Method for enhancing washing resistance of nano-silver antibacterial cotton fabric by surface modification of cotton fabric

A surface-enhanced, nano-silver technology, applied in plant fibers, textiles, papermaking, fiber treatment, etc., can solve the problems of poor washing resistance and achieve the effect of improving washing resistance and high safety

Active Publication Date: 2016-12-07
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unique properties of nano-materials, nano-silver has super permeability and activity, and its bactericidal performance is hundreds of times that of ordinary silver. In recent years, its application and research on textiles has become a hot spot, but the common problem of poor washing resistance , in order to solve this problem, this topic esterifies the carboxyl group of cysteine ​​hydrochloride with the hydroxyl group of cellulose to bond it to the surface of cotton fabric, and then impregnates the surface modified cotton fabric into nano-silver colloid In this process, the complexation of nano-silver and mercapto groups on the surface of modified cotton fabrics is used to obtain cotton fabrics with excellent antibacterial and washable properties.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Soak 0.5g cotton fabric in 0.5mol / L L-cysteine ​​hydrochloride solution for 5min, then place it in an oven and heat at 160°C for 5min, so that the carboxyl group of cysteine ​​hydrochloride and cellulose The hydroxyl group undergoes an esterification reaction to bond it to the surface of the cotton fabric. The cotton fabric is taken out, washed three times with 100ml of distilled water, and dried in an oven at 60°C.

[0016] 2) Pour the sodium citrate solution with a concentration of 0.001mol / L into the silver nitrate solution with a concentration of 0.005mol / L at one time, stir constantly to obtain a bright white stable nano-silver sol, and impregnate the modified cotton fabric obtained in the first step In the nano-silver sol for 5 minutes, fix the nano-silver through the complexation of mercapto groups, take it out and dry it at 60°C, wash it with 100ml distilled water, and then dry it in an oven at 60°C to obtain antibacterial cotton fabrics. The obtained nano-sil...

Embodiment 2

[0018] 1) Soak 0.5g cotton fabric in 0.5mol / L L-cysteine ​​hydrochloride solution for 5min, then place it in an oven and heat at 160°C for 5min, so that the carboxyl group of cysteine ​​hydrochloride and cellulose The hydroxyl group undergoes an esterification reaction to bond it to the surface of the cotton fabric. The cotton fabric is taken out, washed three times with 100ml of distilled water, and dried in an oven at 70°C.

[0019] 2) Pour the sodium citrate solution with a concentration of 0.001mol / L into the silver nitrate solution with a concentration of 0.005mol / L at one time, stir constantly to obtain a bright white stable nano-silver sol, and impregnate the modified cotton fabric obtained in the first step In the nano-silver sol for 7 minutes, fix the nano-silver through the complexation of mercapto groups, take it out and dry it at 60°C, wash it with 100ml distilled water, and then dry it in an oven at 60°C to obtain antibacterial cotton fabrics. The obtained nano-sil...

Embodiment 3

[0021] 1) Soak 1g of cotton fabric in 5mol / L L-cysteine ​​hydrochloride solution for 5min, then place in an oven and heat at 180°C for 5min, so that the carboxyl group of cysteine ​​hydrochloride and cellulose hydroxyl The esterification reaction bonds it to the surface of the cotton fabric. The cotton cloth is taken out, washed three times with 100 ml of distilled water, and dried in an oven at 80°C.

[0022] 2) Pour the sodium citrate solution with a concentration of 0.01mol / L into the silver nitrate solution with a concentration of 0.05mol / L at one time, stir constantly to obtain a bright white stable nano-silver sol, and soak the modified cotton fabric obtained in the first step In the nano-silver sol for 10 minutes, fix the nano-silver through the complexation of mercapto groups, take it out and dry it at 80°C, wash it with 100ml distilled water, and then dry it in an oven at 80°C to obtain antibacterial cotton fabrics. The obtained nano-silver particles The diameter is 2...

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Abstract

The invention discloses a method for enhancing washing resistance of nano-silver antibacterial cotton fabric by surface modification of cotton fabric. The method comprises the following steps: Step 1, impregnating cotton fabric into a cysteine hydrochloride solution, heating to carry out an esterification reaction between carboxyl group of cysteine hydrochloride and hydroxyl group of cellulose, cleaning, and drying; and Step 2, impregnating the above modified cotton fabric into nano-silver sol, fixing nano-silver by complexation of mercapto group, drying, and cleaning to finally obtain the antibacterial cotton fabric. Particle size of nano-silver particles obtained is 20-60 nm. Sterilizing rates of escherichia coli and staphylococcus aureus both reach 100%. After 20 times of standard washing, sterilizing rate of escherichia coli and staphylococcus aureus is still maintained at 100%. The method of the invention has high safety to human body and is pollution-free to the environment. By the method, excellent performance of the cotton fabric is maintained. The method has practical application potential in antibacterial modification of cotton fabric.

Description

field of invention [0001] The invention relates to a method for enhancing the washability of nano-silver antibacterial cotton fabrics by modifying the surface of cotton fabrics with cysteine ​​hydrochloride, which belongs to the technical field of fabric treatment. technical background [0002] Microorganisms are a class of low-level organisms with small individual size and simple structure, mainly including bacteria, fungi, viruses, etc., which are generally difficult to observe with the naked eye. During people's daily wearing, human secretions and environmental pollutants will remain on the fabric, which provides rich nutrients and suitable breeding conditions for the growth of microorganisms, not only causing the fabric to change color, smell, and reduce physical and mechanical properties, etc. , It will cause bacterial infection of the human body, cause various diseases, and may even be life-threatening. Cotton fabric is a natural fiber and has many advantages, such as...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/342D06M11/83D06M101/06
CPCD06M11/83D06M13/342D06M2101/06
Inventor 刘向东张艳艳朱燕辉付飞亚
Owner ZHEJIANG SCI-TECH UNIV
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