Long-acting mosquito-repellent slow-release composition for textiles and preparation method thereof

Abstract

The invention belongs to the field of material chemical industry, and discloses a long-acting mosquito-repellent slow-release composition for textiles and a preparation method of the long-acting mosquito-repellent slow-release composition, and stable loading and long-acting slow release are realized by utilizing groups such as amino groups, hydroxyl groups and ester groups in a compound to react or interact with N, N-diethyl-2-hydroxy-2-phenylacetamide and textile fibers. The compounds are synthesized from common raw materials through esterification, condensation and other reactions. A contrast test shows that the residual amount of N, N-diethyl-2-hydroxy-2-phenylacetamide of the modified slow-release agent on textiles is remarkably increased, the mosquito repelling, antibacterial, anti-ultraviolet and self-repairing properties and the like are greatly improved compared with those in the prior art, and the modified slow-release agent has a good application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of chemical materials, and in particular to a long-acting mosquito repellent slow-release composition for textiles and a preparation method thereof. Background Art

[0002] As people's living standards continue to improve, the functional requirements for textiles are becoming more diversified and high-standard. N,N-diethyl-2-hydroxy-2-phenylacetamide has become an ideal additive to increase the added value of textiles because of its many practical functions such as mosquito repellent, antibacterial, and UV resistance. When applied to textiles, it can give textiles the ability to resist external invasion and protect human health, such as effectively reducing bacterial growth and reducing UV damage to the skin. However, in practical applications, the poor adhesion of N,N-diethyl-2-hydroxy-2-phenylacetamide on textiles has become a major problem. During daily wear, slight friction, washing and other behaviors can easily cause the substance to fall off the surface of the textile, greatly shortening its effective action time. At the same time, its slow-release effect is not good, which makes the substance release quickly in a short time, and the subsequent functions are difficult to continue. This problem is particularly prominent in terms of mosquito repellent function. N,N-diethyl-2-hydroxy-2-phenylacetamide could form a protective barrier around the human body through continuous release to repel mosquitoes. However, due to defects in adhesion and sustained-release properties, the mosquito repellent effect of textiles is greatly weakened or even disappears after several washes or short-term wearing. Consumers often cannot get continuous and effective protection against mosquitoes when they are outdoors, which is far from their expectations for high performance and long life of textiles. In addition, existing technical means have limited effectiveness in solving these problems. Traditional loading methods make it difficult to ensure that the substance is evenly and firmly attached to textiles, and ordinary sustained-release systems cannot accurately control its release rate. These deficiencies have severely limited the widespread application and development of N,N-diethyl-2-hydroxy-2-phenylacetamide in the field of textiles. An innovative technology is urgently needed to solve these problems in order to meet the market demand for functional textiles. Summary of the invention

[0003] The invention provides a long-acting mosquito repellent slow-release composition for textiles, which comprises, by weight, 5-15 parts of N,N-diethyl-2-hydroxy-2-phenylacetamide, 10-20 parts of nanoporous materials, 3-8 parts of viscosity enhancers, 8-15 parts of pH-responsive microcapsule wall material polymers, 0.5-2 parts of antioxidants, 0.5-2 parts of light stabilizers, 1-5 parts of softeners, 2-6 parts of cross-linking agents, 0.1-1 parts of catalysts, 0.1-1 parts of nanosilver, 2-8 parts of self-repairing materials, and the balance of water or biodegradable organic solvents.

[0004] Furthermore, the nanoporous material is a nano-silicon dioxide porous material, the average pore diameter of which is 20-50 nanometers and the specific surface area is 500-800 square meters per gram.

[0005] Furthermore, the viscosity enhancer is a copolymer containing hydroxyl, carboxyl and amino groups; the long-acting mosquito repellent sustained-release composition also includes synthetic modified organic compounds 4-aminobenzoic acid-3-methoxyphenyl ester, 2-hydroxy-5-methylbenzaldehyde thiosemicarbazone, 3-methoxyethyl mercaptopropionate, and 4-nitro-2-chlorobenzoic acid-N,N-dimethylaminoethyl ester.

[0006] Furthermore, the pH responsive microcapsule wall material polymer is copolymerized with one or more of acrylic acid, methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, isopentyl methacrylate, and cyclohexyl methacrylate.

[0007] On the other hand, the present invention also provides a method for preparing a textile having a long-lasting mosquito repellent slow-release function, comprising the following steps:

[0008] Preparation of nanoporous material: TEOS, ethanol, water and hydrochloric acid are mixed and stirred to form a sol, the sol is aged to obtain a gel, and the gel is dried and calcined to obtain a nano-silica porous material;

[0009] Preparation of pH-responsive microcapsules: dissolving N,N-diethyl-2-hydroxy-2-phenylacetamide in dichloromethane, adding the solution to an aqueous solution containing a pH-responsive microcapsule wall material polymer, stirring at high speed to form an emulsion, and adding a crosslinking agent to react to prepare pH-responsive microcapsules;

[0010] Preparation of finishing agent: adding nanoporous material, tackifier, antioxidant, light stabilizer, softener, crosslinking agent, catalyst, nanosilver, and self-repairing material to water or a biodegradable organic solvent in the proportions described in claim 1, and stirring to obtain a finishing agent solution;

[0011] Ultrasonic assisted loading: The textile is immersed in the finishing agent solution, and the finishing agent is evenly loaded onto the textile under the action of ultrasound;

[0012] Low-temperature cross-linking and curing: The loaded textiles are cross-linked and cured at 60-80°C to form a chemical bond between the finishing agent and the textile fibers;

[0013] Post-processing: cleaning, drying and other post-processing of the cured textiles.

[0014] Furthermore, in the method described above, in the ultrasonic-assisted loading step, the ultrasonic power is 180-300 watts and the processing time is 25-45 minutes.

[0015] Furthermore, in the method described above, in the low-temperature cross-linking and curing step, the cross-linking agent is a multifunctional epoxy cross-linking agent, and the catalyst is an organic tin catalyst.

[0016] The present invention also provides the use of the long-acting mosquito repellent slow-release composition in the preparation of textiles with antibacterial and anti-ultraviolet functions.

[0017] The present invention also provides a textile with a long-lasting mosquito repellent and slow-release function prepared by the method.

[0018] The present invention also provides a method for improving the performance of textiles, using any of the long-acting mosquito repellent sustained-release compositions described in one item to treat the textiles, so that the textiles have antibacterial, UV resistance, self-repairing and other properties, and N,N-diethyl-2-hydroxy-2-phenylacetamide achieves long-acting mosquito repellent sustained-release on the textiles.

[0019] Beneficial technical effects:

[0020] The present invention focuses on improving the performance of N, N-diethyl-2-hydroxy-2-phenylacetamide in textiles. In terms of material selection, a new type of nanoporous material is used as a carrier, which has a large specific surface area, rich pore structure and controllable pore size. Compared with ordinary carriers, it can significantly increase the residual amount of the substance after 10 washes to more than 60%. At the same time, a self-developed viscosity enhancer is added to interact with the fiber and the substance. In addition, the substance is wrapped with a pH-responsive microcapsule wall material polymer to accurately control its release under different pH environments. In the formula design, a variety of functional additives are added. 0.5-2 parts of antioxidants prevent its oxidative failure, 0.5-2 parts of light stabilizers enhance the anti-ultraviolet performance, and 1-5 parts of softeners improve the feel, synergistically improving the comprehensive performance of textiles. In terms of preparation technology, a low-temperature cross-linking and curing process is used, and cross-linking can be achieved at 60-80°C, the loss rate of effective ingredients is controlled within 5%, and energy consumption is reduced by about 30%. The ultrasonic assisted loading technology is introduced to increase the loading capacity from 60% of the theoretical value to more than 90%. A gradient concentration distribution is formed through a special process to extend the duration of the function. 2-8 parts of self-repairing materials are added to maintain the fiber structure and sustained-release performance. A nano-silver synergistic antibacterial system is constructed to improve the antibacterial rate. The preparation process uses green and environmentally friendly raw materials, such as water or biodegradable organic solvents, avoids heavy metals, reduces energy consumption and waste emissions, and has good environmental benefits. DETAILED DESCRIPTION

[0021] Example 1

[0022] Preparation of nanoporous material: 100 parts of tetraethyl orthosilicate, 200 parts of ethanol, 50 parts of water and 5 parts of hydrochloric acid were mixed by weight, and reacted for 3 hours under stirring to form a sol. The sol was aged at 60°C for 24 hours to obtain a gel. The gel was then dried at 100°C for 12 hours and then calcined at 500°C for 3 hours to obtain a nano-silica porous material.

[0023] Preparation of pH-responsive microcapsules: 10 parts of N,N-diethyl-2-hydroxy-2-phenylacetamide were dissolved in 50 parts of dichloromethane, added to 200 parts of aqueous solution containing 15 parts of pH-responsive microcapsule wall material polymer (copolymerized by acrylic acid and methyl methacrylate), and formed an emulsion by high-speed stirring. Then, crosslinking agent glutaraldehyde was added and reacted at 40°C for 4 hours to prepare pH-responsive microcapsules.

[0024] Preparation of the finishing agent: add 15 parts of nano-silica porous material, 5 parts of tackifier (copolymer containing hydroxyl, carboxyl and amino groups), 1 part of antioxidant (hindered phenol antioxidant), 1 part of light stabilizer (benzotriazole light stabilizer), 3 parts of softener (organic silicone softener), 4 parts of cross-linking agent (multifunctional epoxy cross-linking agent), 0.5 parts of catalyst (organic tin catalyst), 0.5 parts of nano-silver (particle size of 20 nanometers), and 5 parts of self-healing material (polymer containing disulfide bonds) into 500 parts of water, stir evenly, and obtain a finishing agent solution.

[0025] Ultrasonic-assisted loading: 100 parts of pure cotton textiles were immersed in the finishing agent solution and treated under the action of 200 watts of ultrasound for 30 minutes to evenly load N,N-diethyl-2-hydroxy-2-phenylacetamide and other components onto the textiles.

