CN1804203A

CN1804203A - Method for in-situ generating ultrafine silver particles in textile

Info

Publication number: CN1804203A
Application number: CN 200610049127
Authority: CN
Inventors: 陈建军; 李晔; 王亦彤; 姚奎鸿
Original assignee: Zhejiang Sci Tech University ZSTU
Current assignee: Zhejiang Sci Tech University ZSTU; Zhejiang University of Science and Technology ZUST
Priority date: 2006-01-17
Filing date: 2006-01-17
Publication date: 2006-07-19
Anticipated expiration: 2026-01-17
Also published as: CN100346028C

Abstract

The disclosed preparation method for ultramicro Ag+ in textile comprises: adsorbing Sn2+ on textile fiber surface to reduce the silver and realize the connection between silver and fiber; with the assistant of ultrasonic wave, dipping the treated textile into the ethanol-water solution of with dissolved AgNO3 to let silver grow on fiber surface at room temperature. This invention improves the dispersion and adhesion force of Ag+ in textile with simple process to enhance its prevention against electromagnetic radiation, thermal conduction and antibacterial property greatly.

Description

Method for in-situ generation of ultrafine silver particles in textile

Technical Field

The invention relates to a method for in-situ growing ultrafine silver particles in textile fibers by adopting an in-situ synthesis process, which is used for improving the performances of electromagnetic radiation resistance, heat conduction, antibiosis and the like of textiles.

Background

Electromagnetic radiation can cause serious damage to the nervous system, immune system, circulatory system, reproductive system, and other system functions of the human body. Therefore, the problem of protection against electromagnetic radiation is receiving increasing attention and attention, and the development of products for preventing electromagnetic radiation is imminent. At present, several main approaches for developing textiles preventing electromagnetic radiation are as follows: 1. blending and interweaving of metal fibers: the aim of preventing electromagnetic radiation is achieved by using thinner metal fibers and adopting a blending or interweaving method. At present, most of anti-electromagnetic radiation products belong to the type, take reflection as a main form, can have certain effect, but the fabric hand feeling is poor, such as stainless steel containing fabric. 2. Coating the surface of the fabric: the conductive coating, such as silver, copper, nickel and carbon conductive coatings, is coated on the surface of the fabric by utilizing an after-finishing coating technology, so that the fabric has certain effects, the coating treatment process is simple, and the influence on the wearability of the fabric is large. 3. The plating technology comprises the following steps: the method of metal sputtering, vacuum metal aluminum plating, electroplating or chemical plating is utilized to cover a conductive film on the surface of the fabric, so that a good electromagnetic radiation resistant effect can be obtained, and the defects of high cost and poor durability are overcome. Such as an aluminum plated fabric, a silver plated fabric on one or both sides.

In addition, the ultrafine silver particles can also play roles in heat conduction, antibiosis and the like in the fabric.

Disclosure of Invention

The object of the present invention is to provide: the ultrafine silver particles are generated in situ in textile fibers, and the dispersibility and the adhesive force of the silver particles in the textile are improved, so that the textile has excellent electromagnetic radiation resistance, heat conduction, antibacterial property and the like.

The technical scheme adopted by the invention is as follows:

firstly, fabric fibers are treated to remove dirt on the surfaces of the fibers, then the fabric fibers are cleaned by water and dried, and then the fabric is placed in 10-15 g/l SnCl₂In aqueous solution of Sn²⁺Adsorbing the fiber on the surface of the textile and then drying; adding silver nitrate into the mixed solution of ethanol and water, and adsorbing Sn under the action of ultrasonic wave²⁺The fabric is soaked in a mixed solution of ethanol and water dissolved with silver nitrate, the reaction temperature is room temperature, and silver grows and deposits on the surface of the fiberBy using Sn²⁺And reducing the metallic silver ions to realize the linkage of the metallic silver and the fiber.

Concentration of ethanol in the mixed solution of ethanol and water: large silver particles are separated out in 80-95% solution.

The concentration range of silver nitrate is [ Ag +]The concentration range of (A) is 3 to 9 x 10^-3M。

The ratio of ethanol to water has a great influence on the particle size of the silver particles. The higher the water content, the poorer the adsorption on the surface and the larger the silver particles formed in the solution. The water content exceeds 20 percent, and large silver particles are separated out.

Adsorbing a layer of Sn on the surface of the fiber²⁺It is placed in high-concentration silver nitrate, Sn²⁺Reduction of Ag⁺The reaction is only limited on the surface of the fiber, so that impurity silver particles in the solution are avoided; on the other hand, the reduced silver particles cannot grow excessively, Sn²⁺The reaction is stopped after the consumption, the uniformity of the crystal nucleus is ensured, and the process has excellent controllability.

