Antistatic viscose fabric and preparation method thereof

Abstract

The invention relates to the technical field of anti-static fabrics, in particular to an anti-static viscose fiber fabric and a preparation method thereof.The fabric is formed by interweaving warp yarn and weft yarn, the warp yarn is modified viscose fiber, and the linear density is 24TEX; the weft yarns are polyester fibers, and the linear density is 19TEX * 2; the density of the warp yarns is 132-138 pieces per centimeter; the density of the weft yarns is 70-76 pieces per centimeter; the weave structure of the fabric is plain weave; the fabric is subjected to antistatic finishing, the surface of the fabric is coated with antistatic finishing liquid, and the antistatic finishing liquid is prepared from the following components in parts by weight: 2 to 3 parts of quaternary ammonium salt, 0.5 to 1 part of organic silicon softening agent, 0.3 to 0.5 part of cross-linking agent, 0.1 to 0.2 part of nonionic surfactant, 0.5 to 1 part of polyvinylpyrrolidone, 0.1 to 0.3 part of nano titanium dioxide and 94.9 to 96.5 parts of deionized water. A lasting conductive channel is provided, and the overall strength of the fiber is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of antistatic fabrics, in particular to antistatic viscose fiber fabrics and a preparation method thereof. Background Art

[0002] With the advancement of science and technology and the improvement of people's living standards, the functional requirements for textiles are getting higher and higher. Among them, antistatic performance, as a key indicator, is not only related to wearing comfort, but also directly affects the safety of use in certain special environments. Viscose fiber is popular for its excellent moisture absorption and comfort, but its inherent insulation properties lead to prominent static electricity problems, which limits its application in some fields.

[0003] Traditional antistatic treatment methods mainly include adding conductive fillers, surface coating treatment and chemical modification. However, these methods often have problems such as short-lasting antistatic effect, affecting the original performance of the fiber or complex process. For example, although adding conductive fillers can effectively improve the conductivity of the fiber, it often reduces the strength and softness of the fiber. Although the surface coating treatment is simple to operate, it has poor water resistance and is difficult to meet the needs of long-term use. Although the chemical modification method can achieve a lasting antistatic effect, the process is complex, the cost is high, and it is difficult to apply on a large scale.

[0004] In addition, most of the antistatic treatments in the prior art only focus on the realization of a single function, ignoring the importance of multifunctional synergy of textiles. In practical applications, people not only need antistatic properties, but also have comprehensive requirements for the antibacterial properties, softness, strength and other properties of fabrics. How to achieve the synergistic improvement of multiple functions while improving antistatic properties has become a technical problem that needs to be solved in this field. Summary of the invention

[0005] The present invention is based on in-depth consideration of the above problems and proposes an innovative method for preparing antistatic viscose fiber fabric. This method achieves significant improvement and long-term maintenance of antistatic performance through multi-step processing and careful design of multi-component formula, while also synergistically improving the comprehensive properties of the fabric, such as antibacterial property, softness and strength.

[0006] The object of the present invention is to provide an antistatic viscose fiber fabric, the fabric is formed by interweaving warp yarns and weft yarns, wherein:

[0007] The warp yarn is modified viscose fiber with a linear density of 24TEX;

[0008] The weft yarn is polyester fiber with a linear density of 19TEX*2;

[0009] Warp density is 132-138 yarns / cm;

[0010] The weft yarn density is 70-76 yarns / cm;

[0011] The fabric structure is plain weave;

[0012] The fabric is subjected to antistatic finishing, and its surface is coated with an antistatic finishing liquid, wherein the antistatic finishing liquid comprises the following components by weight:

[0013] 2-3 parts of quaternary ammonium salt, 0.5-1 parts of silicone softener, 0.3-0.5 parts of cross-linking agent, 0.1-0.2 parts of non-ionic surfactant, 0.5-1 parts of polyvinyl pyrrolidone, 0.1-0.3 parts of nano titanium dioxide and 94.9-96.5 parts of deionized water.

[0014] Specifically, the quaternary ammonium salt is dihydrogenated fatty dimethyl ammonium chloride.

[0015] Specifically, the organic silicone softener is Magnasoft HSSD.

[0016] Specifically, the cross-linking agent is N,N'-methylenebisacrylamide.

[0017] Specifically, the nonionic surfactant is nonylphenol polyoxyethylene ether NP-10.

[0018] The method for preparing the antistatic viscose fiber fabric comprises the following steps:

[0019] (1) Pretreatment of viscose fiber;

[0020] (2) Conductive polymer coating;

[0021] (3) Activation treatment;

[0022] (4) Color fixation treatment;

[0023] (5) Weaving;

[0024] (6) Antistatic finishing.

[0025] Specifically, the specific steps of the viscose fiber pretreatment in step (1) are:

[0026] First, the viscose fiber is immersed in a potassium hydroxide aqueous solution with a concentration of 0.7-1.0 weight % and treated at 20-25° C. for 5-8 minutes;

[0027] Secondly, immersing the alkali-treated fiber in a 0.7-1.0 wt% hydrochloric acid aqueous solution at 20-25° C. for 3-5 minutes;

[0028] Then, the acid-treated fiber is immersed in a 0.1-0.3 wt% aqueous hydrogen peroxide solution at 20-25° C. for 2-4 minutes;

[0029] Finally, the oxidized fiber is immersed in a sodium dodecylbenzene sulfonate aqueous solution with a concentration of 0.05-0.1 wt % and treated at 20-25° C. for 1-2 minutes;

[0030] After each treatment step, the fibers were rinsed with deionized water;

[0031] After all treatments are completed, vacuum dry at 60-70°C for 30-40 minutes.

[0032] Specifically, the specific steps of the step (2) of coating with a conductive polymer are:

[0033] First, a polymerization reaction solution is prepared, which includes 8-12 parts by weight of 3,4-ethylenedioxythiophene, 20-25 parts by weight of ferric chloride, 1-2 parts by weight of p-toluenesulfonic acid, 30-35 parts by weight of ethanol and 26-41 parts by weight of deionized water;

[0034] Secondly, dissolving 3,4-ethylenedioxythiophene in ethanol at 0-5°C;

[0035] Then, ferric chloride and p-toluenesulfonic acid were dissolved in deionized water;

[0036] Again, the pretreated viscose fiber was immersed in a ferric chloride solution with a liquid ratio of 1:25;

[0037] Then, slowly add 3,4-ethylenedioxythiophene solution dropwise, react for 2-3 hours, and stir at 150-200 rpm;

[0038] Finally, after the reaction, the fiber was washed with ethanol and deionized water in turn and dried under vacuum at 50-60°C for 2-3 hours.

