Antibacterial anti-static polyester fiber, preparation method thereof and garment fabric

Abstract

The invention relates to the technical field of functional fiber materials, in particular to an antibacterial and anti-static polyester fiber, a preparation method thereof and a garment fabric, and aims at solving the problems that existing polyester fibers are prone to breeding bacteria and generating static electricity. The fiber takes modified polyester as a matrix, has efficient and lasting double-effect antibacterial property, has dissolution sterilization of inorganic antibacterial agent zinc / manganese ions, also combines the contact antibacterial ability of organic antibacterial monomers, can realize broad-spectrum and efficient antibacterial effect by multiple action mechanisms, and is not easy to induce bacterial drug resistance; the functional components are chemically bonded or stably loaded in the fiber, the washing resistance is excellent, and the long-acting antibacterial effect can be achieved; by introducing the antistatic agent, a conductive, moisture-absorbing and conductive path is constructed in the fiber, the antistatic fiber has lasting antistatic capability and washing resistance, and is not easily attenuated due to friction or use, and by adding the modified white carbon black and silicon nitride, functions are provided, reinforcing and toughening effects are achieved, and the wear resistance and dimensional stability of the fiber are improved.

Description

Technical Field

[0001] This invention relates to the field of functional fiber materials technology, specifically to an antibacterial and antistatic polyester fiber, its preparation method, and clothing fabric. Background Technology

[0002] With the fast pace of modern life, people have increasingly higher demands for everyday consumer goods, especially in the selection of clothing fabrics. They not only pursue aesthetics and comfort but also pay attention to health and safety. Although traditional polyester fibers have good abrasion resistance and wrinkle resistance, they are prone to bacterial growth and static electricity in daily life, which makes people feel uncomfortable during use.

[0003] Therefore, the antibacterial and antistatic polyester fiber and its preparation method, as well as the clothing fabric of the present invention, are of great significance in the field of functional fiber material technology. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide an antibacterial and antistatic polyester fiber and its preparation method, as well as a clothing fabric, which solves the problem that existing polyester fibers are prone to bacterial growth and static electricity generation.

[0005] The objective of this invention can be achieved through the following technical solutions: In a first aspect, this application provides an antibacterial and antistatic polyester fiber, comprising the following components in parts by weight: 70-85 parts modified polyester, 5-15 parts antistatic agent, 3-8 parts modified silica, 1-3 parts silicon nitride, 1-4 parts silane coupling agent, 1-2 parts antioxidant, and 0.5-1 parts lubricant; The silane coupling agent is either KH-550 or KH-560; the antioxidant is 1010; and the lubricant is DY-ET193, produced by Shandong Dayi Chemical Co., Ltd.

[0006] In a preferred embodiment of the present invention, the modified polyester is prepared by the following steps: Step a1: Add the photoinitiator and anhydrous ethanol to a three-necked flask equipped with a stirrer and thermometer, and mix and stir at 25°C and 300 rpm for 15-20 min, then set aside. Add propanesulfonate lactone and acetone to a beaker, and mix and stir at 30°C in a water bath for 30 min. Add dimethylaminoethyl acrylate solution, react at 35°C for 3 h, filter, and obtain the antibacterial monomer. Add the antibacterial monomer and acrylamide to a beaker, and mix and stir at 400-500 rpm in a water bath at 35-40°C for 3 hours. 0 min, ultrasonic treatment for 10 min, to obtain a comonomer mixed solution; ultrasonic cleaning of polyethylene terephthalate for 15 min, vacuum drying at 50℃ for 2 h, added to the above three-necked flask, mixed and stirred at 60 r / min for 1 h, filtered, irradiated under a 365 nm ultraviolet lamp for 5 min, immersed in the above comonomer mixed solution, soaked for 10 min, taken out, irradiated under a 365 nm ultraviolet lamp for 25 min, washed 3-4 times with distilled water, dried in an oven at 50℃ for 2 h, to obtain intermediate 1; Step a2: Add anhydrous zinc acetate and sodium hydroxide solution to a three-necked flask equipped with a stirrer and thermometer, mix and stir at 25℃ and 500-800 r / min for 30 min, add cellulose nanocrystals, transfer to an oven at 80℃ and store for 24 h, wash 2-3 times with distilled water and anhydrous ethanol respectively by centrifugation, dry at 60℃ for 12-16 h, grind in a mortar for 30 min, add intermediate 1, transfer to a micro-mixing rheometer, mix at 120-150℃ and 120 r / min for 10 min to obtain intermediate 2; Step a3: Add curcumin, methylene blue, and ethanol solution to a three-necked flask equipped with a stirrer and thermometer, mix and stir in the dark for 24 hours, adjust the pH to 4-5 with a pH adjuster, add sodium dodecyl sulfonate, mix and stir for 30 minutes to obtain a photosensitizer; place intermediate 2 in the mixed aqueous solution, place it in an 80°C shaking water bath and shake for 30 minutes, wash 2-3 times with distilled water, add photosensitizer, heat to 80°C at a rate of 2°C / min, continue to heat to 130°C at a rate of 1°C / min, keep warm for 1 hour, add reducing solution, shake in a 75°C shaking water bath for 30 minutes, filter, wash the filter cake 1-2 times with distilled water, dry at 60°C for 3-4 hours to obtain modified polyester.

[0007] In a preferred embodiment of the present invention, the ratio of photoinitiator, anhydrous ethanol, propanesulfonate lactone, acetone, dimethylaminoethyl acrylate solution, acrylamide, and polyethylene terephthalate in step a1 is 0.002-0.003g: 20-30mL: 1.2-1.3g: 15mL: 15-20mL: 1.6-1.8g: 2g; the photoinitiator is benzophenone; the solvent of the dimethylaminoethyl acrylate solution is acetone, with a mass fraction of 10-20%; and the polyethylene terephthalate is of type 543-LBK.

[0008] In a preferred embodiment of the present invention, the ratio of anhydrous zinc acetate, sodium hydroxide solution, cellulose nanocrystals and intermediate 1 in step a2 is 0.4-0.5g: 10-15mL: 0.11g: 2.2-2.5g; the concentration of the sodium hydroxide solution is 0.4-0.5mol / L; and the length of the cellulose nanocrystals is 200nm and the diameter is 10nm.

[0009] In a preferred embodiment of the present invention, the ratio of curcumin, methylene blue, ethanol solution, sodium dodecylbenzenesulfonate, intermediate 2, mixed aqueous solution, and reducing solution in step a3 is 0.01-0.015g: 0.01-0.015g: 30mL: 0.02-0.025g: 2.3-2.5g: 50mL: 30mL; the pH adjuster is a 0.1mol / L hydrochloric acid solution; the ethanol solution has a mass fraction of 60-80%; the solute in the mixed aqueous solution is anhydrous sodium carbonate, sodium dodecylbenzenesulfonate, and soap powder, and the solvent is deionized water; the concentration of anhydrous sodium carbonate in the mixed aqueous solution is 2g / L, the concentration of sodium dodecylbenzenesulfonate is 2g / L, and the concentration of soap powder is 3g / L; the solute in the reducing solution is sodium dithionite and sodium hydroxide, and the solvent is deionized water; the concentration of sodium dithionite in the reducing solution is 2g / L, and the concentration of sodium hydroxide is 2g / L.

