Anti-mite degerming fabric and preparation method thereof

Abstract

The invention discloses an anti-mite degerming fabric and a preparation method thereof, and relates to the technical field of textile fabrics. When the anti-mite antibacterial fabric is prepared, firstly, glycidyl methacrylate and acrylonitrile are copolymerized, and epoxy copolymerized acrylonitrile is prepared; the preparation method comprises the following steps: modifying nano antimony tin oxide with a silane modification solution to prepare double-bond modified nano antimony tin oxide; the double-bond modified nano tin antimony oxide and 2-amino-4-hydroxy-1, 3, 5-triazine are subjected to a reaction, and modified nano tin antimony oxide is prepared; mixing epoxy copolymerized acrylonitrile with the modified nano tin antimony oxide, and spinning to obtain modified polyacrylonitrile fibers; carrying out surface modification on the modified polyacrylonitrile fiber by using vinyl cyclochlorophosphate and lauryl dimethyl tertiary amine to prepare an antibacterial modified polyacrylonitrile fiber; the antibacterial modified polyacrylonitrile fibers are spun and then woven into the fabric, and the anti-mite antibacterial fabric is prepared. The anti-mite degerming fabric prepared by the invention has the advantages of being antibacterial, anti-mite, flame-retardant, antistatic and good in mechanical property.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile fabrics, in particular to an anti-mite and bacteria-removing fabric and a preparation method thereof. BACKGROUND

[0002] With the rapid development of the textile industry, the research and preparation of functional fiber fabrics have become a major development trend in the textile industry. With the continuous improvement of people's living standards, higher requirements are put forward for living environment, and textiles with antibacterial and anti-mite functions are also favored. In the past, fabrics with antibacterial and anti-mite functions were only used in specific fields such as military and medical use, but now they have entered the lives of ordinary people, so there is a greater demand and market for functional fabrics such as antibacterial and anti-mite fabrics. Mites widely exist in household textiles and can cause a series of diseases such as allergic asthma, allergic rhinitis, allergic dermatitis, eczema, hay fever, and scabies, causing great trouble to people's lives, so it is necessary for textiles to have anti-mite function.

[0003] Various bacteria, fungi and other microorganisms exist in human living and working environment, such as common Staphylococcus aureus, Escherichia coli and Candida albicans. The metabolic products such as sweat stains and grease secreted by human body and some liquid and solid pollutants in life attached to household and clothing textiles become an ideal place for microorganisms to grow and reproduce. The large-scale reproduction of bacteria can easily produce odor gas, affect the mood of the user, cause various skin diseases and spread diseases, cause cross infection, and harm people's health. Therefore, from the perspective of disease prevention and health care, it is also meaningful for textile products to have certain antibacterial and bacteriostatic functions. SUMMARY

[0004] The purpose of the present application is to provide an anti-mite and bacteria-removing fabric and a preparation method thereof to solve the problems in the prior art.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme: An anti-mite and bacteria-removing fabric is prepared by spinning antibacterial modified polyacrylonitrile fibers and weaving them into a fabric. The antibacterial modified polyacrylonitrile fiber is prepared by surface modification of modified polyacrylonitrile fiber with ethylene chlorohydroxyphosphate and lauryl dimethyl tertiary amine; The modified polyacrylonitrile fiber is prepared by mixing epoxy copolyacrylonitrile and modified nano tin oxide antimony and spinning; The epoxy copolyacrylonitrile is prepared by copolymerization of glycidyl methacrylate and acrylonitrile; The modified nano tin oxide antimony is prepared by reacting double bond modified nano tin oxide antimony with 2-amino-4-hydroxy-1,3,5-triazine. The double bond modified nano antimony tin oxide is prepared by modifying nano antimony tin oxide with a silane modification solution.

[0006] As optimization, the spinning includes dry spinning, wet spinning, dry-wet spinning.

[0007] A preparation method of an anti-mite and bacteria-removing fabric includes the following preparation steps: (1) Under a nitrogen atmosphere, 4-5 parts of acrylonitrile, 0.75-1.05 parts of glycidyl methacrylate, and 40-50 parts of N,N-dimethylformamide are uniformly mixed, heated to 55°C, 0.024-0.03 parts of azobisdimethylvaleronitrile is added, and reacted at 60-65°C and 200-250 r / min for 19-20 h. Pour into 100-120 parts of pure water, stir at 300-400 r / min for 20-30 min, filter, soak and wash with pure water for 3-4 times, and vacuum dry at 50-60°C for 10-12 h to obtain epoxy copolyacrylonitrile; (2) 3-4 parts of nano antimony tin oxide and 25-30 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 8-10 min, 15-18 parts of a silane modification solution is added and uniformly mixed, stirred at 200-300 r / min at 60°C for reflux reaction for 8-9 h, centrifuged for 10-12 min, the precipitate is washed with anhydrous ethanol for 3-4 times, and vacuum dried at 50-60°C for 8-10 h to obtain double bond modified nano antimony tin oxide; (3) 2-3 parts of double bond modified nano antimony tin oxide, 0.5-0.6 parts of 2-amino-4-hydroxy-1,3,5-triazine, and 40-50 parts of methanol are uniformly mixed, reacted at 30-40°C and 250-350 r / min for 6-8 h in a sealed environment, the liquid is removed by centrifugation, washed with anhydrous ethanol for 3-4 times, and vacuum dried at 50-60°C for 10-12 h to obtain modified nano antimony tin oxide; (4) 11-13 parts of epoxy copolyacrylonitrile, 0.5-0.7 parts of modified nano antimony tin oxide, and 77-84 parts of dimethyl sulfoxide are uniformly mixed, ultrasonic dispersion is performed for 30-40 min, stirred at 800-1000 r / min at 60-70°C for 10-12 h, and then placed in a vacuum oven at 50-60°C for 40-48 h to remove bubbles, and a modified polyacrylonitrile fiber is prepared after spinning; (5) 2-3 parts of modified polyacrylonitrile fiber is soaked in 20-30 parts of tetrahydrofuran, 0.72-0.9 parts of triethylamine is added, the temperature is lowered to -10 to -5℃, 20-25 parts of 5wt% ethylene chlorophosphonate tetrahydrofuran solution is added dropwise at 1-1.2ml / min, after the dropwise addition is completed, stirring is carried out at -10 to -5℃ and 30-50r / min for 60-70min, the liquid is removed by suction filtration, then 5wt% lauryl dimethyl tertiary amine tetrahydrofuran solution is immersed at a bath ratio of 1:(30-40)g / ml, reflux reaction is carried out at 70℃ and 100-150r / min for 20-24h, natural cooling is carried out to room temperature, suction filtration is carried out, 3-4 times of washing is carried out with anhydrous ethanol, and vacuum drying is carried out at 60-70℃ for 10-12h, to obtain the antibacterial modified polyacrylonitrile fiber; (6) the antibacterial modified polyacrylonitrile fiber is spun into yarn on a ring spinning machine, and then woven into a fabric according to the specification requirements, to obtain the anti-mite and antibacterial fabric.

