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Method for preparing nano silver antimicrobials

An antibacterial agent and nano-silver technology, applied in the field of preparation of liquid nano-silver antibacterial agent, can solve the problems of polluting the environment, only adapting to low-demand textiles, easy to change color, etc., and achieve high specific surface area, excellent environmental affinity, dispersion good effect

Inactive Publication Date: 2008-05-07
无锡汇罗新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] There are already many patents on the preparation of nano-silver in China, but nano-silver antibacterial materials used in textiles have many defects, such as easy to change color, color itself, pollute the environment during the production process, and only adapt to textiles with low requirements, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment one: the preparation solid content is 0.08 ± 0.02% nano-silver antibacterial agent solution

[0030] The formula raw material ratio of the present invention is by weight percentage:

[0031] Prepare the reaction carrier solution: add water 99.91% (1000ml) to the glass container, add nano-silica carrier 0.03%, add dispersion protection agent polyvinylpyrrolidone: 0.02%, and stir for 20min. Add silver salt silver nitrate: 0.02% to the prepared solution, and stir for 20 minutes. Put the prepared solution into the reaction kettle, stir for 5 minutes at a speed of 650 r / min in a high-speed disperser, and evenly add 0.02% reducing agent sodium borohydride, and continue stirring for 40 minutes . A colorless and transparent solution of the nano-silver antibacterial agent with a solid content of 0.08±0.02% is prepared, and the bottle is sealed. The particle size of elemental silver is: 20-30nm.

Embodiment 2

[0032] Embodiment two: the preparation solid content is 0.2 ± 0.02% nano-silver antibacterial agent solution

[0033] The formula raw material ratio of the present invention is by weight percentage:

[0034] Prepare the reaction carrier solution: add water: 99.79% (1000ml) to the glass container, add nano-silica carrier 0.06%, add dispersion protection agent polyvinylpyrrolidone: 0.05%, and stir for 30min. Add silver salt silver nitrate: 0.05% to the prepared solution, and stir for 30 minutes. Add the prepared solution into the reaction kettle, stir for 8 minutes at a speed of 650 r / min with a high-speed disperser, uniformly add 0.05% sodium borohydride as a reducing agent, and continue stirring for 60 minutes. A colorless and transparent solution of the nano-silver antibacterial agent with a solid content of 0.2±0.02% is prepared, and the bottle is sealed. The particle size of elemental silver is: 20-30nm.

Embodiment 3

[0035] Embodiment three: the preparation solid content is 0.4 ± 0.05% nano-silver antibacterial agent solution

[0036] The formula raw material ratio of the present invention is by weight percentage:

[0037] Prepare the reaction carrier solution: add water: 99.59% (1000ml) to the glass container, add nano-silica carrier 0.11%, add dispersion protection agent polyvinylpyrrolidone: 0.1%, and stir for 30min. Add silver salt silver nitrate: 0.1% to the prepared solution, and stir for 30 minutes. Add the prepared solution into the reaction kettle, stir for 10 min at a speed of 700 r / min with a high-speed disperser, uniformly add 0.1% reducing agent sodium borohydride, and continue stirring for 60 min. A colorless and transparent solution of the nano-silver antibacterial agent with a solid content of 0.4±0.05% is prepared, and the bottle is sealed. The particle size of elemental silver is: 20-30nm.

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Abstract

The invention relates to a preparation method of nanometer silver antibacterial agent, which belongs to the technical field of the antibacterial agent preparation. The invention is characterized in that distilled water or deionized water is taken, nanometer silicon dioxide carrier is added, dispersing protective agent adopts polyvinyl pyrrolidon which is evenly mixed; then silver salt silver nitrate and reducing agent sodium borohydride are added, mixed and dispersed, and the nanometer silver antibacterial agent colorless transparent solution is obtained through sufficient reaction, being bottled and packaged in a sealing way. The invention extends the application scope of nanometer silver greatly; the particle diameter is small, and the particle diameter distribution is even; the smaller particle diameter has higher specific surface area, higher antibiotic activity and lower dosage; the dispersivity of the nanometer silver collosol system is good, and aggregation is not easy to occur; the environment is friendly, and the nontoxic and the nuisance-free raw materials are adopted for the preparation; the invention has quite excellent environment affinity, and pollution can be caused to the environment.

Description

technical field [0001] The invention relates to a method for preparing an antibacterial agent, in particular to a method for preparing a liquid nano-silver antibacterial agent, and belongs to the technical field of antibacterial agent preparation. Background technique [0002] There are all kinds of microorganisms harmful to human health in the living environment of human beings, which are always ready to damage people's bodies. Research on various antibacterial materials has become a hot topic today. Antibacterial materials refer to endowing materials with good antibacterial effects without changing the conventional performance, safety performance and processing performance of the original materials. In the preparation of antibacterial materials, the application of antibacterial agents is particularly critical. [0003] Nano-silver has excellent safety and antibacterial properties, has attracted widespread attention, and has become a third-generation antibacterial agent wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00
Inventor 邵楠郑荣彩
Owner 无锡汇罗新材料科技有限公司
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