[0026] Low-temperature cross-linking and curing: The loaded textile is cross-linked and cured at 70°C for 2 hours to form a chemical bond between the finishing agent and the textile fibers, fixing N,N-diethyl-2-hydroxy-2-phenylacetamide and other components.

[0027] Post-treatment: The cured textiles are cleaned, dried and other post-treatments are performed to remove impurities remaining on the surface to obtain textiles with long-lasting mosquito repellent and slow-release functions.

[0028] Comparative test: take pure cotton textiles of the same quality and specifications, and use the existing conventional padding method to load N, N-diethyl-2-hydroxy-2-phenylacetamide onto the textiles, without using the special components and processes such as the nanoporous material, pH-responsive microcapsules, and thickeners of the present invention. After 10 standard washes, the residual amount of N, N-diethyl-2-hydroxy-2-phenylacetamide on the textiles treated by the present invention is 65% of the initial load, while the control group is only 20%. In the antibacterial test, the antibacterial rates of the textiles treated by the present invention against Escherichia coli and Staphylococcus aureus are still as high as 90% and 85% respectively after washing 10 times, while the control group drops to 60% and 50%. In the anti-ultraviolet performance test, the ultraviolet protection factor (UPF) of the textiles treated by the present invention remains above 35 after long-term illumination, while the control group drops to below 15.

[0029] Example 2

[0030] Preparation of nanoporous material: 120 parts of tetraethyl orthosilicate, 250 parts of ethanol, 60 parts of water and 6 parts of hydrochloric acid were mixed and reacted for 4 hours under stirring to form a sol. The sol was aged at 70°C for 36 hours to obtain a gel. The gel was then dried at 120°C for 15 hours and then calcined at 550°C for 4 hours to obtain a nano-silica porous material.

[0031] Preparation of pH-responsive microcapsules: 12 parts of N,N-diethyl-2-hydroxy-2-phenylacetamide were dissolved in 60 parts of dichloromethane, added to 250 parts of aqueous solution containing 18 parts of pH-responsive microcapsule wall material polymer (copolymerized by acrylic acid and ethyl methacrylate), and formed an emulsion by high-speed stirring. Then, a crosslinking agent, adipaldehyde, was added and reacted at 45°C for 5 hours to prepare pH-responsive microcapsules.

[0032] Preparation of the finishing agent: 18 parts of nano-silica porous material, 6 parts of tackifier (copolymer containing hydroxyl, carboxyl and amino groups), 1.5 parts of antioxidant (hindered phenol antioxidant), 1.5 parts of light stabilizer (benzotriazole light stabilizer), 4 parts of softener (organic silicone softener), 5 parts of cross-linking agent (multifunctional epoxy cross-linking agent), 0.8 parts of catalyst (organic tin catalyst), 0.8 parts of nano-silver (particle size of 30 nanometers), 6 parts of self-healing material (polymer containing hydrogen bonds) are added to 600 parts of water, stirred evenly, to obtain a finishing agent solution.

[0033] Ultrasonic-assisted loading: 120 parts of pure wool textiles were immersed in the finishing agent solution and treated under the action of 250 watts of ultrasound for 40 minutes to evenly load N,N-diethyl-2-hydroxy-2-phenylacetamide and other components onto the textiles.

[0034] Low-temperature cross-linking and curing: The loaded textiles are cross-linked and cured at 75°C for 2.5 hours to form chemical bonds between the finishing agent and the textile fibers and to fix N,N-diethyl-2-hydroxy-2-phenylacetamide and other components.

[0035] Post-treatment: The cured textiles are cleaned, dried and other post-treatments are performed to remove impurities remaining on the surface to obtain textiles with long-lasting mosquito repellent and slow-release functions.

[0036] Comparative test: Take the same pure wool textiles, use the existing simple soaking-drying method to treat N,N-diethyl-2-hydroxy-2-phenylacetamide on the textiles, and do not use the innovative process and formula of the present invention. After 15 washes, the textiles treated with the present invention can still maintain a good feel, with a softness score of more than 7 points (out of 10 points), while the control group is only 4 points. In the self-repair performance test, the two groups of textiles were subjected to simulated wear. The textiles treated with the present invention showed obvious signs of repair at the fiber damage within 24 hours, while the control group had almost no repair. In terms of sustained-release performance testing, after the textiles treated with the present invention were washed 15 times, the release of N,N-diethyl-2-hydroxy-2-phenylacetamide can still be maintained at about 40% of the initial load, while the control group is only 15%.

[0037] Example 3

[0038] Preparation of nanoporous material: 80 g of tetraethyl orthosilicate, 180 g of ethanol, 40 g of water and 4 g of hydrochloric acid were mixed and reacted for 2.5 hours under stirring to form a sol. The sol was aged at 55°C for 20 hours to obtain a gel. The gel was then dried at 90°C for 10 hours and then calcined at 480°C for 2.5 hours to obtain a nano-silica porous material.

[0039] Preparation of pH-responsive microcapsules: 8 g of N,N-diethyl-2-hydroxy-2-phenylacetamide was dissolved in 40 ml of dichloromethane, added to 180 ml of aqueous solution containing 12 g of pH-responsive microcapsule wall material polymer (copolymerized by acrylic acid and butyl methacrylate), and an emulsion was formed by high-speed stirring. Then, a crosslinking agent, suberaldehyde, was added and reacted at 38°C for 3.5 hours to prepare pH-responsive microcapsules.

[0040] Preparation of the finishing agent: by weight, add 12 parts of nano-silica porous material, 4 parts of tackifier (copolymer containing hydroxyl, carboxyl and amino groups), 0.8 parts of antioxidant (hindered phenol antioxidant), 0.8 parts of light stabilizer (benzotriazole light stabilizer), 2 parts of softener (organic silicone softener), 3 parts of cross-linking agent (multifunctional epoxy cross-linking agent), 0.4 parts of catalyst (organic tin catalyst), 0.3 parts of nano-silver (particle size of 15 nanometers), 4 parts of self-healing material (polymer containing disulfide bonds) into 400 ml of biodegradable organic solvent (such as ethyl acetate), stir well to obtain a finishing agent solution.

[0041] Ultrasonic-assisted loading: 80 grams of linen textiles are soaked in the finishing agent solution and treated under ultrasonic power of 180 watts for 25 minutes to evenly load N,N-diethyl-2-hydroxy-2-phenylacetamide and other components onto the textiles.

[0042] Low-temperature cross-linking and curing: The loaded textile is cross-linked and cured at 65°C for 1.5 hours to form a chemical bond between the finishing agent and the textile fibers and fix N,N-diethyl-2-hydroxy-2-phenylacetamide and other components.

[0043] Post-treatment: The cured textiles are cleaned, dried and other post-treatments are performed to remove impurities remaining on the surface to obtain textiles with long-lasting mosquito repellent and slow-release functions.

[0044] Comparative test: Take hemp textiles of the same quality and specifications, and use the existing conventional direct immersion adsorption method to load N, N-diethyl-2-hydroxy-2-phenylacetamide onto the textiles, without using the special components and processes such as nanoporous materials, pH-responsive microcapsules, and thickeners in the present invention. The textiles treated in this embodiment are compared with the textiles in the control group for performance testing. After 5 standard washing procedures, the residual amount of N, N-diethyl-2-hydroxy-2-phenylacetamide on the textiles treated by the present invention is 70% of the initial load, while the control group is only 30%; in the antibacterial test, the antibacterial rate of the textiles treated by the present invention against common bacteria reaches 95%, while the control group is only 70%. In the anti-ultraviolet test, the ultraviolet protection factor (UPF) of the textiles treated by the present invention remains above 40 after 5 washings, while the control group drops below 20.

[0045] Example 4

[0046] Preparation of nanoporous material: 150 g of tetraethyl orthosilicate, 300 g of ethanol, 70 g of water and 7 g of hydrochloric acid were mixed and reacted for 4.5 hours under stirring to form a sol. The sol was aged at 75°C for 40 hours to obtain a gel. The gel was then dried at 130°C for 18 hours and then calcined at 580°C for 4.5 hours to obtain a nano-silica porous material.

[0047] Preparation of pH-responsive microcapsules: 15 g of N,N-diethyl-2-hydroxy-2-phenylacetamide was dissolved in 70 ml of dichloromethane, added to 300 ml of aqueous solution containing 20 g of pH-responsive microcapsule wall material polymer (copolymerized by acrylic acid and isobutyl methacrylate), and an emulsion was formed by high-speed stirring. A crosslinking agent, decanedial, was added and reacted at 50°C for 5.5 hours to prepare pH-responsive microcapsules.

[0048] Preparation of the finishing agent: In parts by mass, add 20 parts of nano-silica porous material, 7 parts of tackifier (copolymer containing hydroxyl, carboxyl and amino groups), 2 parts of antioxidant (hindered phenol antioxidant), 2 parts of light stabilizer (benzotriazole light stabilizer), 5 parts of softener (silicone softener), 6 parts of cross-linking agent (multifunctional epoxy cross-linking agent), 1 part of catalyst (organotin catalyst), 1 part of nano-silver (particle size of 40 nanometers), and 8 parts of self-healing material (polymer containing hydrogen bonds) into 800 ml of water, stir evenly, and obtain a finishing agent solution.

[0049] Ultrasonic-assisted loading: 150 g of silk textiles were immersed in the finishing agent solution and treated under 300 watts of ultrasonic wave for 45 minutes to evenly load N,N-diethyl-2-hydroxy-2-phenylacetamide and other components onto the textiles.

[0050] Low-temperature cross-linking and curing: The loaded textiles are cross-linked and cured at 75°C for 2.5 hours to form chemical bonds between the finishing agent and the textile fibers and to fix N,N-diethyl-2-hydroxy-2-phenylacetamide and other components.

[0051] Post-treatment: The cured textiles are cleaned, dried and other post-treatments are performed to remove impurities remaining on the surface to obtain textiles with long-lasting mosquito repellent and slow-release functions.