[0008]

[0009]

[0010] Compared with the prior art, the beneficial effects achieved by the present application are: In the preparation of the anti-mite and antibacterial fabric, glycidyl methacrylate is copolymerized with acrylonitrile to obtain epoxy copolymerized acrylonitrile; the nano tin antimony oxide is modified by a silane modification solution to obtain double bond modified nano tin antimony oxide; the double bond modified nano tin antimony oxide is reacted with 2-amino-4-hydroxy-1,3,5-triazine to obtain modified nano tin antimony oxide; the epoxy copolymerized acrylonitrile is mixed with the modified nano tin antimony oxide to spin to obtain modified polyacrylonitrile fiber; the modified polyacrylonitrile fiber is surface modified by ethylene chlorophosphonate and lauryl dimethyl tertiary amine to obtain antibacterial modified polyacrylonitrile fiber; the antibacterial modified polyacrylonitrile fiber is spun to weave into a fabric, to obtain the anti-mite and antibacterial fabric.

[0011] Firstly, glycidyl methacrylate is copolymerized with acrylonitrile, so that epoxy groups are introduced on the polyacrylonitrile segment, and the reactive sites of the polyacrylonitrile segment are increased; then, the nano tin antimony oxide is introduced with a double bond reactive group on the surface under the action of γ-methacryloyloxypropyl trimethoxysilane, and the dispersion performance of the nano tin antimony oxide in the polymer is improved, the nano tin antimony oxide uniformly dispersed in the polymer matrix can effectively improve the antistatic performance, and the nano tin antimony oxide can synergize with the flame retardant element to exhibit better flame retardant effect.

[0012] Secondly, the amino group on 2-amino-4-hydroxy-1, 3, 5-triazine reacts with the double bond on the surface of the modified nano antimony tin oxide by Michael addition, so as to introduce triazine groups containing a large amount of flame-retardant element nitrogen on the surface of the nano antimony tin oxide, further improve the contribution of the flame-retardant performance, and leave a hydroxyl reactive group for subsequent reaction; after mixing the epoxy copolymerized acrylonitrile with the modified nano antimony tin oxide, the modified polyacrylonitrile fiber is spun, and in the process of spinning, the epoxy group on the epoxy copolymerized acrylonitrile reacts with the hydroxyl group on the modified nano antimony tin oxide, so as to fix the modified nano antimony tin oxide in the polymer matrix in the form of a covalent bond, and improve the improvement effect of the nano antimony tin oxide on the mechanical properties.

[0013] Finally, the phosphoryl chloride group on the ethylene chlorophosphate ring reacts with the hydroxyl group on the surface of the modified polyacrylonitrile fiber first, so as to introduce the ethylene phosphate ring on the surface of the modified polyacrylonitrile fiber, and then undergoes quaternary ammonium reaction with lauryl dimethyl tertiary amine, so as to introduce the phosphate group and the quaternary ammonium group on the surface of the modified polyacrylonitrile fiber, and form a phosphatidylcholine-like structure, in which the phosphate group carries a negative charge, and the quaternary ammonium group carries a positive charge, and the two ionic properties make it have good hydrophilic performance and antistatic improvement effect; meanwhile, the phosphatidylcholine-like structure has excellent cell compatibility, and the quaternary ammonium group also has excellent antibacterial performance and anti-mite performance under the action of the dodecane carbon chain, and the cell compatibility of the phosphatidylcholine-like structure enables it to help the long carbon chain quaternary ammonium group to be adsorbed on bacteria or mites, so as to effectively exert the bactericidal effect and de-mite effect of the quaternary ammonium; the phosphate group also introduces a large amount of flame-retardant element phosphorus, which can form a synergistic flame-retardant effect with the nano antimony tin oxide and the flame-retardant elements silicon and nitrogen on the surface of the nano antimony tin oxide, so as to effectively improve the flame-retardant performance; the anti-bacterial modified polyacrylonitrile fiber is used as the raw fiber to be spun into an anti-mite and de-bacterial fabric, which has almost all the functions of the anti-bacterial modified polyacrylonitrile fiber, and the spinning specification and weaving specification can be determined according to actual needs. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0015] The following is the information of the raw materials used in all the examples and comparative examples: Nano antimony tin oxide: particle size 20 nm, model ATO-0020, item AM-ATO-038-1, purchased from Zhejiang Yamei Nanometer Technology Co., Ltd.

[0016] The silane-modified solution used in all of the following examples and comparative examples was prepared as follows: 1.1 parts of γ-methacryloxypropyltrimethoxysilane, 0.85 parts of pure water, and 9.5 parts of anhydrous ethanol were mixed uniformly, and stirred at 250 r / min at room temperature for 45 min.

[0017] The spinning in all of the following examples and comparative examples was performed using wet spinning, and the process parameters were as follows: pump supply amount was 1.5 g / min, the spinneret was 50 holes, the coagulation bath was a mixture of 30 wt% dimethyl sulfoxide and 70 wt% water, the coagulation bath temperature was 10°C, the first drawing bath was pure water at 45°C, the drawing ratio was 1.5 times, the second drawing bath was pure water at 85°C, the drawing ratio was 6 times, and then wet winding was performed using a wet winding machine.