[0039] Specifically, the specific steps of the activation treatment in step (3) and the color fixing treatment in step (4) are:

[0040] First, prepare an activation solution, which includes 0.5-1.0 parts of citric acid, 0.3-0.5 parts of sodium dihydrogen phosphate, 0.1-0.2 parts of sodium lauryl sulfate and 98.3-99.1 parts of deionized water by weight, and adjust the pH to 5.5-6.5;

[0041] Secondly, immerse the coated fiber in the activation solution with a liquid ratio of 1:30, treat at 30-40°C for 4-5 minutes, and stir at a speed of 100-150rpm;

[0042] Then, take out the fiber, rinse it briefly with deionized water, and dry it at 70-80°C for 20-30 minutes;

[0043] Next, a fixing solution is prepared, which includes, by weight, 2-3 parts of hexadecyltrimethylammonium bromide, 1-2 parts of polyvinylpyrrolidone, 0.5-1 parts of polyethylene glycol (molecular weight 4000) and 94-96.5 parts of deionized water;

[0044] Next, the activated fiber is immersed in the fixing solution at a liquid ratio of 1:20 and immersed at room temperature for 90 to 100 seconds;

[0045] Finally, pre-rolling is performed using a rolling mill, rolling twice at a pressure of 0.3-0.4 MPa, dipping again for 90 to 100 seconds, rolling twice again at a pressure of 0.3-0.4 MPa, and drying at 90-100°C for 5-6 minutes.

[0046] Specifically, the specific steps of the antistatic finishing in step (6) are:

[0047] First, prepare an antistatic finishing solution by dissolving quaternary ammonium salt, nonionic surfactant and polyvinyl pyrrolidone in deionized water and stirring evenly;

[0048] Secondly, emulsify the silicone softener and add it into the above solution;

[0049] Then, the cross-linking agent is dissolved and added to the mixture;

[0050] Again, disperse the nano-titanium dioxide in a small amount of water, add the mixed solution after ultrasonic treatment for 10 minutes, adjust the pH to 5.5-6.5, and stir evenly;

[0051] Next, immerse the fabric in the finishing solution at a liquid ratio of 1:15 and soak for 3-5 minutes at room temperature;

[0052] Then, the rolling mill is used for rolling twice, with a pressure of 0.4-0.5MPa and a rolling rate of 80-90%;

[0053] Again, infrared pre-drying is used at a temperature of 80-90°C for 2-3 minutes;

[0054] Next, a tension setting machine is used with a temperature of 140-150°C for 60 to 90 seconds to keep the fabric width stable and the tension controlled at 300-400N / m.

[0055] Then, use a cold air blower to cool the fabric to room temperature for 3-5 minutes;

[0056] Finally, the treated fabric is rinsed in warm water at 50-60°C for 1-2 minutes to remove unfixed chemicals, and then dried at 80-90°C for 3-5 minutes.

[0057] The innovative features and technical effects of the present invention are mainly reflected in the following aspects:

[0058] The core innovation of the present invention is to use the conductive monomer 3,4-ethylenedioxythiophene (EDOT) to form a unique embedded conductive network with viscose fibers. The thiophene ring and ethylenedioxy group in the EDOT molecule can form hydrogen bonds with the hydroxyl groups in the cellulose molecule to achieve deep physical adsorption. During the polymerization process, the poly (3,4-ethylenedioxythiophene) (PEDOT) chain will be partially inserted between the cellulose molecular chains to form a stable interpenetrating network structure. This structure not only provides a durable conductive channel, but also enhances the overall strength of the fiber.

[0059] Furthermore, the present invention introduces an activation treatment step, and optimizes the molecular arrangement of the PEDOT conductive layer by controlling the pH value and temperature. The buffer system formed by citric acid and sodium dihydrogen phosphate may promote the rearrangement of the PEDOT chain, increase the degree of π-π conjugation, and thus improve the conductivity. At the same time, this step may also trigger partial chemical cross-linking between PEDOT and cellulose molecules, further enhancing the stability of the conductive layer.

[0060] In the color fixing and antistatic finishing stage, the present invention cleverly utilizes the synergistic effect of quaternary ammonium salts, silicone softeners and nano-titanium dioxide. Quaternary ammonium salts not only provide additional electrostatic dissipation capabilities, but their long chain structures may also form physical entanglements with PEDOT, enhancing the stability of the overall structure. The silicon-oxygen bonds in the silicone softener form a hydrogen bond network with the cellulose molecules, which not only provides a soft feel but also plays a role in locking the conductive layer. Nano-titanium dioxide plays multiple roles in the system: its semiconductor properties contribute to the transmission and dissipation of charges; its photocatalytic properties give the fabric antibacterial and self-cleaning functions; at the same time, the nanoparticles may also act as a bridge between the PEDOT chain and the fiber molecules, further enhancing the stability of the overall structure.

[0061] This multi-component, multi-step synergistic mechanism not only achieves a significant improvement in antistatic performance and long-term maintenance, but also brings a series of unexpected technical effects. For example, the simultaneous improvement of fabric strength and softness may be due to the PEDOT network enhancing the toughness of the fiber, while the silicone softener provides surface lubrication. The significant synergistic antibacterial effect may be the result of the dual effects of quaternary ammonium salts destroying bacterial cell membranes and nano-titanium dioxide producing active oxygen.

[0062] In short, the present invention has cleverly designed a multifunctional and synergistic antistatic viscose fiber fabric preparation method by deeply understanding the basic principles of materials science, polymer chemistry and surface science. This method not only solves the problem of non-persistent effect and impact on other properties in traditional antistatic treatment, but also achieves the synergistic improvement of multiple functions such as antistatic, antibacterial, soft, and high strength. This innovation not only provides new ideas for the development of high-performance functional textiles, but also is expected to promote the textile industry to develop in a more environmentally friendly and efficient direction. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0064] Example 1

[0065] This embodiment provides an antistatic viscose fiber fabric and a preparation method thereof. The fabric is interwoven with warp yarn and weft yarn, wherein the warp yarn is modified viscose fiber with a linear density of 24TEX; the weft yarn is polyester fiber with a linear density of 19TEX*2. The warp yarn density is 132 yarns / cm, the weft yarn density is 70 yarns / cm, and the fabric structure is plain weave.

[0066] The preparation method of the antistatic viscose fiber fabric comprises the following steps:

[0067] (1) Viscose fiber pretreatment

[0068] First, the viscose fiber was immersed in a potassium hydroxide aqueous solution with a concentration of 0.85 wt%, treated at 22 ° C for 6 minutes, and stirred at 200 rpm. Secondly, the alkali-treated fiber was rinsed with deionized water, and then immersed in a hydrochloric acid aqueous solution with a concentration of 0.85 wt%, treated at 22 ° C for 4 minutes, and stirred at 200 rpm. Then, the acid-treated fiber was rinsed with deionized water again, immersed in a hydrogen peroxide aqueous solution with a concentration of 0.2 wt%, treated at 22 ° C for 3 minutes, and stirred at 200 rpm. Finally, the oxidized fiber was rinsed with deionized water, immersed in a sodium dodecylbenzene sulfonate aqueous solution with a concentration of 0.07 wt%, treated at 22 ° C for 1.5 minutes, and stirred at 200 rpm. The liquid ratio of each treatment step was 1:20. After all treatments were completed, the fiber was fully rinsed with deionized water to neutrality, and then vacuum dried at 65 ° C for 35 minutes.

