Highly durable silver-plated textile fiber and green preparation method thereof

Abstract

This invention relates to the field of silver-plated textile fiber technology, and particularly to a high-durability silver-plated textile fiber and its green preparation method. The green preparation method for the above-mentioned high-durability silver-plated textile fiber involves immersing the textile fiber in a degreasing solution, treating it at 60-70℃ for 15-25 min, washing, and drying; subjecting the degreasing fiber to low-temperature plasma treatment to obtain plasma-activated fiber; adding nano-SiO2 sol to Tris-HCl buffer solution and stirring at room temperature, then adding dopamine hydrochloride and stirring until homogeneous, adding the plasma-activated fiber and stirring, draining, and curing at 110-130℃ to obtain deposited fiber; immersing the deposited fiber in an activation solution for adsorption at room temperature, and washing to obtain silver ion-activated fiber; immersing the silver ion-activated fiber in a silver ammonia solution, adding glucose, and plating at 35-42℃ for 10-15 min, then washing to obtain silver-plated fiber; immersing the silver-plated fiber in a sealing solution, drying, baking, and vacuum drying.

Description

Technical Field

[0001] This invention relates to the field of silver-plated textile fiber technology, and in particular to a high-durability silver-plated textile fiber and its green preparation method. Background Technology

[0002] Silver-plated fibers combine the electrical conductivity, antibacterial properties, and electromagnetic shielding capabilities of silver with textile fibers, making them a core functional material in fields such as civilian underwear, home furnishings, anti-radiation clothing, and smart wearables. However, existing industrial silver plating technologies still face multiple bottlenecks.

[0003] First, traditional electroless plating pretreatment is highly polluting and damaging. Conventional processes rely on high concentrations of strong acids and alkalis for rough etching and use large amounts of stannous chloride (SnCl2) as a sensitizer and palladium salt (PdCl2) as an activator. This not only results in extremely high costs for treating heavy metal wastewater, but the highly corrosive environment also severely degrades the fiber polymer chains, leading to decreased fiber strength and increased brittleness, making it difficult to meet the mechanical performance requirements of high-end textiles.

[0004] Secondly, the technological process is limited and prone to patent disputes. To avoid traditional pollution, the industry has attempted modification methods such as ITO (indium tin oxide) coating, but these technologies are mostly protected by robust patents from international giants. If domestic companies follow this approach, they are highly susceptible to infringement risks, restricting the free implementation of the technology.

[0005] Furthermore, it's difficult to balance the stability of the silver coating with its performance in everyday wear. Metallic silver readily causes fibers to yellow and its conductivity to decrease in air; moreover, traditional coatings have weak adhesion to the fiber matrix and poor resistance to water washing and friction. To achieve a soft, skin-friendly feel in civilian applications, it's often necessary to reduce the coating thickness or add softeners, but this further sacrifices durability and shielding effectiveness.

[0006] In summary, existing technologies generally suffer from high pollution, high cost, and poor durability, failing to simultaneously meet the stringent requirements of high-end civilian textiles for green manufacturing, physical strength, long-lasting antibacterial properties, and skin-friendly comfort. Therefore, developing a palladium- and tin-free green manufacturing process that significantly improves silver layer adhesion and antioxidant properties is a pressing technical challenge in this field. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-durability silver-plated textile fiber and its green preparation method.

[0008] A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse the textile fibers in the degreasing solution, adjust the system to neutral, treat at 60-70℃ for 15-25 minutes, wash, and dry. S2. The degreased fibers are subjected to low-temperature plasma treatment for 40-90 seconds, using a mixture of argon and oxygen as the working gas, and the power of the low-temperature plasma treatment is 70-110W to obtain plasma-activated fibers. S3. Add nano-SiO2 sol to Tris-HCl buffer solution with pH 8-9 and stir at room temperature for 10-20 min. Add dopamine hydrochloride and stir evenly. Add plasma-activated fiber and stir for 2-6 h. Remove and drain. Pre-dry at 70-90℃ for 2-3 min. Then transfer to an environment of 110-130℃ for curing for 4-6 min to obtain deposited fiber. S4. Immerse the deposited fiber in the activation solution at room temperature for 4-6 minutes for adsorption, and wash to obtain silver ion activated fiber; S5. Immerse the silver ion activated fiber in silver ammonia solution, adjust the pH of the system to 9-10, add glucose, plate at 35-42℃ for 10-15 minutes, gently turn and clean to obtain silver-plated fiber. S6. Immerse the silver-plated fiber in the sealing solution for 1-2 minutes, remove it and dry it at 75-85℃, bake it at 115-125℃ for 5-8 minutes, wash it, and vacuum dry it at 60-80℃ for 1-2 hours.