[0052] Comparative test: Take the same silk textile, use the existing simple spraying method to coat N,N-diethyl-2-hydroxy-2-phenylacetamide on the surface of the textile, and do not use the series of innovative processes and formulas of the present invention. After 10 washes, the textiles treated by the present invention can still maintain good UV resistance, with an ultraviolet protection factor (UPF) of 50+, while the UPF value of the control group drops below 20; in the hand feel test, the softness score of the textiles treated by the present invention reaches 8 points (out of 10 points), while the control group is only 5 points. In the self-repair performance test, the two groups of textiles were subjected to simulated wear, and the surface damage of the textiles treated by the present invention was significantly repaired after a period of time, while the control group had almost no repair effect.

[0053] Example 5

[0054] Preparation of nanoporous material: 110 g of tetraethyl orthosilicate, 220 g of ethanol, 55 g of water and 5.5 g of hydrochloric acid were mixed and reacted for 3.5 hours under stirring to form a sol. The sol was aged at 65°C for 30 hours to obtain a gel. The gel was then dried at 110°C for 13 hours and then calcined at 520°C for 3.5 hours to obtain a nano-silica porous material.

[0055] Preparation of pH-responsive microcapsules: 11 g of N,N-diethyl-2-hydroxy-2-phenylacetamide was dissolved in 55 ml of dichloromethane, added to 220 ml of aqueous solution containing 16 g of pH-responsive microcapsule wall material polymer (copolymer of acrylic acid and methyl methacrylate and ethyl methacrylate), and an emulsion was formed by high-speed stirring. A mixed crosslinking agent of glutaraldehyde and adipic dialdehyde (mass ratio 1:1) was added, and the reaction was carried out at 42°C for 4.5 hours to prepare pH-responsive microcapsules.

[0056] Preparation of the finishing agent: by weight, add 16 parts of nano-silica porous material, 5.5 parts of tackifier (copolymer containing hydroxyl, carboxyl and amino groups), 1.2 parts of antioxidant (hindered phenol antioxidant), 1.2 parts of light stabilizer (benzotriazole light stabilizer), 3.5 parts of softener (silicone softener), 4.5 parts of cross-linking agent (multifunctional epoxy cross-linking agent), 0.6 parts of catalyst (organotin catalyst), 0.6 parts of nano-silver (particle size of 25 nanometers), 5.5 parts of self-healing material (polymer containing a mixture of disulfide bonds and hydrogen bonds) into 550 ml of water, stir evenly, and obtain a finishing agent solution.

[0057] Ultrasonic-assisted loading: 110 g of polyester fiber textiles were immersed in the finishing agent solution and treated under ultrasonic wave with a power of 220 watts for 35 minutes to uniformly load N,N-diethyl-2-hydroxy-2-phenylacetamide and other components onto the textiles.

[0058] Low-temperature cross-linking and curing: The loaded textiles are cross-linked and cured at 72°C for 2.2 hours to form chemical bonds between the finishing agent and the textile fibers and to fix N,N-diethyl-2-hydroxy-2-phenylacetamide and other components.

[0059] Post-treatment: The cured textiles are cleaned, dried and other post-treatments are performed to remove impurities remaining on the surface to obtain textiles with long-lasting mosquito repellent and slow-release functions.

[0060] Comparative test: The same polyester fiber textiles were selected, and N,N-diethyl-2-hydroxy-2-phenylacetamide was treated on the textiles using the existing ordinary padding process, which does not involve the innovation of the present invention. After 3 months of simulated daily wear, the self-repair function of the textiles treated by the present invention took effect, and the slight damage on the surface was effectively repaired, while the textiles in the control group were obviously damaged and could not repair themselves; in the sustained-release performance test, the textiles treated by the present invention can still slowly release N,N-diethyl-2-hydroxy-2-phenylacetamide after 3 months, and the release amount is 40% of the initial load, while the control group is only 10%. In the antibacterial persistence test, the antibacterial rate of the textiles treated by the present invention against common bacteria remained above 85% after 3 months, while the control group dropped below 60%.

[0061] Example 6

[0062] Preparation of nanoporous material: 90 g of tetraethyl orthosilicate, 200 g of ethanol, 45 g of water and 4.5 g of hydrochloric acid were mixed and reacted for 3 hours under stirring to form a sol. The sol was aged at 60°C for 25 hours to obtain a gel. The gel was then dried at 100°C for 12 hours and then calcined at 500°C for 3 hours to obtain a nano-silica porous material.

[0063] Preparation of pH-responsive microcapsules: 9 g of N,N-diethyl-2-hydroxy-2-phenylacetamide was dissolved in 45 ml of dichloromethane, added to 200 ml of aqueous solution containing 13 g of pH-responsive microcapsule wall material polymer (copolymerized by acrylic acid and isoamyl methacrylate), and an emulsion was formed by high-speed stirring. Then, a cross-linking agent, heptanedial, was added and reacted at 40°C for 4 hours to prepare pH-responsive microcapsules.

[0064] Preparation of the finishing agent: by weight, add 13 parts of nano-silica porous material, 4.5 parts of tackifier (copolymer containing hydroxyl, carboxyl and amino groups), 1 part of antioxidant (hindered phenol antioxidant), 1 part of light stabilizer (benzotriazole light stabilizer), 2.5 parts of softener (silicone softener), 3.5 parts of cross-linking agent (multifunctional epoxy cross-linking agent), 0.5 part of catalyst (organotin catalyst), 0.4 part of nano-silver (particle size of 20 nanometers), 4.5 parts of self-healing material (polymer containing a mixture of disulfide bonds and hydrogen bonds) into 450 ml of biodegradable organic solvent (such as propylene glycol methyl ether acetate), stir well to obtain a finishing agent solution.

[0065] Ultrasonic assisted loading: 90 grams of modal textiles were immersed in the finishing agent solution and treated for 30 minutes under the action of 200 watts of ultrasound to evenly load N,N-diethyl-2-hydroxy-2-phenylacetamide and other components onto the textiles.

[0066] Low-temperature cross-linking and curing: The loaded textiles are cross-linked and cured at 68°C for 1.8 hours to form chemical bonds between the finishing agent and the textile fibers and to fix N,N-diethyl-2-hydroxy-2-phenylacetamide and other components.

[0067] Post-treatment: The cured textiles are cleaned, dried and other post-treatments are performed to remove impurities remaining on the surface to obtain textiles with long-lasting mosquito repellent and slow-release functions.

[0068] Comparative test: Take modal textiles of the same quality and specifications, and use the existing conventional adsorption-drying method to load N,N-diethyl-2-hydroxy-2-phenylacetamide onto the textiles, without using the key technology and special components in the present invention. After 8 standard washing procedures, the residual amount of N,N-diethyl-2-hydroxy-2-phenylacetamide on the textiles treated by the present invention is 65% of the initial load, while the control group is only 25%; in the anti-ultraviolet test, the ultraviolet protection factor (UPF) of the textiles treated by the present invention remains above 35 after 200 hours of simulated sunlight exposure, while the control group drops below 15. In the hand feel test, the softness score of the textiles treated by the present invention is 7.5 points (out of 10 points) after washing 8 times, and the control group is only 4 points.

[0069] Example 7

[0070] Preparation of nanoporous material: 130 g of tetraethyl orthosilicate, 280 g of ethanol, 65 g of water and 6.5 g of hydrochloric acid were mixed and reacted for 4 hours under stirring to form a sol. The sol was aged at 70°C for 35 hours to obtain a gel. The gel was then dried at 120°C for 15 hours and then calcined at 550°C for 4 hours to obtain a nano-silica porous material.

[0071] Preparation of pH-responsive microcapsules: 13 g of N,N-diethyl-2-hydroxy-2-phenylacetamide was dissolved in 65 ml of dichloromethane, added to 280 ml of aqueous solution containing 17 g of pH-responsive microcapsule wall material polymer (copolymerized by acrylic acid and cyclohexyl methacrylate), and stirred at high speed to form an emulsion. A crosslinking agent, nonanedialdehyde, was added and reacted at 45°C for 5 hours to prepare pH-responsive microcapsules.

[0072] Preparation of the finishing agent: by weight, add 17 parts of nano-silica porous material, 5.5 parts of tackifier (copolymer containing hydroxyl, carboxyl and amino groups), 1.5 parts of antioxidant (hindered phenol antioxidant), 1.5 parts of light stabilizer (benzotriazole light stabilizer), 3.5 parts of softener (silicone softener), 4.5 parts of cross-linking agent (multifunctional epoxy cross-linking agent), 0.7 parts of catalyst (organotin catalyst), 0.6 parts of nano-silver (particle size of 30 nanometers), 5.5 parts of self-healing material (polymer containing mainly disulfide bonds) into 650 ml of water, stir evenly, and obtain a finishing agent solution.

[0073] Ultrasonic-assisted loading: 130 g of bamboo fiber textiles were immersed in the finishing agent solution and treated under the action of 250 watts of ultrasound for 35 minutes to evenly load N,N-diethyl-2-hydroxy-2-phenylacetamide and other components onto the textiles.

[0074] Low temperature cross-linking and curing: The loaded textiles are cross-linked and cured at 73°C for 2.2 hours to form chemical bonds between the finishing agent and the textile fibers and to fix N,N-diethyl-2-hydroxy-2-phenylacetamide and other components.

[0075] Post-treatment: The cured textiles are cleaned, dried and other post-treatments are performed to remove impurities remaining on the surface to obtain textiles with long-lasting mosquito repellent and slow-release functions.

[0076] Comparative test: Take the same bamboo fiber textiles, use the existing simple coating-thermosetting method to treat N,N-diethyl-2-hydroxy-2-phenylacetamide on the textiles, and do not use the innovative process of the present invention. After 12 washes, the antibacterial properties of the textiles treated by the present invention are still good, and the total antibacterial rate of common bacteria remains above 90%, while the control group drops to 65%. In the self-repair performance test, the two groups of textiles were subjected to the same degree of mechanical damage. The textiles treated by the present invention were basically repaired at the fiber damage within 24 hours, while the control group had almost no obvious signs of repair. In the subsequent sustained-release performance test, the release curve of N,N-diethyl-2-hydroxy-2-phenylacetamide of the textiles treated by the present invention remained stable, while the control group showed obvious fluctuations and premature attenuation.

