Polyaniline compound antibacterial agent and preparation method thereof

A technology of composite antibacterial agent and polyaniline, which is applied in the field of nano-silver/polyaniline composite antibacterial agent and its preparation, can solve problems such as poor thermal stability, achieve low cost, simple preparation process, good thermal stability and biocompatibility sexual effect

Inactive Publication Date: 2010-03-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is no external reducing agent in this type of method, it still has the problem of poor thermal stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First prepare 300ml of nitric acid solution with a molar concentration of 0.1mol / L, and divide it into two equal parts, add an aniline monomer with a molar concentration of 0.5mol / L in a part of the nitric acid solution, stir evenly at room temperature, and form A solution, add 0.025mol / L ammonium persulfate to another part of nitric acid solution, and stir evenly to form B solution, quickly pour B solution into A solution at room temperature, and then stand at room temperature for 12 to 24 hours . Then, the reaction system was separated by vacuum filtration, and washed with distilled water and acetone until the pH of the filtrate was 7. Finally, vacuum-dry the obtained solid at 40-70° C. for 12 hours to obtain the polyaniline antibacterial agent. The obtained polyaniline fibers had a diameter of about 100 nm. According to the antibacterial experiment results, the obtained polyaniline antibacterial agent has a bacteriostatic rate of 80.57% for yeast, 85.62% for Escher...

Embodiment 2

[0018] First prepare 300ml of nitric acid solution with a molar concentration of 0.1mol / L, and divide it into two equal parts, add aniline monomer with a molar concentration of 0.5mol / L and silver nitrate of 0.005mol / L to a part of the nitric acid solution , stir evenly at room temperature to form liquid A, add 0.025mol / L ammonium persulfate to another nitric acid solution, and stir evenly to form liquid B, quickly pour liquid B into liquid A at room temperature, and then Let stand at room temperature for 12-24 hours. Then, the reaction system was separated by vacuum filtration, and washed with distilled water and acetone until the pH of the filtrate was 7. Finally, vacuum-dry the obtained solid at 40-70° C. for 12 hours to obtain the nano-silver / polyaniline composite antibacterial agent. The diameter of the polyaniline fiber is about 80nm, and the diameter of the silver particle is 20nm. According to the antibacterial experiment results, the antibacterial rate of the obtain...

Embodiment 3

[0020] First prepare 300ml of nitric acid solution with a molar concentration of 0.1mol / L, and divide it into two equal parts, and add aniline monomer with a molar concentration of 0.5mol / L and silver nitrate of 0.01mol / L to a part of the nitric acid solution , stir evenly at room temperature to form liquid A, add 0.025mol / L ammonium persulfate to another nitric acid solution, and stir evenly to form liquid B, quickly pour liquid B into liquid A at room temperature, and then Let stand at room temperature for 12-24 hours. Then, the reaction system was separated by vacuum filtration, and washed with distilled water and acetone until the pH of the filtrate was 7. Finally, vacuum-dry the obtained solid at 40-70° C. for 12 hours to obtain the nano-silver / polyaniline composite antibacterial agent. The diameter of the polyaniline fiber is about 50nm, and the diameter of the silver particle is 40nm. According to the antibacterial experiment results, the antibacterial rate of the obt...

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Abstract

The invention relates to a nano silver / polyaniline compound antibacterial agent and a preparation method thereof and adopts a rapid mixing method to synthesize the nano silver / polyaniline compound antibacterial agent by one step. Polyaniline exists in the form of nano fiber, the diameter of which ranges between 50-200nm and the silver exists in a spherical structure with the diameter being 20-200nm. The compound antibacterial agent has excellent bactericidal effect on saccharomycetes, colibacillus, staphylococcus aureus and other various different strains, wherein the components of the polyaniline and silver present conspicuous coordinative antibacterial action. The antibacterial agent has low raw material cost, simple preparation process, good thermal stability and uniform distribution ofnano silver particles, overcomes the defect that a large quantity of chemical stabilizer, reducing agent and other harmful ingredients are added during the preparation process of amounts of nano silver antibacterial agent in the existing market, and meanwhile, has excellent biocompatibility, does no toxicity and harm to the human body and is easy for industrialization and high in economic and social values.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, in particular to a nano-silver / polyaniline composite antibacterial agent and a preparation method thereof. technical background [0002] Health is one of the subjects that people are most concerned about. However, bacteria are ubiquitous and pervasive, and their spread and spread seriously threaten human health. In order to protect human health, the development and application of antibacterial materials is an effective method. However, with the extensive use of chemical drugs such as antibiotics, disinfectants and bactericides, more and more bacterial mutation populations caused by drug resistance have caused frequent global bacterial disasters. In order to prevent the occurrence of bacterial disasters, it is imperative to develop and apply new antibacterial materials. Inorganic antibacterial materials have the advantages of high safety, good heat resistance and durability, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N33/06A01N25/10A01P1/00
Inventor 贾庆明王亚明陕绍云蒋丽红
Owner KUNMING UNIV OF SCI & TECH
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