[0009] Preferably, in S1, the degreasing solution includes the following components: 1-3 g / L fatty alcohol polyoxyethylene ether and 0.5-2 g / L isomeric alcohol polyoxyethylene ether.

[0010] Preferably, in S1, the textile fiber is nylon fiber.

[0011] Preferably, in S1, the mass ratio of textile fiber to degreasing liquid is 20-40:100-200.

[0012] Preferably, in S2, the working gas is composed of argon and oxygen in a volume ratio of 8-10:1.

[0013] Preferably, in S3, the mass ratio of nano-SiO2 sol, dopamine hydrochloride, and plasma-activated fibers is 5-15:1-2:20-40.

[0014] Preferably, in S4, the pH value of the activation solution is 7.5-8.5, and it includes the following components: 0.5-1 g / L silver nitrate and 0.5-1.2 g / L triammonium citrate.

[0015] Preferably, in S6, the sealing solution is prepared by the following steps: dissolving heptadecafluorodecyltrimethoxysilane in an aqueous ethanol solution, adjusting the pH of the system to 4-5, and hydrolyzing for 1-2 hours.

[0016] More preferably, the volume ratio of water to anhydrous ethanol in the ethanol-water solution is 20-30:70-80, and the mass fraction of heptadecafluorodecyltrimethoxysilane in the system is 0.8-1.5%.

[0017] A high-durability silver-plated textile fiber is prepared using the aforementioned green preparation method for high-durability silver-plated textile fibers.

[0018] Compared with existing technologies, the present invention has the following advantages: This invention employs a series of processes including fiber degreasing, low-temperature plasma activation, nano-SiO2 anchoring, direct silver ion adsorption activation, chemical silver plating, and fluorosilane antioxidant sealing. It is free of palladium, tin, ITO, and PAA, completely circumventing existing patent barriers. Specifically: 1) Plasma activation replaces traditional roughening, with no corrosion and no damage to strength; 2) Nano-SiO2 anchoring enhances bonding strength, eliminating the need for ITO / PAA; 3) Palladium-free and tin-free direct silver activation; 4) Single silver plating structure, soft to the touch and skin-friendly; 5) Employs a green glucose reduction system, which is gentle and environmentally friendly; 6) Fluorosilanes are hydrophobic and antioxidant, and do not use chitosan systems, thus avoiding patent barriers.

[0019] This invention significantly enhances the bonding force between the silver layer and the substrate by constructing a nano-SiO2 layer on the fiber surface. Combined with a fluorosilane hydrophobic and antioxidant sealing treatment, it significantly improves the water-washing abrasion resistance and discoloration resistance of the silver-plated fiber without relying on thickening the coating. The fiber retains ≥90% of its strength, has a surface resistivity of 10-300 Ω / sq, withstands ≥50 washes, and does not discolor after one year of storage in a warehouse without being unpacked. It utilizes a glucose green reduction system, resulting in a gentle and pollution-free process. Furthermore, the silver-plated fiber exhibits strong bonding, antioxidant properties, water resistance, a soft hand feel, and is skin-friendly and safe, making it particularly suitable for civilian antibacterial underwear, anti-radiation fabrics, anti-static home wear, smart wearables, and maternity and infant textiles. Attached Figure Description

[0020] Figure 1 This is a comparison chart showing the breaking strength retention rate and surface resistivity of fabrics made from silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3.

[0021] Figure 2 The graph shows a comparison of the surface resistance change rate of fabrics made from the silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3 after 50 washes and the number of washes when the resistance change rate exceeds 12%.

[0022] Figure 3This is a comparison chart showing the antibacterial rate and the antibacterial rate after 50 washes of fabrics made from the silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to specific embodiments. The given embodiments are merely illustrative of the invention and not intended to limit its scope. The embodiments provided below can serve as a guide for further improvements by those skilled in the art and do not constitute a limitation on the invention in any way.

