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Synthesis of one-dimensional polyaniline nanostructures by step-by-step temperature control method

A technology of polyaniline and nanotubes, which is applied in the field of synthesizing high-purity one-dimensional polyaniline nanostructures, can solve the problems that are not conducive to the formation of fiber templates, polyaniline is not a fiber shape, etc.

Inactive Publication Date: 2020-02-21
昭通学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The experimental results show that under the condition of rapid formation of the white precipitate, a large part of the obtained polyaniline is not in the shape of fibers, that is, the white precipitate is not conducive to the formation of "fiber template" before the polymerization of aniline

Method used

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  • Synthesis of one-dimensional polyaniline nanostructures by step-by-step temperature control method
  • Synthesis of one-dimensional polyaniline nanostructures by step-by-step temperature control method

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Experimental program
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Embodiment 1

[0014] 0.4mol.L to 20.00mL at 20.0~25.0℃ -1 Add 0.2mol.L to the aniline solution at one time -1 Aqueous acid solution 20.00mL (containing different proportions of acid), then stirred for 30 minutes, the solution was transparent. Lower the temperature, keep the low temperature after the white precipitate is precipitated, make the temperature of the reaction system 5-50°C lower than the temperature at which the white precipitate begins to precipitate, and mechanically stir for 1-20 hours while maintaining the temperature. Add dropwise 20.00mL containing 0.4mol.L L -1 For the aqueous solution of ammonium persulfate, the ratio of the amount of ammonium persulfate to aniline is 1:1, and the time for dropping the ammonium persulfate solution is 10 to 30 minutes. Stir for an additional 10 minutes after the ammonium persulfate addition is complete. React for 20 hours. Filter, wash with deionized water until colorless, then wash with methanol until colorless, and finally wash with ...

Embodiment 2

[0016] 0.4mol.L to 20.00mL at 20.0~25.0℃ -1 Add 0.2mol.L to the aniline solution at one time -1 Acid ethanol / water solution 20.00mL (containing different proportions of acid), then stirred for 30 minutes, the solution was transparent. Lower the temperature, keep the low temperature after the white precipitate is precipitated, make the temperature of the reaction system 5-50°C lower than the temperature at which the white precipitate begins to precipitate, and mechanically stir for 1-20 hours while maintaining the temperature. Add dropwise 20.00mL containing 0.4mol.L L -1 In the aqueous solution, the ratio of the amount of potassium permanganate and aniline is 1:1, and the time for adding the ammonium persulfate solution dropwise is 10 to 30 minutes. Stir for another 10 minutes after the addition of potassium permanganate is complete. React for 20 hours. Filter, wash with deionized water until colorless, then wash with methanol until colorless, and finally wash with ether t...

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Abstract

The present invention relates to a chemical method for preparing a high-purity one-dimensional polyaniline nanometer structure through a step-by-step temperature control approach. In the method for synthesizing the one-dimensional polyaniline nanometer structure, the self-assembly method is most likely to be applied to the large-scale industrial production while the technology of the self-assembly method is unstable, such that the development and the application of the material are substantially hindered. According to the technical scheme of the present invention, other kinds of acids are added to a solution adopting a binary or ternary acid as the main to form a mixed acid system, the temperature of the acid-alkali reaction between the aniline monomer and the acid and the temperature of the aniline polymerization reaction are respectively controlled in the mixed acid system, and the one-dimensional polyaniline nanometer structure is obtained through the chemical oxidation polymerization method. According to the present invention, the one-dimensional electric conduction polyaniline nano-fibers or nano-tubes have the wide application prospects in the fields of sensors, wave absorbing materials, electronic devices, energy storage, coating materials, catalysis, environmental protection, and the like.

Description

technical field [0001] The invention relates to a chemical method for synthesizing a high-purity one-dimensional polyaniline nanostructure. Background technique [0002] Due to its wide range of conductivity, large specific surface area, diverse structures, good environmental stability, low cost, and easy synthesis, conductive polyaniline one-dimensional nanofibers or nanotubes are widely used in sensors, wave-absorbing materials, electronic devices, and energy sources. Potential applications in areas such as storage, coatings, catalysis, and environmental protection have attracted widespread interest. The preparation methods of one-dimensional polyaniline nanostructures include template method, electrospinning method, interfacial polymerization method, chemical self-assembly method, on-site adsorption polymerization method, electrochemical method and so on. Among these methods, the chemical self-assembly method does not require special equipment, and does not require organ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02
Inventor 杨永胜
Owner 昭通学院