[0018] The weaving specifications in all of the following examples and comparative examples were set as follows: the warp yarn density was 83.3 dtex, the weft yarn density was 147.6 dtex, and the warp density x weft density was 80 x 38 roots / cm. Example 1

[0019] A preparation method of a mite-proof and bacteria-removing fabric, the preparation method of the mite-proof and bacteria-removing fabric comprising the following preparation steps: (1) Under a nitrogen atmosphere, 4 parts of acrylonitrile, 0.75 parts of glycidyl methacrylate, and 40 parts of N,N-dimethylformamide were mixed uniformly, heated to 55°C, 0.024 parts of azobisisoheptanenitrile was added, reacted at 60°C and 200 r / min for 20 h, poured into 100 parts of pure water, stirred at 300 r / min for 30 min, filtered, washed with pure water for 3 times, and vacuum dried at 50°C for 12 h to prepare an epoxy copolyacrylonitrile; (2) 3 parts of nano antimony tin oxide and 25 parts of anhydrous ethanol were mixed uniformly, ultrasonically dispersed for 8 min, 15 parts of the silane-modified solution was added and mixed uniformly, stirred at 60°C and 200 r / min for 9 h, centrifuged for 10 min, the precipitate was washed with anhydrous ethanol for 3 times, and vacuum dried at 50°C for 10 h to prepare a double bond-modified nano antimony tin oxide; (3) 2 parts of the double bond-modified nano antimony tin oxide, 0.5 parts of 2-amino-4-hydroxy-1,3,5-triazine, and 40 parts of methanol were mixed uniformly, reacted in a sealed environment at 30°C and 250 r / min for 8 h, the liquid was removed by centrifugation, the precipitate was washed with anhydrous ethanol for 3 times, and vacuum dried at 50°C for 12 h to prepare a modified nano antimony tin oxide; (4) 11 parts of epoxy copolyacrylonitrile, 0.5 parts of modified nano antimony tin oxide, 77 parts of dimethyl sulfoxide by mass fraction were mixed uniformly, ultrasonic dispersion for 30 min, stirring at 60°C, 800 r / min for 12 h, and then placed in a vacuum oven at 50°C for 48 h to remove bubbles. The modified polyacrylonitrile fiber was prepared after spinning; (5) 2 parts of modified polyacrylonitrile fiber were soaked in 20 parts of tetrahydrofuran, 0.72 parts of triethylamine was added, and the temperature was lowered to -10°C. 20 parts of 5wt% ethylene chlorophosphonate solution in tetrahydrofuran was added dropwise at a rate of 1 ml / min. After the dropwise addition was completed, stirring was carried out at -10°C and 30 r / min for 70 min. The liquid was removed by suction filtration. Then, it was immersed in a 5wt% lauryl dimethyl tertiary amine solution in tetrahydrofuran at a bath ratio of 1:30 g / ml. Reflux reaction was carried out at 70°C and 100 r / min for 24 h. After natural cooling to room temperature, suction filtration was carried out. Washing was carried out 3 times with anhydrous ethanol. Vacuum drying was carried out at 60°C for 12 h to obtain antibacterial modified polyacrylonitrile fiber; (6) The antibacterial modified polyacrylonitrile fiber was spun into yarn on a ring spinning machine and woven into fabric according to the specification requirements to obtain a mite-proof and antibacterial fabric. Implementation:2:

[0020] A preparation method of a mite-proof and antibacterial fabric, the preparation method of the mite-proof and antibacterial fabric comprises the following preparation steps: (1) 4.5 parts of acrylonitrile, 0.9 parts of glycidyl methacrylate, and 45 parts of N,N-dimethylformamide by mass fraction were mixed uniformly under a nitrogen atmosphere. The temperature was raised to 55°C. 0.027 parts of azobis diisopropyl cyanide was added. Reaction was carried out at 60°C and 225 r / min for 19.5 h. It was poured into 110 parts of pure water and stirred at 350 r / min for 25 min. Suction filtration was carried out. Washing was carried out 3 times with pure water. Vacuum drying was carried out at 55°C for 11 h to obtain epoxy copolyacrylonitrile; (2) 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol by mass fraction were mixed uniformly and ultrasonic dispersion was carried out for 9 min. 16.5 parts of silane modification solution was added and mixed uniformly. Reflux reaction was carried out at 60°C and 250 r / min for 8.5 h. Centrifugation was carried out for 11 min. The precipitate was washed 3 times with anhydrous ethanol by centrifugation. Vacuum drying was carried out at 55°C for 9 h to obtain double bond modified nano antimony tin oxide; (3) 2.5 parts of double bond modified nano antimony tin oxide, 0.55 parts of 2-amino-4-hydroxy-1,3,5-triazine, and 45 parts of methanol by mass fraction were mixed uniformly. Reaction was carried out in a sealed environment at 35°C and 300 r / min for 7 h. The liquid was removed by centrifugation. Washing was carried out 3 times with anhydrous ethanol by centrifugation. Vacuum drying was carried out at 55°C for 11 h to obtain modified nano antimony tin oxide; (4) 12 parts of epoxy copolyacrylonitrile, 0.6 parts of modified nano antimony tin oxide, 80.5 parts of dimethyl sulfoxide were mixed uniformly, ultrasonic dispersion for 35 min, stirring at 65°C, 900 r / min for 11 h, and then static defoaming in a vacuum oven at 55°C for 44 h, to obtain modified polyacrylonitrile fibers after spinning; (5) 2.5 parts of modified polyacrylonitrile fibers were soaked in 25 parts of tetrahydrofuran, 0.81 parts of triethylamine was added, and the temperature was lowered to -8°C. 22.5 parts of 5 wt% ethylene chlorophosphonate solution in tetrahydrofuran was added dropwise at a rate of 1.1 ml / min. After the dropwise addition was completed, stirring was carried out at -8°C and 40 r / min for 65 min. The liquid was removed by suction filtration. Then, the fibers were immersed in a 5 wt% lauryl dimethyl tertiary amine solution in tetrahydrofuran at a bath ratio of 1:35 g / ml. Reflux reaction was carried out at 70°C and 125 r / min for 22 h. The temperature was allowed to cool to room temperature naturally. The fibers were washed with anhydrous ethanol for 3 times. Vacuum drying was carried out at 65°C for 11 h to obtain antibacterial modified polyacrylonitrile fibers; (6) The antibacterial modified polyacrylonitrile fibers were spun into yarns on a ring spinning machine, and then woven into fabrics according to the required specifications to obtain anti-mite and antibacterial fabrics. Implementation: 3:

[0021] A preparation method of anti-mite and antibacterial fabrics, the preparation method of the anti-mite and antibacterial fabrics comprises the following preparation steps: (1) 5 parts of acrylonitrile, 1.05 parts of glycidyl methacrylate, and 50 parts of N,N-dimethylformamide were mixed uniformly under a nitrogen atmosphere. The temperature was raised to 55°C. 0.03 parts of azobisisoheptanenitrile was added. Reaction was carried out at 65°C and 250 r / min for 19 h. The mixture was poured into 120 parts of pure water and stirred at 400 r / min for 20 min. The mixture was suction filtered and washed with pure water for 4 times. Vacuum drying was carried out at 60°C for 10 h to obtain epoxy copolyacrylonitrile; (2) 4 parts of nano antimony tin oxide and 30 parts of anhydrous ethanol were mixed uniformly and ultrasonic dispersed for 10 min. 18 parts of silane modification solution was added and mixed uniformly. Reflux reaction was carried out at 60°C and 300 r / min for 8 h. Centrifugation was carried out for 12 min. The precipitate was washed with anhydrous ethanol by centrifugation for 4 times. Vacuum drying was carried out at 60°C for 8 h to obtain double bond modified nano antimony tin oxide; (3) 3 parts of double bond modified nano antimony tin oxide, 0.6 parts of 2-amino-4-hydroxy-1,3,5-triazine, and 50 parts of methanol were mixed uniformly in a sealed environment. Reaction was carried out at 40°C and 350 r / min for 6 h. The liquid was removed by centrifugation. The precipitate was washed with anhydrous ethanol by centrifugation for 4 times. Vacuum drying was carried out at 60°C for 10 h to obtain modified nano antimony tin oxide; (4) 13 parts of epoxy copolyacrylonitrile, 0.7 parts of modified nano antimony tin oxide, 84 parts of dimethyl sulfoxide were mixed uniformly, ultrasonic dispersion was performed for 40 min, stirring was performed at 70°C and 1000 r / min for 10 h, and then static defoaming was performed in a vacuum oven at 60°C for 40 h to prepare modified polyacrylonitrile fibers after spinning; (5) 3 parts of modified polyacrylonitrile fibers were soaked in 30 parts of tetrahydrofuran, 0.9 parts of triethylamine was added, the temperature was reduced to -5°C, 25 parts of 5 wt% ethylene chlorophosphonate in tetrahydrofuran solution was added dropwise at a rate of 1.2 ml / min, stirring was performed at -5°C and 50 r / min for 60 min after the dropwise addition was completed, the liquid was removed by suction filtration, 5 wt% lauryl dimethyl tertiary amine in tetrahydrofuran solution was immersed at a bath ratio of 1:40 g / ml, reflux reaction was performed at 70°C and 150 r / min for 20 h, natural cooling was performed to room temperature, suction filtration was performed, washing was performed with anhydrous ethanol for 4 times, and vacuum drying was performed at 70°C for 10 h to prepare antibacterial modified polyacrylonitrile fibers; (6) The antibacterial modified polyacrylonitrile fibers were spun into yarns on a ring spinning machine, and then were woven into fabrics according to the specification requirements to prepare anti-mite and antibacterial fabrics.