[0024] Unless otherwise specified, the experimental methods used in the following examples are conventional methods, performed according to the techniques or conditions described in the literature in this field or according to the product instructions. Unless otherwise specified, the materials and reagents used in the following examples are commercially available.

[0025] The nano-SiO2 sol used below was purchased from Dongguan Huihe Yongsheng Nanotechnology Co., Ltd., with an effective ingredient content of 30%. The dopamine hydrochloride used below was purchased from Shanghai Zheyan Biotechnology Co., Ltd. The textile fiber used below was purchased from Guangdong Hengshen Meda New Materials Co., Ltd., with a specification of HTY 111Dtex / 36F. Example 1

[0026] A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse 20g of textile fiber in 100g of degreasing solution (including the following components: 1g / L fatty alcohol polyoxyethylene ether, 0.5g / L isomeric alcohol polyoxyethylene ether), adjust the system to neutral, treat at 60℃ for 15min, wash with deionized water until no foam is present, and dry. S2. Place the degreased fiber obtained in S1 into a low-temperature plasma treatment chamber and evacuate it to 30Pa. Introduce a working gas (composed of argon and oxygen in a volume ratio of 8:1). Control the power to 70W and treat at room temperature for 40s to obtain plasma-activated fiber. S3. Add 5g of nano-SiO2 sol to 100g of Tris-HCl buffer solution with pH 8 and stir at room temperature for 10min. Add 1g of dopamine hydrochloride and stir evenly. Add 20g of plasma-activated fiber obtained in S2 and stir at 20r / min for 2h. Remove and drain, pre-dry at 70℃ for 2min, and then transfer to 110℃ environment for curing for 4min to obtain deposited fiber. S4. Immerse the deposited fiber obtained in S3 in 100g of activation solution (pH=7.5, including the following components: 0.5g / L silver nitrate, 0.5g / L triammonium citrate), adsorb at room temperature for 4min, then take it out and wash it with water to obtain silver ion activated fiber; S5. Add ammonia to 100g of 0.5g / L silver nitrate solution until the precipitate just disappears. Immerse the silver ion-activated fiber obtained in S4, add sodium carbonate solution to adjust the pH of the system to 9, add 1g of glucose, plate at 35℃ for 10min, gently turn it over, and wash with deionized water to obtain silver-plated fiber. S6. Immerse the silver-plated fiber obtained in S5 in 100g of sealing solution for 1 minute, take it out and dry it at 75℃, bake it at 115℃ for 5 minutes, wash it with deionized water, and vacuum dry it at 60℃ for 1 hour.

[0027] The above-mentioned sealing solution was prepared by the following steps: heptadecanodecyltrimethoxysilane was dissolved in an aqueous ethanol solution (composed of water and anhydrous ethanol in a volume ratio of 20:80) to make the mass fraction of heptadecanodecyltrimethoxysilane in the system 0.8%; the pH of the system was adjusted to 4, and hydrolysis was carried out for 1 hour. Example 2

[0028] A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse 40g of textile fiber in 200g of degreasing solution (including the following components: 3g / L fatty alcohol polyoxyethylene ether, 2g / L isomeric alcohol polyoxyethylene ether), adjust the system to neutral, treat at 70℃ for 25min, wash with deionized water until no foam is present, and dry. S2. Place the degreased fibers obtained in S1 into a low-temperature plasma treatment chamber and evacuate to 50Pa; introduce working gas (composed of argon and oxygen in a volume ratio of 10:1); control the power to 110W and treat at room temperature for 90s to obtain plasma-activated fibers. S3. Add 15g of nano-SiO2 sol to 200g of Tris-HCl buffer solution with pH 8.5 and stir at room temperature for 20min. Add 2g of dopamine hydrochloride and stir evenly. Add 40g of plasma-activated fiber obtained in S2 and stir at 50r / min for 6h. Remove and drain, pre-dry at 90℃ for 3min, and then transfer to 130℃ environment for curing for 6min to obtain deposited fiber. S4. Immerse the deposited fiber obtained in S3 in 200g of activation solution (pH=8.5, including the following components: 1g / L silver nitrate, 1.2g / L triammonium citrate), and adsorb at room temperature for 6min. Then take it out and wash it with water to obtain silver ion activated fiber. S5. Add ammonia to 200g of silver nitrate solution with a concentration of 1g / L until the precipitate just disappears. Immerse the silver ion-activated fiber obtained in S4, add sodium carbonate solution to adjust the pH of the system to 9-10, add 5g of glucose, plate at 42℃ for 15min, gently turn it over, and wash with deionized water to obtain silver-plated fiber. S6. Immerse the silver-plated fiber obtained in S5 in 200g of sealing solution for 2min, take it out and dry it at 85℃, bake it at 125℃ for 8min, wash it with deionized water, and vacuum dry it at 80℃ for 2h.

