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Method for producing nano-silver composite antibacterial agent through spray drying

A composite antibacterial agent and nano-silver technology, applied in the directions of biocides, fungicides, biocides, etc., can solve the problems of difficult to control the hydrophilicity and hydrophobicity of the particle surface, uneven size of nano-silver composite particles, and difficult to adjust the size of silver particle size. , to achieve excellent disinfection and antibacterial performance, high-efficiency broad-spectrum disinfection and antibacterial performance, and the effect of eliminating instability

Inactive Publication Date: 2012-11-21
CHANGZHOU YINGZHONG NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that in the prior art, the silver particle size of the product is not easy to adjust, the nano-silver is unstable and easy to agglomerate, the hydrophilicity and hydrophobicity of the particle surface are not easy to control, and the size of the nano-silver composite particle is not uniform.

Method used

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  • Method for producing nano-silver composite antibacterial agent through spray drying
  • Method for producing nano-silver composite antibacterial agent through spray drying
  • Method for producing nano-silver composite antibacterial agent through spray drying

Examples

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Effect test

Embodiment 1

[0023] Mix 50 kg of γ-aminopropyltriethoxysilane with 30 kg of ethoxysilane, 100 kg of water, and 20 kg of silver nitrate; pump it into a high-speed rotating spray disc with a diameter of 150 mm at a constant speed of 5 kg per hour. The rotation speed of the rotating turntable is 25000rpm, and the tiny droplets atomized by high-speed centrifugal are dried by 400 cubic meters per hour and 250℃ hot air cyclone. After cyclone separation, they are collected and packaged. After drying, the average particle size of the particles is 1μm, and the alcohol content in the air is 0.8% (volume) , The drying time is 10 seconds, and the average particle size of nano-silver after drying is 3.2 nanometers. TEM image of spray-dried silver / silica particles synthesized as figure 1 shown.

Embodiment 2

[0025] Mix 50 kg of γ-aminopropyltriethoxysilane with 30 kg of ethoxysilane, 100 kg of water, and 1 kg of silver nitrate; pump it into a high-speed rotating spray disc with a diameter of 150 mm at a constant speed of 5 kg per hour. The rotation speed of the rotating turntable is 10000rpm, and the tiny droplets atomized by high-speed centrifugal are dried by 400 cubic meters per hour hot air at 250℃, and collected and packaged after cyclone separation. After drying, the particle size is 2 μm. The alcohol content in the air is 0.8% (volume). Drying time 10 seconds. After drying, the average particle size of nano-silver is 1 nanometer.

Embodiment 3

[0027]Mix 50 kg of γ-aminopropyltriethoxysilane with 30 kg of ethoxysilane, 100 kg of water, and 40 kg of silver nitrate; pump it into a high-speed rotating spray disc with a diameter of 150 mm at a constant speed of 20 kg per hour, and The rotation speed of the rotating turntable is 10000rpm, and the tiny droplets atomized by high-speed centrifugal are dried by 400 cubic meters per hour of hot air at 250℃, and collected and packaged after cyclone separation. After drying, the particle size is 6 μm. The alcohol content in the air is 3% (volume). Drying time 10 seconds. After drying, the average particle diameter of nano-silver is 3.8 nanometers.

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Abstract

The present invention relates to a method for industrial production of a nano-silver composite antibacterial agent. In the prior art, a particle size of nano-silver is large and is not easily adjusted, nano-silver is unstable and is easily agglomerated, and a particle size of nano-silver composite particles is non-uniform. A purpose of the present invention is mainly to solve problems in the prior art. According to the present invention, the method for producing the nano-silver composite antibacterial agent is provided, wherein the method comprises the following steps: a) mixing silane having an amine functional group, alkoxy silane, silver nitrate or silver acetate, and water to form a mixing liquid; b) pumping the mixing liquid into a rotation disc at a high-speed rotation state in a dryer, carrying out centrifugal atomization to obtain tiny liquid droplets, and carrying out cyclone drying with hot air to obtain dried particle powder; c) separating the particle powder with a cyclone separator, and then collecting to obtain the nano-silver composite antibacterial agent with a uniform particle size. With the present invention, problems in the prior art are solved, and the technical scheme of the present invention can be used in production of antibacterial materials with characteristics of long acting and broad spectrum.

Description

technical field [0001] The invention relates to a method for producing a nano-silver composite antibacterial agent. Background technique [0002] At present, due to the shortcomings of organic antibacterial agents such as poor safety, easy to produce microbial resistance, poor heat resistance, and easy migration, inorganic antibacterial agent nano-silver has received extensive attention in recent years. The bactericidal effect of nano-silver may be related to the damage of cell membrane by surface free radicals. The application of nano-silver products in developed countries has been rapidly popularized. Nano-silver has strong antibacterial power and can kill Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis, Candida albicans, various molds and viruses, such as various hepatitis, bird flu, AIDS virus, etc. The addition of one ten-thousandth of the amount can make the product have a good antibacterial effect, and it is broad-spectrum, long-la...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P3/00B82Y40/00
Inventor 姜兴茂
Owner CHANGZHOU YINGZHONG NANO TECH
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