[0022] Comparative Example 1: The preparation method of the anti-mite and antibacterial fabric of Comparative Example 1 is different from that of Example 2 in that step (2) is modified, that is, 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol were uniformly mixed, ultrasonic dispersion was performed for 9 min, 7.29 parts of a silane modification solution was added and uniformly mixed, reflux reaction was performed at 60°C and 250 r / min for 8.5 h, centrifugation was performed for 11 min, the precipitate was washed with anhydrous ethanol by centrifugation for 3 times, and vacuum drying was performed at 55°C for 9 h to prepare double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0023] Comparative Example 2: The preparation method of the anti-mite and antibacterial fabric of Comparative Example 2 is different from that of Example 2 in that step (2) is modified, that is, 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol were uniformly mixed, ultrasonic dispersion was performed for 9 min, 10.94 parts of a silane modification solution was added and uniformly mixed, reflux reaction was performed at 60°C and 250 r / min for 8.5 h, centrifugation was performed for 11 min, the precipitate was washed with anhydrous ethanol by centrifugation for 3 times, and vacuum drying was performed at 55°C for 9 h to prepare double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0024] Comparative Example 3: The preparation method of the anti-mite and sterilization fabric of Comparative Example 3 is different from that of Example 2 in that step (2) is modified. In step (2), 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 21.875 parts of a silane modified solution is added and uniformly mixed, reflux reaction is performed at 60°C and 250 r / min for 8.5 h, centrifugation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times by centrifugation, and vacuum drying is performed at 55°C for 9 h to obtain double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0025] Comparative Example 4: The preparation method of the anti-mite and sterilization fabric of Comparative Example 4 is different from that of Example 2 in that step (2) is modified. In step (2), 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 25.52 parts of a silane modified solution is added and uniformly mixed, reflux reaction is performed at 60°C and 250 r / min for 8.5 h, centrifugation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times by centrifugation, and vacuum drying is performed at 55°C for 9 h to obtain double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0026] Comparative Example 5: The preparation method of the anti-mite and sterilization fabric of Comparative Example 5 is different from that of Example 2 in that step (2) is modified. In step (2), 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 16.5 parts of a silane modified solution is added and uniformly mixed, reflux reaction is performed at 40°C and 250 r / min for 8.5 h, centrifugation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times by centrifugation, and vacuum drying is performed at 55°C for 9 h to obtain double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0027] Comparative Example 6: The preparation method of the anti-mite and sterilization fabric of Comparative Example 6 is different from that of Example 2 in that step (2) is modified. In step (2), 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 16.5 parts of a silane modified solution is added and uniformly mixed, reflux reaction is performed at 50°C and 250 r / min for 8.5 h, centrifugation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times by centrifugation, and vacuum drying is performed at 55°C for 9 h to obtain double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0028] Comparative Example 7: The preparation method of the anti-mite and sterilization fabric of Comparative Example 7 is different from that of Example 2 in that step (2) is modified. In step (2), 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 16.5 parts of a silane modified solution is added and uniformly mixed, reflux reaction is performed at 70°C and 250 r / min for 8.5 h, centrifugation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times, and vacuum drying is performed at 55°C for 9 h to obtain double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0029] Comparative Example 8: The preparation method of the anti-mite and sterilization fabric of Comparative Example 8 is different from that of Example 2 in that step (2) is modified. In step (2), 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 16.5 parts of a silane modified solution is added and uniformly mixed, reflux reaction is performed at 80°C and 250 r / min for 8.5 h, centrifugation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times, and vacuum drying is performed at 55°C for 9 h to obtain double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0030] Comparative Example 9: The preparation method of the anti-mite and sterilization fabric of Comparative Example 9 is different from that of Example 2 in that step (2) is modified. In step (2), 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 16.5 parts of a silane modified solution is added and uniformly mixed, reflux reaction is performed at 60°C and 250 r / min for 4 h, centrifugation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times, and vacuum drying is performed at 55°C for 9 h to obtain double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0031] Comparative Example 10: The preparation method of the anti-mite and sterilization fabric of Comparative Example 10 is different from that of Example 2 in that step (2) is modified. In step (2), 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 16.5 parts of a silane modified solution is added and uniformly mixed, reflux reaction is performed at 60°C and 250 r / min for 6 h, centrifugation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times, and vacuum drying is performed at 55°C for 9 h to obtain double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0032] Comparative Example 11: The preparation method of the anti-mite and sterilization fabric of Comparative Example 11 is different from that of Example 2 in that step (2) is modified, and step (2) is modified as follows: 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 16.5 parts of silane modified solution are added and uniformly mixed, reflux reaction is performed at 60°C and 250 r / min for 11 h, centrifugal separation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times, and vacuum drying is performed at 55°C for 9 h to prepare double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0033] Comparative Example 12: The preparation method of the anti-mite and sterilization fabric of Comparative Example 12 is different from that of Example 2 in that step (2) is modified, and step (2) is modified as follows: 3.5 parts of nano antimony tin oxide, 28 parts of anhydrous ethanol are uniformly mixed, ultrasonic dispersion is performed for 9 min, 16.5 parts of silane modified solution are added and uniformly mixed, reflux reaction is performed at 60°C and 250 r / min for 13 h, centrifugal separation is performed for 11 min, the precipitate is washed with anhydrous ethanol for 3 times, and vacuum drying is performed at 55°C for 9 h to prepare double bond modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0034] Comparative Example 13: The preparation method of the anti-mite and sterilization fabric of Comparative Example 13 is different from that of Example 2 in that step (1) is modified, and step (1) is modified as follows: 4.5 parts of acrylonitrile, 45 parts of N,N-dimethylformamide are uniformly mixed under a nitrogen atmosphere, the temperature is increased to 55°C, 0.027 parts of azobisisoheptyl nitrile is added, reaction is performed at 60°C and 225 r / min for 19.5 h, 110 parts of pure water is poured in, stirring is performed at 350 r / min for 25 min, suction filtration is performed, washing is performed with pure water for 3 times, and vacuum drying is performed at 55°C for 11 h to prepare polyacrylonitrile; step (4) is modified as follows: 12 parts of polyacrylonitrile, 0.6 parts of modified nano antimony tin oxide, 80.5 parts of dimethyl sulfoxide are uniformly mixed, ultrasonic dispersion is performed for 35 min, stirring is performed at 65°C and 900 r / min for 11 h, and then static defoaming is performed in a vacuum oven at 55°C for 44 h to prepare modified polyacrylonitrile fiber after spinning. The remaining steps are the same as those of Example 2.

[0035] Comparative Example 14: The preparation method of the anti-mite and sterilization fabric of Comparative Example 14 is different from that of Example 2 in that step (2) is not performed, and step (3) is modified as follows: 2.5 parts of nano antimony tin oxide, 0.55 parts of 2-amino-4-hydroxy-1,3,5-triazine, 45 parts of methanol are uniformly mixed, reaction is performed in a sealed environment at 35°C and 300 r / min for 7 h, liquid is removed by centrifugal separation, the precipitate is washed with anhydrous ethanol for 3 times, and vacuum drying is performed at 55°C for 11 h to prepare modified nano antimony tin oxide. The remaining steps are the same as those of Example 2.

[0036] Comparative Example 15: The preparation method of the anti-mite and sterilization fabric of Comparative Example 15 is different from that of Example 2 in that step (3) is not performed, and step (4) is modified as follows: 12 parts by mass of epoxy copolyacrylonitrile, 0.6 part by mass of double bond modified nano-tin-antimony oxide, and 80.5 parts by mass of dimethyl sulfoxide are uniformly mixed, ultrasonic dispersion is performed for 35 min, stirring is performed at 65°C and 900 r / min for 11 h, and then static defoaming is performed in a vacuum oven at 55°C for 44 h, to obtain modified polyacrylonitrile fibers after spinning. The remaining steps are the same as those of Example 2.

[0037] Comparative Example 16: The preparation method of the anti-mite and sterilization fabric of Comparative Example 16 is different from that of Example 2 in that steps (2) and (3) are not performed, and step (4) is modified as follows: 12 parts by mass of epoxy copolyacrylonitrile and 80.5 parts by mass of dimethyl sulfoxide are uniformly mixed, ultrasonic dispersion is performed for 35 min, stirring is performed at 65°C and 900 r / min for 11 h, and then static defoaming is performed in a vacuum oven at 55°C for 44 h, to obtain modified polyacrylonitrile fibers after spinning. The remaining steps are the same as those of Example 2.