[0029] The above-mentioned blocking solution was prepared by the following steps: heptadecanodecyltrimethoxysilane was dissolved in an aqueous ethanol solution (composed of water and anhydrous ethanol in a volume ratio of 30:70) so that the mass fraction of heptadecanodecyltrimethoxysilane in the system was 1.5%; the pH of the system was adjusted to 5, and hydrolysis was carried out for 2 hours. Example 3

[0030] A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse 25g of textile fiber in 180g of degreasing solution (including the following components: 1.5g / L fatty alcohol polyoxyethylene ether, 1.6g / L isomeric alcohol polyoxyethylene ether), adjust the system to neutral, treat at 62℃ for 22min, wash with deionized water until no foam is present, and dry. S2. Place the degreased fibers obtained in S1 into a low-temperature plasma treatment chamber and evacuate to 35 Pa; introduce working gas (composed of argon and oxygen in a volume ratio of 9.5:1); control the power to 80 W, treat at room temperature for 80 s, and obtain plasma-activated fibers. S3. Add 8g of nano-SiO2 sol to 120g of Tris-HCl buffer solution with pH 9 and stir at room temperature for 18min. Add 1.2g of dopamine hydrochloride and stir evenly. Add 35g of the plasma-activated fiber obtained in S2 and stir at 30r / min for 5h. Remove and drain, pre-dry at 75℃ for 2.5min, and then transfer to 125℃ to cure for 4.5min to obtain deposited fiber. S4. Immerse the deposited fiber obtained in S3 in 180g of activation solution (pH=7.5, including the following components: 0.9g / L silver nitrate, 0.6g / L triammonium citrate), adsorb at room temperature for 5.5min, then take it out and wash it with water to obtain silver ion activated fiber; S5. Add ammonia to 120g of 0.9g / L silver nitrate solution until the precipitate just disappears. Immerse the silver ion-activated fiber obtained in S4, add sodium carbonate solution to adjust the pH of the system to 9, add 4g of glucose, plate at 36℃ for 13min, gently turn it over, and wash with deionized water to obtain silver-plated fiber. S6. Immerse the silver-plated fiber obtained in S5 in 120g of sealing solution for 1.5min, take it out and dry it at 82℃, bake it at 118℃ for 7min, wash it with deionized water, and vacuum dry it at 65℃ for 100min.

[0031] The above-mentioned blocking solution was prepared by the following steps: heptadecanodecyltrimethoxysilane was dissolved in an aqueous ethanol solution (composed of water and anhydrous ethanol in a volume ratio of 25:75) so that the mass fraction of heptadecanodecyltrimethoxysilane in the system was 1%; the pH of the system was adjusted to 5, and hydrolysis was carried out for 80 min. Example 4

[0032] A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse 35g of textile fiber in 120g of degreasing solution (including the following components: 2.5g / L fatty alcohol polyoxyethylene ether, 1g / L isomeric alcohol polyoxyethylene ether), adjust the system to neutral, treat at 68℃ for 18min, wash with deionized water until no foam is present, and dry. S2. Place the degreased fibers obtained in S1 into a low-temperature plasma treatment chamber and evacuate to 45 Pa; introduce working gas (composed of argon and oxygen in a volume ratio of 8.5:1); control the power to 100 W and treat at room temperature for 50 s to obtain plasma-activated fibers. S3. Add 12g of nano-SiO2 sol to 180g of Tris-HCl buffer solution with pH 8.5 and stir at room temperature for 12min. Add 1.8g of dopamine hydrochloride and stir evenly. Add 25g of plasma-activated fiber obtained in S2 and stir at 40r / min for 3h. Remove and drain, pre-dry at 85℃ for 2.5min, and then transfer to 115℃ environment for curing for 5.5min to obtain deposited fiber. S4. Immerse the deposited fiber obtained in S3 in 120g of activation solution (pH=8.5, including the following components: 0.6g / L silver nitrate, 1g / L triammonium citrate), and adsorb at room temperature for 4.5min. Then take it out and wash it with water to obtain silver ion activated fiber. S5. Add ammonia to 180g of 0.6g / L silver nitrate solution until the precipitate just disappears. Immerse the silver ion-activated fiber obtained in S4, add sodium carbonate solution to adjust the pH of the system to 10, add 2g of glucose, plate at 40℃ for 11min, gently turn it over, and wash with deionized water to obtain silver-plated fiber. S6. Immerse the silver-plated fiber obtained in S5 in 180g of sealing solution for 1.5min, take it out and dry it at 78℃, bake it at 122℃ for 6min, wash it with deionized water, and vacuum dry it at 75℃ for 80min.