[0077] Example 8

[0078] Preparation of nanoporous material: 105 g of tetraethyl orthosilicate, 230 g of ethanol, 53 g of water and 5.3 g of hydrochloric acid were mixed and reacted for 3.5 hours under stirring to form a sol. The sol was aged at 65°C for 30 hours to obtain a gel. The gel was then dried at 110°C for 13 hours and then calcined at 520°C for 3.5 hours to obtain a nano-silica porous material.

[0079] Preparation of pH-responsive microcapsules: 10.5 g of N,N-diethyl-2-hydroxy-2-phenylacetamide was dissolved in 53 ml of dichloromethane, added to 230 ml of aqueous solution containing 14.5 g of pH-responsive microcapsule wall material polymer (copolymerized from a variety of acrylic ester monomers), and an emulsion was formed by high-speed stirring. A crosslinking agent of glutaraldehyde and heptanedial mixed in a ratio of 2:1 was added, and the reaction was carried out at 42°C for 4.5 hours to prepare pH-responsive microcapsules.

[0080] Preparation of the finishing agent: by weight, add 14.5 parts of nano-silica porous material, 5 parts of tackifier (copolymer containing hydroxyl, carboxyl and amino groups), 1.2 parts of antioxidant (hindered phenol antioxidant), 1.2 parts of light stabilizer (benzotriazole light stabilizer), 3 parts of softener (silicone softener), 4 parts of cross-linking agent (multifunctional epoxy cross-linking agent), 0.6 parts of catalyst (organotin catalyst), 0.5 parts of nano-silver (particle size of 25 nanometers), 5 parts of self-healing material (polymer containing a mixture of hydrogen bonds and other dynamic chemical bonds) into 530 ml of water, stir evenly, and obtain a finishing agent solution.

[0081] Ultrasonic-assisted loading: 105 g of acrylic textile was immersed in the finishing agent solution and treated for 32 minutes under the action of 220 watts of ultrasound to uniformly load N,N-diethyl-2-hydroxy-2-phenylacetamide and other components onto the textile.

[0082] Low-temperature cross-linking and curing: The loaded textile is cross-linked and cured at 70°C for 2 hours to form a chemical bond between the finishing agent and the textile fibers, fixing N,N-diethyl-2-hydroxy-2-phenylacetamide and other components.

[0083] Post-treatment: The cured textiles are cleaned, dried and other post-treatments are performed to remove impurities remaining on the surface to obtain textiles with long-lasting mosquito repellent and slow-release functions.

[0084] Comparative test: The same acrylic textiles were selected, and N,N-diethyl-2-hydroxy-2-phenylacetamide was loaded onto the textiles using the existing traditional padding-baking process, without using the technical points of the present invention. After 4 months of simulated daily wear, the textiles treated by the present invention still performed well in antibacterial and anti-ultraviolet performance, while the antibacterial performance of the control group decreased significantly, and the inhibition rate of Escherichia coli dropped from the initial 80% to 50%, and the anti-ultraviolet performance was also greatly weakened, with the UPF value dropping from 40 to below 20. In terms of sustained-release performance, the release amount of N,N-diethyl-2-hydroxy-2-phenylacetamide from the textiles treated by the present invention can still be maintained at about 35% of the initial load, while the control group is only 15%.

[0085] Example 9: Sustained release agent modified based on polycaprolactone-polyethylene glycol block copolymer (PCL-PEG)

[0086] Design principle: Polycaprolactone (PCL) has good biocompatibility and degradability, and its hydrophobic ester structure helps to interact with the hydrophobic part of N,N-diethyl-2-hydroxy-2-phenylacetamide to achieve stable loading. Polyethylene glycol (PEG) is hydrophilic and can improve the dispersibility of the finishing agent in water. At the same time, the flexibility of the PEG chain segment can promote the combination of microcapsules and textile fibers and improve adhesion. In addition, PCL-PEG block copolymers can regulate the release rate of N,N-diethyl-2-hydroxy-2-phenylacetamide through hydrophilic-hydrophobic interactions under different environments.

[0087] Mechanism of group action: The ester group of PCL is tightly bound to the benzene ring and alkyl part of N,N-diethyl-2-hydroxy-2-phenylacetamide through van der Waals force and hydrophobic interaction to achieve effective loading. The hydroxyl group of PEG can form hydrogen bonds with polar groups such as hydroxyl groups on the surface of textile fibers to enhance the adhesion of the finishing agent to the textile. Under different humidity environments, the hydrophilicity of PEG enables it to absorb moisture, causing the conformation of the copolymer to change, thereby adjusting the release channel size of N,N-diethyl-2-hydroxy-2-phenylacetamide and achieving sustained release control.

[0088] Synthesis method: PCL-PEG block copolymer is prepared by ring-opening polymerization using ε-caprolactone (CL) and polyethylene glycol (PEG) as raw materials and stannous octoate as catalyst. The specific steps are as follows: a certain amount of PEG and stannous octoate are added to a dry reaction bottle, vacuumed and replaced with nitrogen three times, CL monomer is added, and the reaction is carried out at 130-150°C for 12-24 hours. After the reaction is completed, the product is dissolved with dichloromethane, precipitated with cold anhydrous ether, filtered and dried to obtain PCL-PEG block copolymer.

[0089] Preparation and treatment of finishing agent: 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-healing material, 8 parts of PCL-PEG block copolymer were added to 500 parts of water by weight, and stirred evenly to obtain finishing agent solution. 100 parts of nylon textiles were soaked in the finishing agent solution, treated for 30 minutes under the action of ultrasound with a power of 200 watts, then cross-linked and cured at 70°C for 2 hours, and finally washed, dried and other post-treatments were performed.

[0090] Comparative test: The same nylon textile was treated with the existing finishing agent without adding PCL-PEG block copolymer. After being placed in a high humidity environment for 1 month, the release of N, N-diethyl-2-hydroxy-2-phenylacetamide in the textile treated by the present invention was stable, and the antibacterial rate remained above 90%, while the release of the control group was too fast, and the antibacterial rate dropped to 70%.

[0091] Example 10: Sustained-release agent modified with dopamine

[0092] Design principle: Dopamine contains catechol structure and amino group. Catechol can undergo oxidation self-polymerization under weak alkaline conditions to form a polydopamine coating, which has excellent adhesion properties and can be firmly attached to the surface of textile fibers. At the same time, the amino group can react with the carboxyl group or other active groups of N,N-diethyl-2-hydroxy-2-phenylacetamide to achieve covalent bond connection, thereby improving the loading stability and sustained release effect of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0093] Group action mechanism: The polydopamine coating formed by dopamine self-polymerization is tightly bound to textile fibers through physical adsorption and chemical adhesion. The covalent bond formed by the reaction of amino groups with N,N-diethyl-2-hydroxy-2-phenylacetamide ensures its firm load on the textile. Under external stimuli, such as pH changes or mechanical friction, the structure of the polydopamine coating will change slightly, transmitting the force through covalent bonds to regulate the release rate of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0094] Synthesis method: dissolve dopamine hydrochloride in a Tris-HCl buffer solution (pH=8.5), stir and react at room temperature for 24 hours to obtain a polydopamine solution. During the reaction, dopamine hydrochloride undergoes oxidative self-polymerization under alkaline conditions to form polydopamine.

[0095] Preparation and treatment of finishing agent: 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-healing material, 6 parts of polydopamine were added to 500 parts of water by weight, and stirred evenly to obtain finishing agent solution. 100 parts of linen textiles were soaked in the finishing agent solution, treated for 30 minutes under the action of ultrasound with a power of 200 watts, and then cross-linked and cured at 70°C for 2 hours, and finally washed, dried and other post-treatments were performed.

[0096] Comparative test: The same linen textile was treated with an existing finishing agent without dopamine modification. After 20 washes, the residual amount of N,N-diethyl-2-hydroxy-2-phenylacetamide in the textile treated by the present invention was 55% of the initial load, while the control group was only 30%. In the anti-ultraviolet test, the ultraviolet protection factor (UPF) of the textile treated by the present invention remained above 30 after being exposed to the sun for 3 months outdoors, while the control group dropped below 18.

[0097] Example 11: Sustained-release agent modified based on cyclodextrin derivatives

[0098] Design principle: Cyclodextrin has a unique hollow ring structure, which can include N,N-diethyl-2-hydroxy-2-phenylacetamide through host-guest interaction to form a stable inclusion complex. Chemical modification of cyclodextrin to introduce specific groups, such as carboxymethyl, can enhance its water solubility and interaction with textile fibers, while regulating the formation and dissociation balance of the inclusion complex to achieve long-term mosquito repellent slow release of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0099] Mechanism of group action: The cavity of cyclodextrin forms an inclusion complex with N,N-diethyl-2-hydroxy-2-phenylacetamide through van der Waals forces, hydrophobic interactions and hydrogen bonds. The introduction of carboxyl groups increases the water solubility of cyclodextrin derivatives, allowing them to be better dispersed in the finishing agent solution, and the carboxyl groups can electrostatically attract the cationic groups on the surface of textile fibers, enhancing the bonding with the textiles. During use, changes in external environmental factors such as temperature and humidity will affect the stability of the inclusion complex, thereby controlling the release of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0100] Synthesis method: β-cyclodextrin and monochloroacetic acid are used as raw materials to react under alkaline conditions to prepare carboxymethyl-β-cyclodextrin. β-cyclodextrin is dissolved in sodium hydroxide solution, monochloroacetic acid is added, and stirred at 50-60°C for 6-8 hours. After the reaction is completed, the pH is adjusted to neutral with hydrochloric acid, and carboxymethyl-β-cyclodextrin is obtained through ethanol precipitation, filtration, and drying.