The ultrasonic wave plays an important role in the formation process of the silver crystal nucleus, the particle size of the crystal nucleus is increased, the stability of the crystal nucleus is improved, and meanwhile, the binding force of the crystal nucleus and a substrate is improved. The energy of the ultrasonic wave can cause chemical reactions such as oxidation, reduction, decomposition and the like, which promote the chemical reactions to be accelerated

Under the action of ultrasonic wave, SnCl₂The treated fibers were reacted with silver nitrate:

compared with the background technology, the invention has the beneficial effects that:

(1) the silver particles are generated in situ, so the particle size is small, the dispersibility is good, and the adhesive force on the fabric is strong;

(2) the treatment process is simple and convenient, and the fabric can be basically processed on the original various textile printing and dyeing equipment;

(3) has better anti-electromagnetic radiation effect;

(4) and the antibacterial and heat-conducting properties of the textile can be improved.

Detailed Description

An embodiment of in-situ generation of ultrafine silver particles in textile fibers by an in-situ process in the fibers by an ultrasonic and stirring method:

example 1:

firstly, treating fabric fibers with 2% sodium hydroxide solution to remove dirt on the surfaces of the fabrics, then cleaning the fabrics with water, drying the fabrics, and then placing the fabrics in 10g/l SnCl₂In aqueous solution of Sn²⁺Adsorbing onto the fiber surface of the textile, oven drying, soaking the surface-treated fabric in mixed solution of ethanol and water (water content of 5%) containing silver nitrate at concentration of 3 × 10^-3And M. The reaction temperature is room temperature, and silver grows and deposits on the surface of the fiber.

Example 2:

firstly, treating fabric fibers with 2% sodium hydroxide solution to remove dirt on the surfaces of the fabrics, then cleaning the fabrics with water, drying the fabrics, and then placing the fabrics in 15g/l SnCl₂In aqueous solution of Sn²⁺Adsorbing to the surface of the fiber of the textile, drying, and adsorbing Sn under the action of ultrasonic wave²⁺The fabric is immersed in a mixed solution of ethanol containing silver nitrate and water (the content of water is 5 percent), the reaction temperature is room temperature, silver grows and deposits on the surface of the fiber, and Sn is utilized²⁺And reducing the metal ions to realize the linkage of the metal and the fiber. Silver nitrate was then added. The silver nitrate concentration was 9X 10^-3M。

Example 3:

firstly, treating fabric fibers with 2% sodium hydroxide solution to remove dirt on the surfaces of the fabrics, then cleaning the fabrics with water, drying the fabrics, and then placing the fabrics in 12g/l SnCl₂In aqueous solution of Sn²⁺Adsorbing to the surface of the fiber of the textile, drying, and adsorbing Sn under the action of ultrasonic wave²⁺The fabric is immersed in a mixed solution of ethanol containing silver nitrate and water (the water content is 20%), the reaction temperature is room temperature, and silver grows on the surface of the fiberLong deposition by Sn²⁺And reducing the metal ions to realize the linkage of the metal and the fiber. Silver nitrate was then added. The concentration of silver nitrate is 6X 10^-3M。

The textile may be cotton, polyester, acrylic, etc.

Claims

1. A method for generating ultra-micro silver particles in situ in a textile is characterized in that: firstly, fabric fibers are treated to remove dirt on the surfaces of the fibers, then the fabric fibers are cleaned by water and dried, and then the fabric is placed in 10-15 g/l SnCl₂In aqueous solution of Sn²⁺Adsorbing the fiber on the surface of the textile and then drying; adding silver nitrate into the mixed solution of ethanol and water, and adsorbing Sn under the action of ultrasonic wave²⁺The fabric is soaked in a mixed solution of ethanol and water dissolved with silver nitrate, the reaction temperature is room temperature, silver grows and deposits on the surface of the fiber, and Sn is utilized²⁺And reducing the metallic silver ions to realize the linkage of the metallic silver and the fiber.

2. A method for in situ generation of ultra-micro silver particles in a textile according to claim 1, wherein the concentration of ethanol in the mixture of ethanol and water is: large silver particles are separated out in 80-95% solution.

3. A method of generating ultra-fine silver particles in situ in a textile according to claim 1, wherein: the concentration range of silver nitrate is [ Ag +]The concentration range of (A) is 3 to 9 x 10^-3M。