[0010] In a preferred embodiment of the present invention, the antistatic agent is prepared by the following steps: Step b1: Add aliphatic dicarboxylic acid, zinc oxide, and acetone to a three-necked flask equipped with a stirrer and thermometer. React at 30-35℃ for 30-40 min, filter, wash the filter cake 2-3 times with distilled water, dry in an oven at 105℃ for 1 h, add polyethylene glycol and catalyst, react at 150-160℃ for 4 h, cool naturally to 25℃, crush, wash with water at 60℃ for 30 min, filter, place the filter cake in a vacuum drying oven at 50℃ and dry for 3-5 h, grind in a mortar for 30 min to obtain the precursor; Step b2: Add caprolactam and sulfuric acid solution to a three-necked flask equipped with a stirrer and thermometer, mix and stir at 220-250℃ for 2-3 hours, add precursor, diphenylmethane diisocyanate, catalyst and antioxidant, react at 230-260℃ for 3-4 hours, vacuum for 30-40 minutes and then discharge to obtain antistatic agent.

[0011] In a preferred embodiment of the present invention, the ratio of the aliphatic diacid, zinc oxide, acetone, polyethylene glycol, and catalyst in step b1 is 5-6g: 1-1.5g: 30mL: 5-6g: 0.05g; the aliphatic diacid is one of sebacic acid, octanoic acid, and adipic acid; the polyethylene glycol is one of PEG-1500 and PEG-4000; and the catalyst is calcium acetate.

[0012] In a preferred embodiment of the present invention, the ratio of caprolactam, sulfuric acid solution, precursor, diphenylmethane diisocyanate, catalyst, and antioxidant in step b2 is 20-25g:0.5-1mL:5-6g:2.2-2.5g:0.02-0.03g:0.1-0.15g; the sulfuric acid solution has a mass fraction of 85%; the catalyst is dibutyltin dilaurate; and the antioxidant is one of type 1010 or 168.

[0013] In a preferred embodiment of the present invention, the modified silica is prepared by the following steps: The first portion of water glass, the first portion of sodium bicarbonate, and deionized water were added to a constant temperature reactor at 90°C and stirred at 400-500 rpm for 20-30 minutes. The second portion of water glass, the second portion of sodium bicarbonate, and a surfactant were added and stirred at 100-200 rpm for 30 minutes. The pH was adjusted to 5-6 with nitric acid solution, and manganese acetate and zinc sulfate solutions were added. The mixture was stirred and reacted for 30 minutes. The mixture was allowed to cool naturally to 25°C, filtered, and the filter cake was placed in a forced-air drying oven at 120°C and dried for 2 hours. The cake was then removed, crushed, and the modified silica was obtained.

[0014] In a preferred embodiment of the present invention, the ratio of the total amount of water glass, total amount of sodium bicarbonate, deionized water, surfactant, manganese acetate, and zinc sulfate solution is 28-32g: 15-18g: 450-500mL: 10mL: 1-1.3g: 150-200mL; the first part of water glass accounts for 1 / 3 of the total amount of water glass; the second part of water glass accounts for 2 / 3 of the total amount of water glass; the first part of sodium bicarbonate accounts for 1 / 2 of the total amount of sodium bicarbonate; the second part of sodium bicarbonate accounts for 1 / 2 of the total amount of sodium bicarbonate; the surfactant is 0.05mol / L sodium dodecylbenzenesulfonate; the concentration of the nitric acid solution is 0.1mol / L; and the mass fraction of the zinc sulfate solution is 30%.

[0015] Secondly, this application provides a method for preparing antibacterial and antistatic polyester fibers, comprising the following steps: Step 1: Weigh out 70-85 parts of modified polyester, 5-15 parts of antistatic agent, 3-8 parts of modified silica, 1-3 parts of silicon nitride, 1-4 parts of silane coupling agent, 1-2 parts of antioxidant, and 0.5-1 parts of lubricant according to the following weight proportions. Step 2: Dry the modified polyester, antistatic agent, modified silica, and silicon nitride in a vacuum oven at 80-90℃ for 6-8 hours. Add silane coupling agent, antioxidant, and lubricant, transfer to a mixer and mix for 10-15 minutes. Extrude the mixture in a twin-screw extruder at 230-250℃ and a screw speed of 150-250 r / min. After cooling in a water bath, granulate the mixture using a pelletizer to obtain functional masterbatch. Add the functional masterbatch to a screw spinning machine and spin it at 265-280℃. Stretch the yarn on a hot roller assembly, and then perform relaxation heat setting to obtain antibacterial and antistatic polyester fiber.

[0016] Thirdly, this application provides a clothing fabric, wherein the clothing fabric includes the aforementioned antibacterial and antistatic polyester fiber.

[0017] The beneficial effects of this invention are: This invention discloses an antibacterial and antistatic polyester fiber and its preparation method, as well as a clothing fabric. The process involves vacuum drying modified polyester, an antistatic agent, modified silica, and silicon nitride; adding a silane coupling agent, an antioxidant, and a lubricant; mixing the mixture in a mixer; extruding the mixture in a twin-screw extruder; cooling the mixture in a water bath; and granulating it using a pelletizer to obtain a functional masterbatch. The functional masterbatch is then added to a screw spinning machine for spinning, stretched on a hot roller assembly, and subsequently subjected to relaxation heat setting to obtain the antibacterial and antistatic polyester fiber. This fiber possesses highly efficient and long-lasting dual-effect antibacterial properties, with the leaching and killing effects of inorganic antibacterial agents zinc / manganese ions. It also combines the contact antibacterial ability of organic antibacterial monomers, and the multiple mechanisms of action can achieve a broad-spectrum and highly effective antibacterial effect, and it is not easy to induce bacterial resistance. The functional components are chemically bonded or stably loaded into the fiber, which has excellent water resistance and can achieve long-lasting antibacterial effect. By introducing zinc-containing polyether ester and hydrophilic segments, conductive or hygroscopic conductive paths are constructed in the fiber, which have long-lasting antistatic ability, wash resistance, and do not easily decay due to friction or use. The addition of modified silica and silicon nitride not only provides functionality, but also plays a role in strengthening and toughening, improving the fiber's abrasion resistance and dimensional stability.

[0018] In the preparation of antibacterial and antistatic polyester fibers, modified polyester was first prepared. Dimethylaminoethyl acrylate and propanesulfonate lactone underwent a quaternization and intracyclic ring reaction to generate antibacterial monomers with double bonds. A photoinitiator was excited under ultraviolet light irradiation, abstracting hydrogen atoms from the polyethylene terephthalate molecular chain, generating macromolecular free radicals on the surface. Immersed in a mixed solution containing the antibacterial monomer and acrylamide, a free radical copolymerization reaction occurred under secondary ultraviolet light irradiation to obtain intermediate 1. Zinc acetate reacted with sodium hydroxide to form zinc hydroxide precipitate, which was converted to zinc oxide during drying. During this process, zinc oxide adhered to cellulose nanocrystals and was hot-pressed and mixed with intermediate 1, mechanically embedded and anchored in the surface network of intermediate 1 to obtain intermediate 2. Intermediate 2 was treated with an alkaline mixed aqueous solution, which enhanced its surface negative charge. Curcumin and methylene blue reacted under acidic conditions through electrostatic interaction and hydrogen... The photosensitizer is adsorbed onto the material surface through bonding and coordination. Sodium dithionite reduces methylene blue to its colorless precursor, improving the stability and reversible redox capability of the photosensitizer system, which is beneficial for long-term function. After washing and drying, modified polyester is obtained. The antibacterial monomers copolymerized on the surface form a physical barrier through hydration, which can effectively resist bacterial adhesion. Under visible light irradiation, the loaded curcumin and methylene blue can generate reactive oxygen species, which actively and non-selectively oxidize and destroy the bacterial structure. The embedded zinc oxide can slowly release zinc ions, interfering with bacterial metabolism and providing long-term antibacterial effect. The three work synergistically to achieve a multiple antibacterial mechanism. The zwitterionic chain sulfonic acid betaine grafted on the surface has super hydrophilicity and can adsorb moisture in the air, forming a continuous water molecule conductive channel on the fiber surface, which can quickly dissipate charge. Zinc oxide is an n-type semiconductor that can help dissipate static electricity and has excellent antistatic ability.

