Multifunctional composite acrylic fabric and preparation method thereof

Abstract

The present application relates to the technical field of textile fabric, and discloses a multifunctional composite acrylic fabric and a preparation method thereof, the multifunctional composite acrylic fabric is obtained by treating acrylic fabric with sodium hydroxide solution and finishing liquid in sequence; the finishing liquid is prepared from deionized water, a crosslinking agent, nano silicon dioxide, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinyl pyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano zinc oxide and ammonium persulfate aqueous solution; the quaternary ammonium salt modified nano zinc oxide is prepared from ethanol aqueous solution, nano zinc oxide, gamma-methacryloxypropyl trimethoxysilane, hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate; and the crosslinking agent is prepared from hydroxyl silicone oil, isophorone diisocyanate, dibutyl tin dilaurate catalyst and methanol; the present application has good wear resistance, waterproofness and antibacterial property.

Description

Technical Field

[0001] This invention relates to the field of textile fabric technology, specifically to a multifunctional composite acrylic fabric and its preparation method. Background Technology

[0002] Acrylic fabrics are widely used in clothing, home textiles, and decorative fabrics due to their excellent warmth retention, weather resistance, and chemical stability, as well as their soft hand feel and vibrant colors. With the improvement of people's living standards and the diversification of application scenarios, the market is placing higher demands on the functionality of acrylic fabrics.

[0003] Patent CN104452280B discloses a method for preparing flame-retardant and antibacterial acrylic fabric. The preparation method includes the following steps: (1) Take triaryl phosphate, trichloroethyl phosphate, Tween-65, glycerol and water by weight, heat and stir the above five components until uniform; (2) Immerse the acrylic fabric completely in the flame-retardant finishing solution prepared in step (1), place it at room temperature for 1.5 hours, dip and rub twice, with a pick-up rate of 60%, and dry at 95°C; (3) Take ammonium dihydrogen phosphate, chitosan and 20wt% ethanol-water extract of Zephyranthes by weight, dissolve in water, and stir evenly after dissolving; (4) After stirring evenly, immerse the acrylic fabric treated in step (2) completely in the antibacterial finishing solution in step (3), place it at room temperature for 2 hours, dip and rub twice, with a pick-up rate of 80%, and dry at 95°C. After drying, it is a flame-retardant and antibacterial acrylic fabric. However, acrylic fabrics themselves have insufficient abrasion resistance and are prone to problems such as pilling, snagging, and wear during frequent use, which affects the service life of the fabric and has poor waterproof performance. Summary of the Invention

[0004] The purpose of this invention is to provide a multifunctional composite acrylic fabric and its preparation method, so as to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A multifunctional composite acrylic fabric is obtained by sequentially treating acrylic fabric with an aqueous sodium hydroxide solution and a finishing solution. The finishing solution is prepared from deionized water, a crosslinking agent, nano-silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano-zinc oxide, and an aqueous solution of ammonium persulfate. The quaternary ammonium salt modified nano-zinc oxide is prepared from an aqueous ethanol solution, nano-zinc oxide, γ-methacryloyloxypropyltrimethoxysilane, an aqueous solution of hexadecyl dimethyl allyl ammonium chloride, and ammonium persulfate. The crosslinking agent is prepared from hydroxyl silicone oil, isophorone diisocyanate, dibutyltin dilaurate catalyst, and methanol.

[0006] Furthermore, the mass ratio of hydroxyl silicone oil, isophorone diisocyanate, dibutyltin dilaurate catalyst, and methanol is 100:18.5-19.0:0.05-0.10:1.6-1.7.

[0007] Furthermore, the mass ratio of the aqueous ethanol solution, nano zinc oxide, γ-methacryloxypropyltrimethoxysilane, hexadecyl dimethyl allyl ammonium chloride solution, and ammonium persulfate is 100:4-6:1-2:8-12:0.1-0.3.

[0008] Furthermore, the mass ratio of deionized water, crosslinking agent, nano silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano zinc oxide, and ammonium persulfate aqueous solution is 200:2-4:4-6:7-9:5-10:3-4:3-4:3-5:1-3.