[0101] Preparation and treatment of finishing agent: by weight, add 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-healing material, 7 parts of carboxymethyl-β-cyclodextrin to 500 parts of water, stir evenly to obtain finishing agent solution. Soak 100 parts of spandex textiles in the finishing agent solution, treat them under the action of ultrasound with a power of 200 watts for 30 minutes, then cross-link and cure them at 70°C for 2 hours, and finally perform post-treatment such as washing and drying.

[0102] Comparative test: The same spandex textile was treated with the existing finishing agent without modified cyclodextrin derivatives. After one month of use in a simulated human sweating environment, the sustained release rate of N, N-diethyl-hydroxy-2-phenylacetamide in the textile treated by the present invention was stable and the antibacterial property was good, while the sustained release rate of the control group was accelerated, the antibacterial property decreased significantly, and the antibacterial rate against common bacteria was reduced by 20%.

[0103] Example 12: Sustained release agent modified with glycidyl methacrylate

[0104] Design principle: Glycidyl methacrylate (GMA) contains epoxy groups and carbon-carbon double bonds. The carbon-carbon double bonds can be copolymerized with other monomers through free radical polymerization to introduce GMA into the polymer network of the finishing agent. The epoxy group has high reactivity and can undergo a ring-opening reaction with active groups such as hydroxyl and amino groups on the surface of textile fibers to form chemical bonds and enhance the adhesion of the finishing agent to the textile. At the same time, the epoxy group can also react with the active groups of N,N-diethyl-2-hydroxy-2-phenylacetamide to achieve its stable loading and sustained release control.

[0105] Group action mechanism: During the preparation of the finishing agent, the carbon-carbon double bond of GMA participates in the polymerization reaction and integrates it into the polymer network. When the finishing agent comes into contact with the textile, the epoxy group reacts with the active groups on the surface of the textile fiber to form a strong chemical bond. For N,N-diethyl-2-hydroxy-2-phenylacetamide, its hydroxyl or amino group can undergo a ring-opening reaction with the epoxy group to form a stable connection. During use, the swelling and shrinkage of the polymer network and the hydrolysis of the chemical bond between the epoxy group and N,N-diethyl-2-hydroxy-2-phenylacetamide jointly regulate the release rate of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0106] Synthesis method: Methacrylic acid and epichlorohydrin are used as raw materials to react and prepare GMA under the catalysis of sodium hydroxide and tetrabutylammonium bromide. Methacrylic acid, epichlorohydrin, sodium hydroxide and tetrabutylammonium bromide are added to a reaction bottle, stirred at 50-60°C for 4-6 hours, and after the reaction is completed, GMA is obtained through separation, washing, distillation and other steps.

[0107] Preparation and treatment of finishing agent: by weight, add 15 parts of nano-silicon dioxide porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-repairing material, 6 parts of polymer obtained by copolymerization of GMA and other monomers to 500 parts of water, and stir evenly to obtain finishing agent solution. Soak 100 parts of silk textiles in the finishing agent solution, treat them under the action of ultrasound with a power of 200 watts for 30 minutes, then cross-link and cure them at 70°C for 2 hours, and finally perform post-treatment such as washing and drying.

[0108] Comparative test: The same silk textile was treated with an existing finishing agent without GMA modification. After 30 gentle washes, the residual amount of N,N-diethyl-2-hydroxy-2-phenylacetamide in the textile treated by the present invention was 50% of the initial load, while the control group was only 25%. In the hand feel test, the softness score of the textile treated by the present invention remained above 7 points (out of 10 points) after multiple washes, while the control group dropped to 5 points.

[0109] Example 13: Sustained release agent based on polyethyleneimine modification

[0110] Design principle: Polyethyleneimine (PEI) has a large number of amino groups, which are strongly alkaline and nucleophilic. On the one hand, the amino group can react with the carboxyl group, carbonyl group and other active groups of N,N-diethyl-2-hydroxy-2-phenylacetamide to form a stable chemical bond, thereby achieving the effective loading of N,N-diethyl-2-hydroxy-2-phenylacetamide. On the other hand, the amino group can electrostatically attract and chemically react with the acidic groups or negatively charged sites on the surface of textile fibers, thereby enhancing the adhesion of the finishing agent to the textile. In addition, the branched structure of PEI can form a three-dimensional network in the finishing agent, further regulating the release of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0111] Group action mechanism: The amino group of PEI reacts with N,N-diethyl-2-hydroxy-2-phenylacetamide to form an amide bond or other covalent bonds, fixing it on the PEI molecule. When combined with textile fibers, the amino group undergoes electrostatic attraction and chemical reactions with the groups on the fiber surface, such as forming hydrogen bonds with the hydroxyl groups on the surface of cellulose fibers or undergoing amidation reactions with the carboxyl groups on the surface of certain fibers. Under different pH environments, the amino group of PEI will be protonated or deprotonated, resulting in changes in its molecular conformation, thereby regulating the release rate of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0112] Synthesis method: PEI is prepared by ring-opening polymerization using ethyleneimine as raw material. At a certain temperature and pressure, ethyleneimine is introduced into a reactor, an initiator is added, and PEI is obtained after a certain reaction time.

[0113] Preparation and treatment of finishing agent: 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-healing material, 7 parts of PEI were added to 500 parts of water by weight, and stirred evenly to obtain finishing agent solution. 100 parts of ramie textiles were soaked in the finishing agent solution, treated under ultrasonic power of 200 watts for 30 minutes, then cross-linked and cured at 70°C for 2 hours, and finally cleaned, dried and other post-treatments were performed.

[0114] Comparative test: The same ramie textiles were treated with existing finishing agents without PEI modification. After 5 months of simulated daily wear and washing, the textiles treated by the present invention had good self-repair function, the surface damage was effectively repaired, and the sustained release performance of N, N-diethyl-2-hydroxy-2-phenylacetamide was stable, while the self-repair effect of the control group was poor, the sustained release performance was significantly reduced, and the release amount of N, N-diethyl-2-hydroxy-2-phenylacetamide was less than 20% of the initial load.

[0115] Example 14: Sustained-release agent modified with succinic anhydride

[0116] Design principle: Succinic anhydride contains anhydride groups, which have high reactivity. In the finishing agent system, the anhydride can react with the hydroxyl, amino and other groups in the finishing agent to introduce succinic anhydride into the polymer structure. The polymer modified by succinic anhydride has hydrophilicity and certain flexibility. The hydrophilicity helps to improve the dispersibility of the finishing agent in water, and the flexible structure can promote its entanglement and bonding with textile fibers, while adjusting the release environment of N, N-diethyl-2-hydroxy-2-phenylacetamide to achieve long-term slow release of mosquito repellent.

[0117] Group action mechanism: Acid anhydride reacts with hydroxyl and amino groups in the finishing agent to form ester bonds or amide bonds, thereby modifying succinic anhydride to the polymer molecular chain. When combined with textile fibers, the modified polymer is tightly bound to the fiber through intermolecular forces such as hydrogen bonds and van der Waals forces. For N,N-diethyl-2-hydroxy-2-phenylacetamide, the surrounding polymer environment is changed by the introduction of succinic anhydride. Under the action of water and other external factors, the swelling and shrinkage behavior of the polymer changes, thereby regulating the release rate of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0118] Synthesis method: Succinic anhydride is reacted with excess ethanol in the presence of p-toluenesulfonic acid as a catalyst to generate diethyl succinate. Diethyl succinate is then hydrolyzed with sodium hydroxide solution to obtain succinic acid. Succinic acid is then dehydrated and cyclized in the presence of acetic anhydride to obtain succinic anhydride.

[0119] Preparation and treatment of finishing agent: by weight, add 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-healing material, 6 parts of succinic anhydride modified polymer to 500 parts of water, stir evenly to obtain finishing agent solution. Soak 100 parts of artificial cotton textiles in the finishing agent solution, treat them under the action of ultrasound with a power of 200 watts for 30 minutes, then cross-link and cure them at 70°C for 2 hours, and finally perform post-treatment such as washing and drying.

[0120] Comparative test: The same artificial cotton textile was treated with the existing finishing agent without succinic anhydride modification. After 40 washes, the residual amount of N,N-diethyl-2-hydroxy-2-phenylacetamide in the textile treated by the present invention was 45% of the initial load, while the control group was only 18%. In the antibacterial test, the antibacterial rate of the textile treated by the present invention against common bacteria remained above 85% after multiple washes, while the control group dropped to 60%.

[0121] Embodiment 15

[0122] Modified organic compounds

[0123] 4-Aminobenzoic acid 3-methoxyphenyl ester (AMBMP)

[0124] Design Principle

[0125] 4-aminobenzoic acid-3-methoxyphenyl ester contains an amino group and an ester group. The amino group can undergo an amidation reaction with the carboxyl group of N,N-diethyl-2-hydroxy-2-phenylacetamide to achieve covalent bonding between the two, thereby improving the loading stability of N,N-diethyl-2-hydroxy-2-phenylacetamide on textiles. At the same time, the presence of the ester group can adjust the hydrophilicity and hydrophobicity of the molecule to a certain extent, making it better dispersed in the finishing agent system, and interacting with the groups on the surface of the textile fibers to enhance adhesion. In addition, the ester group can be hydrolyzed under certain conditions, providing a controllable pathway for the sustained release of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0126] Group action mechanism

[0127] The amino group reacts with the carboxyl group of N,N-diethyl-2-hydroxy-2-phenylacetamide to form a stable amide bond, ensuring that N,N-diethyl-2-hydroxy-2-phenylacetamide is firmly connected to the modified compound. When combined with textile fibers, the carbonyl oxygen atom in the ester group can form hydrogen bonds with the hydroxyl hydrogen atoms on the fiber surface, enhancing the bonding force with the textile. When in a humid environment or in the presence of microorganisms, the ester group will slowly hydrolyze and gradually cut off the connection with N,N-diethyl-2-hydroxy-2-phenylacetamide, thereby achieving the sustained release of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0128] Synthesis method

[0129] Using p-aminobenzoic acid and m-methoxyphenol as raw materials, add excess acetic anhydride to carry out esterification reaction under the catalysis of concentrated sulfuric acid. Add p-aminobenzoic acid, m-methoxyphenol and concentrated sulfuric acid into the reaction bottle, stir evenly, and then slowly add acetic anhydride. Reflux reaction at 80-100℃ for 4-6 hours.

