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Nano-silver composite antibacterial and antivirus material

A composite antibacterial and composite material technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of weakened sterilization and disinfection effects of silver particles, achieve high-efficiency sterilization and disinfection, and simple manufacturing method , low toxicity effect

Active Publication Date: 2020-10-23
王一群 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, with the rapid development of nanotechnology, nanomaterials have been widely used in various fields. As the most common nanomaterial, nanosilver particles have been widely recognized for their application value in various aspects and have been widely used in medical care. , food, cosmetics, textiles and other daily necessities, etc., but due to the toxicity of silver particles, the nano-size effect and the adjustable release of silver ions, the nano-silver particle solution has high antibacterial and bactericidal properties. At the same time, it also makes nano-silver particles have certain biological toxicity. Studies have found that nano-silver particles with different particle sizes have different toxic effects on organisms. Studies have found that 5-20nm nano-silver particles have greater toxic effects on organisms than other particles. This is mainly due to the nano-size effect that makes it easier for 5-20nm nano-silver particles to enter the organism through the skin and digestive system. By studying the effect of silver particles on liver toxicity in mice, the study shows that 5- 20nm silver particles caused mouse liver cell apoptosis, while micron silver did not produce cytotoxicity, but the larger size of silver particles also weakened the sterilization effect;

Method used

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  • Nano-silver composite antibacterial and antivirus material
  • Nano-silver composite antibacterial and antivirus material
  • Nano-silver composite antibacterial and antivirus material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In a 250ml flask, put 100ml of ethylene glycol, 3g of polyvinyl pyrrolidone (PVPK60) with a molecular weight of about 360,000, and place it in an oil bath at 140 degrees to dissolve completely while stirring, and then add 1g of silver nitrate (AgNO3 ) to dissolve completely, continue to add 0.0036g of KBr and 0.0129g of AgCl as nucleating agents, continue to stir for 1 hour, then set the temperature to 150 degrees and continue to react for 1 hour;

[0045] The obtained solution was centrifuged, washed with acetone and pure water, dried to obtain a powder, and the powder was subjected to scanning electron microscope observation results as follows: figure 1 shown, from figure 1 It can be seen that the synthesized basically pure silver nanowires.

[0046] Dissolve 0.3g of the above-mentioned silver nanowires in 100g of water, add 0.1g of sodium lauryl sulfate dispersant and hydrolyzed solution containing 0.1g of tetraethyl orthosilicate (20.25g of absolute ethanol, 6g of ...

Embodiment 2

[0049] In a 250ml flask, put 100ml of ethylene glycol, 2.75g of polyvinylpyrrolidone (PVPK60) with a molecular weight of about 360,000 and 0.25g of polyvinylpyrrolidone (PVPK30) with a molecular weight of about 40,000, and Place it in an oil bath at 140 degrees and stir to dissolve completely, then add 1g of silver nitrate (AgNO3) to dissolve completely. Continue to add 0.0036g of KBr and 0.0129g of AgCl as a nucleating agent, continue to stir for 1 hour, then set the temperature to 150 degrees and continue to react for 1 hour;

[0050] The obtained solution was centrifuged, washed with acetone and pure water, dried to obtain a powder, and the powder was subjected to scanning electron microscope observation results as follows: figure 2 shown, from figure 2 It can be seen that there are obvious nano-silver particles attached to the synthesized nano-silver wire, and it can be determined that the nano-silver composite antibacterial and anti-virus materials, of which the nano-s...

Embodiment 3

[0054] In a 250ml flask, put 100ml of ethylene glycol, 2.50g of polyvinylpyrrolidone (PVPK60) with a molecular weight of about 360,000 and 0.5g of polyvinylpyrrolidone (PVP K30) with a molecular weight of about 40,000, and Place in an oil bath at 140°C and stir to dissolve completely, then add 1g of silver nitrate (AgNO3) to dissolve completely, continue to add 0.0036g of KBr and 0.0129g of AgCl as nucleating agents, continue to stir for 1 hour, then set the temperature to Set at 150 degrees to continue the reaction for 1 hour;

[0055] The obtained solution was centrifuged, washed with acetone and pure water, dried to obtain a powder, and the powder was subjected to scanning electron microscope observation results as follows: image 3 shown, from image 3 It can be seen that there are obvious nano-silver particles attached to the synthesized nano-silver wire, and it can be determined that the nano-silver composite antibacterial and anti-virus material, in which the nano-silv...

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Abstract

The invention discloses a nano-silver composite antibacterial and antivirus material. The preparation method comprises the following step: (1) selection of polyvinylpyrrolidone with different molecular weights: polyvinylpyrrolidone with high molecular weight of about 360000 and polyvinylpyrrolidone with low molecular weight of about 40000 (PVP K30) are mixed and used according to a certain proportion in the synthesis reaction, and the amount of nano silver wires and nano silver particles in a final product can be adjusted by adjusting the proportion of the two kinds of polyvinylpyrrolidone. The nano-silver composite antibacterial and antivirus material provided by the invention has efficient sterilization and disinfection effects and low toxicity. By adopting a polyol reduction method, thecomposite material which is simple in manufacturing method and low in cost and is formed by tightly attaching the nano-silver particles to the nano-silver wires is provided. The composite material has the sizes of the nano-silver wires and the specific surface areas of the nano-silver particles, so that the composite material has efficient sterilization and disinfection effects and low toxicity.

Description

technical field [0001] The invention relates to the technical field of antivirus materials, in particular to nano-silver composite antibacterial and antivirus materials. Background technique [0002] In recent years, with the rapid development of nanotechnology, nanomaterials have been widely used in various fields. As the most common nanomaterial, nanosilver particles have been widely recognized for their application value in various aspects and have been widely used in medical care. , food, cosmetics, textiles and other daily necessities, etc., but due to the toxicity of silver particles, the nano-size effect and the adjustable release of silver ions, the nano-silver particle solution has high antibacterial and bactericidal properties. At the same time, it also makes nano-silver particles have certain biological toxicity. Studies have found that nano-silver particles with different particle sizes have different toxic effects on organisms. Studies have found that 5-20nm nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/10A01P1/00A01P3/00B22F9/30B82Y30/00B82Y40/00
CPCA01N59/16A01N25/10B22F9/30B82Y30/00B82Y40/00
Inventor 李德善王一群西田充志
Owner 王一群
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