[0069] Preferably, in the embodiments of the present invention, such pretreatment can effectively remove small molecular impurities in the fiber, increase the roughness of the fiber surface, and prepare for subsequent treatment. The addition of hydrogen peroxide can enhance the oxidation effect, while sodium dodecylbenzene sulfonate improves the wettability of the fiber surface.

[0070] (2) Conductive polymer coating

[0071] Next, prepare a polymerization reaction solution, which includes 8 parts of 3,4-ethylenedioxythiophene (EDOT), 20 parts of ferric chloride, 1 part of p-toluenesulfonic acid, 30 parts of ethanol and 41 parts of deionized water by weight. Dissolve EDOT in ethanol at 0°C. Then, dissolve ferric chloride and p-toluenesulfonic acid in deionized water. Immerse the pretreated viscose fiber in the ferric chloride solution with a liquid ratio of 1:25. Slowly add EDOT solution and react for 2 hours at a stirring speed of 150rpm. After the reaction, wash the fiber with ethanol and deionized water in turn, and vacuum dry it at 50°C for 2 hours.

[0072] It is worth noting that the use of EDOT can achieve better conductivity and stability, while p-toluenesulfonic acid as a dopant can further improve the conductivity. This in-situ interfacial polymerization method can form a uniform conductive polymer coating on the fiber surface, significantly improving the antistatic performance. p-toluenesulfonic acid mainly plays the role of a dopant in this reaction, which can further improve the conductivity of PEDOT.

[0073] In this process, PEDOT forms a conductive coating on the surface of viscose fiber. This coating is bonded to the fiber through hydrogen bonds, van der Waals forces and other interactions, thus giving the fiber antistatic properties.

[0074] The advantage of this in-situ polymerization method is that it can form a uniform and stable conductive layer on the fiber surface without significantly affecting the original properties of the fiber. At the same time, since the polymerization reaction takes place directly on the fiber surface, better adhesion and durability can be achieved.

[0075] p-Toluenesulfonic acid plays multiple important roles in this conductive polymer coating process: p-Toluenesulfonic acid can act as a dopant to improve the conductivity of poly(3,4-ethylenedioxythiophene) (PEDOT). It increases the conductivity of the polymer by providing additional charge carriers to the PEDOT backbone. p-Toluenesulfonic acid can adjust the acidity of the reaction system. The appropriate pH environment has an important influence on the polymerization rate of EDOT and the morphology of the polymer. It can help stabilize the generated PEDOT polymer and prevent excessive cross-linking or agglomeration of the polymer chains, thereby forming a more uniform conductive layer. p-Toluenesulfonic acid can improve the dispersibility of PEDOT in water, which helps to form a more uniform coating. It enhances the bonding between the PEDOT coating and the viscose fiber by interacting with the fiber surface. Although not the main oxidant, p-Toluenesulfonic acid promotes the polymerization reaction to some extent. p-Toluenesulfonic acid can affect the crystallinity and molecular arrangement of PEDOT, thereby affecting the morphology and properties of the final coating. Through these effects, p-toluenesulfonic acid not only improves the conductivity of PEDOT, but also may improve the uniformity, stability and bonding strength of the conductive coating with the fiber, thus having a positive impact on the performance of the entire antistatic viscose fiber.

[0076] (3) Activation treatment

[0077] Subsequently, an activation solution was prepared, which included 0.5 parts of citric acid, 0.3 parts of sodium dihydrogen phosphate, 0.1 parts of sodium dodecyl sulfate and 99.1 parts of deionized water by weight, and the pH was adjusted to 5.5. The coated fiber was immersed in the activation solution with a liquid ratio of 1:30, treated at 30°C for 4 minutes, and the stirring speed was 100rpm. The fiber was taken out, rinsed briefly with deionized water, and dried at 70°C for 20 minutes.

[0078] In this step, the buffer system formed by citric acid and sodium dihydrogen phosphate can accurately control the pH value, while the addition of sodium dodecyl sulfate improves the surface properties of the fiber, which is beneficial for subsequent processing.

[0079] (4) Color fixation

[0080] Next, a fixing solution was prepared, which included 2 parts of hexadecyltrimethylammonium bromide, 1 part of polyvinylpyrrolidone, 0.5 parts of polyethylene glycol (molecular weight 4000) and 96.5 parts of deionized water by weight. The activated fiber was immersed in the fixing solution with a liquid ratio of 1:20 and immersed at room temperature for 90 seconds. A rolling mill was used for pre-rolling, rolling and pressing twice at a pressure of 0.3 MPa, and then immersed again for 90 seconds, rolled and pressed again twice at a pressure of 0.3 MPa, and dried at 90°C for 5 minutes.

[0081] In the embodiment of the present invention, the addition of polyvinyl pyrrolidone and polyethylene glycol can enhance the color fixing effect and improve the durability of the antistatic performance. This multi-component synergistic effect not only improves the antistatic performance, but also gives the fabric additional functional properties.

[0082] (5) Weaving

[0083] The treated viscose fiber was used as the warp yarn and the polyester fiber was used as the weft yarn, and the weaving was carried out on a shuttleless loom. The weaving speed was 200 m / min and the warp tension was controlled at 250 cN.

[0084] (6) Antistatic finishing

[0085] Finally, an antistatic finishing solution was prepared, which included 2 parts by weight of a quaternary ammonium salt (dihydrogenated fat dimethyl ammonium chloride, trade name 2HT-75), 0.5 parts of silicone softener (trade name Magnasoft HSSD, Dow Chemical), 0.3 parts of cross-linking agent (N,N'-methylenebisacrylamide), 0.1 parts of nonionic surfactant (nonylphenol polyoxyethylene ether NP-10), 0.5 parts of polyvinyl pyrrolidone, 0.1 parts of nano titanium dioxide and 96.5 parts of deionized water.

[0086] First, dissolve the quaternary ammonium salt, nonionic surfactant and polyvinyl pyrrolidone in deionized water and stir evenly. Secondly, emulsify the silicone softener and add it to the above solution. Then, dissolve the crosslinking agent and add it to the mixed solution. Thirdly, disperse the nano titanium dioxide in a small amount of water, add it to the mixed solution after ultrasonic treatment for 10 minutes, adjust the pH to 5.5, and stir evenly.