[0009] A method for preparing a multifunctional composite acrylic fabric includes the following steps: (1) Under nitrogen protection, hydroxyl silicone oil is added to a sealed reactor. Isophorone diisocyanate is slowly added dropwise over 30-40 minutes at 70-75℃ and 200-300 rpm. After the addition is complete, dibutyltin dilaurate catalyst is added. The temperature is raised to 80-85℃ and stirring is continued for 2.5-3.0 hours. Then, methanol is slowly added dropwise over 20-30 minutes at 50-60℃ and 150-200 rpm. Stirring is continued at 55-60℃ for 1.5-2.0 hours. Finally, the crosslinking agent is obtained by vacuum distillation for 1.0-1.5 hours at 40-50℃ and a vacuum degree of -0.093--0.095 MPa. (2) Add 70-80% ethanol aqueous solution and nano zinc oxide to the reaction vessel, and ultrasonically disperse for 20-30 minutes at a power of 300-400W. Add γ-methacryloxypropyltrimethoxysilane and stir at 65-70℃ and 400-500rpm for 4.0-5.0 hours. Then, slowly add hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate simultaneously over 15-20 minutes. After the addition is complete, continue stirring at 70-75℃ for 3.0-4.0 hours. Centrifuge and wash the precipitate 2-4 times with 94-96% ethanol aqueous solution. Vacuum dry at 70-75℃ for 6-8 hours to obtain quaternary ammonium salt modified nano zinc oxide. (3) Immerse the acrylic fabric in a sodium hydroxide aqueous solution with a mass fraction of 4-6% and a bath ratio of 1:20-30. Treat it at 70-75℃ for 20-30 minutes. After treatment, wash it with deionized water at 40-50℃ until neutral. Then dry it at 80-85℃ for 45-60 minutes to obtain activated acrylic fabric. (4) Mix deionized water and crosslinking agent, stir at 2000-2500 rpm for 5-10 minutes, then add nano silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether and quaternary ammonium salt modified nano zinc oxide, stir at 4000-5000 rpm for 30-40 minutes, and then slowly add ammonium persulfate aqueous solution dropwise over 15-20 minutes under stirring speed of 300-400 rpm to obtain finishing solution; (5) The activated acrylic fabric is immersed in the finishing solution at a ratio of 1:18-20. After immersion at 25-30°C for 5-8 minutes, it is rolled at a rolling pressure of 0.6-0.7MPa to achieve a liquid retention rate of 75-85%. The immersion is then repeated once. The rolled fabric is then pre-dried at 80-90°C for 5-8 minutes and then baked and cured at 150-160°C for 3-4 minutes. After cooling, a multifunctional composite acrylic fabric is obtained.

[0010] Furthermore, the number-average molecular weight of the hydroxyl silicone oil in step (1) is 1900-2100 g / mol.

[0011] Furthermore, in step (2), the particle size of the nano zinc oxide is 40-60 nm.

[0012] Furthermore, in step (2), the mass fraction of the hexadecyl dimethyl allyl ammonium chloride aqueous solution is 45-55%.

[0013] Furthermore, in step (4), the mass fraction of the ammonium persulfate aqueous solution is 9-11%.

