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Preparation method of inorganic carried nanometer silver sol

A technology of nano-silver sol and inorganic substances, which is applied in the field of preparation of nano-silver sol, can solve the problems of unstable performance of nano-silver sol and inconvenient transportation of nano-silver sol, and achieve the effect of simple preparation method

Inactive Publication Date: 2008-04-30
上海华实纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the performance of high-concentration nano-silver sol is very unstable, so nano-silver sol is very inconvenient in practical application and transportation.

Method used

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  • Preparation method of inorganic carried nanometer silver sol
  • Preparation method of inorganic carried nanometer silver sol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) dissolving sodium borohydride in deionized water to prepare an aqueous solution of sodium borohydride with a weight concentration of 0.1%, and freezing it at 0° C. for 2 hours;

[0019] (2) Take the nano-silica powder, prepare a 1% silica powder aqueous solution with deionized water, add 0.1% sodium hexametaphosphate of the silica powder aqueous solution weight, and stir for 1 hour Ultrafiltration to obtain a light blue transparent silica dispersion;

[0020] (3) Weigh silver nitrate and polyvinyl alcohol according to the weight ratio of 1:2, add them to the aqueous silica dispersion in turn, stir to dissolve them in the aqueous silica dispersion, and disperse the silver nitrate and silica water The body weight ratio is 1:500;

[0021] (4) adding 1% sodium borohydride aqueous solution to the mixed solution of step (3) by volume, and then ultrasonically vibrating for 2 hours to obtain a dark yellow silica-loaded nano-silver sol;

[0022] The particle size distribut...

Embodiment 2

[0024] (1) dissolving ascorbic acid in deionized water, preparing an ascorbic acid aqueous solution with a weight concentration of 0.1%, and freezing it at 8° C. for 4 hours;

[0025] (2) Weigh the nanometer titanium dioxide powder, prepare a titanium dioxide powder aqueous solution with a weight concentration of 30% with deionized water, then add 0.1% sodium dodecyl sulfonate by weight of the titanium dioxide powder aqueous solution, stir for 2 hours and ultrafilter, Obtain a colorless and transparent titanium dioxide aqueous dispersion;

[0026] (3) Take silver nitrate and polyvinylpyrrolidone according to the weight ratio of 1:1, add in the nano-titanium dioxide aqueous dispersion successively, stir, make it dissolve in the titanium dioxide aqueous dispersion, silver nitrate and titanium dioxide aqueous dispersion weight The ratio is 1:15;

[0027] (4) adding 10% ascorbic acid aqueous solution into the mixed solution of step (3) by volume ratio, and then ultrasonically vib...

Embodiment 3

[0030] (1) Potassium borohydride was dissolved in deionized water to prepare an aqueous potassium borohydride solution with a weight concentration of 0.1%, and frozen at 2° C. for 2 hours;

[0031] (2) Take nano-calcium carbonate powder, use deionized water preparation weight concentration to be 10% calcium carbonate powder aqueous solution, then add the sodium lauryl sulfate of 0.5% calcium carbonate powder aqueous solution weight, stir after 0.5h Ultrafiltration to obtain a light blue transparent nano-calcium carbonate aqueous dispersion;

[0032] (3) Take silver nitrate and AEO-7 according to the weight ratio of 1:5, add in the calcium carbonate water dispersion successively, stir, make it dissolve in the calcium carbonate water dispersion, silver nitrate and calcium carbonate water dispersion weight ratio 1:100;

[0033] (4) Add potassium borohydride aqueous solution 2.5% by volume to the mixed solution of step (3), and then ultrasonically vibrate for 0.5 hours to obtain ...

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Abstract

The invention discloses a making method of inorganic nanometer silver-carrying sol, which comprises the following steps: 1) preparing the reducer solution through deionized water to freeze under 0-8 deg C; 2) preparing inorganic powder solution through deionized water; adding the disperser to produce inorganic water dispersion; 3) adding the silver nitrate and preservative in the inorganic water dispersion; stirring; adding reducer solution to proceed ultrasonic shocking disposal; producing inorganic nanometer silver-carrying sol. The invention possesses dispersing and stable action for high-density nanometer silver sol, which improves the silver content by 3 percent.

Description

technical field [0001] The invention relates to a preparation method of nano-silver sol, in particular to a preparation method of inorganic matter-loaded nano-silver sol. Background technique [0002] Nano-silver sol has good antibacterial properties, and it is widely used in the enhancement of Raman effect on protein surface. However, the performance of high-concentration nano-silver sol is very unstable, so nano-silver sol is very inconvenient in practical application and transportation. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of inorganic matter-loaded nano-silver sol with stable performance and high concentration. [0004] The preparation method of inorganic material loaded nano-silver sol of the present invention, comprises the following steps: [0005] (1) Prepare a reducing agent aqueous solution with a weight concentration of 0.1% with deionized water, and freeze at 0-8° C. for more than 0.5 hours...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 黄德欢韩东生赵斌
Owner 上海华实纳米材料有限公司
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