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CN-119640582-B - Durable conductive silk fabric and preparation method thereof

CN119640582BCN 119640582 BCN119640582 BCN 119640582BCN-119640582-B

Abstract

The invention discloses a preparation method of durable conductive silk fabric, which comprises the steps of pretreating silk fabric by adopting formic acid aqueous solution to obtain pretreated silk fabric, preparing polyphenol substance solution, immersing pretreated silk in the polyphenol substance solution to obtain polyphenol modified silk fabric, respectively preparing silver nitrate aqueous solution, coffee acid aqueous solution and polyvinylpyrrolidone aqueous solution, uniformly mixing the three solutions, stirring and reacting for 5-10 min at room temperature, then heating to 28-30 ℃ and standing for 3-5 h, filtering to obtain silver nanowires, preparing polyethyleneimine aqueous solution, dispersing the silver nanowires in the polyethyleneimine aqueous solution to obtain silver nanowire/polyethyleneimine dispersion, immersing the polyphenol modified silk fabric in the silver nanowire/polyethyleneimine dispersion to perform treatment, and repeating the immersion and curing to obtain the silver nanowire/polyphenol/polyethyleneimine durable conductive silk fabric.

Inventors

  • XING TIELING
  • ZHU YULIN
  • XING LILI
  • CHENG JIN
  • SHI JIJUN
  • MEI DEXIANG
  • HU XIAOMING

Assignees

  • 江苏鑫缘丝绸科技有限公司
  • 苏州大学

Dates

Publication Date
20260508
Application Date
20241219

Claims (8)

  1. 1. The preparation method of the durable conductive silk fabric is characterized by comprising the following steps of: Pretreating silk fabric by adopting formic acid aqueous solution, washing the pretreated silk fabric to be neutral by using sodium carbonate aqueous solution, washing and drying by using clear water to obtain pretreated silk fabric; preparing a polyphenol substance solution, and immersing the pretreated silk in the polyphenol substance solution for treatment to obtain polyphenol modified silk fabric; Respectively preparing a silver nitrate aqueous solution, a coffee acid aqueous solution and a polyvinylpyrrolidone aqueous solution, uniformly mixing the three solutions, stirring at room temperature for reaction for 5-10 min, heating to 28-30 ℃ for standing reaction for 3-5 h, and filtering to obtain silver nanowires; Preparing a polyethyleneimine water solution, and dispersing the silver nanowires in the polyethyleneimine water solution to obtain silver nanowire/polyethyleneimine dispersion; Immersing the polyphenol modified silk fabric in the silver nanowire/polyethyleneimine dispersion liquid for treatment, and repeating the immersing and curing to obtain the silver nanowire/polyphenol/polyethyleneimine durable conductive silk fabric; The polyphenol substance is tannic acid and/or dopamine, wherein the polyphenol substance solution is formed by dissolving polyphenol substances in Tris hydrochloric acid buffer solution, and the concentration of the polyphenol substance solution is 0.1-10 g/L; The temperature of each curing is 120-140 ℃, and the curing time is 5-15 min; the molecular weight of the polyethyleneimine is 500-5000 daltons.
  2. 2. The preparation method of the silk fabric, according to claim 1, is characterized in that the volume fraction of the formic acid aqueous solution is 20% -40%, and the pretreatment comprises the step of treating the silk fabric with the formic acid aqueous solution at 15-55 ℃ for 1-2 min.
  3. 3. The preparation method of the sodium carbonate aqueous solution is characterized in that the mass percentage concentration of the sodium carbonate aqueous solution is 0.1% -1%, the drying temperature is 45-65 ℃, and the drying time is 50-70 min.
  4. 4. The preparation method according to claim 1, wherein the pretreatment silk is immersed in the polyphenol substance solution for treatment at a treatment temperature of 25-45 ℃ for 1-24 hours.
  5. 5. The preparation method according to claim 1, wherein the concentration of the silver nitrate aqueous solution is 0.5-3 mol/L, the concentration of the caffeic acid aqueous solution is 2-3 g/L, the concentration of the polyvinylpyrrolidone aqueous solution is 0.01-0.05 g/L, and the molecular weight of polyvinylpyrrolidone is 20000-200000 daltons.
  6. 6. The preparation method of the silver nanowire/polyethyleneimine dispersion liquid is characterized in that the concentration of the polyethyleneimine solution is 0.5-10 g/L, and the concentration of the silver nanowire in the silver nanowire/polyethyleneimine dispersion liquid is 8-12 mg/mL.
  7. 7. The preparation method according to claim 1, wherein when the polyphenol modified silk fabric is immersed in the silver nanowire/polyethyleneimine dispersion liquid for treatment, the immersion time is 2-5 times, the immersion temperature is 20-30 ℃, and the immersion time is 30-120 min.
  8. 8. A durable conductive silk fabric prepared according to the method of any one of claims 1-7.