[0087] Next, immerse the fabric in the finishing liquid with a liquid ratio of 1:15 and immerse it at room temperature for 3 minutes. Then, use a padder to roll it twice with a pressure of 0.4MPa and a rolling rate of 80%. Again, use infrared pre-drying at a temperature of 80°C for 2 minutes. Then, use a tension setting machine at a temperature of 140°C for 60 seconds to keep the fabric width stable and the tension controlled at 300N / m. Then, use a cold air blower to cool the fabric to room temperature for 3 minutes. Finally, soak the treated fabric in warm water at 50°C for 1 minute to remove unfixed chemicals, and then dry it at 80°C for 3 minutes.

[0088] In the embodiments of the present invention, the synergistic effect of quaternary ammonium salt and nano titanium dioxide can provide more durable antistatic performance. At the same time, the combination of silicone softener and polyvinyl pyrrolidone does not affect the antistatic performance while providing a soft feel. In addition, nano titanium dioxide also gives the fabric certain antibacterial and self-cleaning functions.

[0089] Example 2

[0090] This embodiment provides another antistatic viscose fiber fabric and its preparation method. The fabric is interwoven with warp yarn and weft yarn, wherein the warp yarn is modified viscose fiber with a linear density of 24TEX; the weft yarn is polyester fiber with a linear density of 19TEX*2. The warp yarn density is 135 yarns / cm, the weft yarn density is 73 yarns / cm, and the fabric structure is plain weave.

[0091] The preparation method of the antistatic viscose fiber fabric comprises the following steps:

[0092] (1) Viscose fiber pretreatment

[0093] First, the viscose fiber was immersed in a potassium hydroxide aqueous solution with a concentration of 0.9 wt%, treated at 23 ° C for 7 minutes, and stirred at 220 rpm. Secondly, the alkali-treated fiber was rinsed with deionized water, and then immersed in a hydrochloric acid aqueous solution with a concentration of 0.9 wt%, treated at 23 ° C for 4.5 minutes, and stirred at 220 rpm. Then, the acid-treated fiber was rinsed with deionized water again, immersed in a hydrogen peroxide aqueous solution with a concentration of 0.25 wt%, treated at 23 ° C for 3.5 minutes, and stirred at 220 rpm. Finally, the oxidized fiber was rinsed with deionized water, immersed in a sodium dodecylbenzene sulfonate aqueous solution with a concentration of 0.08 wt%, treated at 23 ° C for 1.7 minutes, and stirred at 220 rpm. The liquid ratio of each treatment step was 1:20. After all treatments were completed, the fiber was fully rinsed with deionized water to neutrality, and then vacuum dried at 67 ° C for 37 minutes.

[0094] (2) Conductive polymer coating

[0095] Next, prepare a polymerization reaction solution, which includes 10 parts of 3,4-ethylenedioxythiophene (EDOT), 22.5 parts of ferric chloride, 1.5 parts of p-toluenesulfonic acid, 32.5 parts of ethanol and 33.5 parts of deionized water by weight. Dissolve EDOT in ethanol at 2.5°C. Then, dissolve ferric chloride and p-toluenesulfonic acid in deionized water. Immerse the pretreated viscose fiber in the ferric chloride solution with a liquid ratio of 1:25. Slowly add EDOT solution and react for 2.5 hours at a stirring speed of 175rpm. After the reaction, wash the fiber with ethanol and deionized water in turn, and vacuum dry it at 55°C for 2.5 hours.

[0096] (3) Activation treatment

[0097] Subsequently, an activation solution was prepared, which included 0.75 parts of citric acid, 0.4 parts of sodium dihydrogen phosphate, 0.15 parts of sodium dodecyl sulfate and 98.7 parts of deionized water by weight, and the pH was adjusted to 6.0. The coated fiber was immersed in the activation solution with a liquid ratio of 1:30, treated at 35°C for 4.5 minutes, and the stirring speed was 125rpm. The fiber was taken out, rinsed briefly with deionized water, and dried at 75°C for 25 minutes.

[0098] (4) Color fixation

[0099] Next, a fixing solution was prepared, which included 2.5 parts of hexadecyltrimethylammonium bromide, 1.5 parts of polyvinylpyrrolidone, 0.75 parts of polyethylene glycol (molecular weight 4000) and 95.25 parts of deionized water by weight. The activated fiber was immersed in the fixing solution with a liquid ratio of 1:20 and immersed at room temperature for 95 seconds. A rolling mill was used for pre-rolling, rolling and pressing twice at a pressure of 0.35 MPa, and then immersed again for 95 seconds, and rolled and pressed again twice at a pressure of 0.35 MPa, and dried at 95°C for 5.5 minutes.

[0100] (5) Weaving

[0101] The treated viscose fiber was used as the warp yarn and the polyester fiber was used as the weft yarn, and the weaving was performed on a shuttleless loom. The weaving speed was 210 m / min and the warp tension was controlled at 275 cN.

[0102] (6) Antistatic finishing

[0103] Finally, an antistatic finishing liquid is prepared, which includes, by weight, 2.5 parts of quaternary ammonium salt, 0.75 parts of silicone softener, 0.4 parts of cross-linking agent, 0.15 parts of nonionic surfactant, 0.75 parts of polyvinyl pyrrolidone, 0.2 parts of nano titanium dioxide and 95.25 parts of deionized water.

[0104] The finishing solution was prepared and the finishing treatment was carried out according to the method described in Example 1, but different parameters were used in the following steps: the fabric was immersed in the finishing solution, the liquid ratio was 1:15, and the fabric was immersed at room temperature for 4 minutes. Then, the fabric was rolled using a rolling car, rolled twice, the pressure was 0.45MPa, and the rolling rate was 85%. Again, infrared pre-drying was used at a temperature of 85°C and a time of 2.5 minutes. Next, a tension setting machine was used at a temperature of 145°C and a time of 75 seconds to keep the fabric width stable and the tension was controlled at 350N / m. Then, a cold air blower was used to cool the fabric to room temperature for 4 minutes. Finally, the treated fabric was rinsed in warm water at 55°C for 1.5 minutes to remove unfixed chemicals, and then dried at 85°C for 4 minutes.

[0105] Example 3

[0106] This embodiment provides a third antistatic viscose fiber fabric and a preparation method thereof. The fabric is interwoven with warp yarn and weft yarn, wherein the warp yarn is modified viscose fiber with a linear density of 24TEX; the weft yarn is polyester fiber with a linear density of 19TEX*2. The warp yarn density is 138 yarns / cm, the weft yarn density is 76 yarns / cm, and the fabric structure is plain weave.

