Liquid nanometer simple substance silver antibacterial agent and preparation method thereof

A nano-element, antibacterial agent technology, applied in the field of antibacterial agents, can solve the problems of prolonged production cycle, large product particle size, application limitations, etc., and achieves the effects of high content of active ingredients, increased contact area, and reduced production costs.

Inactive Publication Date: 2006-02-08
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of antibacterial agent has good safety and is a kind of antibacterial agent that is widely used at present, but its stability is poor, easy to change color, and it is a powder material, which needs to be dispersed again before application
[0009] The heat resistance of the second type of inorganic antibacterial agent is higher than that of the first type of inorganic antibacterial agent, but it must have ultraviolet radiation, oxygen or water to play a bactericidal effect, and there is also the problem of re-dispersion, so the application is limited
Like this, can increase production cost greatly, have increased a process again simultaneously, prolong production cycle; The 2nd, the product particle diameter that obtains in the two patent application methods is larger, and the range is wider (1-50nm)
And the smaller and narrower the distribution of nanometer particle size, the higher its activity, the ...

Method used

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  • Liquid nanometer simple substance silver antibacterial agent and preparation method thereof

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preparation example Construction

[0032] In the preparation process of nano silver, the requirements for water are very strict. In the prior art, distilled water and pure water are generally used. Although tap water is cheap and good, it is rarely used. This is because tap water contains more Cl - , It will react with silver ions to form a white AgCl precipitate. On the one hand, it will reduce Ag + The effective concentration of AgCl particles generated at the same time is equivalent to adding a nucleating agent to make the generated nano silver particles larger. Therefore, in the process of preparing nano-silver in the prior art, distilled water or pure water must be used to eliminate Cl - Interference. The applicant went through tests after repeated studies, although the silver nitrate or silver sulfate solution prepared by tap water was partially Ag + It turns into AgCl and shows white turbidity, but after mixing with silver complexing agent and stirring for a period of time, the white precipitate will disappe...

Embodiment 1

[0040] (1) Mix 0.5% betaine polymer and 47% tap water into a betaine polymer aqueous solution; then mix 0.5% hydrogen peroxide and 50% tap water to form a hydrogen peroxide aqueous solution;

[0041] (2) Put the betaine polymer aqueous solution into the reaction kettle, add 2% silver nitrate in a high-speed disperser at a stirring speed of 800r / min, and stir for about 1.5 hours to make the silver ion and the betaine polymer The solution fully undergoes complexation reaction;

[0042] (3) Finally, the hydrogen peroxide aqueous solution is sprayed into the solution obtained in step (2) through the sprayer and under the flow control of 1000ml per minute. After the spraying is completed, continue to stir the reaction and stir for 1 hour. The liquid nano-silver antibacterial agent is obtained.

Embodiment 2

[0044] (1) Mix 5% of polymaleic acid and 44% of distilled water to form an aqueous solution of polymaleic acid; then mix 3% of sodium borohydride and 45% of distilled water to form an aqueous solution of sodium borohydride;

[0045] (2) Add the polymaleic acid aqueous solution into the reaction kettle, add 3% silver sulfate in a high-speed disperser at a stirring speed of 700r / min, and stir for 1 hour to make the silver ion and the polymaleic acid solution fully complex. Combined reaction

[0046] (3) Finally, the sodium borohydride aqueous solution is sprayed into the solution obtained in step (2) through the sprayer and under the flow control of 800ml per minute. After the spraying is completed, continue to stir the reaction and stir for 1 hour. The liquid nano-silver antibacterial agent is obtained.

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Abstract

Disclosed is a liquid state nano antimicrobial agent of Argentine simple substance, which comprises the following constituents (by weight percent): argentic salt 2-5%, nano Argentine generating agent 0.5-5%, Argentine complexing agent 0.5-8%, and water 82-97%. In the preparation, ionic type high molecular polymer is used as the Argentine complexing agent.

Description

Technical field [0001] The invention relates to an antibacterial agent, in particular to a liquid nano-silver antibacterial agent and a preparation method of the antibacterial agent. Background technique [0002] There are a variety of harmful microorganisms in people's living environment, which have a negative impact on human life. According to the survey of the Scottish Telephone Company in the United Kingdom, colds, pharyngitis, meningitis, hepatitis, pink eye, skin diseases, tuberculosis and other more than ten kinds of infections The disease can be spread through the use of the telephone. People found a kind of "refrigerator syndrome" syndrome caused by eating foods contaminated by bacteria in the refrigerator, which caused gastroenteritis, sore throat, nausea, and dizziness. Therefore, various antibacterial materials closely related to people's lives were studied. Has become a hot topic today. [0003] Antibacterial materials refer to giving the materials good antibacterial...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/02
Inventor 陈丽琼李荣先
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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