[0019] In the preparation of antibacterial and antistatic polyester fibers, an antistatic agent was first prepared. Aliphatic diacids reacted with zinc oxide in acetone to generate zinc salts of aliphatic diacids, introducing zinc ions to provide ionic conductivity. The generated zinc salts of diacids then underwent esterification with polyethylene glycol at high temperature and with a catalyst, forming a precursor with zinc ions at its center and flexible polyether chains on both sides. Caprolactam underwent ring-opening polymerization at high temperature and with sulfuric acid to generate polycaprolactam, providing rigid chain segments. The precursor, diphenylmethane diisocyanate, a catalyst, and an antioxidant were then added. Diphenylmethane diisocyanate served as... The "molecular bridge" involves the addition polymerization of isocyanate groups at both ends of the polycaprolactam chain with the amino groups at the ends of the polycaprolactam chain and the hydroxyl groups at the ends of the precursor. Diphenylmethane diisocyanate connects the flexible zinc-containing polyether segments and the rigid polyamide segments through urea and urethane bonds, resulting in an antistatic agent. This antistatic agent has permanent, wash-resistant bulk antistatic properties, provided by the polyether soft segments embedded in the fiber and zinc ions. The polyether segments have strong hydrophilicity and can form ion migration channels, dissipating charge through a hygroscopic conductivity mechanism. Zinc ions themselves can act as charge carriers, providing ionic conductivity.

[0020] In the preparation of antibacterial and antistatic polyester fibers, modified silica was first prepared. Water glass reacted with sodium bicarbonate to generate silica sol. In the first step, a large number of tiny, uniform silica nuclei were rapidly generated using a portion of the raw materials. Then, in the presence of a surfactant, the remaining silicon source was allowed to grow slowly and uniformly on the nuclei, preventing agglomeration. Sodium dodecylbenzenesulfonate was adsorbed onto the surface of the newly formed silica particles, preventing particle agglomeration through steric hindrance, ensuring the nanoscale size and excellent dispersibility of the product. The pH of the system was adjusted to a range close to the isoelectric point of silica, where the silanol groups on the silica surface have a low degree of ionization and a neutral surface charge, which is conducive to the formation of silica particles. Positively charged metal ions approach and bind firmly through coordination. After the addition of manganese acetate and zinc sulfate solutions, manganese and zinc ions undergo coordination complexation on the silica surface, chemically immobilizing on the particle surface and within the pores to obtain modified silica. The dual ion synergy—zinc ions disrupt bacterial cell membranes, while manganese ions work synergistically to enhance the antibacterial effect, preventing detachment and achieving long-lasting sustained release—results in a broader antibacterial spectrum with highly efficient, broad-spectrum, and durable antibacterial properties. The zinc ions fixed on the silica surface are mobile charge carriers. When the filler is dispersed in the fibers, they can form auxiliary ion conduction pathways, helping to dissipate static charge and providing an antistatic auxiliary effect. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram showing the antibacterial rate test results of antibacterial and antistatic polyester fibers in Examples 1-3 and Comparative Examples 1-3 of this invention.

[0023] Figure 2 This is a schematic diagram showing the electrostatic half-life test results of the antibacterial and antistatic polyester fibers of Examples 1-3 and Comparative Examples 1-3 in this invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: This embodiment describes a method for preparing antibacterial and antistatic polyester fiber, comprising the following steps: Step S1: Add 0.002g benzophenone and 20mL anhydrous ethanol to a three-necked flask equipped with a stirrer and thermometer, and mix and stir at 25℃ and 300r / min for 15min, set aside; add 1.2g propanesulfonate lactone and 15mL acetone to a beaker, mix and stir at 30℃ for 30min, add 15mL dimethylaminoethyl acrylate solution, react at 35℃ for 3h, filter to obtain the antibacterial monomer; add the antibacterial monomer and 1.6g acrylamide to a beaker, mix and stir at 400r / min in a 35℃ water bath for 30min, and sonicate for 1 minute. 0 min yielded a comonomer mixed solution; 2 g of polyethylene terephthalate 543-LBK was ultrasonically cleaned for 15 min, vacuum dried at 50℃ for 2 h, added to the above three-necked flask, mixed and stirred at 60 r / min for 1 h, filtered, irradiated under a 365 nm UV lamp for 5 min, immersed in the above comonomer mixed solution, soaked for 10 min, removed, irradiated under a 365 nm UV lamp for 25 min, washed 3 times with distilled water, and dried in an oven at 50℃ for 2 h to obtain intermediate 1; the solvent of the dimethylaminoethyl acrylate solution was acetone, with a mass fraction of 10%; Step S2: Add 0.4g of anhydrous zinc acetate and 10mL of 0.4mol / L sodium hydroxide solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 25℃ and 500r / min for 30min. Add 0.11g of cellulose nanocrystals with a length of 200nm and a diameter of 10nm. Transfer to an oven at 80℃ and store for 24h. Wash twice with distilled water and anhydrous ethanol by centrifugation. Dry at 60℃ for 12h. Grind in a mortar for 30min. Add 2.2g of intermediate 1. Transfer to a micro-mixing rheometer and mix at 120℃ and 120r / min for 10min to obtain intermediate 2. Step S3: Add 0.01g curcumin, 0.01g methylene blue, and 30mL of 60% ethanol solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir in the dark for 24h. Adjust the pH to 4 with 0.1mol / L hydrochloric acid solution, add 0.02g sodium dodecyl sulfonate, and mix and stir for 30min to obtain the photosensitizer. Place 2.3g of intermediate 2 in 50mL of the mixed aqueous solution, place it in an 80℃ shaking water bath and shake for 30min. Wash twice with distilled water, add the photosensitizer, and stir at a rate of 2℃ / min. The temperature was raised to 80℃, and then further increased to 130℃ at a rate of 1℃ / min. The temperature was maintained for 1 hour. 30 mL of reducing solution was added, and the mixture was shaken in a 75℃ shaking water bath for 30 minutes. The mixture was filtered, and the filter cake was washed once with distilled water. It was then dried at 60℃ for 3 hours to obtain the modified polyester. The solutes and their concentrations in the mixed aqueous solution were 2 g / L anhydrous sodium carbonate, 2 g / L sodium dodecylbenzenesulfonate, and 3 g / L soap powder, with deionized water as the solvent. The solutes and their concentrations in the reducing solution were 2 g / L sodium dithionite and 2 g / L sodium hydroxide, with deionized water as the solvent. Step S4: Add 5g adipic acid, 1g zinc oxide and 30mL acetone to a three-necked flask equipped with a stirrer and thermometer, react at 30℃ for 30min, filter, wash the filter cake twice with distilled water, dry in an oven at 105℃ for 1h, add 5g polyethylene glycol PEG-4000 and 0.05g calcium acetate, react at 150℃ for 4h, cool naturally to 25℃, crush, wash with water at 60℃ for 30min, filter, place the filter cake in a vacuum drying oven at 50℃ for 3h, grind in a mortar for 30min to obtain the precursor; Step S5: Add 20g caprolactam and 0.5mL of 85% sulfuric acid solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 220℃ for 2h. Add 5g precursor, 2.2g diphenylmethane diisocyanate, 0.02g dibutyltin dilaurate and 0.1g antioxidant 1010. React at 230℃ for 3h. After vacuuming for 30min, discharge the material to obtain the antistatic agent. Step S6: Add 9g of water glass, 7.5g of sodium bicarbonate and 450mL of deionized water to a constant temperature reactor at 90℃, and mix and stir at 400r / min for 20min. Add 19g of water glass, 7.5g of sodium bicarbonate and 10mL of 0.05mol / L sodium dodecylbenzenesulfonate, and mix and stir at 100r / min for 30min. Adjust the pH to 5 with 0.1mol / L nitric acid solution, add 1g of manganese acetate and 150mL of 30% zinc sulfate solution, mix and stir for 30min, cool naturally to 25℃, filter, place the filter cake in a 120℃ forced-air drying oven and dry for 2h, take it out and crush it to obtain modified silica. Step S7: Weigh out 70 parts of modified polyester, 5 parts of antistatic agent, 3 parts of modified silica, 1 part of silicon nitride, 1 part of silane coupling agent KH-550, 1 part of antioxidant 1010 and 0.5 parts of lubricant DY-ET193 according to the following weight. Step S8: The modified polyester, antistatic agent, modified silica, and silicon nitride are dried in a vacuum oven at 80°C for 6 hours. Silane coupling agent KH-550, antioxidant 1010, and lubricant DY-ET193 are added. The mixture is then transferred to a mixer and mixed for 10 minutes. The mixture is then extruded in a twin-screw extruder at 230°C and a screw speed of 150 r / min. After cooling in a water bath, the mixture is granulated using a pelletizer to obtain functional masterbatch. The functional masterbatch is then added to a screw spinning machine and spun at 265°C. The fibers are stretched on a hot roller assembly and then relaxed and heat-set to obtain antibacterial and antistatic polyester fibers.