[0107] The preparation method of the antistatic viscose fiber fabric comprises the following steps:

[0108] (1) Viscose fiber pretreatment

[0109] First, the viscose fiber was immersed in a potassium hydroxide aqueous solution with a concentration of 1.0 wt%, treated at 24 ° C for 8 minutes, and stirred at a speed of 240 rpm. Secondly, the alkali-treated fiber was rinsed with deionized water and then immersed in a hydrochloric acid aqueous solution with a concentration of 1.0 wt%, treated at 24 ° C for 5 minutes, and stirred at a speed of 240 rpm. Then, the acid-treated fiber was rinsed with deionized water again, immersed in a hydrogen peroxide aqueous solution with a concentration of 0.3 wt%, treated at 24 ° C for 4 minutes, and stirred at a speed of 240 rpm. Finally, the oxidized fiber was rinsed with deionized water, immersed in a sodium dodecylbenzene sulfonate aqueous solution with a concentration of 0.1 wt%, treated at 24 ° C for 2 minutes, and stirred at a speed of 240 rpm. The liquid ratio of each treatment step was 1:20. After all treatments were completed, the fiber was fully rinsed with deionized water to neutrality and then vacuum dried at 70 ° C for 40 minutes.

[0110] (2) Conductive polymer coating

[0111] Next, prepare a polymerization reaction solution, which includes 12 parts of 3,4-ethylenedioxythiophene (EDOT), 25 parts of ferric chloride, 2 parts of p-toluenesulfonic acid, 35 parts of ethanol and 26 parts of deionized water by weight. Dissolve EDOT in ethanol at 5°C. Then, dissolve ferric chloride and p-toluenesulfonic acid in deionized water. Immerse the pretreated viscose fiber in the ferric chloride solution with a liquid ratio of 1:25. Slowly add EDOT solution and react for 3 hours with a stirring speed of 200rpm. After the reaction, wash the fiber with ethanol and deionized water in turn, and vacuum dry it at 60°C for 3 hours.

[0112] Preferably, in the embodiments of the present invention, such high concentration of EDOT and prolonged reaction time can form a thicker conductive polymer layer, further improving the conductivity and antistatic properties of the fiber.

[0113] (3) Activation treatment

[0114] Subsequently, an activation solution was prepared, which included 1.0 parts of citric acid, 0.5 parts of sodium dihydrogen phosphate, 0.2 parts of sodium dodecyl sulfate and 98.3 parts of deionized water by weight, and the pH was adjusted to 6.5. The coated fiber was immersed in the activation solution with a liquid ratio of 1:30, treated at 40°C for 5 minutes, and the stirring speed was 150rpm. The fiber was taken out, rinsed briefly with deionized water, and dried at 80°C for 30 minutes.

[0115] Notably, this stronger acidic environment and higher processing temperature can further activate the conductive polymer layer and enhance its conductive properties.

[0116] (4) Color fixation

[0117] Next, a fixing solution was prepared, which included 3 parts of hexadecyltrimethylammonium bromide, 2 parts of polyvinylpyrrolidone, 1 part of polyethylene glycol (molecular weight 4000) and 94 parts of deionized water by weight. The activated fiber was immersed in the fixing solution with a liquid ratio of 1:20 and immersed at room temperature for 100 seconds. The fiber was pre-rolled using a rolling mill, rolled twice at a pressure of 0.4 MPa, immersed again for 100 seconds, rolled twice again at a pressure of 0.4 MPa, and dried at 100°C for 6 minutes.

[0118] In the embodiments of the present invention, increasing the content of each component in the fixing solution can improve the fixing effect and further enhance the durability of the antistatic performance.

[0119] (5) Weaving

[0120] The treated viscose fiber was used as the warp yarn and the polyester fiber was used as the weft yarn, and the weaving was carried out on a shuttleless loom. The weaving speed was 220 m / min and the warp tension was controlled at 300 cN.

[0121] (6) Antistatic finishing

[0122] Finally, an antistatic finishing liquid is prepared, which includes, by weight, 3 parts of quaternary ammonium salt, 1 part of silicone softener, 0.5 parts of cross-linking agent, 0.2 parts of nonionic surfactant, 1 part of polyvinyl pyrrolidone, 0.3 parts of nano titanium dioxide and 94 parts of deionized water.

[0123] The finishing solution was prepared and the finishing treatment was carried out according to the method described in Example 1, but different parameters were used in the following steps: the fabric was immersed in the finishing solution, the liquid ratio was 1:15, and the fabric was immersed at room temperature for 5 minutes. Then, the fabric was rolled using a rolling car, which was rolled twice with a pressure of 0.5 MPa and a rolling rate of 90%. Again, infrared pre-drying was used at a temperature of 90°C for 3 minutes. Next, a tension setting machine was used at a temperature of 150°C for 90 seconds to keep the fabric width stable and the tension was controlled at 400N / m. Then, a cold air blower was used to cool the fabric to room temperature for 5 minutes. Finally, the treated fabric was rinsed in warm water at 60°C for 2 minutes to remove unfixed chemicals, and then dried at 90°C for 5 minutes.

[0124] Example 4

[0125] This embodiment provides a fourth antistatic viscose fiber fabric and a preparation method thereof. The fabric is interwoven with warp yarn and weft yarn, wherein the warp yarn is modified viscose fiber with a linear density of 24TEX; the weft yarn is polyester fiber with a linear density of 19TEX*2. The warp yarn density is 136 yarns / cm, the weft yarn density is 74 yarns / cm, and the fabric structure is plain weave.

[0126] The preparation method of the antistatic viscose fiber fabric comprises the following steps:

[0127] (1) Viscose fiber pretreatment

[0128] Step (1) pretreatment of viscose fiber: First, the viscose fiber is immersed in a potassium hydroxide aqueous solution with a concentration of 0.95 weight %, and treated at 21° C. for 6.5 minutes with a stirring speed of 210 rpm. Secondly, the alkali-treated fiber is rinsed with deionized water, and then immersed in a hydrochloric acid aqueous solution with a concentration of 0.95 weight %, and treated at 21° C. for 4 minutes with a stirring speed of 210 rpm. Then, the acid-treated fiber is rinsed with deionized water again, immersed in a hydrogen peroxide aqueous solution with a concentration of 0.22 weight %, and treated at 21° C. for 3.2 minutes with a stirring speed of 210 rpm. Finally, the oxidized fiber is rinsed with deionized water, immersed in a sodium dodecylbenzene sulfonate aqueous solution with a concentration of 0.075 weight %, and treated at 21° C. for 1.6 minutes with a stirring speed of 210 rpm. The liquid ratio of each treatment step is 1:20. After completing all treatments, the fiber is fully rinsed with deionized water to neutrality, and then vacuum dried at 63° C. for 33 minutes.

[0129] (2) Conductive polymer coating

[0130] Next, prepare a polymerization reaction solution, which includes 11 parts of 3,4-ethylenedioxythiophene (EDOT), 23 parts of ferric chloride, 1.7 parts of p-toluenesulfonic acid, 33 parts of ethanol and 31.3 parts of deionized water by weight. Dissolve EDOT in ethanol at 3°C. Then, dissolve ferric chloride and p-toluenesulfonic acid in deionized water. Immerse the pretreated viscose fiber in the ferric chloride solution with a liquid ratio of 1:25. Slowly add EDOT solution, react for 2.7 hours, and stir at 180rpm. After the reaction, wash the fiber with ethanol and deionized water in turn, and vacuum dry it at 57°C for 2.7 hours.

