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Low-temperature pyrolysis and reduction preparation method for silver-series antibacterial fabric products

A low-temperature pyrolysis and article technology, which is used in textiles and papermaking, fabric surface trimming, heating/cooling fabrics, etc., can solve the problems of long process flow, low sterilization efficiency, and high water resource requirements in the reduction method, and improve the sterilization efficiency. , reducing the amount of silver, the effect of high sterilization efficiency

Active Publication Date: 2017-02-22
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
[0009] 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-citric acid complex solution: Weigh 17 g of silver nitrate and 6.4 g of citric acid, dissolve them in distilled water, and obtain 100 liters of silver ammonium nitrate complex solution. Among them, the molar ratio of silver nitrate to citric acid is 3:1, 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-citric acid complex solution with a Ag ion mass concentration of about 0.01% and a molar ratio of 3:1 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 40°C to constant weight, and remove water and cry...

Embodiment 2

[0035] (1) Preparation of silver nitrate-citric acid complex solution: Weigh 17 g of silver nitrate and 6.4 g of citric acid 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 citric acid is 3:1, 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. Shake the silver nitrate-citric acid complex solution with a Ag ion mass concentration of about 0.6% at room temperature and soak the carbon fiber (fabric) for 24 hours; the ratio of the carbon fiber (fabric) to the complex solution during soaking is 1Kg / After soaking, filter and dry in a ventilated and light-proof environment; dry in an electric blast drying oven at 90°C to constant weight to remove water and crystal w...

Embodiment 3

[0041] (1) Preparation of silver nitrate-citric acid complex solution: Weigh 17 g of silver nitrate and 6.0 g of citric acid 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 citric acid is 18:5.5, 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 silver nitrate-citric acid complex solution with a Ag ion mass concentration of about 0.6% and a molar ratio of 18:5.5 to oscillate at room temperature and soak the carbon fiber (fabric) for 12 hours; The ratio of the mixed liquid 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 80°C to constant weight, and remove water and cr...

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Abstract

The invention relates to a low-temperature pyrolysis and reduction preparation method for silver-series antibacterial fabric products. Carbon fibers (fabric) are infiltrated in a silver nitrate-citric acid complexing solution, and high-stability carbon-fiber (fabric) surface adsorbed nano silver is obtained after pyrolysis and reduction. The low-temperature pyrolysis and reduction preparation method includes preparing the silver nitrate-citric acid complexing solution, wherein the mole ratio of the silver nitrate-citric acid complexing solution is 18: (5-6), and the quality concentration of Ag ions is 0.01-0.6%; soaking the carbon fibers (fabric) in the complexing solution for 6-24 hours, and drying the carbon fibers (fabric) at the temperature of 40-90 DEG C, wherein the ratio of the carbon fibers (fabric) to the complexing solution is 0.25-1Kg / L; preserving the heat at 120-200 DEG C for 0.5-6 hours under protection of cyclic nitrogen to achieve pyrolysis, and performing drying after water washing to obtain nano silver, wherein the grain diameter of the nano silver is 10-60nm, and silver loading quantity is 0.01-0.5wt.%. The low-temperature pyrolysis and reduction preparation method has the advantages that the technological process is shortened, reaction temperature is reduced, sterilization efficiency of the silver-loaded carbon fibers (fabric) is improved, and silver consumption is lowered.

Description

technical field [0001] The present invention relates to a method for carrying silver on carbon fiber (fabric). It uses silver nitrate and citric acid complex solution, then impregnates carbon fiber (fabric), decomposes and reduces by heating, and uses the reaction heat of silver nitrate and citric acid 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. [0002] technical background [0003] The invention belongs to the silver-carrying process treatment of silver-based antibacterial agent fabrics. [0004] 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 micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D06C7/00
CPCD06C7/00D06M11/83D06M16/00D06M2101/40
Inventor 罗丰华吴子恺罗弘瑞牟楠
Owner CENT SOUTH UNIV