[0026] Example 2: This embodiment describes a method for preparing antibacterial and antistatic polyester fiber, comprising the following steps: Step S1: Add 0.0025g benzophenone and 25mL anhydrous ethanol to a three-necked flask equipped with a stirrer and thermometer, and mix and stir at 25℃ and 300r / min for 18min, set aside; add 1.25g propanesulfonate lactone and 15mL acetone to a beaker, mix and stir at 30℃ for 30min, add 18mL dimethylaminoethyl acrylate solution, react at 35℃ for 3h, filter to obtain the antibacterial monomer; add the antibacterial monomer and 1.7g acrylamide to a beaker, mix and stir at 450r / min in a 38℃ water bath for 30min, and sonicate. After 10 min, a comonomer mixed solution was obtained; 2 g of polyethylene terephthalate 543-LBK was ultrasonically cleaned for 15 min, vacuum dried at 50℃ for 2 h, added to the above three-necked flask, mixed and stirred at 60 r / min for 1 h, filtered, irradiated under a 365 nm UV lamp for 5 min, immersed in the above comonomer mixed solution, soaked for 10 min, removed, irradiated under a 365 nm UV lamp for 25 min, washed 4 times with distilled water, and dried in an oven at 50℃ for 2 h to obtain intermediate 1; the solvent of the dimethylaminoethyl acrylate solution was acetone, with a mass fraction of 15%; Step S2: Add 0.45g of anhydrous zinc acetate and 13mL of 0.45mol / L sodium hydroxide solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 25℃ and 650r / min for 30min. Add 0.11g of cellulose nanocrystals with a length of 200nm and a diameter of 10nm. Transfer to an oven at 80℃ and store for 24h. Wash three times with distilled water and anhydrous ethanol by centrifugation. Dry at 60℃ for 14h. Grind in a mortar for 30min. Add 2.35g of intermediate 1. Transfer to a micro-mixing rheometer and mix at 135℃ and 120r / min for 10min to obtain intermediate 2. Step S3: Add 0.013g curcumin, 0.013g methylene blue, and 30mL of 70% ethanol solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir in the dark for 24h. Adjust the pH to 4.5 with 0.1mol / L hydrochloric acid solution. Add 0.023g sodium dodecyl sulfonate and mix and stir for 30min to obtain the photosensitizer. Place 2.4g of intermediate 2 in 50mL of the mixed aqueous solution and place it in an 80℃ shaking water bath for 30min. Wash three times with distilled water, add the photosensitizer, and stir at a rate of 2℃ / min. The temperature was increased to 80℃, and then further increased to 130℃ at a rate of 1℃ / min. The temperature was maintained for 1 hour, and 30 mL of reducing solution was added. The mixture was shaken in a 75℃ shaking water bath for 30 minutes, filtered, and the filter cake was washed twice with distilled water. It was then dried at 60℃ for 3.5 hours to obtain the modified polyester. The solutes and their concentrations in the mixed aqueous solution were 2 g / L anhydrous sodium carbonate, 2 g / L sodium dodecylbenzenesulfonate, and 3 g / L soap powder, with deionized water as the solvent. The solutes and their concentrations in the reducing solution were 2 g / L sodium dithionite and 2 g / L sodium hydroxide, with deionized water as the solvent. Step S4: Add 5.5g adipic acid, 1.3g zinc oxide and 30mL acetone to a three-necked flask equipped with a stirrer and thermometer. React at 33℃ for 35min. Filter by suction, wash the filter cake three times with distilled water, and dry in an oven at 105℃ for 1h. Add 5.5g polyethylene glycol PEG-4000 and 0.05g calcium acetate. React at 155℃ for 4h. Cool naturally to 25℃, crush, wash with water at 60℃ for 30min, filter by suction, place the filter cake in a vacuum drying oven at 50℃ and dry for 4h. Grind in a mortar for 30min to obtain the precursor. Step S5: Add 23g caprolactam and 0.8mL of 85% sulfuric acid solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 235℃ for 2.5h. Add 5.5g precursor, 2.35g diphenylmethane diisocyanate, 0.025g dibutyltin dilaurate and 0.13g antioxidant 1010. React at 245℃ for 3.5h. After vacuuming for 35min, discharge the material to obtain the antistatic agent. Step S6: Add 9.5g water glass, 8g sodium bicarbonate and 480mL deionized water to a constant temperature reactor at 90℃, and mix and stir at 450r / min for 25min. Add 19g water glass, 8g sodium bicarbonate and 10mL 0.05mol / L sodium dodecylbenzenesulfonate, and mix and stir at 150r / min for 30min. Adjust the pH to 6 with 0.1mol / L nitric acid solution, add 1.2g manganese acetate and 180mL 30% zinc sulfate solution, mix and stir for 30min, cool naturally to 25℃, filter, place the filter cake in a 120℃ forced-air drying oven and dry for 2h, take it out and crush it to obtain modified silica. Step S7: Weigh out 78 parts of modified polyester, 10 parts of antistatic agent, 5 parts of modified silica, 2 parts of silicon nitride, 3 parts of silane coupling agent KH-550, 2 parts of antioxidant 1010 and 1 part of lubricant DY-ET193 according to the following weight. Step S8: The modified polyester, antistatic agent, modified silica, and silicon nitride are dried in a vacuum oven at 85°C for 7 hours. Silane coupling agent KH-550, antioxidant 1010, and lubricant DY-ET193 are added, and the mixture is transferred to a mixer and mixed for 13 minutes. The mixture is then extruded in a twin-screw extruder at 240°C and a screw speed of 200 r / min. After cooling in a water bath, the mixture is granulated using a pelletizer to obtain functional masterbatch. The functional masterbatch is then added to a screw spinning machine and spun at 270°C. The fibers are stretched on a hot roller assembly and then relaxed and heat-set to obtain antibacterial and antistatic polyester fibers.