[0038] Comparative Example 17: The preparation method of the anti-mite and sterilization fabric of Comparative Example 17 is different from that of Example 2 in that step (5) is different, and step (5) is modified as follows: 2.5 parts by mass of modified polyacrylonitrile fibers are immersed in a 5 wt% lauryl dimethyl tertiary amine solution in tetrahydrofuran at a bath ratio of 1:35 g / ml, reflux reaction is performed at 70°C and 125 r / min for 22 h, natural cooling is performed to room temperature, suction filtration is performed, washing is performed with anhydrous ethanol for 3 times, and vacuum drying is performed at 65°C for 11 h, to obtain antibacterial modified polyacrylonitrile fibers. The remaining steps are the same as those of Example 2.

[0039] Comparative Example 18: The preparation method of the anti-mite and sterilization fabric of Comparative Example 18 is different from that of Example 2 in that step (5) is different, and step (5) is modified as follows: 2.5 parts by mass of modified polyacrylonitrile fibers are immersed in 25 parts of tetrahydrofuran, 0.81 parts of triethylamine is added, the temperature is lowered to -8°C, 22.5 parts of a 5 wt% ethylene vinyl chlorophosphonate solution in tetrahydrofuran is added dropwise at a rate of 1.1 ml / min, stirring is performed at -8°C and 40 r / min for 65 min after the dropwise addition is completed, suction filtration is performed to remove the liquid, washing is performed with pure water for 3 times, and vacuum drying is performed at 65°C for 11 h, to obtain antibacterial modified polyacrylonitrile fibers. The remaining steps are the same as those of Example 2.

[0040] Comparative Example 19: The preparation method of the anti-mite and sterilization fabric of Comparative Example 19 is different from that of Example 2 in that step (5) is not performed, and step (6) is modified as follows: after the modified polyacrylonitrile fibers are spun into yarns on a ring spinning machine, the yarns are woven into a fabric according to the required specifications to obtain the anti-mite and sterilization fabric. The remaining steps are the same as those of Example 2.

[0041] Test Example 1: Optimum condition confirmation: the optimum reaction conditions for preparing the double bond modified nano tin oxide antimony were confirmed by adjusting the amount of silane coupling agent added, the reaction temperature and the reaction time in step (2), and the dispersion stability was evaluated. In the modification of nano tin oxide antimony, the content of surface modification is different due to different reaction conditions, and the stability in the dispersion liquid is also different. Therefore, the double bond modified nano tin oxide antimony prepared in the examples and comparative examples was dispersed in anhydrous ethanol at 4wt%, first stirred at 150r / min for 24h in a 40℃ constant temperature water bath, then ultrasonically treated in an ice water bath for 8min, and then centrifuged at 3000rpm for 5min. The supernatant was tested for light transmittance at 530nm. The higher the light transmittance, the worse the dispersion stability and the modification effect.

[0042]

[0043] From the experimental data of Example 2 and Comparative Examples 1~12 in Table 1, it can be found that in the reaction process of modifying the nano tin oxide antimony in step (2), the mass ratio of silane coupling agent / nano tin oxide antimony is between 0.43~0.48, the reaction temperature is 60℃, and the reaction time is 8~9h, which are the optimum conditions, and the modification effect is better.

[0044] By comparing the data in the table, the data of Comparative Examples 1-2 shows that when the amount of silane coupling agent is reduced, the modification effect is poor. This is because the amount of silane coupling agent is too small to completely wrap the surface of the modified nano-silicon oxide antimony, resulting in a lower modification effect. The data of Comparative Examples 3-4 shows that when too much silane coupling agent is added, the modification effect will also decrease. This is because there is too much silane coupling agent left after the surface modification of nano-silicon oxide antimony is completed. The siloxane on the silane coupling agent undergoes excessive crosslinking reaction, resulting in the crosslinking and agglomeration of nano-silicon oxide antimony particles, forming large clusters, and thus reducing the dispersion stability and modification effect. The data of Comparative Examples 5-6 shows that when the reaction temperature is low, the surface modification reaction rate of silane coupling agent is slow, and the surface modification cannot be completed within the specified reaction time. The data of Comparative Examples 7-8 shows that when the reaction temperature is too high, the surface modification reaction is accelerated, and the double bond on the silane coupling agent is activated at high temperature, causing the double bond to be consumed prematurely. As a result, nano-silicon oxide antimony particles crosslink and agglomerate together to form clusters, reducing the dispersion stability and modification effect. The data of Comparative Examples 9-10 shows that when the reaction time is short, the silane coupling agent cannot complete the modification, resulting in poor modification effect. The data of Comparative Examples 11-12 shows that too long reaction time will also lead to a decrease in modification effect. This is because the silane coupling agent contains active double bonds, and the crosslinking and agglomeration reaction between the activated double bond functional groups will occur when the reaction time is too long. This leads to the agglomeration of nano-silicon oxide antimony particles to form clusters, thereby reducing the modification effect.

[0045] Test Example 2: Mechanical property test: The breaking strength of the prepared anti-mite and bacteria-removing fabric was tested according to GB / T 3923.1-2013 to evaluate its mechanical properties. The sample size was 25 cm x 5 cm, the gauge distance was (200 ± 1) mm, the tensile rate was 100 mm / min, each group was tested in parallel for 15 times, and the average value was recorded.

[0046] Flame retardant performance test: The limiting oxygen index of the prepared anti-mite and bacteria-removing fabric was tested according to GB / T 5454-1997, the sample size was 158 mm x 58 mm, each group was tested for 15 samples, and the average value was recorded.

[0047] Antistatic property test: The surface resistivity of the prepared anti-mite and bacteria-removing fabric was tested according to GB / T 12703.4-2010 to evaluate its antistatic property, each group was tested in parallel for 5 times, and the average value was recorded.

[0048]

[0049] From the experimental data comparison of examples 1~3 and comparative examples 13~19 in table 2, it can be found that the anti-mite and sterilization fabric prepared by the present application has good mechanical properties, flame retardant properties and anti-static properties.

