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Nano polyaniline/ZnO composite antibacterial agent and preparation method thereof

A composite antibacterial agent and nano-polyaniline technology, which is applied in the field of polyaniline/ZnO composite antibacterial agent and its preparation, can solve the problems of process stability, quality repeatability control, nano powder storage and transportation technical problems are not very good To solve and control the shape, distribution, particle size, performance of the particles and the control and dispersion of aggregates, the research is not enough, and the development of nano-zinc oxide application technology is not enough, so as to achieve good synergistic antibacterial properties, good thermal stability and biocompatibility. The effect of excellent antibacterial effect

Inactive Publication Date: 2012-11-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mainly manifested in: the lack of in-depth research on the process mechanism of synthesizing nano-zinc oxide and its composites, and the lack of research on the technology of controlling the shape, distribution, particle size, performance, and aggregate control and dispersion of particles; the stability of the process The technical problems of the control of stability and quality repeatability and the storage and transportation of nano-powders have not been well resolved; the development of the application technology of nano-zinc oxide is not enough, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: The preparation method of this polyaniline antibacterial agent, concrete operations are as follows:

[0020] (1) Weigh 1g of sodium hydroxide and dissolve it in 50ml of distilled water, add aniline monomer with a molar concentration of 0.5 mol / L to it, and stir evenly at room temperature to form A liquid; weigh solid ammonium persulfate and dissolve it in distilled water and stir evenly to form liquid B, wherein the molar ratio of aniline to ammonium persulfate is 5:1; quickly pour liquid B into liquid A at room temperature, and let stand at room temperature for 10 h;

[0021] (2) Use vacuum filtration to separate the reaction system in step (1), and wash with distilled water and ethanol in turn until the pH of the washing solution is 7;

[0022] (3) The obtained solid was vacuum-dried at 70 °C for 12 h to obtain the polyaniline antibacterial agent.

[0023] The diameter of the polyaniline fiber obtained by the above comparison experiment is about 80nm, and...

Embodiment 2

[0024] Example 2: The preparation method of this nanometer polyaniline / ZnO composite antibacterial agent, concrete operation is as follows:

[0025] (1) Dissolve 1 g of sodium hydroxide in 50 ml of distilled water, add aniline monomer with a molar concentration of 0.1 mol / L, and stir evenly at room temperature to form liquid A; weigh ammonium persulfate and zinc nitrate solids Dissolve the particles in distilled water and stir evenly to form liquid B, in which the concentration of zinc nitrate is 1 / 20 of the molar concentration of aniline, and the molar ratio of aniline to ammonium persulfate is 10:1; quickly pour liquid B into A at room temperature solution, let stand at room temperature for 8 h;

[0026] (2) Use vacuum filtration to separate the reaction system in step (1), and wash with distilled water and ethanol in sequence until the pH of the washing solution is 7;

[0027] (3) The obtained solid was vacuum-dried at 60 °C for 10 h, and finally the dried solid was furt...

Embodiment 3

[0030] Example 3: The preparation method of this nanometer polyaniline / ZnO composite antibacterial agent, concrete operation is as follows:

[0031] (1) Dissolve 2g of sodium hydroxide in 50ml of distilled water, add aniline with a molar concentration of 0.3 mol / L, and stir evenly at room temperature to form liquid A; weigh ammonium persulfate and zinc nitrate solid particles and dissolve in distilled water, and stir evenly to form liquid B, wherein the concentration of zinc nitrate is 1 / 15 of the molar concentration of aniline, and the molar ratio of aniline to ammonium persulfate is 8:1; quickly pour liquid B into liquid A at room temperature, Stand at room temperature for 10 h;

[0032] (2) Use vacuum filtration to separate the reaction system in step (1), and wash with distilled water and ethanol in turn until the pH of the washing solution is 7;

[0033] (3) The obtained solid was vacuum-dried at 80 °C for 8 h, and finally the dried solid was further vacuum-dried at 17...

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Abstract

The invention discloses a nano polyaniline / ZnO composite antibacterial agent and a preparation method of the nano polyaniline / ZnO composite antibacterial agent. According to the invention, the quick mixing method to synthesize precursor polyaniline / Zn(OH)2 by one step is used, the precursor is dried and then the polyaniline / ZnO composite antibacterial agent is obtained; the polyaniline exists in a nano-fiber manner; zinc oxide exists in a spherical structure with diameter of 20-200nm; the nano polyaniline / ZnO composite antibacterial agent provided by the invention has excellent bactericidal action for different strains such as escherichia coli, staphylococcus aureus and bacillus subtilis. The composite antibacterial agent is low in material cost, simple in preparation and good in thermal stability; the nano ZnO particle has uniform distribution and large specific surface area; the problem that the harmful components such as surfactant, stabilizer and so on are added during the preparation process of the nano ZnO antibacterial agents on the market can be overcome; the antibacterial agent has excellent biocompatibility, has no toxicity and harmfulness for body, is easy to commercially produce and has high economic and social value.

Description

technical field [0001] The invention relates to a polyaniline / ZnO composite antibacterial agent and a preparation method thereof, belonging to the field of antibacterial materials and preparations. technical background [0002] Health has always been one of the topics that people pay the most attention to. People are frequently exposed to a large number of bacteria in their daily work and life. Most of these bacteria are pathogenic bacteria, which directly threaten people's 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 material...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/10A01P1/00
Inventor 陕绍云李丹贾庆明王亚明蒋丽红
Owner KUNMING UNIV OF SCI & TECH
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