[0027] Example 3: This embodiment describes a method for preparing antibacterial and antistatic polyester fiber, comprising the following steps: Step S1: Add 0.003g benzophenone and 30mL anhydrous ethanol to a three-necked flask equipped with a stirrer and thermometer, and mix and stir at 25℃ and 300r / min for 20min, set aside; add 1.3g propanesulfonate lactone and 15mL acetone to a beaker, mix and stir at 30℃ for 30min, add 20mL dimethylaminoethyl acrylate solution, react at 35℃ for 3h, filter to obtain the antibacterial monomer; add the antibacterial monomer and 1.8g acrylamide to a beaker, mix and stir at 500r / min for 30min in a 40℃ water bath, and sonicate for 1 minute. 0 min yielded a comonomer mixed solution; 2 g of polyethylene terephthalate 543-LBK was ultrasonically cleaned for 15 min, vacuum dried at 50℃ for 2 h, added to the above three-necked flask, mixed and stirred at 60 r / min for 1 h, filtered, irradiated under a 365 nm UV lamp for 5 min, immersed in the above comonomer mixed solution, soaked for 10 min, removed, irradiated under a 365 nm UV lamp for 25 min, washed 4 times with distilled water, and dried in an oven at 50℃ for 2 h to obtain intermediate 1; the solvent of the dimethylaminoethyl acrylate solution was acetone, with a mass fraction of 20%; Step S2: Add 0.5g of anhydrous zinc acetate and 15mL of 0.5mol / L sodium hydroxide solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 25℃ and 800r / min for 30min. Add 0.11g of cellulose nanocrystals with a length of 200nm and a diameter of 10nm. Transfer to an oven at 80℃ and store for 24h. Wash three times with distilled water and anhydrous ethanol by centrifugation. Dry at 60℃ for 16h. Grind in a mortar for 30min. Add 2.5g of intermediate 1. Transfer to a micro-mixing rheometer and mix at 150℃ and 120r / min for 10min to obtain intermediate 2. Step S3: Add 0.015g curcumin, 0.015g methylene blue, and 30mL of 80% ethanol solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir in the dark for 24h. Adjust the pH to 5 with 0.1mol / L hydrochloric acid solution. Add 0.025g sodium dodecyl sulfonate and mix and stir for 30min to obtain the photosensitizer. Place 2.5g of intermediate 2 in 50mL of the mixed aqueous solution and place it in an 80℃ shaking water bath for 30min. Wash three times with distilled water, add the photosensitizer, and stir at a rate of 2℃ / min. The temperature was increased to 80℃, and then further increased to 130℃ at a rate of 1℃ / min. The temperature was maintained for 1 hour, and 30 mL of reducing solution was added. The mixture was shaken in a 75℃ shaking water bath for 30 minutes, filtered, and the filter cake was washed twice with distilled water. The mixture was then dried at 60℃ for 4 hours to obtain the modified polyester. The solutes and their concentrations in the mixed aqueous solution were 2 g / L anhydrous sodium carbonate, 2 g / L sodium dodecylbenzenesulfonate, and 3 g / L soap powder, with deionized water as the solvent. The solutes and their concentrations in the reducing solution were 2 g / L sodium dithionite and 2 g / L sodium hydroxide, with deionized water as the solvent. Step S4: Add 6g adipic acid, 1.5g zinc oxide and 30mL acetone to a three-necked flask equipped with a stirrer and thermometer, react at 35℃ for 40min, filter, wash the filter cake 3 times with distilled water, dry in an oven at 105℃ for 1h, add 6g polyethylene glycol PEG-4000 and 0.05g calcium acetate, react at 160℃ for 4h, cool naturally to 25℃, crush, wash with water at 60℃ for 30min, filter, place the filter cake in a vacuum drying oven at 50℃ for 5h, grind in a mortar for 30min to obtain the precursor; Step S5: Add 25g caprolactam and 1mL of 85% sulfuric acid solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 250℃ for 3h. Add 6g precursor, 2.5g diphenylmethane diisocyanate, 0.03g dibutyltin dilaurate and 0.15g antioxidant 1010. React at 260℃ for 4h. After vacuuming for 40min, discharge the material to obtain the antistatic agent. Step S6: Add 10g of water glass, 9g of sodium bicarbonate and 500mL of deionized water to a constant temperature reactor at 90℃, and mix and stir at 500r / min for 30min. Add 22g of water glass, 9g of sodium bicarbonate and 10mL of 0.05mol / L sodium dodecylbenzenesulfonate, and mix and stir at 200r / min for 30min. Adjust the pH to 6 with 0.1mol / L nitric acid solution, add 1.3g of manganese acetate and 200mL of 30% zinc sulfate solution, mix and stir for 30min, cool naturally to 25℃, filter, place the filter cake in a 120℃ forced-air drying oven and dry for 2h, take it out and crush it to obtain modified silica. Step S7: Weigh out 85 parts of modified polyester, 15 parts of antistatic agent, 8 parts of modified silica, 3 parts of silicon nitride, 4 parts of silane coupling agent KH-550, 2 parts of antioxidant 1010 and 1 part of lubricant DY-ET193 according to the following weight. Step S8: The modified polyester, antistatic agent, modified silica, and silicon nitride are dried in a vacuum oven at 90°C for 8 hours. Silane coupling agent KH-550, antioxidant 1010, and lubricant DY-ET193 are added, and the mixture is transferred to a mixer and mixed for 15 minutes. The mixture is then extruded in a twin-screw extruder at 250°C and a screw speed of 250 r / min. After cooling in a water bath, the mixture is granulated using a pelletizer to obtain functional masterbatch. The functional masterbatch is then added to a screw spinning machine and spun at 280°C. The fibers are stretched on a hot roller assembly and then relaxed and heat-set to obtain antibacterial and antistatic polyester fibers.