[0014] Furthermore, in step (4), the particle size of the nano-silica is 20-30 nm.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. In this invention, the isocyanate group on the isophorone diisocyanate molecule and the hydroxyl group on the hydroxyl silicone oil molecule undergo stepwise addition polymerization catalyzed by dibutyltin dilaurate. Subsequently, the isocyanate group is capped by the hydroxyl group of the methanol molecule, thereby preparing a crosslinking agent containing flexible polysiloxane chains, urethane bonds, and methoxy groups. The hydroxyl groups on the surface of nano zinc oxide undergo a hydrolytic condensation reaction with the methoxy group of γ-methacryloyloxypropyltrimethoxysilane molecule, and the γ-methacryloyloxypropyltrimethoxysilane is co- Quaternary ammonium salts are grafted onto the surface of nano-zinc oxide via valence bonds. The methacryloyloxy group on the surface of the nano-zinc oxide reacts with the allyl group in the hexadecyl dimethyl allyl ammonium chloride molecule via a free radical grafting copolymerization reaction initiated by ammonium persulfate, thereby covalently grafting the quaternary ammonium salt onto the surface of the nano-zinc oxide to obtain quaternary ammonium salt-modified nano-zinc oxide. Alkali treatment of acrylic fabric hydrolyzes the cyano groups on its surface into carboxyl and amide groups to enhance reactivity. During baking, the active groups such as urethane and urea ester bonds in the crosslinking agent... The groups may react with carboxyl and amide groups generated by hydrolysis on the surface of acrylic fabrics to form strong chemical bonds; simultaneously, the crosslinking agent molecular chains form a network structure through hydrogen bonds and physical entanglement; the silanol groups on the surface of nano-silica undergo condensation reactions with each other and with other components in the finishing solution, such as the silanol groups on the KH570 modified layer, thereby embedding into the polysiloxane network as a reinforcing filler; the silane layer on the surface of quaternary ammonium salt modified nano-zinc oxide is bonded to the polysiloxane network through silanol condensation or physical interpenetration; perfluorohexyl Ethyl acrylate and butyl acrylate are polymerized under the initiation of free radicals generated by the decomposition of ammonium persulfate, and their low surface energy fluorocarbon segments are enriched on the coating surface; hydrogen bonds are formed between the urethane bonds of the polysiloxane network and the carboxyl and amide groups generated by hydrolysis on the surface of the acrylic fabric; finally, nano-silica provides rigid support points, thereby improving the abrasion resistance of the fabric; the fluorocarbon segments enriched on the fabric surface and the polysiloxane network synergistically construct a hydrophobic layer, thereby giving the fabric waterproof properties; quaternary ammonium salt and zinc ions of nano-zinc oxide produce a synergistic antibacterial effect. Detailed Implementation

[0016] The following embodiments are provided to better understand the present invention and are not limited to the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention.

[0017] A multifunctional composite acrylic fabric is obtained by sequentially treating acrylic fabric with an aqueous sodium hydroxide solution and a finishing solution. The finishing solution is prepared from deionized water, a crosslinking agent, nano-silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano-zinc oxide, and an aqueous solution of ammonium persulfate. The quaternary ammonium salt modified nano-zinc oxide is prepared from an aqueous ethanol solution, nano-zinc oxide, γ-methacryloyloxypropyltrimethoxysilane, an aqueous solution of hexadecyl dimethyl allyl ammonium chloride, and ammonium persulfate. The crosslinking agent is prepared from hydroxyl silicone oil, isophorone diisocyanate, dibutyltin dilaurate catalyst, and methanol.

[0018] For experiments not specifically described in the examples, the procedures and conditions should be followed according to the conventional experimental procedures described in the literature in this field. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products. The number average molecular weight of polyvinylpyrrolidone is 50,000 g / mol.

[0019] Example 1:

[0020] (1) Under nitrogen protection, hydroxyl silicone oil was added to a sealed reactor. Isophorone diisocyanate was slowly added dropwise over 30 minutes at 70°C and 200 rpm. After the addition was complete, dibutyltin dilaurate catalyst was added. The temperature was raised to 80°C and stirring was continued for 2.5 hours. Then, methanol was slowly added dropwise over 20 minutes at 50°C and 150 rpm. Stirring was continued at 55°C for 1.5 hours. Finally, the crosslinking agent was obtained by vacuum distillation for 1.0 hour at 40°C and a vacuum degree of -0.093 MPa. The number average molecular weight of the hydroxyl silicone oil was 1900 g / mol. The mass ratio of hydroxyl silicone oil, isophorone diisocyanate, dibutyltin dilaurate catalyst and methanol was 100:18.5:0.05:1.6.