[0050] Through the data comparison in the table, the data of comparative example 13 shows that the introduction of epoxy group on the polyacrylonitrile segment improves the reactive site, and the modified nano antimony tin oxide can be fixed in the polymer matrix through covalent bond reaction, thereby improving the breaking strength. The surface modification of vinyl chlorophosphonate and lauryl dimethyl tertiary amine is also based on more hydroxyl reaction functional groups and has better modification effect. When the epoxy group on the polyacrylonitrile segment is lost, the surface modification can only be carried out on the hydroxyl site on the modified nano antimony tin oxide exposed on the surface, thereby leading to a decrease in surface modification effect and a decrease in flame retardant and anti-static properties. The data of comparative examples 14~15 shows that the silane coupling agent and 2-amino-4-hydroxy-1,3,5-triazine are successfully introduced on the surface of nano antimony tin oxide, and 2-amino-4-hydroxy-1,3,5-triazine reacts with the double bond on the silane coupling agent through the amino group, and reacts with the epoxy group and vinyl chlorophosphonate through the hydroxyl group, thereby providing higher modification effect. A large number of flame-retardant elements nitrogen and phosphorus on 2-amino-4-hydroxy-1,3,5-triazine form a synergistic flame-retardant effect to improve the flame-retardant effect. The data of comparative example 16 shows that the addition of modified nano antimony tin oxide effectively improves the mechanical properties of the anti-mite and sterilization fabric through its nano modification effect and covalent bond connection. The hydroxyl group on the modified nano antimony tin oxide reacts with the epoxy group on the copolymer chain to release more reactive groups, thereby increasing the abundance of surface hydroxyl reaction groups, so that more vinyl chlorophosphonate and lauryl dimethyl tertiary amine can be surface modified, providing higher flame retardant and anti-static properties. Meanwhile, the modified nano antimony tin oxide itself also has good conductive properties, which can form a synergistic effect with the phosphate group and quaternary ammonium group on the surface to obtain better anti-static effect. The data of comparative example 17 shows that vinyl chlorophosphonate is successfully modified to the surface of modified polyacrylonitrile fiber, and active groups are obtained for subsequent reaction with lauryl dimethyl tertiary amine. While the introduction of flame-retardant elements improves the flame-retardant properties, it also significantly improves the anti-static properties. The data of comparative example 18 shows that lauryl dimethyl tertiary amine successfully undergoes quaternary ammonium reaction with vinyl chlorophosphonate, thereby introducing phosphate groups and quaternary ammonium groups, effectively improving the anti-static properties. The data of comparative example 19 shows that the surface modification of vinyl chlorophosphonate and lauryl dimethyl tertiary amine introduces flame-retardant element phosphorus to improve the flame-retardant properties, and introduces phosphate groups containing negative charges and quaternary ammonium groups containing positive charges, thereby improving the anti-static properties.

[0051] Test example 3: Antibacterial performance test: according to GB / T 20944.3-2008, the prepared anti-mite and sterilization fabric was cut into 0.75±0.05g sample, mixed with bacteria solution and oscillated for 5min, then the oscillated bacteria solution was taken to agar medium for culture, the inhibition rate of the anti-mite and sterilization fabric on E. coli and S. aureus was determined by the number of growing bacteria, each group of samples was tested 5 times, and the average value was recorded.

[0052] Mite removal performance test: according to the inhibition method in GB / T 24253-2009, the inhibition rate of the prepared anti-mite and sterilization fabric on mites was tested, each group was tested 5 times in parallel, and the average value was recorded.

[0053]

[0054] From the experimental data comparison of examples 1-3 and comparative examples 13-19 in table 3, it can be found that the prepared anti-mite and sterilization fabric has good antibacterial and mite removal performance.

[0055] Through the data comparison in the table, the data of comparative example 13 shows that the introduction of epoxy group on the epoxy copolyacrylonitrile provides more reaction groups, so that more phosphoric acid groups and quaternary ammonium groups can be introduced during surface modification, and more phosphocholine-like structures can be introduced, which effectively improves the antibacterial and mite removal performance; the data of comparative examples 14-16 shows that the ring chlorophosphonate is used as the grafting reaction site of the remaining hydroxyl group after the reaction of the epoxy group on the epoxy copolyacrylonitrile and the hydroxyl group on the modified nano tin oxide antimony, when the modified nano tin oxide antimony is not modified with double bond and grafted with 2-amino-4-hydroxy-1,3,5-triazine, the ring chlorophosphonate can only graft with part of the hydroxyl groups left by the self-opening of the epoxy group, resulting in a decrease in grafting rate, thereby reducing the antibacterial and mite removal performance; the data of comparative examples 17-19 shows that the ring chlorophosphonate reacts with lauryl dimethyl tertiary amine to be quaternized, thereby introducing phosphoric acid groups, quaternary ammonium groups and phosphocholine-like structures with good antibacterial and mite removal performance.

[0056] The above specific embodiments further illustrate the purpose, technical solutions and advantages of the present application, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A mite-proof and bacteria-removing fabric, characterized by comprising: The anti-mite and sterilization fabric is prepared by spinning the anti-mite and sterilization fabric after the anti-mite and sterilization fabric is woven. The anti-mite and sterilization fabric is prepared by spinning the anti-mite and sterilization fabric after the anti-mite and sterilization fabric is woven. The modified polyacrylonitrile fiber is prepared by spinning the modified polyacrylonitrile fiber after the epoxy copolyacrylonitrile and the modified nano tin oxide antimony are mixed. The epoxy copolyacrylonitrile is prepared by copolymerizing glycidyl methacrylate and acrylonitrile. The modified nano tin oxide antimony is prepared by reacting the double bond modified nano tin oxide antimony with 2-amino-4-hydroxy-1,3,5-triazine. The double bond modified nano tin oxide antimony is prepared by modifying the nano tin oxide antimony with a silane modification solution.

2. The anti-mite and sterilizing fabric according to claim 1, characterized in that, The spinning includes dry spinning, wet spinning and dry-wet spinning.