[0028] Comparative Example 1: This comparative example illustrates a method for preparing antibacterial and antistatic polyester fiber, comprising the following steps: Step S1: Add 0.0025g benzophenone and 25mL anhydrous ethanol to a three-necked flask equipped with a stirrer and thermometer, and mix and stir at 25℃ and 300r / min for 18min, set aside; add 1.25g propanesulfonate lactone and 15mL acetone to a beaker, mix and stir at 30℃ for 30min, add 18mL dimethylaminoethyl acrylate solution, react at 35℃ for 3h, filter to obtain the antibacterial monomer; add the antibacterial monomer and 1.7g acrylamide to a beaker, mix and stir at 450r / min in a 38℃ water bath for 30min, and sonicate. After 10 min, a comonomer mixed solution was obtained; 2 g of polyethylene terephthalate 543-LBK was ultrasonically cleaned for 15 min, vacuum dried at 50℃ for 2 h, added to the above three-necked flask, mixed and stirred at 60 r / min for 1 h, filtered, irradiated under a 365 nm UV lamp for 5 min, immersed in the above comonomer mixed solution, soaked for 10 min, removed, irradiated under a 365 nm UV lamp for 25 min, washed 4 times with distilled water, and dried in an oven at 50℃ for 2 h to obtain intermediate 1; the solvent of the dimethylaminoethyl acrylate solution was acetone, with a mass fraction of 15%; Step S2: Add 0.45g of anhydrous zinc acetate and 13mL of 0.45mol / L sodium hydroxide solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 25℃ and 650r / min for 30min. Add 0.11g of cellulose nanocrystals with a length of 200nm and a diameter of 10nm. Transfer to an oven at 80℃ and store for 24h. Wash three times with distilled water and anhydrous ethanol by centrifugation. Dry at 60℃ for 14h. Grind in a mortar for 30min. Add 2.35g of intermediate 1. Transfer to a micro-mixing rheometer and mix at 135℃ and 120r / min for 10min to obtain intermediate 2. Step S3: Add 0.013g curcumin, 0.013g methylene blue, and 30mL of 70% ethanol solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir in the dark for 24h. Adjust the pH to 4.5 with 0.1mol / L hydrochloric acid solution. Add 0.023g sodium dodecyl sulfonate and mix and stir for 30min to obtain the photosensitizer. Place 2.4g of intermediate 2 in 50mL of the mixed aqueous solution and place it in an 80℃ shaking water bath for 30min. Wash three times with distilled water, add the photosensitizer, and stir at a rate of 2℃ / min. The temperature was increased to 80℃, and then further increased to 130℃ at a rate of 1℃ / min. The temperature was maintained for 1 hour, and 30 mL of reducing solution was added. The mixture was shaken in a 75℃ shaking water bath for 30 minutes, filtered, and the filter cake was washed twice with distilled water. It was then dried at 60℃ for 3.5 hours to obtain the modified polyester. The solutes and their concentrations in the mixed aqueous solution were 2 g / L anhydrous sodium carbonate, 2 g / L sodium dodecylbenzenesulfonate, and 3 g / L soap powder, with deionized water as the solvent. The solutes and their concentrations in the reducing solution were 2 g / L sodium dithionite and 2 g / L sodium hydroxide, with deionized water as the solvent. Step S4: Weigh out 78 parts of modified polyester, 5 parts of silica, 2 parts of silicon nitride, 3 parts of silane coupling agent KH-550, 2 parts of antioxidant 1010 and 1 part of lubricant DY-ET193 according to the following weight. Step S5: The modified polyester, silica, and silicon nitride are dried in a vacuum oven at 85°C for 7 hours. Silane coupling agent KH-550, antioxidant 1010, and lubricant DY-ET193 are added. The mixture is then transferred to a mixer and mixed for 13 minutes. The mixture is then extruded in a twin-screw extruder at 240°C and a screw speed of 200 r / min. After cooling in a water bath, the mixture is granulated using a pelletizer to obtain functional masterbatch. The functional masterbatch is then added to a screw spinning machine and spun at 270°C. The fibers are stretched on a hot roller assembly and then relaxed and heat-set to obtain antibacterial and antistatic polyester fibers.

[0029] Comparative Example 2: This comparative example illustrates a method for preparing antibacterial and antistatic polyester fiber, comprising the following steps: Step S1: Add 0.0025g benzophenone and 25mL anhydrous ethanol to a three-necked flask equipped with a stirrer and thermometer, and mix and stir at 25℃ and 300r / min for 18min, set aside; add 1.25g propanesulfonate lactone and 15mL acetone to a beaker, mix and stir at 30℃ for 30min, add 18mL dimethylaminoethyl acrylate solution, react at 35℃ for 3h, filter to obtain the antibacterial monomer; add the antibacterial monomer and 1.7g acrylamide to a beaker, mix and stir at 450r / min in a 38℃ water bath for 30min, and sonicate. After 10 min, a comonomer mixed solution was obtained; 2 g of polyethylene terephthalate 543-LBK was ultrasonically cleaned for 15 min, vacuum dried at 50℃ for 2 h, added to the above three-necked flask, mixed and stirred at 60 r / min for 1 h, filtered, irradiated under a 365 nm UV lamp for 5 min, immersed in the above comonomer mixed solution, soaked for 10 min, removed, irradiated under a 365 nm UV lamp for 25 min, washed 4 times with distilled water, and dried in an oven at 50℃ for 2 h to obtain intermediate 1; the solvent of the dimethylaminoethyl acrylate solution was acetone, with a mass fraction of 15%; Step S2: Add 0.45g of anhydrous zinc acetate and 13mL of 0.45mol / L sodium hydroxide solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 25℃ and 650r / min for 30min. Add 0.11g of cellulose nanocrystals with a length of 200nm and a diameter of 10nm. Transfer to an oven at 80℃ and store for 24h. Wash three times with distilled water and anhydrous ethanol by centrifugation. Dry at 60℃ for 14h. Grind in a mortar for 30min. Add 2.35g of intermediate 1. Transfer to a micro-mixing rheometer and mix at 135℃ and 120r / min for 10min to obtain intermediate 2. Step S3: Add 0.013g curcumin, 0.013g methylene blue, and 30mL of 70% ethanol solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir in the dark for 24h. Adjust the pH to 4.5 with 0.1mol / L hydrochloric acid solution. Add 0.023g sodium dodecyl sulfonate and mix and stir for 30min to obtain the photosensitizer. Place 2.4g of intermediate 2 in 50mL of the mixed aqueous solution and place it in an 80℃ shaking water bath for 30min. Wash three times with distilled water, add the photosensitizer, and stir at a rate of 2℃ / min. The temperature was increased to 80℃, and then further increased to 130℃ at a rate of 1℃ / min. The temperature was maintained for 1 hour, and 30 mL of reducing solution was added. The mixture was shaken in a 75℃ shaking water bath for 30 minutes, filtered, and the filter cake was washed twice with distilled water. It was then dried at 60℃ for 3.5 hours to obtain the modified polyester. The solutes and their concentrations in the mixed aqueous solution were 2 g / L anhydrous sodium carbonate, 2 g / L sodium dodecylbenzenesulfonate, and 3 g / L soap powder, with deionized water as the solvent. The solutes and their concentrations in the reducing solution were 2 g / L sodium dithionite and 2 g / L sodium hydroxide, with deionized water as the solvent. Step S4: Add 5.5g adipic acid, 1.3g zinc oxide and 30mL acetone to a three-necked flask equipped with a stirrer and thermometer. React at 33℃ for 35min. Filter by suction, wash the filter cake three times with distilled water, and dry in an oven at 105℃ for 1h. Add 5.5g polyethylene glycol PEG-4000 and 0.05g calcium acetate. React at 155℃ for 4h. Cool naturally to 25℃, crush, wash with water at 60℃ for 30min, filter by suction, place the filter cake in a vacuum drying oven at 50℃ and dry for 4h. Grind in a mortar for 30min to obtain the precursor. Step S5: Add 23g caprolactam and 0.8mL of 85% sulfuric acid solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 235℃ for 2.5h. Add 5.5g precursor, 2.35g diphenylmethane diisocyanate, 0.025g dibutyltin dilaurate and 0.13g antioxidant 1010. React at 245℃ for 3.5h. After vacuuming for 35min, discharge the material to obtain the antistatic agent. Step S6: Weigh out 78 parts of modified polyester, 10 parts of antistatic agent, 5 parts of silica, 2 parts of silicon nitride, 3 parts of silane coupling agent KH-550, 2 parts of antioxidant 1010 and 1 part of lubricant DY-ET193 according to the following weight parts. Step S7: The modified polyester, antistatic agent, silica, and silicon nitride are dried in a vacuum oven at 85°C for 7 hours. Silane coupling agent KH-550, antioxidant 1010, and lubricant DY-ET193 are added. The mixture is then transferred to a mixer and mixed for 13 minutes. The mixture is then extruded in a twin-screw extruder at 240°C and a screw speed of 200 r / min. After cooling in a water bath, the mixture is granulated using a pelletizer to obtain functional masterbatch. The functional masterbatch is then added to a screw spinning machine and spun at 270°C. The fibers are stretched on a hot roller assembly and then relaxed and heat-set to obtain antibacterial and antistatic polyester fibers.

