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Novel preparation method for water-soluble nano silver on large scale

A technology for large-scale preparation and nano-silver is applied in the field of preparation of water-soluble nano-silver, which can solve the problems of affecting the use effect and dispersion effect, and achieve the effects of less energy consumption, good stability, and easy popularization and application.

Inactive Publication Date: 2011-10-19
上海赛瓦纳米银材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the invention, nano-silver powder is used as the base material, so its dispersion effect in water is greatly affected, and the large particle size will inevitably affect the use effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Example 1: Dissolve 0.01mol silver nitrate, 0.03mol sodium dodecylbenzenesulfonate, and 0.04mol polyvinylpyrrolidone in water with stirring at 40°C, adjust the pH value to 5-6, and when the solution system is clear and transparent for 10 minutes, put The reducing agent sodium hypophosphite 0.05mol is added into the reaction system, and then the stirring reaction is continued for 20 minutes.

example 2

[0017] Example 2: Dissolve 0.01mol silver nitrate, 0.01mol oleic acid, and 0.03mol polyvinylpyrrolidone in water with stirring at 50°C, adjust the pH value to 4-5, and when the solution system is clear and transparent for 15 minutes, add the reducing agent hydrazine hydrate 0.02mol Add it into the reaction system, and then continue stirring for 15 minutes.

example 3

[0018] Example 3: Dissolve 0.01mol silver acetate, 0.03mol cetyltrimethylammonium bromide, and 0.04mol polyethylene glycol 2000 in water with stirring at 40°C, and adjust the pH value to 7-8. When the solution system is clear and transparent After 10 minutes, add 0.05 mol of reducing agent glucose into the reaction system, and then continue stirring for 20 minutes to react.

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Abstract

The invention discloses a novel preparation method for water-soluble nano silver on a large scale. The preparation method comprises the following steps: stirring and dissolving silver salt, a protective agent and a stabilizing agent into a solvent (water) at 30-70DEG C; adjusting the pH value; when a solution system is clarified and vitrified for 5-20 minutes, adding a reducing agent into a reaction system; and continuously stirring and reacting for 5-30 minutes. The method disclosed by the invention has the advantages of low equipment requirement, simple technology, moderate reaction, short reaction time, high efficiency, low preparation cost and low energy consumption, is simple and convenient to operate and is suitable for large-scale production; and the product performance is good, the average particle diameter of the nano silver is less than 20nm, the blending concentration can be diluted by tap water, no harmful waste is generated, and the method conforms to the modern production requirements of environmentally-friendly production and energy conservation.

Description

Technical field [0001] The invention relates to a preparation method of water-soluble nano-silver, in particular to a preparation method of water-soluble nano-silver which is simple in preparation process, low in cost, stable in product, adjustable in acid and alkali, and suitable for large-scale production. Background technique [0002] Since the 1980s, nanotechnology has shown wide application potential in materials, information, energy, environment, life, military, manufacturing, etc., bringing huge opportunities for the development of high-tech and the improvement of human living standards in the 21st century. It has been found that nano-silver and the assembly system containing nano-silver particles exhibit many excellent properties in many aspects such as mechanics, electricity, heat, optics, catalysis, etc., especially its spectrally powerful bactericidal properties have attracted much attention. Modern medicine has confirmed that nano-silver has antibacterial functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 余运洋
Owner 上海赛瓦纳米银材料科技有限公司
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