Method for preparing nano-silver antibacterial cotton fabric by self-reduction

A technology of antibacterial cotton and nano-silver, which is applied in the field of antibacterial cotton fabric preparation and self-reduction preparation of nano-silver antibacterial cotton fabric, which can solve the problems of low preparation rate, waste, and fast preparation speed, and achieve the effect of green technology

Inactive Publication Date: 2018-11-09
ZHEJIANG ACAD OF SCI & TECH FOR INSPECTION & QUARANTINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process of preparing nano-silver antibacterial fabrics is relatively complicated. Silver ions are reduced to nano-silver through chemical reactions. The main preparation methods include fabric padding with silver nitrate solution-baking method and adding fabric and reducing agent to silver nitrate solution to react for a certain period of time. Natural drying, both methods need to use reducing agents such as hydrosulfite, ascorbic acid, dopamine, etc., the former has a fast preparation rate, but the utilization rate of silver ions is low, so a higher concentration silver nitrate solution is needed, and nano-silver is easy to gather into a relatively low silver nitrate solution. Large-sized particles, the latter has a high utilization rate of silver ions, but the preparation rate is low; industrial in-situ reduction to prepare nano-silver needs to add reducing agents and adsorbents, and the unreacted reducing agents and adsorbents will cause a certain amount of waste and waste. Pollution

Method used

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  • Method for preparing nano-silver antibacterial cotton fabric by self-reduction
  • Method for preparing nano-silver antibacterial cotton fabric by self-reduction
  • Method for preparing nano-silver antibacterial cotton fabric by self-reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The pretreated cotton fabrics were immersed in silver nitrate solutions of 0.1mmol / L, 0.3mmol / L, 0.5mmol / L 1mmol / L, 1.5mmol / L and 2mmol / L respectively, the bath ratio was 1:50, and then After soaking for 60 minutes at a constant temperature of 85°C, take it out, wash it in clean water, and stir it with an overhead stirrer at a speed of 300r / min at room temperature for 5 minutes, repeat the stirring 3 times, and then dry it naturally.

[0025] Analysis of results:

[0026] Such as figure 1 Shown are the results of cold field emission scanning electron microscopy on the surface of antibacterial cotton fabrics obtained by self-reduction method. figure 1 a is untreated cotton fiber, figure 1 B is the fiber that 0.5mmol / L silver nitrate solution has processed, figure 1 c is the fiber treated with 2mmol / L silver nitrate solution. For untreated cotton fabrics, the fiber surface has the inherent longitudinal stripes of cotton fibers, while the fiber surface of the cotton fa...

Embodiment 2

[0030] Immerse the pretreated cotton fabric in 1.5mmol / L silver nitrate solution with a bath ratio of 1:50, and then under the temperature conditions of 25°C, 50°C, 70°C, 75°C, 80°C and 85°C respectively After soaking at a constant temperature for 60 minutes, take it out and wash it in clean water. At room temperature, stir it with an overhead stirrer at a speed of 300r / min for 5 minutes. Repeat the stirring 3 times and then dry it naturally.

[0031] Analysis of results:

[0032] Such as figure 2 As shown in b, when the temperature is higher than 85°C, the increase in temperature has little effect on the increase of silver element content, indicating that when the temperature reaches 85°C, the reduction of nano-silver tends to be saturated. Therefore, it can be known that the preparation of nano-antibacterial For cotton fabrics, the optimum reaction temperature is 85°C.

Embodiment 3

[0034] Immerse the pretreated cotton fabric in 1.5mmol / L silver nitrate solution under the condition of bath ratio 1:30, 1:50 and 1:70 respectively, after soaking at 85℃ for 60min, take it out and put it in clean water Cleaning, at room temperature, stir with an overhead stirrer at a speed of 300r / min for 5min, repeat the stirring for 3 times, and let it dry naturally.

[0035] Analysis of results:

[0036] Such as figure 2 As shown in c, when the bath ratio is higher than 1:50, the increase of the bath ratio has little effect on the silver content, indicating that when the bath ratio is 1:50, the reduction of nano-silver tends to be saturated. When preparing nano-antibacterial cotton fabrics by reduction method, the optimum bath ratio is 1:50.

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Abstract

The invention discloses a method for preparing a nano-silver antibacterial cotton fabric by self-reduction. The method comprises the following steps: pretreating a cotton fabric in a NaOH solution under the condition of a water bath, then immersing the pretreated cotton fabric in a silver nitrate solution, carrying out immersing under the condition of a constant temperature, taking the immersed cotton fabric out of the silver nitrate solution, placing the immersed cotton fabric in clear water, carrying out washing, repeatedly carrying out stirring with a top-mounted stirrer under the conditionof a normal temperature, and carrying out natural air-drying. According to the invention, nano-silver is prepared by utilizing the absorption action of a hydroxyl group and the reduction action of analdehyde group in cellulose fibers, and addition of a reducing agent and an absorbent in a conventional process is not needed, so the preparation method for the nano-silver antibacterial cotton fabric provided by the invention is relatively more environmentally-friendly and greener and is a simple process.

Description

technical field [0001] The present invention relates to a kind of method of antibacterial cotton fabric preparation field of antibacterial cotton fabric, be specifically related to a kind of method of self-reduction preparation nano-silver antibacterial cotton fabric. Background technique [0002] Nano-silver antibacterial fabrics are widely used in textiles, clothing, medical and other fields because of their excellent antibacterial properties, no drug resistance, no irritation to the skin, and no effect on the appearance of the fabric. At present, the process of preparing nano-silver antibacterial fabrics is relatively complicated. Silver ions are reduced to nano-silver through chemical reactions. The main preparation methods include fabric padding with silver nitrate solution-baking method and adding fabric and reducing agent to silver nitrate solution to react for a certain period of time. Natural drying, both methods need to use reducing agents such as hydrosulfite, asc...

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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IPC IPC(8): D06M11/83D06M11/38D06M101/06
CPCD06M11/38D06M11/83D06M16/00D06M2101/06
Inventor 吴俭俭谢维斌许成韬张焱
Owner ZHEJIANG ACAD OF SCI & TECH FOR INSPECTION & QUARANTINE
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