[0033] The above-mentioned blocking solution was prepared by the following steps: heptadecanodecyltrimethoxysilane was dissolved in an aqueous ethanol solution (composed of water and anhydrous ethanol in a volume ratio of 25:75) so that the mass fraction of heptadecanodecyltrimethoxysilane in the system was 1.4%; the pH of the system was adjusted to 4, and hydrolysis was performed for 100 min. Example 5

[0034] A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse 30g of textile fiber in 150g of degreasing solution (including the following components: 2g / L fatty alcohol polyoxyethylene ether, 1.5g / L isomeric alcohol polyoxyethylene ether), adjust the system to neutral, treat at 65℃ for 20min, wash with deionized water until no foam is present, and dry. S2. Place the degreased fiber obtained in S1 into a low-temperature plasma treatment chamber and evacuate it to 40Pa. Introduce a working gas (composed of argon and oxygen in a volume ratio of 9:1). Control the power to 90W and treat at room temperature for 60s to obtain plasma-activated fiber. S3. Add 10g of nano-SiO2 sol to 150g of Tris-HCl buffer solution with pH 9 and stir at room temperature for 15min. Add 1.5g of dopamine hydrochloride and stir evenly. Add 30g of plasma-activated fiber obtained in S2 and stir at 35r / min for 4h. Remove and drain, pre-dry at 80℃ for 2.5min, and then transfer to 120℃ environment for curing for 5min to obtain deposited fiber. S4. Immerse the deposited fiber obtained in S3 in 150g of activation solution (pH=8.0, including the following components: 0.75g / L silver nitrate, 0.8g / L triammonium citrate), adsorb at room temperature for 5min, then take it out and wash it with water to obtain silver ion activated fiber; S5. Add ammonia to 150g of 0.8g / L silver nitrate solution until the precipitate just disappears. Immerse the silver ion-activated fiber obtained in S4, add sodium carbonate solution to adjust the pH of the system to 10, add 3g of glucose, plate at 38℃ for 12min, gently turn it over, and wash with deionized water to obtain silver-plated fiber. S6. Immerse the silver-plated fiber obtained in S5 in 150g of sealing solution for 1.5min, take it out and dry it at 80℃, bake it at 120℃ for 6.5min, wash it with deionized water, and vacuum dry it at 70℃ for 90min.

[0035] The above-mentioned blocking solution was prepared by the following steps: heptadecanofluorodecyltrimethoxysilane was dissolved in an aqueous ethanol solution (composed of water and anhydrous ethanol in a volume ratio of 25:75) to make the mass fraction of heptadecanofluorodecyltrimethoxysilane in the system 1.2%; the pH of the system was adjusted to 4.5 and hydrolyzed for 90 min.

