Nano silver copper bimetal colloid/liquid with high antibacterial performance and preparation method thereof

A nano-silver and bimetallic technology, applied in botany equipment and methods, fungicides, chemicals for biological control, etc., can solve the problems of weak fungal sterilizing ability, achieve improved antibacterial ability, high practical value, and save The effect of usage

Inactive Publication Date: 2019-05-31
尚蒙科技无锡有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, precious metals are non-renewable, and it is necessary to consider reducing the use of silver precious metals
Although copper and other base metals alone have certain antibacterial and bactericidal capabilities, they are much weaker than nano silver or silver ions, and nano silver is weaker than other bacteria in general.

Method used

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  • Nano silver copper bimetal colloid/liquid with high antibacterial performance and preparation method thereof
  • Nano silver copper bimetal colloid/liquid with high antibacterial performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 (water-soluble type):

[0020] A nano-silver-copper bimetallic sol, the preparation method is as follows: in parts by weight, add 300 parts of 0.01-0.10mol / L silver nitrate and 0.01-0.10mol / L copper nitrate in an aqueous solution with a concentration of 0.05-1mol / L L of stabilizer aqueous solution, stirred evenly, aged for 2-3 hours, then added 100 parts of 0.005-0.01mol / L reducing agent aqueous solution, stirred for 30-60min, and obtained.

[0021] In this embodiment, the stabilizer is sodium dodecylsulfonate (SDS), and the reducing agent is hydrazine hydrate.

Embodiment 2

[0022] Embodiment 2 (alcohol type):

[0023] A nano-silver-copper bimetallic sol, the preparation method is as follows: in parts by weight, add 100 parts of 0.01-0.10mol / L silver nitrate and 0.01-0.10mol / L copper nitrate in absolute ethanol solution with a concentration of 0.05 -1mol / L DBS absolute ethanol solution, after stirring evenly, then add 300 parts of 0.005-0.01mol / L citric acid absolute ethanol solution, stir for 30-60min, then age for 2-3 hours, the reaction process system Do it as much as possible at a constant temperature.

Embodiment 3

[0024] Embodiment 3: (water-soluble type):

[0025] A nano-silver-copper bimetallic sol, the preparation method is as follows: in parts by weight, add 200 parts of 0.01-0.10mol / L silver nitrate and 0.01-0.10mol / L copper nitrate in an aqueous solution with a concentration of 0.05-1mol / L L of stabilizer aqueous solution, stir evenly, age for 2-3 hours, then add 200 parts of 0.005-0.01mol / L reducing agent aqueous solution, stir for 30-60min to obtain.

[0026] In this embodiment, the stabilizer is polyvinyl alcohol (PVA), and the reducing agent is N,N-dimethylformamide.

[0027] The minimum inhibitory concentration (MIC) of this nanometer silver-copper bimetal particle is as follows:

[0028]

[0029] Wherein, the nano-silver-copper double metal concentration is the total concentration (weight / volume) of silver and copper.

[0030] In summary, the antibacterial ability of the present invention is significantly higher than that of nano silver, which not only saves the amount ...

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Abstract

The invention discloses nano silver copper bimetallic colloid/liquid with high antibacterial performance.A preparation method of the nano silver copper bimetallic colloid/liquid with high antibacterial performancecomprises the following steps of: adding an aqueous solution or an absolute ethyl alcohol solution of a stabilizing agent into the aqueous solution or the absolute ethyl alcohol solutionof silver nitrate and copper nitrate, stirring uniformly, adding the aqueous solution or the absolute ethyl alcohol solution of a reducing agent, and stirring for 30-60minutes to obtain the nano silver copper bimetallic colloid/liquid.According to the preparation method of the nano silver copper bimetallic colloid/liquid with high antibacterial performance,a chemical synthesis method is utilized to obtain the nano silver copper bimetallic colloid/liquid, and prepared nano particles are within 10 nanometers.The minimum bacteriostatic concentration of the composite nano silver copper bimetal toescherichia coli and candida albicans reaches 0.5ppm and 1ppm respectively.The minimum bacteriostatic concentration of nano silver synthesized by the conventional method is 3ppm and 10ppm respectively.The antibacterial capacity of anano silver copper dispersion is improved by 6 times and 10 times.The use of the nano silver copper bimetal saves the use amount of silver and has high practical value.

Description

technical field [0001] The invention relates to the field of nano-antibacterial technology disinfection, in particular to a nano-silver-copper bimetallic colloid / liquid with high antibacterial performance. Background technique [0002] Nano-silver dispersion (or hydrosol colloid) has been widely used in antibacterial disinfection, including medical equipment, surgical dressings and antibacterial coatings, etc. It is an important component of inorganic antibiotics and disinfection, killing bacteria and viruses. It has strong antibacterial ability and is widely used Spectrum antibacterial (up to more than 650 kinds of bacteria and viruses), no drug resistance and other advantages. [0003] At present, inorganic antibacterial is mainly represented by nano silver, and antibacterial nano silver sol or solution is prepared by electrolytic method or chemical reduction method. The particle size is 5-100 nanometers. Among them, the advantage of the electrolysis method is that it do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N59/16A01N59/20A01P1/00A01P3/00
Inventor 杨得全杨龙来刘尚红
Owner 尚蒙科技无锡有限公司
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