Description

Durable conductive silk fabric and preparation method thereof Technical Field The invention belongs to the field of functional finishing of textiles, and particularly relates to a preparation method of durable conductive silk fabric and the durable conductive silk fabric prepared by the preparation method. Background In recent years, flexible wearable devices exhibit wide application prospects in the fields of personal exercise monitoring, health care, intelligent robots and the like. Conductive electronic textiles are the most popular category of flexible wearable devices currently under investigation. Compared with the rigid wearable device, the electronic textile is soft, comfortable and breathable, has strong fitting property with human body, is light and easy to carry, and is more friendly to human body compared with other flexible wearable devices. The conductive fiber/fabric is a component necessary in the preparation process of electronic textiles, and is usually prepared by modifying a carbon-based material (carbon nano tube and graphene), a metal conductive material (gold, silver and copper) or a conductive polymer material (polythiophene, polypyrrole and polyaniline) or a novel two-dimensional material Mxene in recent years onto the surface of a textile material or blending with spinning solution. Among them, the metal conductive material has the most excellent conductive performance compared with other materials, and the silver nano material is the type which is more studied. Silk is a natural animal fiber and has the characteristics of softness, toughness, good luster, light weight, air permeability, degradability, good biocompatibility and the like. Along with the development of scientific technology, people have deeper understanding on the structure and application of silk, silk materials gradually go out of the traditional textile field, and excellent potential application values are displayed in various fields such as biomedical treatment, flexible electronic devices and the like. Compared with conductive polymers and carbon materials, the nano silver has the effects of light weight, high conductivity and antibacterial effect, and is widely applied to the fields of electronic skin, biological monitoring, man-machine interaction, environmental monitoring and the like. For example, nano silver is deposited on silk fabric by adopting an in-situ reduction method of silver ammonia solution, so as to obtain the nano silver/silk fabric with durable antibacterial property (textile report, 2013,34 (8): 5). And compared with nano silver particles, the silver nanowires have the characteristic of high length-diameter ratio, and have better conductive effect. For example, the Chinese patent No. CN202010518803.1 discloses that the polyaniline/silver nanowire cotton fiber flexible capacitor electrode material is obtained by an impregnation method. The traditional impregnation method for preparing the electronic textile has the advantage of simple operation, but the biggest problem existing at present is that the washing fastness of the impregnated composite electronic textile is poor. This is mainly because simple impregnation does not improve the binding strength of the conductive material to the textile substrate, and the introduction of an adhesive is particularly important to solve this problem, but it is a challenge to ensure the flexibility and the hand of the textile while improving the binding strength. For example, according to the chinese invention patent CN201811280979.7, the surface of a base material is modified by polydopamine and polyethylenimine to obtain a modified base material, and then nano-fibers with a metal-organic framework are grown on the surface of the modified base material in situ, and are subjected to high-temperature carbonization treatment to obtain a high-conductivity sensor material, which is subjected to high-temperature carbonization treatment at 800-1200 ℃. The Chinese patent No. 202110038779.6 also carries out carbonization treatment on silk fabric to obtain conductive fibers, so that the original fibers are changed into carbon fibers, and some superior properties of the original fibers are lost. For example, in chinese patent CN202211114531.4, a polyphenol/polyethylenimine polymer is used as an adhesive layer on a textile substrate, and then a metal coating is prepared on the adhesive layer by electroless plating, so as to obtain conductive fibers, and improve the adhesion between the fibers and metal particles. But the formation of the coating with the metal layer affects the flexibility of the fiber or fabric. The chemical plating formulation contains more chemical substances, which may affect the performance of silk fiber. As another example, the silver nanowires are prepared by the Chinese patent No. CN202210553501.7, and are used for conducting finishing of cotton fabrics, so that the cotton fabrics with lower resistance are obtained. Silver nanowires are easily