[0021] (2) Add a 70% ethanol aqueous solution and 40nm nano zinc oxide to the reactor, and ultrasonically disperse for 20 minutes at 300W. Add γ-methacryloxypropyltrimethoxysilane and stir at 65℃ and 400rpm for 4.0 hours. Then slowly add a 45% hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate over 15 minutes. After the addition is complete, continue stirring at 70℃ for 3.0 hours. Centrifuge and wash the precipitate twice with a 94% ethanol aqueous solution. Vacuum dry at 70℃ for 6 hours to obtain quaternary ammonium salt modified nano zinc oxide. The mass ratio of ethanol aqueous solution, nano zinc oxide, γ-methacryloxypropyltrimethoxysilane, hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate is 100:4:1:8:0.1.

[0022] (3) Immerse an acrylic fabric with a weight of 180 g / m² in a sodium hydroxide aqueous solution with a mass fraction of 4% at a bath ratio of 1:20, treat it at 70°C for 20 minutes, wash it with deionized water at 40°C until neutral, and then dry it at 80°C for 45 minutes to obtain activated acrylic fabric. (4) Mix deionized water and crosslinking agent, stir at 2000 rpm for 5 minutes, then add nano-silica with a particle size of 20 nm, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, and quaternary ammonium salt modified nano-zinc oxide, stir at 4000 rpm for 30 minutes, and then slowly add 9% ammonium persulfate aqueous solution over 15 minutes at a stirring speed of 300 rpm to obtain the finishing solution; wherein the mass ratio of deionized water, crosslinking agent, nano-silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano-zinc oxide, and ammonium persulfate aqueous solution is 200:2:4:7:5:3:3:3:1.

[0023] (5) The activated acrylic fabric is immersed in the finishing solution with a bath ratio of 1:18. After immersion at 25°C for 5 minutes, it is rolled at a rolling pressure of 0.6 MPa to achieve a liquid retention rate of 75%. The immersion is then repeated once. The rolled fabric is then pre-dried at 80°C for 5 minutes and then baked and cured at 150°C for 3 minutes. After cooling, a multifunctional composite acrylic fabric is obtained.

[0024] Example 2:

[0025] (1) Under nitrogen protection, hydroxyl silicone oil was added to a sealed reactor. Isophorone diisocyanate was slowly added dropwise over 35 minutes at 72.5°C and 250 rpm. After the addition was complete, dibutyltin dilaurate catalyst was added. The temperature was raised to 82.5°C and stirring was continued for 2.7 hours. Then, methanol was slowly added dropwise over 25 minutes at 55°C and 175 rpm. Stirring was continued at 57.5°C for 1.75 hours. Finally, the crosslinking agent was obtained by vacuum distillation for 1.2 hours at 45°C and a vacuum degree of -0.094 MPa. The number average molecular weight of the hydroxyl silicone oil was 2000 g / mol. The mass ratio of hydroxyl silicone oil, isophorone diisocyanate, dibutyltin dilaurate catalyst and methanol was 100:18.75:0.075:1.65.

[0026] (2) Add a 75% ethanol aqueous solution and 50nm nano zinc oxide to the reactor, and disperse it ultrasonically at 350W for 25 minutes. Add γ-methacryloxypropyltrimethoxysilane and stir at 67.5℃ and 450rpm for 4.5 hours. Then slowly add a 50% hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate over 17.5 minutes. After the addition is complete, continue stirring at 72.5℃ for 3.5 hours. Centrifuge and wash the precipitate three times with a 95% ethanol aqueous solution. Vacuum dry at 72.5℃ for 7 hours to obtain quaternary ammonium salt modified nano zinc oxide. The mass ratio of ethanol aqueous solution, nano zinc oxide, γ-methacryloxypropyltrimethoxysilane, hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate is 100:5:1.5:10:0.2.

