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Preparation method of nano-silver antibacterial agent

An antibacterial agent and nano-silver technology, applied in the field of antibacterial, can solve the problems of uneven dispersion, prone to agglomeration, poor stability, etc., and achieve the effect of avoiding agglomeration, alleviating silver oxidation, and good biocompatibility.

Inactive Publication Date: 2017-10-10
俞小峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention: Aiming at the problems that the traditional nano-silver antibacterial agent has poor stability, uneven dispersion, and easy agglomeration during use, resulting in poor antibacterial persistence, a preparation method of nano-silver antibacterial agent is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] First, measure 400mL of silver nitrate solution with a mass fraction of 2%, pour it into a beaker, then move the beaker into a magnetic stirrer with digital display speed measurement and constant temperature, and add dropwise The mass fraction is 2% ammonia water, after precipitation occurs in the beaker, continue to drop ammonia water until the precipitate is completely dissolved to obtain silver ammonia solution; weigh 80g of activated carbon, pour it into a pulverizer, and pass through a 80-mesh sieve after crushing to obtain activated carbon powder, and then weigh 20g of the obtained activated carbon powder and 10g of phosphorus pentoxide in turn, pour them into a three-necked flask filled with 100mL of absolute ethanol, and move the three-necked flask into an ultrasonic oscillator, and ultrasonically disperse it at a frequency of 40kHz for 20min. Move the three-necked flask into a magnetic stirrer with digital display speed measurement and constant temperature, and ...

example 2

[0025] First, measure 500mL of silver nitrate solution with a mass fraction of 2%, pour it into a beaker, then move the beaker into a magnetic stirrer with digital speed measurement and constant temperature, and add dropwise The mass fraction is 3% ammonia water, after precipitation occurs in the beaker, continue to drop ammonia water until the precipitate is completely dissolved to obtain silver ammonia solution; weigh 90g of activated carbon, pour it into a pulverizer, and pass through a 100-mesh sieve after crushing to obtain activated carbon powder, and then weighed 25g of the obtained activated carbon powder, 13g of phosphorus pentoxide, and poured them into a three-necked flask filled with 110mL of absolute ethanol, and moved the three-necked flask into an ultrasonic oscillator, and ultrasonically dispersed it at a frequency of 43kHz for 25min. Move the three-necked flask into a magnetic stirrer with digital display speed measurement and constant temperature, and stir at ...

example 3

[0028] First, measure 600mL of silver nitrate solution with a mass fraction of 2%, pour it into a beaker, then move the beaker into a digital speed measuring constant temperature magnetic stirrer, at a temperature of 60°C and a speed of 500r / min, add dropwise The mass fraction is 4% ammonia water, and after precipitation occurs in the beaker, continue to drop ammonia water until the precipitate is completely dissolved to obtain silver ammonia solution; weigh 100g of activated carbon, pour it into a pulverizer, and pass through a 120-mesh sieve after crushing to obtain activated carbon powder, then weigh 30g of the obtained activated carbon powder and 15g of phosphorus pentoxide in sequence, pour them into a three-necked flask filled with 120mL of absolute ethanol, and move the three-necked flask into an ultrasonic oscillator, and ultrasonically disperse it at a frequency of 45kHz for 30min. Move the three-neck flask into a magnetic stirrer with digital display speed measurement...

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Abstract

The invention discloses a preparation method of a nano-silver antibacterial agent, and belongs to the field of antibacterial technology. Activated carbon is crushed and then mixed with phosphorus pentoxide, mixture is dispersed in absolute ethyl alcohol, the phosphorus pentoxide is dissolved in the ethyl alcohol to form phospholipid, the phospholipid is adsorbed on the surface of the activated carbon, calcium nitrate is slowly combined with hydroxy on a phospholipid hydrolysis product to form hydroxy calcium phosphate crystal nucleuses, the hydroxy calcium phosphate crystal nucleuses are adsorbed in pore structures of the activated carbon, agglomeration is avoided, the crystal nucleuses are washed, dried and then calcined, activated carbon cores are removed to obtain calcined materials with porous structures, the calcined materials serve as carriers, glucose serves as a reducing agent for reducing silver-ammonia solution, and generated nano-silver particles are adsorbed by the calcined materials with the porous structures, finally filtered, washed and dried in vacuum to obtain the nano-silver antibacterial agent. The nano-silver antibacterial agent is good in stability and uniform in dispersion in the use process and has high antibacterial endurance.

Description

technical field [0001] The invention relates to a preparation method of a nano-silver antibacterial agent, which belongs to the field of antibacterial technology. Background technique [0002] Antibacterial agents can usually be divided into three categories: natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents. Natural antibacterial agents have the advantages of being safe, non-toxic, broad-spectrum, and good color stability, but their disadvantages such as difficult processing, poor heat resistance, and limited resources have become problems that restrict their development. Organic antibacterial agents can effectively inhibit the growth and reproduction of harmful bacteria and molds, and have quick results, but they are gradually being eliminated due to their poor thermal stability and easy decomposition. Inorganic antibacterial agents have the advantages of broad antibacterial spectrum and good heat resistance, and are easy to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/08A01P1/00A01P3/00
CPCA01N59/16A01N25/08
Inventor 李华盛开洋许丽君
Owner 俞小峰
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