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Preparation method of nano-silver coating of chitosan modified fabric

A technology of chitosan modification and nano-silver, which is applied in textiles, papermaking, fiber treatment, etc., can solve the problem of high cost, achieve the effect of cheap price, lower production cost, and simple process

Active Publication Date: 2015-12-30
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it needs to use nano-silver with high cost as raw material
Therefore, the antibacterial properties of chitosan modified fabrics need to be further improved

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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  • Preparation method of nano-silver coating of chitosan modified fabric
  • Preparation method of nano-silver coating of chitosan modified fabric
  • Preparation method of nano-silver coating of chitosan modified fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take a 4cm×4cm cotton fabric, treat it with 0.5% NaOH solution at 60°C for 30min, rinse it with water, and dry it. The cotton fabric was dipped into 200 mL of 0.2% chitosan solution (chitosan was dissolved in 1% glacial acetic acid solution), heated and stirred at 60° C. for 60 min. Rinse in 0.5% NaOH aqueous solution for 30 minutes, rinse with clear water, and dry at 100° C. to obtain chitosan-modified cotton fabric. Immerse the chitosan-modified cotton fabric into 100mL of 0.08% silver nitrate solution, control the temperature of the water bath at 60°C and shake and stir for 30 minutes to make the fabric fully absorb silver ions, then add alkali to adjust the pH to 7-8, and react After 60 minutes, take it out for rinsing, and dry at 80° C. to obtain a yellow nano-silver cotton fabric. According to the American AATCC Test Method 100—1999 "Quantitative Test Method" to test the antibacterial performance of blank fabrics or nano-silver fabrics, the antibacterial rate aga...

Embodiment 2

[0028] Take a 4cm×4cm polyester fabric, treat it with 20% NaOH solution at 80°C for 60min, wash and dry it. This fabric is immersed in the chitosan finishing solution of 200mL (solvent is the glacial acetic acid aqueous solution of volume concentration 1%, solute is the chitosan of mass concentration 0.5%, the citric acid of 0.3%, the sodium acetate of 0.4%), 80 It was shaken in a water bath at ℃ for 120 minutes, pressed once, rinsed in 0.5% NaOH aqueous solution for 30 minutes, rinsed with water, and dried at 100 ℃ to obtain chitosan-modified polyester fabric. Immerse chitosan-modified polyester fabric into 100mL of 1% silver nitrate solution, shake and stir at 60°C for 90 minutes to make the fabric fully absorb silver ions, then add alkali to adjust the pH to 7-9, shake for 60 minutes, take out Rinse with clear water and dry at 80° C. to obtain a brown-yellow nano-silver polyester fabric. According to the American AATCC Test Method 100—1999 "Quantitative Test Method" to tes...

Embodiment 3

[0030]Take a 4cm×4cm polyester-cotton fabric, treat it with 5% NaOH solution at 80°C for 60min with a bath ratio of 1:20, wash and dry. This fabric is immersed in the chitosan solution of 200mL (solvent is the glacial acetic acid aqueous solution that volume concentration is 1%, solute is the chitosan of mass concentration 0.3%, the citric acid of 0.4%, the sodium acetate of 0.3%), 80 ℃ water bath shaking treatment for 120min, rolling treatment once, then rinsing in 0.5% NaOH aqueous solution for 30min, rinsing with clear water, and drying at 100℃ to obtain chitosan-modified polyester-cotton fabric. Immerse the chitosan-modified cotton fabric into 100mL of 0.15% silver nitrate solution, shake and stir in a water bath at 60°C for 30 minutes to make the fabric fully absorb silver ions, then add alkali to adjust the pH to 7-9, react for 60 minutes, and take out Rinse and dry at 80°C to obtain a yellow nano-silver polyester-cotton fabric. According to the American AATCC Test Meth...

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Abstract

The invention relates to a preparation method of a nano-silver coating of chitosan modified fabric. According to the preparation method, the nano-silver coating is formed on the chitosan modified fabric or textile through silver ion adsorption and in-situ reduction by amino groups and hydroxyl groups on the surface of chitosan under the condition that no reducing agent is added, the silver supporting capacity of the fabric reaches 0.1-200 mg Ag / m<2> and 1-50 mg Ag / g, and the sizes of nano-silver particles are 5-20 nm. The nano-silver particles are uniformly distributed in the fabric and has good dispersity and excellent antibacterial performance. The preparation method is simple in process, needs no reducing agent and is environment-friendly, low in cost and suitable for mass production. The prepared fabric provided with the nano-silver coating has broad application prospects in antibacterial textiles.

Description

technical field [0001] The invention relates to the field of preparation of nano-silver fabrics, in particular to a green preparation technology without adding reducing agent. Background technique [0002] As people's awareness of health and environmental protection continues to strengthen, while paying attention to the beauty and comfort of clothing, higher requirements are put forward for its health care function. As an inorganic antibacterial textile material, nano silver fabric is widely used in the field of textile and clothing because of its strong antibacterial ability, long-lasting effect and good safety. Existing nano-silver fabrics are mainly prepared through fabric finishing techniques, including physical methods and chemical methods. The physical method is to coat nano-silver on the fiber surface of the fabric through bonding technology to form a nano-silver coated fabric. The disadvantage of this method is that it needs to use nano-silver with high cost as raw...

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): D06M15/03D06M11/83
Inventor 彭俊军李伟李明熊文慧李雅琪窦砚鹏张馨
Owner WUHAN TEXTILE UNIV
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