[0036] Comparative Example 1 A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse 30g of textile fiber in 150g of degreasing solution (including the following components: 2g / L fatty alcohol polyoxyethylene ether, 1.5g / L isomeric alcohol polyoxyethylene ether), adjust the system to neutral, treat at 65℃ for 20min, wash with deionized water until no foam is present, and dry. S2. Place the degreased fiber obtained in S1 into a low-temperature plasma treatment chamber and evacuate it to 40Pa. Introduce a working gas (composed of argon and oxygen in a volume ratio of 9:1). Control the power to 90W and treat at room temperature for 60s to obtain plasma-activated fiber. S3. Add 11.5g of nano-SiO2 sol to 150g of Tris-HCl buffer solution with pH 9 and stir at room temperature for 15min. Add 30g of plasma-activated fiber obtained in S2 and stir at 35r / min for 4h. Remove and drain, pre-dry at 80℃ for 2.5min, and then transfer to 120℃ environment for curing for 5min to obtain deposited fiber. S4. Immerse the deposited fiber obtained in S3 in 150g of activation solution (pH=8.0, including the following components: 0.75g / L silver nitrate, 0.8g / L triammonium citrate), adsorb at room temperature for 5min, then take it out and wash it with water to obtain silver ion activated fiber; S5. Add ammonia to 150g of 0.8g / L silver nitrate solution until the precipitate just disappears. Immerse the silver ion-activated fiber obtained in S4, add sodium carbonate solution to adjust the pH of the system to 10, add 3g of glucose, plate at 38℃ for 12min, gently turn it over, and wash with deionized water to obtain silver-plated fiber. S6. Immerse the silver-plated fiber obtained in S5 in 150g of sealing solution for 1.5min, take it out and dry it at 80℃, bake it at 120℃ for 6.5min, wash it with deionized water, and vacuum dry it at 70℃ for 90min.

[0037] The above-mentioned blocking solution was prepared by the following steps: heptadecanofluorodecyltrimethoxysilane was dissolved in an aqueous ethanol solution (composed of water and anhydrous ethanol in a volume ratio of 25:75) to make the mass fraction of heptadecanofluorodecyltrimethoxysilane in the system 1.2%; the pH of the system was adjusted to 4.5 and hydrolyzed for 90 min.

[0038] Comparative Example 2 A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse 30g of textile fiber in 150g of degreasing solution (including the following components: 2g / L fatty alcohol polyoxyethylene ether, 1.5g / L isomeric alcohol polyoxyethylene ether), adjust the system to neutral, treat at 65℃ for 20min, wash with deionized water until no foam is present, and dry. S2. Place the degreased fiber obtained in S1 into a low-temperature plasma treatment chamber and evacuate it to 40Pa. Introduce a working gas (composed of argon and oxygen in a volume ratio of 9:1). Control the power to 90W and treat at room temperature for 60s to obtain plasma-activated fiber. S3. Add 10g of nano-SiO2 sol to 150g of Tris-HCl buffer solution with pH 9 and stir at room temperature for 15min. Add 1.5g of coupling agent KH-570 and stir evenly. Add 30g of plasma-activated fiber obtained in S2 and stir at 35r / min for 4h. Remove and drain, pre-dry at 80℃ for 2.5min, and then transfer to 120℃ environment for curing for 5min to obtain deposited fiber. S4. Immerse the deposited fiber obtained in S3 in 150g of activation solution (pH=8.0, including the following components: 0.75g / L silver nitrate, 0.8g / L triammonium citrate), adsorb at room temperature for 5min, then take it out and wash it with water to obtain silver ion activated fiber; S5. Add ammonia to 150g of 0.8g / L silver nitrate solution until the precipitate just disappears. Immerse the silver ion-activated fiber obtained in S4, add sodium carbonate solution to adjust the pH of the system to 10, add 3g of glucose, plate at 38℃ for 12min, gently turn it over, and wash with deionized water to obtain silver-plated fiber. S6. Immerse the silver-plated fiber obtained in S5 in 150g of sealing solution for 1.5min, take it out and dry it at 80℃, bake it at 120℃ for 6.5min, wash it with deionized water, and vacuum dry it at 70℃ for 90min.

[0039] The above-mentioned blocking solution was prepared by the following steps: heptadecanofluorodecyltrimethoxysilane was dissolved in an aqueous ethanol solution (composed of water and anhydrous ethanol in a volume ratio of 25:75) to make the mass fraction of heptadecanofluorodecyltrimethoxysilane in the system 1.2%; the pH of the system was adjusted to 4.5 and hydrolyzed for 90 min.

