Simple and convenient method for preparing nano-silver complex antimicrobial agent

A composite antibacterial agent, nano-silver technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high cost, large pollution, decreased antibacterial performance, etc. The effect of good dispersion and strong adsorption capacity

Active Publication Date: 2018-11-02
GUANGDONG INST OF MICROBIOLOGY GUANGDONG DETECTION CENT OF MICROBIOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although silver nanomaterials are widely used in antibacterial materials and antibacterial medical materials, the existing production methods are costly and polluting, and their particles are easily oxidized and aggregated by air, resulting in a decline in their antibacterial properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 2g of γ-polyglutamic acid powder and dissolve it in 100ml of double-distilled water to make a 2% γ-polyglutamic acid solution; weigh 2g of silver nitrate and dissolve it in 100ml of double-distilled water to make a 2% Silver nitrate solution: Weigh 1g lithium magnesium silicate, put it into a porcelain crucible, add it to 33mL of double distilled water, then add 7ml of 2% gamma-polyglutamic acid solution while stirring and adding, then Add 15ml of the 2% silver nitrate solution prepared above. Then put the porcelain crucible containing the mixture in a muffle furnace and bake at 400°C for 40 minutes. After the temperature of the muffle furnace is lowered, the above-mentioned heated and dried powder is collected, and gradually cooled to room temperature in an indoor environment, and a nano-silver composite antibacterial agent of magnesium lithium silicate + nano-silver + polyglutamic acid biochar is made.

[0019] After measuring, the nano-silver composite antibac...

Embodiment 2

[0021] Weigh 1g of γ-polyglutamic acid powder and dissolve it in 100ml of double-distilled water to make a 1% γ-polyglutamic acid solution; weigh 2g of silver nitrate and dissolve it in 100ml of double-distilled water to make a 2% Silver nitrate solution: Weigh 1g lithium magnesium silicate, put it into a porcelain crucible, add it to 17mL of double distilled water, then add 10ml of 1% gamma-polyglutamic acid solution while stirring and adding, then Add 12ml of the 2% silver nitrate solution prepared above. Then put the porcelain crucible containing the mixture in a muffle furnace and bake at 380°C for 10 minutes. After the temperature of the muffle furnace is lowered, the above-mentioned heated and dried powder is collected, and gradually cooled to room temperature in an indoor environment, and a nano-silver composite antibacterial agent of magnesium lithium silicate + nano-silver + polyglutamic acid biochar is made.

[0022] After measuring, the nano-silver composite antiba...

Embodiment 3

[0024] Weigh 3g of γ-polyglutamic acid powder and dissolve it in 100ml of double-distilled water to make a 3% γ-polyglutamic acid solution; weigh 3g of silver nitrate and dissolve it in 100ml of double-distilled water to make a 3% Silver nitrate solution: Weigh 1g lithium magnesium silicate, put it into a porcelain crucible, add it to 25mL of double distilled water, then add 5ml of 3% gamma-polyglutamic acid solution while stirring and adding, then Add 12ml of the 3% silver nitrate solution prepared above. Then put the porcelain crucible containing the mixture in a muffle furnace and bake it at 420°C for 60 minutes. After the temperature of the muffle furnace is lowered, the above-mentioned heated and dried powder is collected, and gradually cooled to room temperature in an indoor environment, and a nano-silver composite antibacterial agent of magnesium lithium silicate + nano-silver + polyglutamic acid biochar is made.

[0025] After measuring, the nano-silver composite anti...

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Abstract

The invention discloses a simple and convenient method for preparing a nano-silver complex antimicrobial agent. A water solution containing gamma-polyglutamic acid, a silver ion source and magnesium lithium silicate is pyrolyzed, and the pyrolyzed powder is the nano-silver complex antimicrobial agent. The simple, convenient and ingenious method combining a physical method and a chemical method provided by the invention has the characteristics of simplicity, convenience, environment protection, high efficiency and high antimicrobial activity; and according to the prepared nano-silver complex antimicrobial agent, nano-silver particles are small in particle size and good in dispersibility without agglomeration, and the nano-silver complex antimicrobial agent can be gradually released from a substrate so as to achieve the aim of a long-term antimicrobial property.

Description

Technical field: [0001] The invention belongs to the field of preparation of antibacterial agents, and in particular relates to a preparation method of a nano-silver antibacterial agent which is simple, low-cost, high-efficiency, environment-friendly, good in dispersibility and does not agglomerate. Background technique: [0002] Nanomaterials are a new type of material that is developing rapidly. Among them, nanosilver has attracted people's attention since it came out. This is not only because of its unique electronic properties, optical properties, mechanical properties and catalytic properties, but also has good antibacterial properties. advantages such as high stability, biocompatibility and easy surface modification. Therefore, nano-silver has broad application prospects in biomedical materials, chemical catalysts, ceramic materials, conductive pastes, sewage treatment, building materials, light-absorbing materials, coatings, sensors, high-performance electrode materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30B82Y30/00
CPCB22F9/30B82Y30/00
Inventor 施庆珊谢小保陈铭杰李瑞敏黄键菲李文茹冯劲
Owner GUANGDONG INST OF MICROBIOLOGY GUANGDONG DETECTION CENT OF MICROBIOLOGY
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