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Method for preparing nanometer silver composite sol

A technology of composite sol and nano-composite particles, which is applied in the field of sol preparation, can solve the problems of complex process, affect the performance of nano-silver sol, and high requirements, and achieve the effects of simple process, low cost and good effect.

Inactive Publication Date: 2009-08-19
北京首纳东方科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wherein the direct reduction method etc. will introduce protective agent to prevent the agglomeration of nano-silver sol, and wherein the residual chemical surfactant has chemical toxicity, has influenced the performance of nano-silver sol; Such as patent CN200510062319.8 requires reductant solution in 0- Freezing at 8°C for more than 0.5 hours requires high requirements and a complicated process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) The raw materials in the present embodiment are as follows, in terms of weight percent concentration:

[0047] A. 0.2% silver nitrate solution 50ml

[0048] E. 0.1% polyvinylpyrrolidone 70ml

[0049] F.0.01% hydrazine hydrate 200ml

[0050] G. Isopropanol 10ml

[0051] In the present embodiment, silver nitrate, surfactant, the mol ratio of hydrazine hydrate is: 1: 0.266: 0.7;

[0052] (2) Prepare the raw material A described in the step (1), then add E at normal temperature, then add pure water to make the solution volume reach 200 milliliters, finally add F, add hydrazine hydrate solution under slow stirring state, The stirring speed is: 500 revolutions per minute; stop adding the hydrazine hydrate solution when the pH value of the solution reaches 6.5. Then the mixed solution was continued to be stirred for 30 minutes and then stopped to obtain nano-silver particles;

[0053] (3) After placing the reaction product in the above step (2), i.e., silver nanoparti...

Embodiment 2

[0056] (1) The raw materials in the present embodiment are as follows, in terms of weight percent concentration:

[0057] A. 0.2% silver nitrate solution 50ml

[0058] B. 0.01% zinc nitrate solution 10ml

[0059] E. 0.1% sodium lauryl sulfate solution 70 ml

[0060] F.0.01% hydrazine hydrate 200ml

[0061] G. Absolute ethanol 10ml

[0062] In the present embodiment, silver nitrate, zinc nitrate, surfactant, the mol ratio of hydrazine hydrate are: 1: 0.009: 0.266: 0.7;

[0063] (2) Mix the raw materials A and B described in step (1) at room temperature, then add E, then add pure water to make the volume of the solution reach 200 ml, finally add F, and add it under slow stirring Hydrazine hydrate solution, the stirring speed is: 500 revolutions per minute; stop adding the hydrazine hydrate solution when the pH value of the solution reaches 7.0, then continue to stir the mixed solution for 20 minutes and then stop to obtain nanocomposite particles comprising nano silver;

[00...

Embodiment 3

[0067] (1) The raw materials in the present embodiment are as follows, in terms of weight percent concentration:

[0068] A. 0.2% silver nitrate solution 50ml

[0069] B. 0.01% zinc nitrate solution 10ml

[0070] C. 0.001% ferric nitrate solution 10 ml

[0071] E. 0.1% polyvinylpyrrolidone 50 ml, 0.1% sodium lauryl sulfate solution 20 ml

[0072] F.0.01% hydrazine hydrate 200ml

[0073] G. Isopropanol 10ml

[0074] In the present embodiment, silver nitrate, zinc nitrate, ferric nitrate, surfactant, the mol ratio of hydrazine hydrate are: 1: 0.009: 0.007: 0.266: 0.7;

[0075] (2) Mix the raw materials A, B, and C described in step (1) at room temperature, then add E, then add pure water to make the solution volume reach 200 ml, finally add F, and slowly stir Add the hydrazine hydrate solution at the bottom, and the stirring speed is: 2000 revolutions per minute; when the pH value of the solution reaches 6.5, stop adding the hydrazine hydrate solution, then continue to stir...

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Abstract

The invention relates to a nano-silver composite sol and a preparation method thereof. The raw materials of the sol include silver nitrate solution, zinc nitrate solution, ferric nitrate solution, copper nitrate solution, surfactant, hydrazine hydrate and a dispersant. When preparing the composite sol, first mix the silver nitrate solution, zinc nitrate solution, iron nitrate solution, and copper nitrate solution, then add the surfactant solution, and finally add hydrazine hydrate and stir slowly. Drying under high temperature, and finally obtain nanocomposite powder composed of silver, zinc and copper and other components, and then after standing, separating, washing, and redispersing into the solvent to obtain a composite sol with a particle size of 10-100nm, the particle size of the sol is uniform , the raw material is easy to obtain, the process is simple, the cost is low, the industrial production is easy to realize, and the application is very extensive.

Description

technical field [0001] The invention relates to a method for preparing a sol, in particular to a method for preparing a nano-silver composite sol. Background technique [0002] Metallic silver is a safe and effective antibacterial substance. The antibacterial or bactericidal effect of silver particles is highly enhanced when the size of the silver particles is in the nanometer scale. Due to its wide range of characteristics, high efficiency and environmental protection, and no side effects, nano silver has attracted great attention in the scientific and industrial fields at home and abroad. In addition to silver, metals such as copper and zinc are also effective antibacterial substances. The application of nano-composite silver-zinc-copper powder is more effective and widely used due to the coordinated performance of its multiple antibacterial components. In addition, silver-containing nanocomposite sols have high application value in some special conductive materials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 宣公王贵祥咸才军孔志平邢颖
Owner 北京首纳东方科技有限公司
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