric acid solution to obtain a monomer solution, immerse the pretreated cotton fiber in the monomer solution, stir and then dropwise add the oxidant solution to obtain a polyaniline / cotton composite fiber;

[0177] Specifically, S22: Add ammonium persulfate to the hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby, where the concentration of ammonium persulfate in the oxidant solution is 0.28 M; add aniline monomer to the hydrochloric acid solution to obtain a monomer solution, where the concentration of aniline monomer in the monomer solution is 0.24 M, immerse the pretreated cotton fiber in the monomer solution at a solid-liquid ratio of 1:33 under ice-water bath conditions, stir and then dropwise add the oxidant solution, where the molar ratio of aniline monomer to ammonium persulfate is 1:1.2, continue to stir and react for 4 h, wash and dry to obtain a polyaniline / cotton composite fiber;

[0178] S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate into deionized water to obtain a dispersion base solution, and then add graphene and carbon nanotubes to obtain a modified dispersion solution; Immerse the polyaniline / cotton composite fiber into a glutaraldehyde solution for activation and then take it out. After washing, immerse it into the modified dispersion solution to react and obtain a modified polyaniline / cotton composite fiber;

[0179] Specifically, S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate into deionized water to obtain a dispersion base solution, add graphene and carbon nanotubes, and perform ultrasonic dispersion under ice-water bath conditions to obtain a modified dispersion solution. The mass ratio of graphene to carbon nanotubes is 1.2:1, the concentration of the mixture of graphene and carbon nanotubes is 1.5 mg / mL, the mass fraction of polyvinylpyrrolidone in the modified dispersion solution is 1.2 wt.%, the mass fraction of sodium dodecylbenzenesulfonate in the modified dispersion solution is 0.5 wt.%, the power of ultrasonic dispersion is 200 W and the time is 45 min; Immerse the polyaniline / cotton composite fiber into a glutaraldehyde solution with a mass fraction of 2.2 wt.%, where the solid-liquid ratio of the polyaniline / cotton composite fiber to the glutaraldehyde solution is 1:30, activate it at a rotation speed of 240 rpm for 17 min and then take it out. After washing, immerse it into the modified dispersion solution at a solid-liquid ratio of 1:23, take it out after stirring at room temperature for 2 h, wash and dry to obtain a modified polyaniline / cotton composite fiber;

[0180] S24: Immerse the modified polyaniline / cotton composite fiber into a dodecylbenzenesulfonic acid solution to obtain a doped modified fiber; Prepare a quaternary ammonium salt type antistatic agent solution, adjust the pH with acetic acid to obtain an antistatic impregnation solution, and immerse the doped modified fiber to obtain a conductive composite fiber.

[0181] Specifically, S24: Immerse the modified polyaniline / cotton composite fiber into a dodecylbenzenesulfonic acid solution with a concentration of 0.3 M, where the solid-liquid ratio of the modified polyaniline / cotton composite fiber to the dodecylbenzenesulfonic acid solution is 1:38, the impregnation temperature is 43 °C, and the impregnation time is 1.7 h. Wash and dry to obtain a doped modified fiber; Prepare a quaternary ammonium salt type antistatic agent solution with a mass fraction of 1.07 wt.%, adjust the pH to 5.7 with acetic acid to obtain an antistatic impregnation solution, immerse the doped modified fiber at a solid-liquid ratio of 1:35, take it out after stirring at a constant temperature of 36 °C at a rotation speed of 200 rpm for 30 min, wash and dry to obtain a conductive composite fiber.

[0182] Comparative Example 1

[0183] This comparative example provides a textile fabric. The difference from Example 1 is that in S11, the mass fraction of the phosphoric acid solution is 30 wt.%, and other operation steps and process parameters are exactly the same as those in Example 1.

[0184] Comparative Example 2

[0185] This comparative example provides a textile fabric, which is different from Example 1 in that in S11, the mass fraction of the phosphoric acid solution is 5 wt.%, and other operation steps and process parameters are exactly the same as those in Example 1.

