Process for preparing silicon dioxide of carrying nano silver

A technology of silica and silica gel, applied in the direction of silica, silica, etc., can solve the problems of wide distribution range, coarse nano-silver loaded silica particles, complex process, etc., achieve complete adsorption, low cost, The effect of simple process

Inactive Publication Date: 2005-06-08
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is complex, and the obtained nanosilver-loa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] 25.6 grams of silver nitrate solids are added to 75.26 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; In the silver solution, stir evenly, then add 1600 milliliters of 1% (wt %) ascorbic acid aqueous solution under stirring, after reacting to the solution at room temperature all change to nano-silver, add 2600 milliliters of 30% (wt %) silica sol solution or 10% ( wt%) 7200 milliliters of nano-silica dispersion liquid, stir until the nano-silver is fully adsorbed on the silica particles, then centrifuge and concentrate to obtain a yellow-brown nano-silver-loaded silica suspension, filter, dry, and pulverize to obtain the nano-silver-loaded silica suspension. Silica powder of nano silver.

Example Embodiment

[0019] Example 2

[0020] 25.6 grams of silver nitrate solids are added to 73.6 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; 2176 milliliters of 10% (wt %) anionic surfactant sodium lauryl sulfate aqueous solution are added in the silver nitrate solution, Stir evenly, be warming up to 90 DEG C, constant temperature 2 hours, then add 1600 milliliters of 1% (wt %) ascorbic acid aqueous solution under stirring, after reacting to solution and all change to nano-silver, add 30% (wt %) silica sol solution 2600 milliliters, Stir until the nano-silver is fully adsorbed on the silica particles, then cool down to 40°C, use an ultrafiltration membrane with a molecular weight cut-off of 10,000 to perform ultrafiltration, and wash the concentrated solution with 24 liters of deionized water three times, and continue ultrafiltration until the volume of the filtrate is 8 liters Afterwards, the dark yellow-brown silver-loaded nano-silver sil...

Example Embodiment

[0021] Example 3

[0022] 25.6 grams of silver nitrate solids are added to 73.6 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; 2176 milliliters of 10% (wt %) anionic surfactant sodium dodecylsulfonate aqueous solution are added in the silver nitrate solution , stir evenly, be warming up to 90 DEG C, constant temperature 2 hours, then add 1300 milliliters of 1% (wt%) citric acid aqueous solution under stirring, after reacting to the solution and all change to nano-silver, add 10% (wt%) nano-silicon dioxide 7200 milliliters of the dispersion liquid, stirred until the nano-silver is fully adsorbed on the silica particles, then cooled and left to settle, concentrated to obtain a yellow-brown nano-silver-loaded silica suspension, filtered, dried, and pulverized to obtain nano-silver-loaded silica Silica powder body.

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PUM

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Abstract

A process for preparing the SiO2 gel carrying nano-Ag includes such steps as dissolving silver nitrate in deionized water, adding the solution of surfactant and reducer to generate nano-Ag sol, adding SO2 gel, and adsorbing the nano-Ag by SO2 gel particles.

Description

technical field [0001] The invention relates to a preparation method of nanosilver-loaded silica colloid, in particular to a preparation method of nanosilver-loaded silica colloid for antibacterial use. technical background [0002] With the improvement of people's living standards, long-lasting sterility requirements are put forward for basic necessities of life, household appliances and living environment. As a new type of antibacterial material, nano-silver has many advantages such as broad spectrum, durability, and safety, so its application fields continue to expand. Inorganic antibacterial materials have broad market prospects. The composition of the inorganic antibacterial agent mainly includes a carrier and an antibacterial component. The carrier supports the antibacterial component to ensure the stability of the active component and has slow-release properties. The antibacterial ingredients are mainly some metal ions, such as silver, copper, zinc, etc. or nano-meta...

Claims

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Application Information

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IPC IPC(8): C01B33/14
Inventor 骆小红姜玉彩王艳蕾
Owner CHINA LUCKY FILM CORP
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