[0130] After the reaction was completed, the reaction solution was poured into ice water, and solids were precipitated. The crude product was filtered and recrystallized from ethanol to obtain pure 4-aminobenzoic acid-3-methoxyphenyl ester.

[0131] Preparation and treatment of finishing agents

[0132] According to the weight ratio, 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-healing material, and 6 parts of 4-aminobenzoic acid-3-methoxyphenyl ester were added to 500 parts of water and stirred evenly to obtain a finishing agent solution. 100 parts of pure cotton textiles were soaked in the finishing agent solution, treated for 30 minutes under the action of ultrasound with a power of 200 watts, then cross-linked and cured at 70°C for 2 hours, and finally washed, dried and other post-treatments were performed.

[0133] Comparative test

[0134] Take the same pure cotton textile and treat it with the existing finishing agent without adding 4-aminobenzoic acid-3-methoxyphenyl ester modification. After 10 standard washes, the residual amount of N, N-diethyl-2-hydroxy-2-phenylacetamide in the textile treated by the present invention is 60% of the initial load, while the control group is only 30%. In the antibacterial test, the antibacterial rate of the textile treated by the present invention against Escherichia coli and Staphylococcus aureus is still as high as 85% and 80% respectively after washing 10 times, while the control group drops to 50% and 45%.

[0135] Example 16

[0136] Modified organic compounds

[0137] 2-Hydroxy-5-methylbenzaldehyde thiosemicarbazone (HMBTSC)

[0138] Design Principle

[0139] 2-Hydroxy-5-methylbenzaldehyde thiosemicarbazone contains hydroxyl, imino group and thiourea group after condensation of aldehyde group. Hydroxyl group can form hydrogen bonds with hydroxyl group on the surface of textile fiber, enhancing the adhesion between the finishing agent and textile. The imino group has certain stability and reactivity, and can react with the active group of N,N-diethyl-2-hydroxy-2-phenylacetamide to achieve its loading. The thiourea group has strong complexing ability and can react with metal ions (such as nanosilver in the finishing agent) to form a stable complex, which not only helps to evenly disperse nanosilver, but also can adjust the release environment of N,N-diethyl-2-hydroxy-2-phenylacetamide through complexing to achieve long-term sustained release.

[0140] Group action mechanism

[0141] The hydroxyl groups interact with the hydroxyl groups on the surface of textile fibers through hydrogen bonds, allowing the finishing agent to adhere tightly to the textile. The imine group undergoes a nucleophilic addition reaction with the carbonyl group of N,N-diethyl-2-hydroxy-2-phenylacetamide to form a stable connection. The thiourea group undergoes a complexation reaction with nanosilver, changing the microenvironment around the nanosilver, thereby affecting the interaction between N,N-diethyl-2-hydroxy-2-phenylacetamide and nanosilver. When affected by external factors (such as temperature and humidity changes), the structure of the complex changes, thereby regulating the release rate of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0142] Synthesis method

[0143] 2-Hydroxy-5-methylbenzaldehyde and thiosemicarbazide are added to an ethanol solution in a certain ratio and stirred for reaction at room temperature. During the reaction, the aldehyde group of 2-hydroxy-5-methylbenzaldehyde and the amino group of thiosemicarbazide undergo condensation reaction to generate 2-hydroxy-5-methylbenzaldehyde thiosemicarbazide.

[0144] After the reaction is completed, ethanol is removed by distillation under reduced pressure to obtain a crude product, which is then recrystallized using an appropriate solvent (such as a mixed solvent of ethyl acetate and petroleum ether) to obtain pure 2-hydroxy-5-methylbenzaldehyde thiosemicarbazone.

[0145] Preparation and treatment of finishing agents

[0146] According to the weight percentage, 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-repairing material, 5 parts of 2-hydroxy-5-methylbenzaldehyde thiosemicarbazone were added to 500 parts of water, and stirred evenly to obtain a finishing agent solution. 100 parts of pure wool textiles were immersed in the finishing agent solution, treated under ultrasonic power of 250 watts for 40 minutes, and then cross-linked and cured at 75°C for 2.5 hours, and finally washed, dried and other post-treatments were carried out.

[0147] Comparative test

[0148] Take the same pure wool textile and treat it with the existing finishing agent without adding 2-hydroxy-5-methylbenzaldehyde thiosemicarbazone modification. After 15 washes, the textile treated by the present invention can still maintain a good hand feel, and the softness score is above 7 points (out of 10 points), while the control group is only 5 points. In the anti-ultraviolet performance test, the ultraviolet protection factor (UPF) of the textile treated by the present invention is still maintained above 30 after long-term light exposure, while the control group drops below 15.

[0149] Embodiment 17

[0150] Modified organic compounds

[0151] 2-Methoxyethyl 3-Mercaptopropionate (MPME)

[0152] Design Principle

[0153] 2-Methoxyethyl 3-mercaptopropionate contains thiol and ester groups. The thiol group has strong nucleophilicity and can react with certain active groups (such as carbonyl) of N,N-diethyl-2-hydroxy-2-phenylacetamide to achieve the loading of N,N-diethyl-2-hydroxy-2-phenylacetamide. On the one hand, the ester group can adjust the solubility of the molecule to make it better dispersed in the finishing agent system. On the other hand, the hydrolysis of the ester group under certain conditions can control the release of N,N-diethyl-2-hydroxy-2-phenylacetamide. In addition, the thiol group can also complex or chemically react with certain metal ions or active sites on the surface of textile fibers to enhance the adhesion of the finishing agent to the textile.

[0154] Group action mechanism

[0155] The thiol group undergoes a nucleophilic addition reaction with the carbonyl group of N,N-diethyl-2-hydroxy-2-phenylacetamide to form a stable chemical bond, connecting N,N-diethyl-2-hydroxy-2-phenylacetamide to the modified compound. The ester group will slowly hydrolyze in water, and as the hydrolysis proceeds, the connection with N,N-diethyl-2-hydroxy-2-phenylacetamide gradually weakens, thereby achieving the sustained release of N,N-diethyl-2-hydroxy-2-phenylacetamide. When the finishing agent comes into contact with the textile, the thiol group can react with the metal ions (such as iron ions, copper ions, etc.) on the fiber surface, or react chemically with certain active groups (such as aldehyde groups) on the fiber surface, so that the finishing agent is firmly attached to the textile.

[0156] Synthesis method

[0157] 3-mercaptopropionic acid and 2-methoxyethanol are mixed in a certain proportion, and a proper amount of concentrated sulfuric acid is added as a catalyst. The esterification reaction is carried out at 100-120°C for 6-8 hours.

[0158] After the reaction is completed, the reaction solution is poured into a saturated sodium carbonate solution for neutralization, and then extracted with dichloromethane. The organic phase is dried over anhydrous sodium sulfate, filtered, and then distilled under reduced pressure to remove dichloromethane to obtain 2-methoxyethyl 3-mercaptopropionate.

[0159] Preparation and treatment of finishing agents

[0160] According to the weight ratio, 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-repairing material, and 6 parts of 3-mercaptopropionic acid-2-methoxyethyl ester were added to 500 parts of water and stirred evenly to obtain a finishing agent solution. 100 parts of linen textiles were immersed in the finishing agent solution, treated for 30 minutes under the action of ultrasound with a power of 200 watts, then cross-linked and cured at 70°C for 2 hours, and finally washed, dried and other post-treatments were performed.

[0161] Comparative test

[0162] The same linen textile was treated with the existing finishing agent without the addition of 3-mercaptopropionic acid-2-methoxyethyl ester modification. After 3 months of simulated outdoor use, the sustained release rate of N, N-diethyl-2-hydroxy-2-phenylacetamide in the textile treated by the present invention was stable and the antibacterial property was good, while the sustained release rate of the control group was accelerated, the antibacterial property decreased significantly, and the antibacterial rate against common bacteria was reduced by 25%.

[0163] Embodiment 18

[0164] Modified organic compounds

[0165] 4-Nitro-2-chlorobenzoic acid-N,N-dimethylaminoethyl ester(NCBDAE)

[0166] Design Principle

[0167] 4-nitro-2-chlorobenzoic acid-N,N-dimethylaminoethyl ester contains chlorine atoms, nitro groups, ester groups and amino groups. The chlorine atoms have certain reactivity and can undergo substitution reaction with the hydroxyl group of N,N-diethyl-2-hydroxy-2-phenylacetamide to achieve the loading of N,N-diethyl-2-hydroxy-2-phenylacetamide. The strong electron-withdrawing effect of the nitro group can adjust the electron cloud distribution of the molecule, affecting the interaction with N,N-diethyl-2-hydroxy-2-phenylacetamide and the adsorption performance on textiles. The hydrolysis characteristics of the ester group under different environments can be used to control the release of N,N-diethyl-2-hydroxy-2-phenylacetamide. The amino group can undergo electrostatic attraction and chemical reaction with the acidic groups or negatively charged sites on the surface of textile fibers, thereby enhancing the adhesion of the finishing agent to the textile.

[0168] Group action mechanism

[0169] The chlorine atom undergoes a substitution reaction with the hydroxyl group of N,N-diethyl-2-hydroxy-2-phenylacetamide to form a stable ether bond, connecting N,N-diethyl-2-hydroxy-2-phenylacetamide to the modified compound. The nitro group reduces the electron cloud density of the benzene ring connected to it by withdrawing electrons, thereby affecting the interaction with N,N-diethyl-2-hydroxy-2-phenylacetamide and making the combination more stable. The ester group will hydrolyze under acidic or alkaline conditions, and as the hydrolysis proceeds, N,N-diethyl-2-hydroxy-2-phenylacetamide is gradually released. The amino group undergoes a neutralization reaction with acidic groups such as carboxyl groups on the surface of textile fibers, or undergoes electrostatic attraction with negatively charged sites, allowing the finishing agent to firmly adhere to the textile.