[0030] Comparative Example 3: This comparative example illustrates a method for preparing antibacterial and antistatic polyester fiber, comprising the following steps: Step S1: Add 5.5g adipic acid, 1.3g zinc oxide and 30mL acetone to a three-necked flask equipped with a stirrer and thermometer. React at 33℃ for 35min. Filter and wash the filter cake three times with distilled water. Dry in an oven at 105℃ for 1h. Add 5.5g polyethylene glycol PEG-4000 and 0.05g calcium acetate. React at 155℃ for 4h. Cool naturally to 25℃, crush, wash with water at 60℃ for 30min, filter, and place the filter cake in a vacuum drying oven at 50℃ for 4h. Grind in a mortar for 30min to obtain the precursor. Step S2: Add 23g caprolactam and 0.8mL of 85% sulfuric acid solution to a three-necked flask equipped with a stirrer and thermometer. Mix and stir at 235℃ for 2.5h. Add 5.5g precursor, 2.35g diphenylmethane diisocyanate, 0.025g dibutyltin dilaurate and 0.13g antioxidant 1010. React at 245℃ for 3.5h. After vacuuming for 35min, discharge the material to obtain the antistatic agent. Step S3: Add 9.5g of water glass, 8g of sodium bicarbonate and 480mL of deionized water to a constant temperature reactor at 90℃, and mix and stir at 450r / min for 25min. Add 19g of water glass, 8g of sodium bicarbonate and 10mL of 0.05mol / L sodium dodecylbenzenesulfonate, and mix and stir at 150r / min for 30min. Adjust the pH to 6 with 0.1mol / L nitric acid solution, add 1.2g of manganese acetate and 180mL of 30% zinc sulfate solution, mix and stir for 30min, cool naturally to 25℃, filter, place the filter cake in a 120℃ forced-air drying oven and dry for 2h, take it out and crush it to obtain modified silica. Step S4: Weigh out 78 parts by weight of polyethylene terephthalate 543-LBK, 10 parts of antistatic agent, 5 parts of modified silica, 2 parts of silicon nitride, 3 parts of silane coupling agent KH-550, 2 parts of antioxidant 1010 and 1 part of lubricant DY-ET193. Step S5: Polyethylene terephthalate 543-LBK, antistatic agent, modified silica, and silicon nitride are dried in a vacuum oven at 85°C for 7 hours. Silane coupling agent KH-550, antioxidant 1010, and lubricant DY-ET193 are added, and the mixture is transferred to a mixer and mixed for 13 minutes. The mixture is then extruded in a twin-screw extruder at 240°C and a screw speed of 200 r / min. After cooling in a water bath, the mixture is granulated using a pelletizer to obtain functional masterbatch. The functional masterbatch is then added to a screw spinning machine and spun at 270°C. The fibers are stretched on a hot roller assembly and then relaxed and heat-set to obtain antibacterial and antistatic polyester fibers.

[0031] The antibacterial and antistatic polyester fibers prepared in Examples 1-3 and Comparative Examples 1-3 were tested for antibacterial rate according to standard GB / T20944.2-2007; the electrostatic half-life was tested according to standard GB / T 12703.2-2021. The test results are as follows: Figure 1-2 As shown: Comparing Examples 1-3 with Comparative Examples 1-3: In Example 1, the amount of each component is relatively small, resulting in a limited total amount of antibacterial ions and relatively weak antibacterial ability. The small amount of antistatic agent can only form a preliminary, discontinuous conductive network in the matrix, and the charge dissipation rate is slow. In Example 2, the amount of each component is increased, the concentration of antibacterial ions is significantly increased, and a strong synergy is generated with the surface photodynamic layer to achieve efficient sterilization. The amount of antistatic agent is sufficient to build a continuous and complete ionic conductive network inside the fiber. At the same time, the zinc ions in the modified silica provide auxiliary conductivity, and the antistatic performance reaches the optimal level. In Example 3, the amount of each component is relatively large, which affects the continuity of the polymer matrix, but the performance is good. Comparing Example 2 with Comparative Example 1, it can be seen that Comparative Example 1 lacks both antistatic agent and modified silica, and cannot form a continuous ionic conductive network inside the fiber. Effective charge dissipation pathways are needed; ordinary silica and a small amount of surface hydrophilic groups alone cannot achieve effective antistatic effects. Using ordinary silica results in the loss of the antibacterial contribution of zinc / manganese ions, causing the overall antibacterial performance to rely solely on modified polyester, leading to a decrease in antibacterial properties. Comparing Example 2 with Comparative Example 2, it is clear that Comparative Example 2 replaced the zinc / manganese ion-loaded modified silica with ordinary silica. Ordinary silica mainly serves a reinforcing role and has almost no antibacterial activity, losing the dual antibacterial contribution of zinc / manganese ions. Its antibacterial properties rely solely on the modified polyester, thus reducing the antibacterial rate. Comparing Example 2 with Comparative Example 3, it is clear that Comparative Example 3 uses unmodified polyester, lacking a zwitterionic antibacterial layer and photodynamic photosensitizer grafted onto the surface, and unable to effectively load zinc oxide / cellulose crystals internally, resulting in a lower antibacterial rate. The lack of a hydrophilic layer on the surface of ordinary polyester leads to weak interfacial bonding with antistatic agents and functional fillers, resulting in uneven dispersion. Charge cannot quickly leak through the surface hydration layer, and the internal conductive network is also incomplete, thus reducing antistatic performance.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in this application, they should all fall within the protection scope of the present invention.

Claims

1. An antibacterial antistatic polyester fiber, characterized by, The following components are included by weight parts: Modified polyester 70-85 parts, antistatic agent 5-15 parts, modified white carbon black 3-8 parts, silicon nitride 1-3 parts, silane coupling agent 1-4 parts, antioxidant 1-2 parts and lubricant 0.5-1 parts; The modified polyester is prepared by the following steps: Step a1: the photoinitiator, anhydrous ethanol is added to a three-necked flask and stirred; propenesulfonic acid lactone, acetone is mixed and stirred, and dimethylaminoethyl acrylate solution is added for reaction, and then filtered to obtain bacteriostatic monomer; the bacteriostatic monomer and acrylamide are mixed and stirred, and then ultrasonic treatment is performed to obtain a copolymer monomer mixed solution; polyethylene terephthalate is ultrasonically cleaned, dried, added to the above three-necked flask and stirred, filtered, irradiated by a UV lamp, immersed in the above copolymer monomer mixed solution, taken out, irradiated by a UV lamp, washed and dried to obtain intermediate 1; Step a2: the anhydrous zinc acetate and sodium hydroxide solution are stirred, and then cellulose nanocrystals are added and stored, centrifuged and washed, dried, ground, and then intermediate 1 is added and mixed to obtain intermediate 2; Step a3: curcumin, methylene blue and ethanol solution are stirred, and then pH is adjusted by a pH adjuster, and then sodium dodecyl sulfate is added and stirred to obtain a photosensitizer; intermediate 2 is placed in a mixed aqueous solution and shaken, washed, and then the photosensitizer is added, heated, a reducing solution is added, shaken, filtered, the filter cake is washed and dried to obtain the modified polyester.