[0027] (3) Immerse an acrylic fabric with a weight of 180 g / m² in a 5% sodium hydroxide aqueous solution with a bath ratio of 1:25, treat it at 72.5°C for 25 minutes, wash it with deionized water at 45°C until neutral, and then dry it at 82.5°C for 52.5 minutes to obtain activated acrylic fabric. (4) Mix deionized water and crosslinking agent, stir at 2250 rpm for 7.5 minutes, then add nano-silica with a particle size of 25 nm, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, and quaternary ammonium salt modified nano-zinc oxide, stir at 4500 rpm for 35 minutes, and then slowly add 10% ammonium persulfate aqueous solution over 17.5 minutes at a stirring speed of 350 rpm to obtain the finishing solution; wherein the mass ratio of deionized water, crosslinking agent, nano-silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano-zinc oxide, and ammonium persulfate aqueous solution is 200:3:5:8:7.5:3.5:3.5:4:2.

[0028] (5) The activated acrylic fabric is immersed in the finishing solution with a bath ratio of 1:19. After immersion at 27.5°C for 6.5 minutes, it is rolled at a rolling pressure of 0.65 MPa to achieve a liquid retention rate of 80%. The immersion is then repeated once. The rolled fabric is then pre-dried at 85°C for 6.5 minutes and then baked and cured at 155°C for 3.5 minutes. After cooling, a multifunctional composite acrylic fabric is obtained.

[0029] Example 3:

[0030] (1) Under nitrogen protection, hydroxyl silicone oil was added to a sealed reactor. Isophorone diisocyanate was slowly added dropwise over 40 minutes at 75°C and 300 rpm. After the addition was complete, dibutyltin dilaurate catalyst was added. The temperature was raised to 85°C and stirring was continued for 3.0 hours. Then, methanol was slowly added dropwise over 30 minutes at 60°C and 200 rpm. Stirring was continued at 60°C for 2.0 hours. Finally, the crosslinking agent was obtained by vacuum distillation for 1.5 hours at 50°C and a vacuum degree of -0.095 MPa. The number average molecular weight of the hydroxyl silicone oil was 2100 g / mol. The mass ratio of hydroxyl silicone oil, isophorone diisocyanate, dibutyltin dilaurate catalyst and methanol was 100:19.0:0.10:1.7.

[0031] (2) Add an 80% ethanol aqueous solution and 60nm nano zinc oxide to the reactor and disperse it ultrasonically at 400W for 30 minutes. Add γ-methacryloxypropyltrimethoxysilane and stir at 70℃ and 500rpm for 5.0 hours. Then slowly add a 55% hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate over 20 minutes. After the addition is complete, continue stirring at 75℃ for 4.0 hours. Centrifuge and wash the precipitate 4 times with a 96% ethanol aqueous solution. Vacuum dry at 75℃ for 8 hours to obtain quaternary ammonium salt modified nano zinc oxide. The mass ratio of ethanol aqueous solution, nano zinc oxide, γ-methacryloxypropyltrimethoxysilane, hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate is 100:6:2:12:0.3.

[0032] (3) Immerse an acrylic fabric with a weight of 180 g / m² in a 6% sodium hydroxide aqueous solution with a bath ratio of 1:30, treat it at 75°C for 30 minutes, wash it with deionized water at 50°C until neutral, and then dry it at 85°C for 60 minutes to obtain activated acrylic fabric. (4) Mix deionized water and crosslinking agent, stir at 2500 rpm for 10 minutes, then add nano-silica with a particle size of 30 nm, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, and quaternary ammonium salt modified nano-zinc oxide, stir at 5000 rpm for 40 minutes, and then slowly add 11% ammonium persulfate aqueous solution over 20 minutes at a stirring speed of 400 rpm to obtain the finishing solution; wherein the mass ratio of deionized water, crosslinking agent, nano-silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano-zinc oxide, and ammonium persulfate aqueous solution is 200:4:6:9:10:4:4:5:3.

[0033] (5) The activated acrylic fabric is immersed in the finishing solution with a bath ratio of 1:20. After immersion at 30°C for 8 minutes, it is rolled at a rolling pressure of 0.7 MPa to achieve a liquid retention rate of 85%. The immersion is then repeated once. The rolled fabric is then pre-dried at 90°C for 8 minutes and then baked and cured at 160°C for 4 minutes. After cooling, a multifunctional composite acrylic fabric is obtained.