[0170] Synthesis method

[0171] 4-nitro-2-chlorobenzoic acid and N,N-dimethylaminoethanol are added to a reaction bottle in a certain proportion, and an appropriate amount of triethylamine is added as an acid-binding agent, and the mixture is refluxed in anhydrous toluene. During the reaction, the carboxyl group of 4-nitro-2-chlorobenzoic acid and the hydroxyl group of N,N-dimethylaminoethanol undergo esterification to generate 4-nitro-2-chlorobenzoic acid-N,N-dimethylaminoethyl ester.

[0172] After the reaction is completed, the reaction solution is cooled and filtered to remove triethylamine hydrochloride. The filtrate is washed with dilute hydrochloric acid, then with saturated sodium bicarbonate solution, and finally dried with anhydrous sodium sulfate. Toluene is removed by reduced pressure distillation to obtain 4-nitro-2-chlorobenzoic acid-N,N-dimethylaminoethyl ester.

[0173] Preparation and treatment of finishing agents

[0174] According to the weight percentage, 15 parts of nano-silica porous material, 5 parts of tackifier, 1 part of antioxidant, 1 part of light stabilizer, 3 parts of softener, 4 parts of cross-linking agent, 0.5 parts of catalyst, 0.5 parts of nano-silver, 5 parts of self-healing material, 7 parts of 4-nitro-2-chlorobenzoic acid-N,N-dimethylaminoethyl ester were added to 500 parts of water, and stirred evenly to obtain a finishing agent solution. 100 parts of acrylic textiles were immersed in the finishing agent solution, treated for 32 minutes under the action of ultrasound with a power of 220 watts, and then cross-linked and cured at 70°C for 2 hours, and finally washed, dried and other post-treatments were performed.

[0175] Comparative test

[0176] Take the same acrylic textile and treat it with the existing finishing agent without adding 4-nitro-2-chlorobenzoic acid-N,N-dimethylaminoethyl ester modification. After 20 washes, the residual amount of N,N-diethyl-2-hydroxy-2-phenylacetamide in the textile treated by the present invention is 55% of the initial load, while the control group is only 20%. In the mosquito repellent test, the mosquito repellent effect of the textile treated by the present invention can still reach 80% after wearing for 1 month, while the control group drops to 40%.

[0177] Embodiment 19

[0178] The structure, composition and properties of the material are confirmed through a variety of analytical techniques. FT-IR spectroscopy can accurately identify characteristic functional groups in compounds. For example, in the examples, the specific absorption peaks of new organic compounds can verify their structural composition. 1 H NMR further determines the environment and quantity of hydrogen atoms in the molecule through chemical shift and peak area, and assists in clarifying the structure of the compound. Elemental analysis gives the proportion of each element in a quantitative form to ensure that the synthetic product meets expectations. These technologies confirm each other and ensure from different angles that the newly synthesized modifiers and recycled materials have accurate chemical structures and synergistic effects, as shown in Tables 1 and 2.

[0179] Table 1 Characterization verification

[0180]

[0181]

[0182]

[0183] Table 2 Sustained release enhancement test

[0184]

[0185]

[0186]

[0187]

[0188] The present invention selects a novel nanoporous material as the carrier of N, N-diethyl-2-hydroxy-2-phenylacetamide, and the amount is 10-20 parts by mass weight. This nanoporous material has a very large specific surface area and abundant pore structure, can adsorb N, N-diethyl-2-hydroxy-2-phenylacetamide in large quantities, and its pore size can be accurately controlled within a specific range, which is conducive to realizing the slow release of N, N-diethyl-2-hydroxy-2-phenylacetamide. For example, the nano silicon dioxide porous material prepared by a specific synthesis process has an average pore size of 20-50 nanometers and a specific surface area of ​​500-800 square meters / gram, can effectively load N, N-diethyl-2-hydroxy-2-phenylacetamide and realize long-acting sustained release.

[0189] Compared with the common carrier materials commonly used in the prior art, the common carrier materials have small specific surface area and irregular pore structure, and the adsorption amount of N, N-diethyl-2-hydroxy-2-phenylacetamide is limited, and its release rate cannot be effectively controlled. According to the test, when using the common carrier material, the residual amount of N, N-diethyl-2-hydroxy-2-phenylacetamide after 10 washings is less than 30% of the initial amount, while the nanoporous material of the present invention can maintain the residual amount above 60% under the same washing conditions, which greatly improves the long-term effect of N, N-diethyl-2-hydroxy-2-phenylacetamide on textiles.

[0190] A self-developed tackifier is added to the formula in an amount of 3-8 parts by weight. The tackifier can chemically react with the active groups on the surface of textile fibers to form chemical bonds, and can also interact with N,N-diethyl-2-hydroxy-2-phenylacetamide and carrier materials to enhance the binding force between them. The main components of the tackifier include organic polymers containing multiple active functional groups, such as copolymers containing hydroxyl groups, carboxyl groups and amino groups. By adding the tackifier, the adhesion of N,N-diethyl-2-hydroxy-2-phenylacetamide on textiles is significantly improved, and a high content can still be maintained after multiple washings, thereby ensuring the long-term effectiveness of its function.

[0191] The prior art generally lacks effective means of thickening, or the used thickening agent is not effective, which causes N,N-diethyl-2-hydroxy-2-phenylacetamide to fall off easily during washing. Comparative tests show that after five washes, the loss rate of N,N-diethyl-2-hydroxy-2-phenylacetamide in textiles without the thickening agent of the present invention is as high as 50%, while the loss rate of textiles with the thickening agent of the present invention is only 20%, which effectively improves the adhesion and long-term effect of N,N-diethyl-2-hydroxy-2-phenylacetamide on textiles.

[0192] pH-responsive microcapsules are used to encapsulate N,N-diethyl-2-hydroxy-2-phenylacetamide, and the amount of pH-responsive microcapsule wall material polymer is 8-15 parts by weight. The wall material of the microcapsule is composed of a special polymer, which undergoes structural changes under different pH environments. When the textile is in a weakly acidic environment on the surface of human skin (pH value is about 5.5-6.5), the structure of the microcapsule wall material will change slightly, so that N,N-diethyl-2-hydroxy-2-phenylacetamide can be slowly released to protect human skin; when the textile is in an alkaline detergent environment (pH value is about 8-10), the microcapsule wall material structure is relatively stable, reducing the release of N,N-diethyl-2-hydroxy-2-phenylacetamide, thereby increasing its retention rate during the washing process. This pH-responsive microcapsule technology effectively improves the utilization rate and long-term effectiveness of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0193] Compared with the common microcapsules in the prior art that are not environmentally responsive, the pH-responsive microcapsules of the present invention can better adapt to different environments and accurately control the release of N,N-diethyl-2-hydroxy-2-phenylacetamide. In the test simulating the human wearing and washing environment, textiles using common microcapsules released excessive N,N-diethyl-2-hydroxy-2-phenylacetamide during the washing process, resulting in a short duration of antibacterial and anti-ultraviolet functions in subsequent wearing; while textiles using the pH-responsive microcapsules of the present invention can continue to release N,N-diethyl-2-hydroxy-2-phenylacetamide during wearing after multiple washings, maintaining good functionality.

[0194] In the formula of the present invention, in addition to N, N-diethyl-2-hydroxy-2-phenylacetamide (5-15 parts by weight), carrier material and tackifier, a variety of functional additives are added. Including antioxidants (0.5-2 parts by weight), which can prevent N, N-diethyl-2-hydroxy-2-phenylacetamide from losing efficacy due to oxidation during storage and use; light stabilizers (0.5-2 parts by weight), which enhance the anti-ultraviolet performance of N, N-diethyl-2-hydroxy-2-phenylacetamide; and softeners (1-5 parts by weight), which improve the feel of textiles without affecting the sustained-release effect of N, N-diethyl-2-hydroxy-2-phenylacetamide. These additives work synergistically with each other to jointly improve the comprehensive performance of textiles.

[0195] The formulas in the prior art are often relatively simple and lack the coordination of multiple additives. For example, when antioxidants and light stabilizers are not added, the effective ingredients of N,N-diethyl-2-hydroxy-2-phenylacetamide will decompose rapidly under the action of light and air oxidation, resulting in a significant decrease in the anti-ultraviolet and antibacterial properties of the textiles in a short period of time. The present invention, through the multi-component composite formula design, significantly improves the stability of N,N-diethyl-2-hydroxy-2-phenylacetamide during the storage and use of the textiles, and makes various properties more durable and stable.

[0196] A low-temperature crosslinking and curing process is used in the preparation process. Conventional textile finishing processes usually require higher temperatures for crosslinking and curing, which may cause decomposition or performance degradation of N,N-diethyl-2-hydroxy-2-phenylacetamide. The present invention selects a specific crosslinking agent (2-6 parts by weight) and a catalyst (0.1-1 part by weight) to crosslink and cure at a lower temperature.

[0197] The cross-linking and curing between textiles and finishing agents can be achieved at a low temperature (60-80°C). This low-temperature cross-linking and curing process can not only effectively protect the structure and performance of N,N-diethyl-2-hydroxy-2-phenylacetamide, but also save energy and reduce production costs.

[0198] Compared with the traditional high-temperature cross-linking and curing process, the traditional process will partially decompose N,N-diethyl-2-hydroxy-2-phenylacetamide at high temperature (120-150°C), resulting in a decrease in its effective ingredient content, which in turn affects the functionality of the textile. According to tests, after treatment with the traditional high-temperature process, the effective ingredient loss rate of N,N-diethyl-2-hydroxy-2-phenylacetamide can reach 20%, while the low-temperature cross-linking and curing process of the present invention controls the effective ingredient loss rate within 5%, and at the same time reduces energy consumption by about 30%, which has significant advantages.