[0131] (3) Activation treatment

[0132] Subsequently, an activation solution was prepared, which included 0.8 parts of citric acid, 0.45 parts of sodium dihydrogen phosphate, 0.17 parts of sodium dodecyl sulfate and 98.58 parts of deionized water by weight, and the pH was adjusted to 6.2. The coated fiber was immersed in the activation solution with a liquid ratio of 1:30, treated at 37°C for 4.7 minutes, and the stirring speed was 135rpm. The fiber was taken out, rinsed briefly with deionized water, and dried at 77°C for 27 minutes.

[0133] (4) Color fixation

[0134] Next, a fixing solution was prepared, which included 2.7 parts of hexadecyltrimethylammonium bromide, 1.7 parts of polyvinylpyrrolidone, 0.8 parts of polyethylene glycol (molecular weight 4000) and 94.8 parts of deionized water by weight. The activated fiber was immersed in the fixing solution with a liquid ratio of 1:20 and immersed at room temperature for 97 seconds. A rolling mill was used for pre-rolling, rolling and pressing twice at a pressure of 0.37 MPa, and then immersed again for 97 seconds, rolled and pressed again twice at a pressure of 0.37 MPa, and dried at 97°C for 5.7 minutes.

[0135] (5) Weaving

[0136] The treated viscose fiber was used as the warp yarn and the polyester fiber was used as the weft yarn, and the weaving was performed on a shuttleless loom. The weaving speed was 215 m / min and the warp tension was controlled at 285 cN.

[0137] (6) Antistatic finishing

[0138] Finally, an antistatic finishing liquid is prepared, which includes, by weight, 2.7 parts of quaternary ammonium salt, 0.85 parts of silicone softener, 0.45 parts of cross-linking agent, 0.17 parts of nonionic surfactant, 0.85 parts of polyvinyl pyrrolidone, 0.25 parts of nano titanium dioxide and 94.73 parts of deionized water.

[0139] The finishing liquid was prepared and the finishing treatment was carried out according to the method described in Example 1, but different parameters were used in the following steps: the fabric was immersed in the finishing liquid, the liquid ratio was 1:15, and the fabric was immersed at room temperature for 4.5 minutes. Then, the fabric was rolled using a rolling car, rolled twice, the pressure was 0.47MPa, and the rolling rate was 87%. Again, infrared pre-drying was used at a temperature of 87°C and a time of 2.7 minutes. Then, a tension setting machine was used at a temperature of 147°C and a time of 80 seconds to keep the fabric width stable and the tension was controlled at 370N / m. Then, a cold air blower was used to cool the fabric to room temperature for 4.5 minutes. Finally, the treated fabric was rinsed in warm water at 57°C for 1.7 minutes to remove unfixed chemicals, and then dried at 87°C for 4.5 minutes.

[0140] Through the above four examples, we can see the range of variation of various parameters and component contents in the method of the present invention, as well as their influence on the performance of the final product. This multi-component, multi-step synergistic effect not only improves the antistatic performance, but also gives the fabric additional functional properties, such as softness, durability and antibacterial properties.

[0141] Comparative Example 1: Antistatic viscose fabric without conductive polymer coating

[0142] This comparative example is intended to verify the effect of conductive polymer coating on antistatic performance and is compared with Example 1.

[0143] The preparation method comprises the following steps:

[0144] (1) Viscose fiber pretreatment

[0145] The pretreatment was carried out according to the method in Example 1.

[0146] (2) Weaving

[0147] The pretreated viscose fiber was directly used as the warp yarn, and the polyester fiber was used as the weft yarn. A shuttleless loom was used for weaving, and the weaving parameters were the same as those in Example 1.

[0148] (3) Antistatic finishing

[0149] The same antistatic finishing liquid composition and process parameters as those in Example 1 were used for finishing.

[0150] By comparison, it is found that the antistatic performance of the fabric without the conductive polymer coating step is significantly lower than that of Example 1. This verifies the key role of conductive polymer coating in improving the antistatic performance of viscose fiber. Preferably, in the present invention, the uniform conductive layer formed by the conductive polymer on the fiber surface not only improves the conductivity of the fiber, but also produces a synergistic effect with the subsequent antistatic finishing, significantly enhancing the overall antistatic performance of the fabric.

[0151] Comparative Example 2: Antistatic viscose fabric without activation treatment

[0152] This comparative example is intended to verify the effect of activation treatment on antistatic performance and is compared with Example 2.

[0153] The preparation method comprises the following steps:

[0154] (1) Viscose fiber pretreatment

[0155] (2) Conductive polymer coating

[0156] These two steps are carried out according to the method in Example 2.

[0157] (3) Color fixation

[0158] After the conductive polymer is coated, the color fixing treatment is directly performed, skipping the activation step. The color fixing treatment parameters are the same as those in Example 2.

[0159] (4) Weaving

[0160] (5) Antistatic finishing

[0161] These two steps are carried out according to the method in Example 2.

[0162] The study found that the durability of the antistatic performance of the fabric without activation treatment was significantly lower than that of Example 2. This shows that the activation treatment plays an important role in enhancing the stability of the conductive polymer layer and improving its bonding with the fiber. Furthermore, the slightly acidic environment generated by the activation treatment may promote the rearrangement of the conductive polymer chain and optimize its conductive properties, thereby forming a better synergistic effect with the subsequent color fixation and antistatic finishing.

[0163] Comparative Example 3: Antistatic viscose fabric using only quaternary ammonium salt

[0164] This comparative example is intended to verify the synergistic effect of the multi-component antistatic finishing liquid and is compared with Example 3.

[0165] The preparation method comprises the following steps:

[0166] (1) Viscose fiber pretreatment

[0167] (2) Conductive polymer coating

[0168] (3) Activation treatment

[0169] (4) Color fixation

[0170] (5) Weaving

[0171] These steps were carried out according to the method in Example 3.

[0172] (6) Antistatic finishing

[0173] The antistatic finishing liquid was prepared, which only contained 3 parts of quaternary ammonium salt and 97 parts of deionized water, and no other components were added. The finishing process parameters were the same as those in Example 3.

[0174] The results show that the antistatic performance, softness and durability of the fabric using only quaternary ammonium salt are all lower than those in Example 3. This fully demonstrates the synergistic effect of the multi-component antistatic finishing liquid in the present invention. Among them, the organosilicon softener provides a good feel, the cross-linking agent enhances the firmness of the finishing effect, and the nano-titanium dioxide forms a unique synergistic antistatic mechanism with the quaternary ammonium salt, which significantly improves the comprehensive performance of the fabric.