[0186] Comparative Example 3

[0187] This comparative example provides a textile fabric, which is different from Example 1 in that in S24, the concentration of the dodecylbenzenesulfonic acid solution is 1 M, and other operation steps and process parameters are exactly the same as those in Example 1.

[0188] Comparative Example 4

[0189] This comparative example provides a textile fabric, which is different from Example 1 in that in S24, the concentration of the dodecylbenzenesulfonic acid solution is 0.1 M, and other operation steps and process parameters are exactly the same as those in Example 1.

[0190] Perform performance tests on the textile fabrics of the above Examples 1 - 4 and Comparative Examples 1 - 4. The specific process is as follows:

[0191] Test the resistivity of the sample according to GB / T 12703.4 - 2010;

[0192] Test the breaking strength of the sample according to GB / T 3923.1 - 2013;

[0193] The test results are shown in Table 1.

[0194] Table 1: Performance test results of the textile fabrics of Examples 1 - 4 and Comparative Examples 1 - 4

[0195]

[0196] From the test results of Example 1 and Comparative Examples 1 and 2, it can be seen that when the mass fraction of the phosphoric acid solution is too high, it will cause excessive corrosion on the surface of the activated polyester fiber, resulting in a decrease in its mechanical properties; while when the mass fraction of the phosphoric acid solution is too low, there will be insufficient active sites on the surface of the obtained activated polyester fiber, and its binding force with the subsequent silver layer is poor, thus resulting in insufficient conductivity of the final textile fabric.

[0197] From the test results of Example 1 and Comparative Examples 3 and 4, it can be seen that when the concentration of the dopant solution is too high, an excessive amount of dodecylbenzenesulfonic acid molecules accumulate on the surface of the cotton fiber, resulting in an increase in the molecular chain spacing and the formation of a rigid structure, and the flexibility of the textile fabric decreases; while when the concentration of the dopant solution is too low, the doping degree is insufficient, the protonation degree of the polyaniline molecular chain is low, the conversion of the conductive state is incomplete, and the electron transport of the fiber is blocked, resulting in a decrease in the conductive performance.

[0198] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A method for preparing a textile fabric, characterized in that, Mix 70 - 80 parts by mass of modified polyester fiber and 20 - 30 parts by mass of conductive composite fiber evenly and then spin them into a textile fabric; The preparation method of the modified polyester fiber is as follows: S11: Ultrasonically clean the polyester fiber with absolute ethanol to obtain pretreated polyester fiber; Add sodium dodecylbenzenesulfonate to the phosphoric acid solution to obtain an activation solution, and immerse the pretreated polyester fiber in the activation solution to obtain activated polyester fiber; S12: Mix silver nitrate, ethylenediaminetetraacetic acid and ammonia water to obtain a silver ammonia solution, immerse the activated polyester fiber in the silver ammonia solution, stir and impregnate, then dropwise add ascorbic acid solution, and react to obtain silver-plated modified polyester fiber; S13: Prepare a β-cyclodextrin solution, adjust its pH with sodium hydroxide solution to obtain a functionalized solution, immerse the silver-plated modified polyester fiber in the functionalized solution, and react to obtain modified polyester fiber; The mass fraction of the phosphoric acid solution is 10 - 15wt.%; The feeding amount of sodium dodecylbenzenesulfonate in the activation solution is 0.5 - 1.0g / L; The concentration of silver nitrate in the silver ammonia solution is 0.1 - 0.2M; The concentration of ethylenediaminetetraacetic acid in the silver ammonia solution is 2 - 3g / L; Add ammonia water to adjust the pH of the silver ammonia solution to 9 - 10; The concentration of the ascorbic acid solution is 15 - 20g / L; The molar ratio of ascorbic acid to silver nitrate is (0.8 - 1):1; The mass fraction of the β-cyclodextrin solution is 1 - 1.5wt.%; The solid-liquid ratio of the silver-plated modified polyester fiber to the functionalized solution is 1:(20 - 30); The preparation method of the conductive composite fiber is as follows: S21: Ultrasonically clean cotton fiber with absolute ethanol and then dry it to obtain the first pretreated cotton fiber; Immerse the first pretreated cotton fiber in hydrochloric acid solution, and immerse it at room temperature to obtain pretreated cotton fiber; S22: Add ammonium persulfate to hydrochloric acid solution to obtain an oxidant solution and keep it in an ice-water bath for standby. Add aniline monomer to hydrochloric acid solution to obtain a monomer solution. Immerse the pretreated cotton fiber in the monomer solution, stir and then dropwise add the oxidant solution to obtain polyaniline / cotton composite fiber; S23: Add polyvinylpyrrolidone and sodium dodecylbenzenesulfonate to deionized water to obtain a dispersion base liquid, add graphene and carbon nanotubes to obtain a modified dispersion liquid; Immerse the polyaniline / cotton composite fiber in glutaraldehyde solution for activation, take it out, wash it, and then immerse it in the modified dispersion liquid to react to obtain modified polyaniline / cotton composite fiber; S24: Immerse the modified polyaniline / cotton composite fiber in dodecylbenzenesulfonic acid solution to obtain doped modified fiber; Prepare a quaternary ammonium salt type antistatic agent solution, adjust the pH with acetic acid to obtain an antistatic impregnating solution, and immerse the doped modified fiber to obtain conductive composite fiber.