2. The anti-bacterial and anti-static polyester fiber according to claim 1, wherein, The silane coupling agent is one of KH-550 and KH-560; the antioxidant is 1010; and the lubricant is DY-ET193.

3. The anti-bacterial and anti-static polyester fiber according to claim 1, wherein the anti-bacterial and anti-static polyester fiber is characterized by, The amount ratio of the photoinitiator, anhydrous ethanol, propenesulfonic acid lactone, acetone, dimethylaminoethyl acrylate solution, acrylamide and polyethylene terephthalate in step a1 is 0.002-0.003g: 20-30mL: 1.2-1.3g: 15mL: 15-20mL: 1.6-1.8g: 2g; the photoinitiator is benzophenone; the solvent of the dimethylaminoethyl acrylate solution is acetone with a mass fraction of 10-20%; the polyethylene terephthalate is 543-LBK; the amount ratio of the anhydrous zinc acetate, sodium hydroxide solution, cellulose nanocrystals and intermediate 1 in step a2 is 0.4-0.5g: 10-15mL: 0.11g: 2.2-2.5g; the concentration of the sodium hydroxide solution is 0.4-0.5mol / L; and the cellulose nanocrystals have a length of 200nm and a diameter of 10nm.

4. The anti-bacterial and anti-static polyester fiber according to claim 1, wherein the anti-bacterial and anti-static polyester fiber is characterized by, The amount ratio of the curcumin, methylene blue, ethanol solution, sodium dodecyl sulfonate, intermediate 2, mixed aqueous solution and reducing solution in step a3 is 0.01-0.015g:0.01-0.015g:30mL:0.02-0.025g:2.3-2.5g:50mL:30mL; the pH regulator is 0.1mol / L hydrochloric acid solution; the mass fraction of the ethanol solution is 60-80%; the solute in the mixed aqueous solution is anhydrous sodium carbonate, sodium dodecyl benzene sulfonate and soap powder, and the solvent is deionized water; the concentration of anhydrous sodium carbonate in the mixed aqueous solution is 2g / L, the concentration of sodium dodecyl benzene sulfonate is 2g / L, and the concentration of soap powder is 3g / L; the solute in the reducing solution is sodium dithionite and sodium hydroxide, and the solvent is deionized water; the concentration of sodium dithionite in the reducing solution is 2g / L, and the concentration of sodium hydroxide is 2g / L.

5. The anti-bacterial and anti-static polyester fiber according to claim 1, wherein the anti-bacterial and anti-static polyester fiber is characterized by comprising 0.1 to 0.5 wt% of the silver compound. The antistatic agent is prepared by the following steps: Step b1: mixing aliphatic dibasic acid, zinc oxide and acetone for reaction, suction filtration, washing the filter cake, drying, adding polyethylene glycol and catalyst for reaction, cooling, crushing, water washing, suction filtration, drying and grinding the filter cake to obtain a precursor; Step b2: mixing caprolactam and sulfuric acid solution for reaction, adding the precursor, diphenyl methane diisocyanate, catalyst and antioxidant, reaction, discharging after vacuumizing to obtain the antistatic agent.

6. The anti-bacterial and anti-static polyester fiber according to claim 5, wherein the anti-bacterial and anti-static polyester fiber is characterized by, The amount ratio of the aliphatic dibasic acid, zinc oxide, acetone, polyethylene glycol and catalyst in step b1 is 5-6g:1-1.5g:30mL:5-6g:0.05g; the aliphatic dibasic acid is one of decanedioic acid, octanedioic acid and adipic acid; the type of the polyethylene glycol is one of PEG-1500 and PEG-4000; the catalyst in step b1 is calcium acetate; the amount ratio of the caprolactam, sulfuric acid solution, precursor, diphenyl methane diisocyanate, catalyst and antioxidant in step b2 is 20-25g:0.5-1mL:5-6g:2.2-2.5g:0.02-0.03g:0.1-0.15g; the mass fraction of the sulfuric acid solution is 85%; the catalyst in step b2 is dibutyltin dilaurate; the type of the antioxidant is one of 1010 and 168.

7. The anti-bacterial and anti-static polyester fiber according to claim 1, wherein the anti-bacterial and anti-static polyester fiber is characterized by comprising 0.1 to 0.5 wt% of the silver compound. The modified white carbon black is prepared by the following steps: Mixing the first water glass, the first sodium bicarbonate and deionized water for stirring, adding the second water glass, the second sodium bicarbonate and a surfactant, mixing and stirring, adjusting pH with nitric acid solution, adding manganese acetate and zinc sulfate solution, mixing and stirring for reaction, cooling, filtering, drying the filter cake, crushing to obtain the modified white carbon black.

8. The anti-bacterial and anti-static polyester fiber according to claim 7, wherein the anti-bacterial and anti-static polyester fiber is characterized by, The dosage ratio of the total amount of water glass, the total amount of sodium bicarbonate, deionized water, surfactant, manganese acetate and zinc sulfate solution is 28-32g: 15-18g: 450-500mL: 10mL: 1-1.3g: 150-200mL; the dosage of the first portion of water glass accounts for 1 / 3 of the total amount of water glass; the dosage of the second portion of water glass accounts for 2 / 3 of the total amount of water glass; the dosage of the first portion of sodium bicarbonate accounts for 1 / 2 of the total amount of sodium bicarbonate; The dosage of the second portion of sodium bicarbonate accounts for 1 / 2 of the total amount of sodium bicarbonate; the surfactant is 0.05mol / L of sodium dodecyl benzene sulfonate; the concentration of the nitric acid solution is 0.1mol / L; the mass fraction of the zinc sulfate solution is 30%.

9. A process for the preparation of the anti-bacterial anti-static polyester fiber as claimed in any one of claims 1 to 8, wherein, The method comprises the following steps: Step one: weigh the modified polyester 70-85 parts, the antistatic agent 5-15 parts, the modified white carbon black 3-8 parts, the silicon nitride 1-3 parts, the silane coupling agent 1-4 parts, the antioxidant 1-2 parts and the lubricant 0.5-1 part; Step two: vacuum dry the modified polyester, the antistatic agent, the modified white carbon black and the silicon nitride, add the silane coupling agent, the antioxidant and the lubricant, transfer to the mixing machine for mixing, add to the twin-screw extruder for extrusion, cool in the water tank, granulate by the cutting machine to obtain the functional master batch; add the functional master batch to the screw spinning machine for spinning, stretch on the hot roller group, relax and heat set after stretching to obtain the antibacterial and antistatic polyester fiber.

10. A garment fabric, characterized by The garment fabric comprises the antibacterial and antistatic polyester fiber according to any one of claims 1-8. The garment fabric comprises the antibacterial and antistatic polyester fiber according to any one of claims 1-8.

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