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Polyaniline nano fiber and its preparing process

A nanofiber, polyaniline technology, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking, etc., to achieve the effect of easy mass production, easy shape, and surface diversification

Inactive Publication Date: 2007-07-11
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the complex post-processing problems caused by the removal of templates, surfactants and organic solvents in the preparation of polyaniline nanofibers, the present invention proposes a chemical oxidation polymerization using vanadic acid as an oxidant to prepare polyaniline nanofibers. The fiber method, the method does not involve any template, surfactant and organic solvent in the preparation process, the process is simple, the shape of polyaniline nanofibers is easy to control, and it is easy to carry out mass production

Method used

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  • Polyaniline nano fiber and its preparing process
  • Polyaniline nano fiber and its preparing process

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specific Embodiment approach 1

[0018] A method for preparing polyaniline nanofibers by chemical oxidative polymerization with vanadic acid as an oxidant, comprising the following sequential steps:

[0019] (1) Fully mix vanadium pentoxide hydrochloric acid aqueous solution and aniline hydrochloric acid aqueous solution according to vanadium pentoxide and aniline molar ratio of 1:1, and control the molar concentration of hydrochloric acid in the mixed solution to be 0.1-0.5mol / L. React for 1 to 10 hours to obtain a polymer product;

[0020] (2) The above reaction product was centrifuged, washed three times with water and ethanol, and then dried at room temperature for 24 hours to obtain dark green polyaniline nanofibers.

specific Embodiment approach 2

[0021] A method for preparing polyaniline nanofibers by chemical oxidative polymerization with vanadic acid as an oxidant, comprising the following sequential steps:

[0022] (1) The vanadium pentoxide fluoroboric acid aqueous solution and the aniline hydrochloric acid aqueous solution are fully mixed according to the vanadium pentoxide and aniline molar ratio of 1:2, and the molar concentration of hydrochloric acid in the mixed solution is controlled to be 0.5-2mol / L, and then after 3-5 ℃ for 8 to 18 hours to obtain a polymer product;

[0023] (2) The above reaction product was centrifuged, washed with water to remove impurities, and dried at room temperature for 24 hours to obtain dark green polyaniline nanofibers.

specific Embodiment approach 3

[0024] A method for preparing polyaniline nanofibers by chemical oxidative polymerization with vanadic acid as an oxidant, comprising the following sequential steps:

[0025] (1) Fully mix vanadium pentoxide hydrochloric acid aqueous solution and aniline phosphoric acid aqueous solution according to the vanadium pentoxide and aniline molar ratio of 1:4, and control the molar concentration of hydrochloric acid in the mixed solution to be 0.5-2mol / L, and react at 0-5°C 10~24 hours, obtain polymerization product;

[0026] (2) The above reaction product was centrifuged, washed with water and ethanol to remove impurities, and dried at room temperature for 24 hours to obtain dark green polyaniline nanofibers.

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Abstract

The invention discloses a polyaniline nanometer fiber and making method, which comprises the following steps: blending inorganic solution of vanadic anhydride and inorganic acid solution of phenylamine with molar rate at 1 1-14 completely; controlling the molar density of inorganic acid at 0.1-2mol / L; reacting at 0-5 deg. c for 1-24h; obtaining the polymer product; centrifuging; washing; drying to obtain the product.

Description

technical field [0001] The invention relates to a method for preparing polyaniline nanofibers, in particular to a method for preparing polyaniline nanofibers by chemical oxidation polymerization using vanadic acid as an oxidant. The present invention further relates to polyaniline nanofibers prepared by the method described above. Background technique [0002] Polyaniline is a conductive polymer with conjugated double bonds. Due to the simple non-redox doping / dedoping properties, polyaniline is very unique among numerous conducting polymers. After simple acid / alkali doping treatment, its conductivity can be changed from the original σ<10 -10 S / cm (insulator) is increased to σ>1S / cm (conductor). Polyaniline, which is conventionally prepared chemically or electrochemically, is usually spherical particles. One-dimensional polyaniline nanofibers have the advantages of both organic conductors and low-dimensional nanostructures, and have become one of the research hotspo...

Claims

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Application Information

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IPC IPC(8): C08G73/02D01F6/76
Inventor 李桂村王兆波谢广文彭红瑞张志焜
Owner QINGDAO UNIV OF SCI & TECH
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