2. The preparation method of a textile fabric according to claim 1, characterized in that, In S11: The solid-liquid ratio of the pretreated polyester fiber to the activation solution is 1:(20 - 30).

3. The preparation method of a textile fabric according to claim 1, characterized in that, In S12: The solid-liquid ratio of the activated polyester fiber to the silver ammonia solution is 1:(30 - 40); The dropping rate of the ascorbic acid solution is 2 - 3mL / min.

4. The preparation method of a textile fabric according to claim 1, characterized in that, In S13: The concentration of the sodium hydroxide solution is 0.1 - 0.2M; The sodium hydroxide solution adjusts the pH of the β-cyclodextrin solution to 6 - 7.

5. A method for preparing a textile fabric according to claim 1, characterized in that, In S21: The solid-liquid ratio of the first pretreated cotton fiber to the hydrochloric acid solution is 1:(30 - 40); The concentration of the hydrochloric acid solution is 0.5 - 1M; The first pretreated cotton fiber is impregnated in the hydrochloric acid solution for 10 - 15 min.

6. The preparation method of a textile fabric according to claim 1, characterized in that In S22: The concentration of ammonium persulfate in the oxidant solution is 0.25 - 0.3M; The concentration of aniline monomer in the monomer solution is 0.2 - 0.25M; The solid-liquid ratio of the pretreated cotton fiber to the monomer solution is 1:(30 - 35); The molar ratio of aniline monomer to ammonium persulfate is 1:(1 - 1.25).

7. A method for preparing a textile fabric according to claim 1, wherein In S23: The mass fraction of polyvinylpyrrolidone is 0.8 - 1.2 wt.%; The mass fraction of sodium dodecylbenzenesulfonate is 0.2 - 0.5 wt.%; The mass ratio of graphene to carbon nanotubes is (1 - 2):1; The concentration of the mixture of graphene and carbon nanotubes is 1.2 - 1.5 mg / mL; The mass fraction of the glutaraldehyde solution is 2 - 2.5 wt.%; The solid-liquid ratio of the polyaniline / cotton composite fiber to the glutaraldehyde solution is 1:(25 - 30).

8. The preparation method of a textile fabric according to claim 1, characterized in that, In S24: The concentration of the dodecylbenzenesulfonic acid solution is 0.2 - 0.3M; The solid-liquid ratio of the modified polyaniline / cotton composite fiber to the dodecylbenzenesulfonic acid solution is 1:(35 - 40); The mass fraction of the quaternary ammonium salt type antistatic agent solution is 0.8 - 1.2 wt.%; Adjust the pH to 5.3 - 5.7 with acetic acid; The solid-liquid ratio of the doped modified fiber to the antistatic impregnating solution is 1:(30 - 35).

9. A textile fabric prepared by using the preparation method of a textile fabric according to any one of claims 1 - 8.

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