[0040] Comparative Example 3 A green preparation method for high-durability silver-plated textile fibers includes the following steps: S1. Immerse 30g of textile fiber in 150g of degreasing solution (including the following components: 2g / L fatty alcohol polyoxyethylene ether, 1.5g / L isomeric alcohol polyoxyethylene ether), adjust the system to neutral, treat at 65℃ for 20min, wash with deionized water until no foam is present, and dry. S2. Place the degreased fiber obtained in S1 into a low-temperature plasma treatment chamber and evacuate it to 40Pa. Introduce a working gas (composed of argon and oxygen in a volume ratio of 9:1). Control the power to 90W and treat at room temperature for 60s to obtain plasma-activated fiber. S3. Add 10g of nano-SiO2 sol to 150g of Tris-HCl buffer solution with pH 9 and stir at room temperature for 15min. Add 1.5g of dopamine hydrochloride and stir evenly. Add 30g of plasma-activated fiber obtained in S2 and stir at 35r / min for 4h. Remove and drain, pre-dry at 80℃ for 2.5min, and then transfer to 120℃ environment for curing for 5min to obtain deposited fiber. S4. Add ammonia to 150g of 0.8g / L silver nitrate solution until the precipitate just disappears. Immerse the deposited fiber obtained in S3, add sodium carbonate solution to adjust the pH of the system to 10, add 3g of glucose, plate at 38℃ for 12min, gently turn it over, and wash with deionized water to obtain silver-plated fiber. S5. Immerse the silver-plated fiber obtained in S4 in 150g of sealing solution for 1.5min, take it out and dry it at 80℃, bake it at 120℃ for 6.5min, wash it with deionized water, and vacuum dry it at 70℃ for 90min.

[0041] The above-mentioned blocking solution was prepared by the following steps: heptadecanofluorodecyltrimethoxysilane was dissolved in an aqueous ethanol solution (composed of water and anhydrous ethanol in a volume ratio of 25:75) to make the mass fraction of heptadecanofluorodecyltrimethoxysilane in the system 1.2%; the pH of the system was adjusted to 4.5 and hydrolyzed for 90 min.

[0042] The original textile fibers and the silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3 were woven into plain weave using the same process.

[0043] The tensile strength of the fabrics obtained in the above groups was determined in accordance with GB / T 3923.1-2013 "Textiles - Tensile Properties of Fabrics - Part 1: Determination of Breaking Strength and Elongation at Break (Strip Method)" and the tensile strength retention rate was calculated.

[0044] Tension retention rate = Tension of silver-plated fabric ÷ Tension of original fabric × 100%.

[0045] The surface resistance of fabrics made from silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3 was measured in accordance with GB / T 12703.4-2010 "Evaluation of electrostatic properties of textiles - Part 4: Resistivity".

[0046] like Figure 1 As shown, the fabric made from the silver-plated textile fiber obtained in Example 5 has the highest tensile strength retention rate and the lowest surface resistance, which is significantly better than the comparative example.

[0047] The fabrics made from the silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3 were washed according to the washing method of a household twin-tub washing machine in GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method" (section 10.1.2). After 50 washes, the surface resistance was measured and the resistance change rate was calculated. The washing was then continued until the resistance change rate exceeded 12%, and the number of washes was recorded.

[0048] Resistance change rate = (Surface resistance after washing - Surface resistance before washing) ÷ Surface resistance before washing × 100%.

[0049] like Figure 2 As shown, after 50 washes, the fabric made from the silver-plated textile fiber obtained in Example 5 exhibited the lowest rate of change in electrical resistance; while the fabric made from the silver-plated textile fiber obtained in Example 5 required the most washes to achieve a rate of change in electrical resistance exceeding 12%, significantly better than the comparative example (because the comparative example 3 already had a rate of change in electrical resistance exceeding 12% after 50 washes, therefore...). Figure 2 The number of washes is omitted in the text.

[0050] Referring to GB / T 20944.3-2008 "Evaluation of Antimicrobial Properties of Textiles - Part 3: Shaking Method", the antimicrobial rate of fabrics made from the silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3 was determined using Staphylococcus aureus (ATCC 6538). Referring to the washing method of a household twin-tub washing machine in GB / T 20944.3-2008 "Evaluation of Antimicrobial Properties of Textiles - Part 3: Shaking Method", the fabrics made from the silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3 were washed 50 times, and the antimicrobial rate of each group of fabrics was determined after washing.

[0051] like Figure 3 As shown, the fabric made from the silver-plated textile fiber obtained in Example 5 had the highest antibacterial rate against Staphylococcus aureus. Even after 50 washes, the fabric made from the silver-plated textile fiber obtained in Example 5 still had the highest antibacterial rate against Staphylococcus aureus, which was significantly better than the comparative example.