3. A method for preparing an anti-mite and sterilizing fabric, characterized in that, The preparation steps include: (1) Under a nitrogen atmosphere, acrylonitrile, glycidyl methacrylate and N,N-dimethylformamide are mixed, azobis (isobutyronitrile) is added after heating, and stirring is performed after heating, then the mixture is poured into pure water, filtered, washed and dried to obtain epoxy copolyacrylonitrile; (2) The nano tin oxide antimony and anhydrous ethanol are mixed, ultrasonic dispersion is performed, a silane modification solution is added and mixed, heating and stirring are performed, reflux reaction is performed, centrifugation is performed, washing is performed, and drying is performed to obtain double bond modified nano tin oxide antimony; (3) The double bond modified nano tin oxide antimony, 2-amino-4-hydroxy-1,3,5-triazine and methanol are mixed uniformly, heating and stirring are performed in a sealed environment, centrifugation is performed, washing is performed, and drying is performed to obtain modified nano tin oxide antimony; (4) The epoxy copolyacrylonitrile, the modified nano tin oxide antimony and dimethyl sulfoxide are mixed, ultrasonic dispersion is performed, heating and stirring are performed, vacuum standing is performed to remove bubbles, and the modified polyacrylonitrile fiber is prepared after spinning; (5) The modified polyacrylonitrile fiber is soaked in tetrahydrofuran, triethylamine is added, cooling is performed, the ethylene chlorophosphate solution in tetrahydrofuran is added dropwise, low-temperature stirring is performed after dropwise addition is completed, filtration is performed, the modified polyacrylonitrile fiber is immersed in the tetrahydrofuran solution of lauryl dimethyl tertiary amine, heating and stirring are performed, reflux reaction is performed, cooling is performed, filtration is performed, washing is performed, and drying is performed to obtain the anti-mite and sterilization fabric. (6) The anti-mite and sterilization fabric is prepared by spinning the anti-mite and sterilization fabric on a ring spinning machine after the anti-mite and sterilization fabric is woven into yarn according to the specifications.

4. The method for preparing the anti-mite and sterilization fabric according to claim 3, characterized in that, In step (1), under a nitrogen atmosphere, 4-5 parts of acrylonitrile, 0.75-1.05 parts of glycidyl methacrylate and 40-50 parts of N,N-dimethylformamide are uniformly mixed, heated to 55°C, 0.024-0.03 parts of azobis (isobutyronitrile) is added, stirring is performed at 60-65°C for 19-20 hours, 100-120 parts of pure water is poured in, stirring is performed for 20-30 minutes, filtration is performed, washing is performed by soaking in pure water, and vacuum drying is performed at 50-60°C for 10-12 hours.

5. The method for preparing the anti-mite and sterilization fabric according to claim 3, characterized in that, The double bond modified nano tin oxide antimony in step (2) is prepared by mixing 3-4 parts of nano tin oxide antimony, 25-30 parts of anhydrous ethanol uniformly, ultrasonic dispersion, adding 15-18 parts of silane modification solution uniformly, stirring reflux reaction at 60°C for 8-9h, centrifugal washing for 10-12 min, precipitating with anhydrous ethanol, and vacuum drying at 50-60°C for 8-10h.

6. The method of claim 3, wherein the fabric is a fabric for preventing mites and sterilizing bacteria. The silane modification solution in step (2) is prepared by mixing 1-1.2 parts of γ-methacryloyloxypropyl trimethoxysilane, 0.8-0.9 parts of pure water, and 9-10 parts of anhydrous ethanol uniformly, stirring at 200-300r / min for 40-50 min at room temperature, and preparing.

7. The method of claim 3, wherein the fabric is a fabric for preventing mites and sterilizing bacteria. The modified nano tin oxide antimony in step (3) is prepared by mixing 2-3 parts of double bond modified nano tin oxide antimony, 0.5-0.6 parts of 2-amino-4-hydroxy-1,3,5-triazine, and 40-50 parts of methanol uniformly, stirring reaction at 30-40°C for 6-8h in a closed environment, removing liquid by centrifugation, centrifugal washing with anhydrous ethanol, and vacuum drying at 50-60°C for 10-12h.

8. The method of claim 3, wherein the fabric is a fabric for preventing mites and sterilizing bacteria. The modified polyacrylonitrile fiber in step (4) is prepared by mixing 11-13 parts of epoxy copolyacrylonitrile, 0.5-0.7 parts of modified nano tin oxide antimony, and 77-84 parts of dimethyl sulfoxide uniformly, ultrasonic dispersion, stirring at 800-1000r / min for 10-12h at 60-70°C, static defoaming in a vacuum oven at 50-60°C, and spinning after spinning.

9. The method of claim 3, wherein the fabric is a fabric for preventing mites and sterilizing bacteria. The spinning in step (4) is performed by using wet spinning, and the process parameters are as follows: pump supply amount is 1.5g / min, spinneret is 50 holes, coagulation bath is a mixture of 30wt% dimethyl sulfoxide and 70wt% water, coagulation bath temperature is 10°C, first drawing bath is pure water at 40-50°C, drawing ratio is 1.5 times, second drawing bath is pure water at 80-90°C, drawing ratio is 6 times, and then wet circle winding machine is used for winding.

10. The method of claim 3, wherein the fabric is a fabric for preventing mites and sterilizing bacteria. The antibacterial modified polyacrylonitrile fiber in step (5) is prepared by immersing 2-3 parts of modified polyacrylonitrile fiber in 20-30 parts of tetrahydrofuran, adding 0.72-0.9 parts of triethylamine, cooling to-10--5°C, adding 20-25 parts of 5wt% ethylene chlorophosphonate tetrahydrofuran solution at 1-1.2ml / min, stirring at-10--5°C for 60-70min after dropping completion, removing liquid by suction filtration, immersing in 5wt% lauryl dimethyl tertiary amine tetrahydrofuran solution at a bath ratio of 1:(30-40)g / ml, stirring reflux reaction at 70°C for 20-24h, natural cooling to room temperature, suction filtration, washing with anhydrous ethanol, and vacuum drying at 60-70°C for 10-12h.

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