[0034] Comparative Example 1 The only difference between Comparative Example 1 and Example 1 is that step (3) is omitted.

[0035] Comparative Example 2 The only difference between Comparative Example 2 and Example 1 is that no crosslinking agent is added.

[0036] Comparative Example 3 The only difference between Comparative Example 3 and Example 1 is that nano-silica is not added.

[0037] Comparative Example 4 The only difference between Comparative Example 4 and Example 1 is that perfluorohexyl ethyl acrylate is not added.

[0038] Abrasion resistance: Tested according to standard GB / T21196.2-2007.

[0039] Waterproof performance: Tested in accordance with standard GB / T40910-2021.

[0040] Antibacterial properties: Tested in accordance with standard GB / T20944.3-2008.

[0041] Wash resistance: Perform 50 standard washes according to GB / T8629-2017, and then test antibacterial performance.

[0042] Table 1 below shows the performance analysis results of the embodiments and comparative examples of the present invention.

[0043] Table 1

[0044] Experimental data from the examples and comparative examples show that the present invention uses nano-silica as a wear-resistant reinforcing filler, perfluorohexyl ethyl acrylate as a waterproof functional monomer, and quaternary ammonium salt modified nano-zinc oxide as an antibacterial agent. During the baking process, active groups such as urethane bonds and urea-formaldehyde bonds in the crosslinking agent may react with carboxyl and amide groups generated by hydrolysis on the surface of acrylic fabric to form strong chemical bonds. At the same time, the molecular chains of the crosslinking agent form a network structure through hydrogen bonds and physical entanglement. The silanol groups on the surface of nano-silica undergo condensation reactions with each other and with other components in the finishing solution, such as the silanol groups on the KH570 modified layer, thereby embedding polysiloxane. The network serves as a reinforcing filler; the silane layer on the surface of the quaternary ammonium salt-modified nano zinc oxide is bonded to the polysiloxane network through silanol condensation or physical interpenetration; perfluorohexyl ethyl acrylate and butyl acrylate are polymerized under the initiation of free radicals generated by the decomposition of ammonium persulfate, and their low surface energy fluorocarbon segments are enriched on the coating surface; the urethane bonds of the polysiloxane network form hydrogen bonds with the carboxyl and amide groups generated by hydrolysis on the surface of the acrylic fabric; finally, nano silica provides rigid support points, thereby improving the abrasion resistance of the fabric; the fluorocarbon segments enriched on the fabric surface and the polysiloxane network synergistically construct a hydrophobic layer, thereby giving the fabric waterproof properties; the quaternary ammonium salt and the zinc ions of nano zinc oxide produce a synergistic antibacterial effect.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. A multifunctional composite acrylic fabric, characterized in that, The multifunctional composite acrylic fabric is obtained by sequentially treating acrylic fabric with sodium hydroxide aqueous solution and finishing solution; the finishing solution is prepared by deionized water, crosslinking agent, nano silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano zinc oxide and ammonium persulfate aqueous solution; the quaternary ammonium salt modified nano zinc oxide is prepared by ethanol aqueous solution, nano zinc oxide, γ-methacryloyloxypropyltrimethoxysilane, hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate; the crosslinking agent is prepared by hydroxyl silicone oil, isophorone diisocyanate, dibutyltin dilaurate catalyst and methanol.

2. The multifunctional composite acrylic fabric according to claim 1, characterized in that: The mass ratio of hydroxyl silicone oil, isophorone diisocyanate, dibutyltin dilaurate catalyst, and methanol is 100:18.5-19.0:0.05-0.10:1.6-1.

7.

3. The multifunctional composite acrylic fabric according to claim 2, characterized in that: The mass ratio of aqueous ethanol solution, nano zinc oxide, γ-methacryloxypropyltrimethoxysilane, hexadecyl dimethyl allyl ammonium chloride solution and ammonium persulfate is 100:4-6:1-2:8-12:0.1-0.

3.