[0175] Comparative Example 4: Antistatic viscose fabric without nano titanium dioxide

[0176] This comparative example is intended to verify the role of nano titanium dioxide in antistatic performance and is compared with Example 4.

[0177] The preparation method is the same as that of Example 4, but nano titanium dioxide is not added to the antistatic finishing liquid, and other components remain unchanged.

[0178] The study found that the durability of the antistatic performance and the antibacterial performance of the fabric lacking nano-titanium dioxide were lower than those in Example 4. This verifies the multiple roles of nano-titanium dioxide in the present invention: first, it forms a synergistic antistatic system with quaternary ammonium salts, which improves the durability of the antistatic effect; second, its photocatalytic properties give the fabric certain antibacterial and self-cleaning functions. Preferably, the presence of nano-titanium dioxide may also enhance the binding force between the finishing liquid and the fiber surface, further improving the durability of the finishing effect.

[0179] Comparative Example 5: Antistatic viscose fabric using conventional conductive polymer

[0180] This comparative example is intended to verify the superiority of 3,4-ethylenedioxythiophene (EDOT) as a conductive polymer monomer, and is compared with Example 1.

[0181] The preparation method is similar to that of Example 1, but in the conductive polymer coating step, EDOT is replaced by the same weight portion of aniline. The other steps and parameters remain unchanged.

[0182] The results show that the conductivity and stability of the polyaniline conductive layer prepared using aniline are lower than those of the poly (3,4-ethylenedioxythiophene) (PEDOT) conductive layer prepared using EDOT. This proves the unique advantages of EDOT as a conductive polymer monomer: PEDOT has higher conductivity, better environmental stability, and stronger bonding with the fiber substrate. Furthermore, the presence of PEDOT may provide a better foundation for subsequent activation and antistatic finishing, thereby achieving better overall performance.

[0183] Comparative Example 6: Antistatic viscose fabric without color fixing treatment

[0184] This comparative example is intended to verify the effect of the fixing treatment on the durability of the antistatic performance, and is compared with Example 2.

[0185] The preparation method comprises the following steps:

[0186] (1) Viscose fiber pretreatment

[0187] (2) Conductive polymer coating

[0188] (3) Activation treatment

[0189] These three steps are carried out according to the method in Example 2.

[0190] (4) Weaving

[0191] After the activation treatment, weaving was carried out directly, skipping the color fixing treatment step. The weaving parameters were the same as those in Example 2.

[0192] (5) Antistatic finishing

[0193] Antistatic finishing was carried out according to the method in Example 2.

[0194] The study found that the antistatic performance of the fabric without color fixing treatment was significantly lower than that of Example 2. This fully demonstrates the important role of color fixing treatment in enhancing the stability of the conductive polymer layer and improving its bonding with the fiber. Preferably, the hexadecyltrimethylammonium bromide, polyvinylpyrrolidone and polyethylene glycol used in the color fixing treatment form a composite color fixing system, which not only enhances the stability of the conductive polymer layer, but also provides a good foundation for the subsequent antistatic finishing, thereby achieving long-lasting antistatic performance.

[0195] Through these six comparative examples, the importance of each key step and component in the present invention and their synergistic effect are fully verified. The results show that the multi-step, multi-component antistatic viscose fiber fabric preparation method proposed in the present invention has significant creativity and superiority, and can produce high-quality textiles with excellent antistatic performance, good hand feel and durability.

[0196] In order to comprehensively evaluate the effectiveness and superiority of the antistatic viscose fiber fabric and the preparation method thereof of the present invention, a series of performance test experiments were designed.

[0197] First, the antistatic performance test was conducted. The test adopted the GB / T12703.1-2008 standard method and used an electrostatic decay tester to measure the electrostatic decay time of the fabric. The test conditions were a temperature of 20±2°C and a relative humidity of 65±2%. Each sample was tested 5 times and the average value was taken. Secondly, the washability of the fabric was evaluated. According to the GB / T3921-2008 standard, the fabric was washed 50 times, and the electrostatic decay time was measured after each wash to evaluate the durability of the antistatic performance.

[0198] Next, the softness of the fabric was tested. The GB / T18318-2001 ring stiffness method was used and the YG022C fabric softness tester was used for measurement. The test conditions were the same as the antistatic performance test. Then, to evaluate the antibacterial properties of the fabric, the antibacterial activity was determined according to the GB / T20944.3-2008 standard, with Escherichia coli and Staphylococcus aureus as indicator bacteria.

[0199] In addition, the breaking strength test of the fabric was also conducted, using the GB / T3923.1-2013 standard and the YG026 electronic fabric strength tester. Finally, in order to evaluate the environmental impact of the invention, a simplified life cycle assessment was conducted according to the GB / T24040-2008 standard.

[0200] Table 1 shows the test results of all embodiments and comparative examples:

[0201] Table 1: Test results of antistatic viscose fabric performance

[0202]

[0203] According to the test results, Example 3 exhibits the best comprehensive performance and is the best embodiment of the present invention. It has the shortest static decay time, the best water washability, the highest antibacterial rate and breaking strength, while maintaining good softness and low environmental impact.

[0204] After in-depth analysis of the test data, it is found that the present invention has the following unexpected technical effects:

[0205] 1. Ultra-long-lasting antistatic performance: The static decay time of Examples 1-4 after 50 washes is still much lower than that of the comparative example, which indicates that the multi-step treatment method of the present invention forms a unique embedded antistatic structure. The conductive polymer may penetrate into the fiber and form a stable physical or chemical bond with the fiber molecules, thereby achieving ultra-long-lasting antistatic performance.

[0206] 2. Synergistic improvement of softness and strength: Generally, improving fabric strength will sacrifice softness. However, the present invention improves the breaking strength while maintaining or even slightly improving the softness. This may be because the presence of the conductive polymer changes the microstructure of the fiber and increases the toughness of the fiber, while the silicone softener forms an ultra-thin lubricating layer on the fiber surface.

[0207] 3. Significant synergistic antibacterial effect: The antibacterial rate of the embodiment is much higher than that of using quaternary ammonium salt (Comparative Example 3) or nano titanium dioxide (Comparative Example 4) alone. This shows that there is a strong synergistic effect between quaternary ammonium salt and nano titanium dioxide. The possible mechanism is that quaternary ammonium salt destroys bacterial cell membranes, while nano titanium dioxide produces active oxygen under light, and the synergistic effect of the two greatly enhances the antibacterial effect.

[0208] 4. Environmental friendliness: The environmental impact index of all examples is lower than that of the comparative example, which shows that the multi-step treatment method of the present invention not only improves fabric performance but also reduces the overall environmental impact. This may be because the efficient treatment process reduces the amount of chemicals used and increases the service life of the product, thereby reducing the environmental burden of the entire life cycle.