[0199] Ultrasonic-assisted technology was introduced in the process of loading N,N-diethyl-2-hydroxy-2-phenylacetamide onto carrier materials and textiles. The cavitation effect of ultrasound can produce tiny bubbles in the solution. When these bubbles burst, they will produce a local high temperature and high pressure environment, which promotes N,N-diethyl-2-hydroxy-2-phenylacetamide to enter the pore structure of the carrier material faster and more evenly, and enhances its bonding with textile fibers. Through ultrasonic-assisted loading technology, the loading efficiency and uniformity of N,N-diethyl-2-hydroxy-2-phenylacetamide are improved, thereby ensuring that its sustained release effect on textiles is more stable.

[0200] In the prior art, simple immersion or stirring methods are usually used for loading, which has low loading efficiency and unevenness, resulting in uneven distribution of N,N-diethyl-2-hydroxy-2-phenylacetamide on textiles, affecting the sustained-release effect and overall performance. Comparative experiments show that using the traditional loading method, the loading amount of N,N-diethyl-2-hydroxy-2-phenylacetamide on textiles is only 60% of the theoretical value, and there are obvious local concentration differences; while using ultrasonic-assisted loading technology, the loading amount can reach more than 90% of the theoretical value, and the distribution is uniform, which greatly improves the stability of the sustained-release effect.

[0201] Through a special preparation process, N,N-diethyl-2-hydroxy-2-phenylacetamide forms a gradient concentration distribution in different layers of textiles. In the surface layer of the textile, the concentration of N,N-diethyl-2-hydroxy-2-phenylacetamide is relatively low to ensure that it will not be quickly consumed due to excessive exposure; while in the inner layer of the textile, the concentration of N,N-diethyl-2-hydroxy-2-phenylacetamide is relatively high. As the N,N-diethyl-2-hydroxy-2-phenylacetamide in the surface layer is continuously released and consumed, the N,N-diethyl-2-hydroxy-2-phenylacetamide in the inner layer will gradually migrate to the surface layer and release, thereby achieving long-term sustained release. This gradient concentration distribution design further improves the utilization rate of N,N-diethyl-2-hydroxy-2-phenylacetamide and the durability of the sustained release effect.

[0202] In the prior art, N,N-diethyl-2-hydroxy-2-phenylacetamide on textiles is usually evenly distributed. The N,N-diethyl-2-hydroxy-2-phenylacetamide on the surface is easily and quickly consumed during use, while the components in the inner layer are difficult to effectively replenish.

[0203] Through simulated use tests, the effective concentration of N,N-diethyl-2-hydroxy-2-phenylacetamide in the existing uniformly distributed textiles decreased to 30% of the initial value after one month of use, while the effective concentration of the textiles designed with gradient concentration distribution of the present invention can still be maintained at more than 50% of the initial value after the same period of time, effectively extending the duration of the function.

[0204] A material with a self-repairing function is added to the formula in an amount of 2-8 parts by weight. When the textile is damaged by external friction, stretching, etc., this self-repairing material can automatically repair the damaged fiber structure to a certain extent, while keeping the sustained-release performance of N,N-diethyl-2-hydroxy-2-phenylacetamide unaffected. The self-repairing material is mainly composed of polymers containing dynamic chemical bonds, such as polymers containing reversible chemical bonds such as disulfide bonds and hydrogen bonds. When the fiber is damaged, these dynamic chemical bonds can be reversibly broken and reorganized to achieve self-repair of the fiber structure, thereby extending the service life of the textile and ensuring the long-term sustained-release function of N,N-diethyl-2-hydroxy-2-phenylacetamide.

[0205] Most existing textiles lack self-repairing function. Once the fiber structure is damaged, it not only affects the appearance and feel, but also causes the sustained release channel of N, N-diethyl-2-hydroxy-2-phenylacetamide to be destroyed, making its function fail prematurely. Experiments show that after 5 simulated wear tests, the sustained release rate of N, N-diethyl-2-hydroxy-2-phenylacetamide on ordinary textiles is significantly reduced, while the textiles added with the self-repairing material of the present invention, under the same test conditions, the sustained release rate remains basically stable, and the fiber structure is effectively repaired, which greatly improves the durability of the textiles and the durability of their functionality.

[0206] Nanosilver (particle size of 10-50 nanometers, dosage of 0.1-1 parts by weight) is combined with N,N-diethyl-2-hydroxy-2-phenylacetamide to construct a synergistic antibacterial system. Nanosilver has excellent antibacterial properties and can complement the antibacterial effect of N,N-diethyl-2-hydroxy-2-phenylacetamide, expand the antibacterial spectrum, and improve the antibacterial effect. At the same time, the presence of nanosilver can also promote the sustained release of N,N-diethyl-2-hydroxy-2-phenylacetamide, so that it can play an antibacterial role more effectively. By controlling the addition amount and particle size of nanosilver, the best synergistic effect with N,N-diethyl-2-hydroxy-2-phenylacetamide is achieved.

[0207] In the prior art, N,N-diethyl-2-hydroxy-2-phenylacetamide or a single type of antibacterial agent is used alone, the antibacterial effect is limited, and the inhibitory effect on certain specific bacteria is not obvious. Through antibacterial tests, when N,N-diethyl-2-hydroxy-2-phenylacetamide is used alone, the antibacterial rate against Escherichia coli is 80%, and the antibacterial rate against Staphylococcus aureus is 75%; while the nano-silver synergistic antibacterial system of the present invention is used, the antibacterial rate against Escherichia coli is increased to 95%, and the antibacterial rate against Staphylococcus aureus is increased to 90%, which significantly enhances the antibacterial effect, and in the long-term use process, the antibacterial performance is more stable and durable.

[0208] The preparation process of the present invention adopts green and environmentally friendly raw materials and methods. In terms of raw material selection, non-toxic and pollution-free materials are selected as much as possible to reduce harm to the environment and human body. For example, the solvent used is water or a biodegradable organic solvent; in the preparation process, harmful substances such as heavy metals are avoided as catalysts or additives. At the same time, the preparation process is optimized to reduce energy consumption and waste emissions, which meets the requirements of sustainable development.

[0209] In contrast, some existing preparation processes use toxic and harmful solvents and heavy metal catalysts, which not only pollute the environment, but may also remain on textiles and pose a potential threat to human health. In terms of energy consumption, existing processes are usually extensive and have low energy utilization. The green and environmentally friendly preparation process of the present invention reduces the generation of pollutants from the source, reduces energy consumption, and has good environmental and social benefits.

[0210] The above implementation modes are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A long-acting mosquito repellent slow-release composition for textiles, characterized in that: The composition comprises, by weight, 5-15 parts of N,N-diethyl-2-hydroxy-2-phenylacetamide, 10-20 parts of nanoporous materials, 3-8 parts of viscosity enhancers, 8-15 parts of pH-responsive microcapsule wall material polymers, 0.5-2 parts of antioxidants, 0.5-2 parts of light stabilizers, 1-5 parts of softeners, 2-6 parts of cross-linking agents, 0.1-1 parts of catalysts, 0.1-1 parts of nanosilver, 2-8 parts of self-healing materials, and the remainder of water or biodegradable organic solvents.

2. The long-acting mosquito repellent slow-release composition for textiles according to claim 1, characterized in that: The nanoporous material is a nano-silicon dioxide porous material, with an average pore diameter of 20-50 nanometers and a specific surface area of ​​500-800 square meters / gram.

3. The long-acting mosquito repellent slow-release composition for textiles according to claim 1, characterized in that: The tackifier is a copolymer containing hydroxyl, carboxyl and amino groups.

4. The long-acting mosquito repellent slow-release composition for textiles according to claim 1, characterized in that: The pH-responsive microcapsule wall material polymer is copolymerized with one or more of acrylic acid and methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, isoamyl methacrylate, and cyclohexyl methacrylate; the long-acting mosquito repellent sustained-release composition also includes synthetic modified organic compounds 4-aminobenzoic acid-3-methoxyphenyl ester, 2-hydroxy-5-methylbenzaldehyde thiosemicarbazone, 3-methoxyethyl mercaptopropionate, and 4-nitro-2-chlorobenzoic acid-N,N-dimethylaminoethyl ester.

5. A method for preparing a textile with a long-lasting mosquito repellent slow-release function, characterized in that: The following steps are involved: Preparation of nanoporous material: TEOS, ethanol, water and hydrochloric acid are mixed and stirred to form a sol, the sol is aged to obtain a gel, and the gel is dried and calcined to obtain a nano-silica porous material; Preparation of pH-responsive microcapsules: dissolving N,N-diethyl-2-hydroxy-2-phenylacetamide in dichloromethane, adding the solution to an aqueous solution containing a pH-responsive microcapsule wall material polymer, stirring at high speed to form an emulsion, and adding a crosslinking agent to react to prepare pH-responsive microcapsules; Preparation of finishing agent: adding nanoporous material, tackifier, antioxidant, light stabilizer, softener, crosslinking agent, catalyst, nanosilver, and self-repairing material to water or a biodegradable organic solvent in the proportions described in claim 1, and stirring to obtain a finishing agent solution; Ultrasonic assisted loading: The textile is immersed in the finishing agent solution, and the finishing agent is evenly loaded onto the textile under the action of ultrasound; Low-temperature cross-linking and curing: The loaded textiles are cross-linked and cured at 60-80°C to form a chemical bond between the finishing agent and the textile fibers; Post-processing: cleaning, drying and other post-processing of the cured textiles.

6. The method according to claim 5, characterized in that In the ultrasound-assisted loading step, the ultrasound power was 180-300 watts and the treatment time was 25-45 minutes.

7. The method according to claim 5, characterized in that In the low-temperature cross-linking and curing step, the cross-linking agent is a multifunctional epoxy cross-linking agent, and the catalyst is an organic tin catalyst.

8. Use of the long-acting mosquito repellent sustained-release composition according to any one of claims 1 to 4 in the preparation of textiles with antibacterial and anti-ultraviolet functions.

9. A textile with long-lasting mosquito repellent and sustained-release function prepared by the method according to any one of claims 5 to 7.

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