[0052] Referring to ASTM D3359, 3M tape was used to adhere to and peel off the surfaces of fabrics made from the silver-plated textile fibers obtained in Example 5 and Comparative Examples 1-3. The fabrics made from the silver-plated textile fibers obtained in Example 5 and Comparative Example 1 showed no surface peeling, while the fabrics made from the silver-plated textile fibers obtained in Comparative Examples 2 and 3 all experienced surface peeling.

[0053] The present invention has been described in detail above. Those skilled in the art will recognize that the invention can be practiced in a wide range of ways with equivalent parameters, concentrations, and conditions without departing from its spirit and scope, and without requiring unnecessary experiments. While specific embodiments have been provided, it should be understood that further modifications can be made to the invention. In summary, according to the principles of the invention, this application is intended to include any changes, uses, or improvements to the invention, including changes made using conventional techniques known in the art that depart from the scope disclosed herein.

Claims

1. A green preparation method for high-durability silver-plated textile fibers, characterized in that, Includes the following steps: S1. Immerse the textile fibers in the degreasing solution, adjust the system to neutral, treat at 60-70℃ for 15-25 minutes, wash, and dry. S2. The degreased fibers are subjected to low-temperature plasma treatment for 40-90 seconds, using a mixture of argon and oxygen as the working gas, and the power of the low-temperature plasma treatment is 70-110W to obtain plasma-activated fibers. S3. Add nano-SiO2 sol to Tris-HCl buffer solution with pH 8-9 and stir at room temperature for 10-20 min. Add dopamine hydrochloride and stir evenly. Add plasma-activated fiber and stir for 2-6 h. Remove and drain. Pre-dry at 70-90℃ for 2-3 min. Then transfer to an environment of 110-130℃ for curing for 4-6 min to obtain deposited fiber. S4. Immerse the deposited fiber in the activation solution at room temperature for 4-6 minutes for adsorption, and wash to obtain silver ion activated fiber; S5. Immerse the silver ion activated fiber in silver ammonia solution, adjust the pH of the system to 9-10, add glucose, plate at 35-42℃ for 10-15 minutes, gently turn and clean to obtain silver-plated fiber. S6. Immerse the silver-plated fiber in the sealing solution for 1-2 minutes, remove it and dry it at 75-85℃, bake it at 115-125℃ for 5-8 minutes, wash it, and vacuum dry it at 60-80℃ for 1-2 hours.

2. The green preparation method of high-durability silver-plated textile fiber according to claim 1, characterized in that, In S1, the degreasing solution includes the following components: 1-3 g / L fatty alcohol polyoxyethylene ether, 0.5-2 g / L isomeric alcohol polyoxyethylene ether.

3. The green preparation method of high-durability silver-plated textile fiber according to claim 1, characterized in that, In S1, the textile fiber is nylon fiber.

4. The green preparation method of high-durability silver-plated textile fiber according to claim 1, characterized in that, In S1, the mass ratio of textile fiber to degreasing liquid is 20-40:100-200.

5. The green preparation method of high-durability silver-plated textile fiber according to claim 1, characterized in that, In S2, the working gas consists of argon and oxygen in a volume ratio of 8-10:

1.

6. The green preparation method of high-durability silver-plated textile fiber according to claim 1, characterized in that, In S3, the mass ratio of nano-SiO2 sol, dopamine hydrochloride, and plasma-activated fibers is 5-15:1-2:20-40.

7. The green preparation method of high-durability silver-plated textile fiber according to claim 1, characterized in that, In S4, the pH value of the activation solution is 7.5-8.5, and it includes the following components: 0.5-1 g / L silver nitrate and 0.5-1.2 g / L triammonium citrate.

8. The green preparation method of the high-durability silver-plated textile fiber according to claim 1, characterized in that, In S6, the blocking solution is prepared by the following steps: dissolving heptadecafluorodecyltrimethoxysilane in an aqueous ethanol solution, adjusting the pH of the system to 4-5, and hydrolyzing for 1-2 hours.

9. The green preparation method of the high-durability silver-plated textile fiber according to claim 8, characterized in that, The volume ratio of water to anhydrous ethanol in the aqueous ethanol solution is 20-30:70-80, and the mass fraction of heptadecafluorodecyltrimethoxysilane in the system is 0.8-1.5%.

10. A high-durability silver-plated textile fiber, characterized in that, The high-durability silver-plated textile fiber is prepared using the green preparation method described in any one of claims 1-9.

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