[0209] 5. Multifunctional synergistic effect: The present invention achieves the synergistic improvement of multiple functions such as antistatic, antibacterial, soft, and high strength, which is difficult to achieve in traditional single-function processing. This multifunctional synergistic effect may be due to the interaction of each component at the molecular level, forming a complex but highly ordered functional network structure.

[0210] In summary, the present invention achieves a comprehensive improvement in the performance of antistatic viscose fiber fabrics through a carefully designed multi-step treatment method and multi-component formula, showing excellent comprehensive performance and environmental friendliness. These unexpected technical effects not only prove the innovation and superiority of the present invention, but also provide new ideas and directions for the development of high-performance functional textiles.

[0211] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An antistatic viscose fiber fabric, characterized in that: The fabric is formed by interweaving warp yarns and weft yarns, wherein: The warp yarn is modified viscose fiber with a linear density of 24TEX; The weft yarn is polyester fiber with a linear density of 19TEX*2; Warp density is 132-138 yarns / cm; The weft yarn density is 70-76 yarns / cm; The fabric structure is plain weave; The fabric is subjected to antistatic finishing, and its surface is coated with an antistatic finishing liquid, wherein the antistatic finishing liquid comprises the following components by weight: 2-3 parts of quaternary ammonium salt, 0.5-1 parts of silicone softener, 0.3-0.5 parts of cross-linking agent, 0.1-0.2 parts of non-ionic surfactant, 0.5-1 parts of polyvinyl pyrrolidone, 0.1-0.3 parts of nano titanium dioxide and 94.9-96.5 parts of deionized water.

2. The antistatic viscose fiber fabric according to claim 1, characterized in that: The quaternary ammonium salt is dihydrogenated fatty dimethyl ammonium chloride.

3. The antistatic viscose fiber fabric according to claim 1, characterized in that: The organic silicone softener is Magnasoft HSSD.

4. The antistatic viscose fiber fabric according to claim 1, characterized in that: The cross-linking agent is N,N'-methylenebisacrylamide.

5. The antistatic viscose fiber fabric according to claim 1, characterized in that: The nonionic surfactant is nonylphenol polyoxyethylene ether NP-10.

6. The method for preparing the antistatic viscose fiber fabric according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) Pretreatment of viscose fiber; (2) Conductive polymer coating; (3) Activation treatment; (4) Color fixation treatment; (5) Weaving; (6) Antistatic finishing.

7. The preparation method according to claim 6, characterized in that: The specific steps of the viscose fiber pretreatment in step (1) are as follows: First, the viscose fiber is immersed in a potassium hydroxide aqueous solution with a concentration of 0.7-1.0 weight % and treated at 20-25° C. for 5-8 minutes; Secondly, immersing the alkali-treated fiber in a 0.7-1.0 wt% hydrochloric acid aqueous solution at 20-25° C. for 3-5 minutes; Then, the acid-treated fiber is immersed in a 0.1-0.3 wt% aqueous hydrogen peroxide solution at 20-25° C. for 2-4 minutes; Finally, the oxidized fiber is immersed in a sodium dodecylbenzene sulfonate aqueous solution with a concentration of 0.05-0.1 wt % and treated at 20-25° C. for 1-2 minutes; After each treatment step, the fibers were rinsed with deionized water; After all treatments are completed, vacuum dry at 60-70°C for 30-40 minutes.

8. The preparation method according to claim 6, characterized in that: The specific steps of the step (2) of coating with a conductive polymer are: First, a polymerization reaction solution is prepared, which includes 8-12 parts by weight of 3,4-ethylenedioxythiophene, 20-25 parts by weight of ferric chloride, 1-2 parts by weight of p-toluenesulfonic acid, 30-35 parts by weight of ethanol and 26-41 parts by weight of deionized water; Secondly, dissolving 3,4-ethylenedioxythiophene in ethanol at 0-5°C; Then, ferric chloride and p-toluenesulfonic acid were dissolved in deionized water; Again, the pretreated viscose fiber was immersed in a ferric chloride solution with a liquid ratio of 1:25; Then, slowly add 3,4-ethylenedioxythiophene solution dropwise, react for 2-3 hours, and stir at 150-200 rpm; Finally, after the reaction, the fiber was washed with ethanol and deionized water in turn and dried under vacuum at 50-60°C for 2-3 hours.

9. The preparation method according to claim 6, characterized in that: The specific steps of the activation treatment in step (3) and the color fixing treatment in step (4) are as follows: First, prepare an activation solution, which includes 0.5-1.0 parts of citric acid, 0.3-0.5 parts of sodium dihydrogen phosphate, 0.1-0.2 parts of sodium lauryl sulfate and 98.3-99.1 parts of deionized water by weight, and adjust the pH to 5.5-6.5; Secondly, immerse the coated fiber in the activation solution with a liquid ratio of 1:30, treat at 30-40°C for 4-5 minutes, and stir at a speed of 100-150rpm; Then, take out the fiber, rinse it briefly with deionized water, and dry it at 70-80℃ for 20-30 minutes; Next, a fixing solution is prepared, which includes, by weight, 2-3 parts of hexadecyltrimethylammonium bromide, 1-2 parts of polyvinylpyrrolidone, 0.5-1 parts of polyethylene glycol, molecular weight 4000, and 94-96.5 parts of deionized water; Next, immerse the activated fiber in the fixing solution at a liquid ratio of 1:20 for 90-100 seconds at room temperature; Finally, use a rolling mill for pre-rolling, rolling twice at a pressure of 0.3-0.4 MPa, immerse again for 90-100 seconds, roll twice again at a pressure of 0.3-0.4 MPa, and dry at 90-100°C for 5-6 minutes.

10. The preparation method according to claim 6, characterized in that: The specific steps of the antistatic finishing in step (6) are: First, prepare an antistatic finishing solution by dissolving quaternary ammonium salt, nonionic surfactant and polyvinyl pyrrolidone in deionized water and stirring evenly; Secondly, emulsify the silicone softener and add it into the above solution; Then, the cross-linking agent is dissolved and added to the mixture; Again, disperse the nano-titanium dioxide in a small amount of water, add the mixed solution after ultrasonic treatment for 10 minutes, adjust the pH to 5.5-6.5, and stir evenly; Next, immerse the fabric in the finishing solution at a liquid ratio of 1:15 and soak for 3-5 minutes at room temperature; Then, the rolling mill is used for rolling twice, with a pressure of 0.4-0.5MPa and a rolling rate of 80-90%; Again, infrared pre-drying is used at a temperature of 80-90°C for 2-3 minutes; Next, a tension setting machine is used with a temperature of 140-150°C for 60 to 90 seconds to keep the fabric width stable and the tension controlled at 300-400N / m. Then, use a cold air blower to cool the fabric to room temperature for 3-5 minutes; Finally, the treated fabric is rinsed in warm water at 50-60°C for 1-2 minutes to remove unfixed chemicals, and then dried at 80-90°C for 3-5 minutes.

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