Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of low-temperature pyrolysis reduction preparation method of silver-based antibacterial fabrics

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

Active Publication Date: 2018-09-11
CENT SOUTH UNIV
View PDF4 Cites 0 Cited by
  • 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

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of silver nitrate-citric acid complex solution: Weigh 17g silver nitrate and 6.4g citric acid, 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 citric acid is 3:1, and the mass concentration of Ag ions in the prepared aqueous solution is about 0.01%.

[0029] (2) Silver ion soaking and drying carbon fiber (fabric): The carbon fiber (fabric) after carbonization and activation is washed with distilled water, dried, and allowed to cool. Use silver nitrate-citric acid complex solution with Ag ion mass concentration of about 0.01% and molar ratio of 3:1 at room temperature to immerse carbon fiber (fabric) for 6 hours; The ratio of the mixed solution is 1Kg / liter; after soaking, it is filtered and dried in a ventilated and dark environment; in an electric blast drying box, dried to constant weight at 40°C to remove water and crystal water.

[0030] (3) Thermal de...

Embodiment 2

[0034] (1) Preparation of silver nitrate-citric acid complexing solution: Weigh 17g silver nitrate and 6.4g citric acid, and dissolve them in distilled water to obtain 18 liters of silver ammonium nitrate complexing 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%.

[0035] (2) Silver ion soaking and drying carbon fiber (fabric): The carbon fiber (fabric) after carbonization and activation is washed with distilled water, dried, and allowed to cool. The carbon fiber (fabric) was immersed in a silver nitrate-citric acid complex solution with an Ag ion mass concentration of about 0.6% at room temperature. The immersion time was 24 hours; the ratio of carbon fiber (fabric) to the complex solution was 1Kg / L; After soaking, filter to dry in a ventilated and dark environment; dry in an electric blast drying box at 90 ℃ to constant weight to remove water and crystal water. ...

Embodiment 3

[0040] (1) Preparation of silver nitrate-citric acid complexing solution: Weigh 17g silver nitrate and 6.0g citric acid, and dissolve them with distilled water to obtain 18 liters of silver ammonium nitrate complexing 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%.

[0041] (2) Silver ion soaking and drying carbon fiber (fabric): The carbon fiber (fabric) after carbonization and activation is washed with distilled water, dried, and allowed to cool. The silver nitrate-citric acid complex solution with Ag ion mass concentration of about 0.6% and molar ratio of 18:5.5 was used to oscillate at room temperature to soak carbon fiber (fabric) for 12 hours; The ratio of the mixed solution is 0.25Kg / liter; after soaking, it is filtered and dried in a ventilated and dark environment; dried to constant weight in a hot air drying cylinder at 80°C to remove water and crystal...

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
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

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 invention relates to a method for loading silver carbon fiber (fabric). It is through the silver nitrate and citric acid complex solution, and then impregnated carbon fiber (fabric), after heating decomposition and reduction, using the reaction heat of silver nitrate and citric acid complex to obtain high stability carbon fiber (fabric ) Surface adsorption of nano-silver, used in the preparation of high-efficiency silver-based antibacterial fabrics. technical background [0002] The invention belongs to the silver-carrying process treatment of silver antibacterial agent fabrics. [0003] Textile is one of the indispensable products in human life, and it is closely related to people's daily life. However, because most textiles themselves have strong moisture absorption properties and a large specific surface area, they can easily become places for the growth and reproduction of various microorganisms. Textiles that grow bacteria or other microorganisms ...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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