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A kind of method that carbazide complexes silver nitrate to prepare antibacterial fabric

A technology of silver nitrate and carbazide, which is used in textiles and papermaking, carbon fiber, biochemical fiber treatment, etc., can solve the problems of long process flow, low sterilization efficiency and high water resource requirements of reduction method, so as to improve sterilization efficiency and reduce silver The effect of high dosage and sterilization efficiency

Active Publication Date: 2018-10-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reduction method has a long process flow; multiple washings are required, the water consumption is large, and the water resource requirements are high; light-shielding, vacuum and other processes are used, and the equipment requirements are high; and the silver particles are mainly distributed on the outer surface and pores of the fabric in agglomerated form. , the loaded silver particles are relatively large, and the bactericidal efficiency is not high
[0008] Nano silver at a concentration of 30×10 -6 When , it has good antibacterial activity, but there is potential cytotoxicity; at 3×10- 6 concentration, cytotoxicity grade 2

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of silver nitrate-carbazide complex solution: Weigh 17 g of silver nitrate and 6.75 g of carbazide and dissolve them in distilled water to obtain 100 liters of silver ammonium nitrate complex solution. Among them, the molar ratio of silver nitrate to carbazide is 4:3, and the mass concentration of Ag ions in the prepared aqueous solution is about 0.01%.

[0030] (2) Soaking and drying carbon fiber (fabric) with silver ions: Wash the carbon fiber (fabric) after carbonization and activation with distilled water, dry it, and let it cool. Use silver nitrate-carbazide complex solution with a Ag ion mass concentration of about 0.01% and a molar ratio of 4:3 to oscillate at room temperature and soak the carbon fiber (fabric) for 6 hours; The ratio of the mixed liquid is 1Kg / liter; after soaking, filter and dry in a ventilated environment and a light-proof environment; dry in an electric blast drying oven at 30°C to constant weight, and remove water and crystal ...

Embodiment 2

[0035] (1) Preparation of silver nitrate-carbazide complex solution: Weigh 17 g of silver nitrate and 6.75 g of carbazide and dissolve them in distilled water to obtain 18 liters of silver ammonium nitrate complex solution. Among them, the molar ratio of silver nitrate to carbazide is 4:3, and the mass concentration of Ag ions in the prepared aqueous solution is about 0.6%.

[0036] (2) Soaking and drying carbon fiber (fabric) with silver ions: Wash the carbon fiber (fabric) after carbonization and activation with distilled water, dry it, and let it cool. Use the silver nitrate-carbazide complex solution with a Ag ion mass concentration of about 0.6% and a molar ratio of 4:3 to oscillate at room temperature and soak the carbon fiber (fabric) for 24 hours; The ratio of the mixed liquid is 1Kg / liter; after soaking, filter and dry in a ventilated environment and a light-proof environment; dry in an electric blast drying oven at 70°C to constant weight, and remove water and crysta...

Embodiment 3

[0041] (1) Preparation of silver nitrate-carbazide complex solution: Weigh 17 g of silver nitrate and 3.75 g of carbazide and dissolve them in distilled water to obtain 18 liters of silver ammonium nitrate complex solution. Among them, the molar ratio of silver nitrate to carbazide is 12:5, and the mass concentration of Ag ions in the prepared aqueous solution is about 0.6%.

[0042] (2) Soaking and drying carbon fiber (fabric) with silver ions: Wash the carbon fiber (fabric) after carbonization and activation with distilled water, dry it, and let it cool. Use the silver nitrate-carbazide complex solution with a Ag ion mass concentration of about 0.6% and a molar ratio of 12:5 to oscillate at room temperature and soak the carbon fiber (fabric) for 12 hours; The ratio of the mixed solution is 0.25Kg / L; after soaking, filter and dry in a ventilated environment and a light-proof environment; dry in a hot air drying cylinder at 60°C to constant weight, and remove water and crystal...

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Abstract

The invention relates to a method for preparing anti-microbial fabrics through complexing of carbazide and silver nitrate. According to the method, carbon fibers (fabrics) are infiltrated by virtue of a silver nitrate and carbazide complex solution and are subjected to pyrolysis and reduction, so as to obtain high-stability carbon fiber (fabric) surface adsorbed nano-silver. The method comprises the following steps: firstly preparing the silver nitrate and carbazide complex solution, wherein the molar ratio of silver nitrate to carbazide is 12 to (5-9), and the Ag ion mass concentration is 0.01%-0.6%; soaking the fibers (fabrics) into the complex solution in a proportion of 0.25Kg / L-1Kg / L for 6-24 hours; maintaining the temperature at 150-360 DEG C for 0.5-6 hours under the protection of circulating nitrogen, and carrying out pyrolysis; and washing with clean water, and drying, so as to obtain the nano-silver, wherein the particle size of the nano-silver is 10nm-60nm, and the amount of supported silver is 0.01wt%-0.4wt%. The method has the beneficial effects that the technical process is shortened, the reaction temperature is decreased, formed nano-Ag particles are dispersed, the sterilization efficiency of silver-supported carbon fibers (fabrics) is improved, and the use amount of silver is reduced.

Description

technical field [0001] The present invention relates to a method for carrying silver on carbon fiber (fabric). It uses silver nitrate and carbazide complex solution, then impregnates carbon fiber (fabric), decomposes and reduces by heating, and uses the reaction heat of silver nitrate and carbazide complex to obtain highly stable carbon fiber (fabric) ) surface adsorption of nano-silver, for the preparation of high-efficiency silver-based antibacterial fabrics and other aspects. technical background [0002] The invention belongs to the silver-carrying process treatment of silver-based antibacterial agent fabrics. [0003] Textiles are one of the essential products for human life, and they are closely related to people's daily life. However, because most textiles have strong hygroscopicity and large specific surface area, they are very easy to become a place for the growth and reproduction of various microorganisms. Textiles that breed bacteria or other microorganisms wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/83D06M101/40
CPCD06M11/83D06M16/00D06M2101/40
Inventor 罗丰华罗弘瑞吴若晴牟楠
Owner CENT SOUTH UNIV