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Gold-silver composite nano chain antibacterial agent synthesizing method

A technology of gold-silver composite and synthesis method, which is applied in the field of environmental science, can solve problems such as gold-silver nano-composite chain materials that have not yet been reported, and achieve the effects of neat and unified structure, good antibacterial effect, and simple process

Inactive Publication Date: 2015-04-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above synthesis, most of the obtained products are nanoparticles or nanorod com

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 0.02g polyacrylamide to 20mL0.01mol / L AgNO 3 In the solution, use ammonia water to adjust the pH of the system to 10, drop vitamin C solution into the reaction solution under mechanical stirring conditions as a reducing agent until no precipitation occurs, and age the solution at room temperature for 1 hour, centrifuge at high speed, wash, Elemental silver nanoparticle chains are obtained.

[0022] The prepared silver nanochains were added to a beaker together with 0.05 mL of thioglycolic acid and 10 mL of absolute ethanol. After ultrasonic treatment for 5 minutes, they were separated by high-speed centrifugation to obtain silver nanochains whose surface was treated with thioglycolic acid. Add the surface-treated Ag nanoparticle chains into the beaker, and add 20 mL of deionized water to disperse. Will add 7mL0.01mol / L HAuCl respectively 4 solution and 5mL hydrazine hydrate (N 2 h 4 ·H 2 (2, 30wt%) after two test tubes are sealed with collodion film, be inverte...

Embodiment 2

[0024] Add 0.02g polymethylcellulose to 20mL0.01mol / L AgNO 3 In the solution, use ammonia water to adjust the pH of the system to 10, drop vitamin C solution into the reaction solution under mechanical stirring conditions as a reducing agent until no precipitation occurs, and age the solution at room temperature for 1 hour, centrifuge at high speed, wash, Obtain elemental silver nanochains.

[0025] The prepared silver nanochains were added to a beaker together with 0.5mL thioglycolic acid and 10mL absolute ethanol. After ultrasonic treatment for 5 minutes, they were centrifuged at high speed to obtain silver nanochains whose surface was treated with thioglycolic acid. Add the surface-treated Ag nanochains into the beaker, and add 20 mL of deionized water to disperse. Will add 8mL0.01mol / L HAuCl respectively 4 solution and 6mL hydrazine hydrate (N 2 h 4 ·H 2 (2, 30wt%) After two test tubes of 30wt%) seal with egg film, be inverted in the beaker that is filled with silver ...

Embodiment 3

[0027] Add 0.02g sodium polyacrylate to 20mL0.01mol / L AgNO 3 In the solution, use ammonia water to adjust the pH of the system to 10, drop vitamin C solution into the reaction solution under mechanical stirring conditions as a reducing agent until no precipitation occurs, and age the solution at room temperature for 1 hour, centrifuge at high speed, wash, Obtain elemental silver nanochains.

[0028]The prepared silver nanochains were added to a beaker together with 0.5mL thioglycolic acid and 10mL absolute ethanol. After ultrasonic treatment for 5 minutes, they were centrifuged at high speed to obtain silver nanochains whose surface was treated with thioglycolic acid. Add the surface-treated Ag nanochains into the beaker, and add 20 mL of deionized water to disperse. Will add 6mL0.01mol / L HAuCl respectively 4 solution and 5mL hydrazine hydrate (N 2 h 4 ·H 2 (2, 30wt%) after two test tubes are sealed with swim bladder, be inverted in the beaker that is filled with silver n...

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Abstract

The invention relates to a cold-silver composite nano chain antibacterial agent synthesizing method. The method includes the steps: (1) adding a template agent into AgNO3 solution, adjusting system pH value to be 10, dripping a reducing agent into the reaction solution under the condition of stirring, and subjecting the reaction solution to ageing for 1-5h at the room temperature to obtain a Ag nano-particle chain; (2) adding the Ag nano-particle chain into a reactor, using a dispersing agent for dispersing in deionized water, placing a HAuC14 solution filled test tube with a semipermeable membrane seal and a hydrazine hydrate solution filled test tube with a semipermeable membrane seal in the Ag nano-particle chain contained reactor upside down, placing the whole system in an ultrasonic disperser for ultrasonic treatment for 5-10min, subjecting the obtained solution to centrifugal separation, washing for several times, and naturally drying to obtain a Au/Ag composite nano chain. Compared with the prior art, the cold-silver composite nano chain antibacterial agent synthesizing method has the advantages of low preparation cost, technical simplicity, avoidance of pollution, high dispersibility and regular structure of products and the like.

Description

technical field [0001] The invention belongs to the field of environmental science, and in particular relates to a method for synthesizing a gold-silver composite nano-chain antibacterial agent. Background technique [0002] Nano-silver is an emerging functional material with high specific surface area and surface activity. It is widely used as catalyst material, antistatic material, low-temperature superconducting material, electronic paste and biosensor material. In addition, nano-silver also has functions such as antibacterial, deodorizing and absorbing some ultraviolet rays, so it can be used in the pharmaceutical industry and cosmetics industry. Adding a small amount of nano-silver to chemical fiber can change some properties of chemical fiber and endow it with strong bactericidal ability. The metal elements used in existing inorganic bactericides are mainly silver, copper, zinc, etc., which are safer for the human body, among which silver has the strongest bactericida...

Claims

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Application Information

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IPC IPC(8): B22F9/24A01N59/16A01P1/00B82Y30/00B82Y40/00
Inventor 李光明王书玉朱昊辰范建伟贺文智戴亮
Owner TONGJI UNIV
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