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Liquid nano silver preparation method

A nano-silver, liquid technology, applied in nanotechnology and other directions, can solve the problems of high impurity content of nano-silver, wide particle size distribution, easy agglomeration, etc., and achieve the effect of simple and easy preparation method and excellent antibacterial effect.

Active Publication Date: 2019-03-15
BEIJING GUANGHE BIOTECH CO LTD
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  • Abstract
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Problems solved by technology

However, this method has problems such as high nano-silver impurity content, wide particle size distribution, and easy agglomeration.

Method used

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  • Liquid nano silver preparation method

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Embodiment Construction

[0011] Below, the implementation of the technical solution will be further described in detail in conjunction with the accompanying drawings.

[0012] Those skilled in the art can understand that although the following description involves many technical details related to the embodiments of the present invention, this is only an example for illustrating the principle of the present invention, and does not imply any limitation. The present invention can be applied to occasions other than the technical details exemplified below, as long as they do not deviate from the principle and spirit of the present invention.

[0013] In addition, in order to avoid making the description in this manual limited to redundant, in the description in this manual, some technical details that can be obtained in the existing technical documents may be omitted, simplified, modified, etc. understandable to human beings, and this does not affect the adequacy of the disclosure of this specification. ...

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Abstract

The present disclosure relates to a liquid nano silver preparation method. The method comprises the following steps of 1, adding a stabilizer to a silver nitrate solution at room temperature and magnetic stirring; 2, stirring the mixture and adding an ascorbic acid solution, specifically, the molar ratio of silver nitrate to ascorbic acid is controlled to range from 1:4 to 1:7; 3, adding a sodiumhydroxide solution to control the pH value of a system to range from 7.6 to 8.0; and 4, stirring the mixture to obtain a liquid nano silver product. The liquid nano silver prepared by the method has an excellent antibacterial effect, and especially has an antibacterial effect against bacillus subtilis, and the antibacterial rate is almost 100%; the liquid nano silver can also inhibit the growth ofaspergillus niger, the inhibition rate is 90%, and the effective antibacterial time can be up to 30 days; the preparation method is simple and easy to implement, and conforms to the green chemistry concept.

Description

technical field [0001] The invention relates to the technical field of chemical manufacturing of metal powder, in particular to a method for preparing liquid nano silver. Background technique [0002] At present, plant tissue culture technology has achieved remarkable economic and social benefits since it was used in scientific research and production practice. However, during the industrialization of plant tissue culture technology, microbial contamination frequently occurs, resulting in a huge waste of manpower, material and financial resources. The main cause of plant tissue culture contamination is the failure or poor inhibition of mold, bacteria and yeast. Traditional plant tissue culture antibacterial agents mainly include mercuric chloride, sodium hypochlorite, bleaching powder, alcohol, etc. [1] . However, mercury chloride is easy to pollute the environment; bleaching powder is easy to absorb moisture; alcohol cannot achieve complete sterilization, and must be com...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB82Y40/00B22F9/24
Inventor 任建军郑燕英何雪范金娇梁硕
Owner BEIJING GUANGHE BIOTECH CO LTD
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