4. The multifunctional composite acrylic fabric according to claim 3, characterized in that: The mass ratio of deionized water, crosslinking agent, nano silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether, quaternary ammonium salt modified nano zinc oxide, and ammonium persulfate aqueous solution is 200:2-4:4-6:7-9:5-10:3-4:3-4:3-5:1-3.

5. A method for preparing a multifunctional composite acrylic fabric, applied to the multifunctional composite acrylic fabric according to any one of claims 1-4, characterized in that, Includes the following steps: (1) Under nitrogen protection, hydroxyl silicone oil is added to a sealed reactor. Isophorone diisocyanate is slowly added dropwise over 30-40 minutes at 70-75℃ and 200-300 rpm. After the addition is complete, dibutyltin dilaurate catalyst is added. The temperature is raised to 80-85℃ and stirring is continued for 2.5-3.0 hours. Then, methanol is slowly added dropwise over 20-30 minutes at 50-60℃ and 150-200 rpm. Stirring is continued at 55-60℃ for 1.5-2.0 hours. Finally, the crosslinking agent is obtained by vacuum distillation for 1.0-1.5 hours at 40-50℃ and a vacuum degree of -0.093--0.095 MPa. (2) Add 70-80% ethanol aqueous solution and nano zinc oxide to the reaction vessel, and ultrasonically disperse for 20-30 minutes at a power of 300-400W. Add γ-methacryloxypropyltrimethoxysilane and stir at 65-70℃ and 400-500rpm for 4.0-5.0 hours. Then, slowly add hexadecyl dimethyl allyl ammonium chloride aqueous solution and ammonium persulfate simultaneously over 15-20 minutes. After the addition is complete, continue stirring at 70-75℃ for 3.0-4.0 hours. Centrifuge and wash the precipitate 2-4 times with 94-96% ethanol aqueous solution. Vacuum dry at 70-75℃ for 6-8 hours to obtain quaternary ammonium salt modified nano zinc oxide. (3) Immerse the acrylic fabric in a sodium hydroxide aqueous solution with a mass fraction of 4-6% and a bath ratio of 1:20-30. Treat it at 70-75℃ for 20-30 minutes. After treatment, wash it with deionized water at 40-50℃ until neutral. Then dry it at 80-85℃ for 45-60 minutes to obtain activated acrylic fabric. (4) Mix deionized water and crosslinking agent, stir at 2000-2500 rpm for 5-10 minutes, then add nano silica, perfluorohexyl ethyl acrylate, butyl acrylate, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether and quaternary ammonium salt modified nano zinc oxide, stir at 4000-5000 rpm for 30-40 minutes, and then slowly add ammonium persulfate aqueous solution dropwise over 15-20 minutes under stirring speed of 300-400 rpm to obtain finishing solution; (5) The activated acrylic fabric is immersed in the finishing solution at a ratio of 1:18-20. After immersion at 25-30°C for 5-8 minutes, it is rolled at a rolling pressure of 0.6-0.7MPa to achieve a liquid retention rate of 75-85%. The immersion is then repeated once. The rolled fabric is then pre-dried at 80-90°C for 5-8 minutes and then baked and cured at 150-160°C for 3-4 minutes. After cooling, a multifunctional composite acrylic fabric is obtained.

6. The method for preparing a multifunctional composite acrylic fabric according to claim 5, characterized in that: The number-average molecular weight of the hydroxyl silicone oil in step (1) is 1900-2100 g / mol.

7. The method for preparing a multifunctional composite acrylic fabric according to claim 5, characterized in that: In step (2), the particle size of the nano zinc oxide is 40-60 nm.

8. The method for preparing a multifunctional composite acrylic fabric according to claim 5, characterized in that: In step (2), the mass fraction of the hexadecyl dimethyl allyl ammonium chloride aqueous solution is 45-55%.

9. The method for preparing a multifunctional composite acrylic fabric according to claim 5, characterized in that: In step (4), the mass fraction of the ammonium persulfate aqueous solution is 9-11%.

10. The method for preparing a multifunctional composite acrylic fabric according to claim 5, characterized in that: In step (4), the particle size of nano-silica is 20-30 nm.

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