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Method for preparing fusible conductive polyaniline

A conductive polyaniline, soluble technology, applied in the field of conductive polymer material preparation, can solve the problems of difficult mixing uniformity, low doping efficiency, environmental pollution, etc., to overcome uneven doping reaction, uniform doping reaction, doping high degree of effect

Inactive Publication Date: 2005-02-16
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires a large amount of organic solvents and precipitants, which not only increases the cost, but also pollutes the environment, and the yield is low
(2) The intrinsic state polyaniline is prepared first, and then doped with a macromolecular organic protonic acid, but the existing doping technology uses the two directly mixed doping or doping in an organic solvent. Polyaniline and macromolecular organic protonic acid are directly mixed and doped, and the two are difficult to mix evenly, resulting in uneven doping degree of polyaniline and poor doping effect; if doping in organic solvent, part of organic protonic acid will detach from poly The main chain of aniline exists alone in the organic solvent in a free state without doping effect, so the stability of the obtained product is poor, the doping efficiency is low, and it pollutes the environment at the same time
Above-mentioned method all is difficult to carry out suitability for industrialized production
Therefore, we believe that the preparation of soluble conductive polyaniline has not yet been perfectly solved.

Method used

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  • Method for preparing fusible conductive polyaniline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Put 165.6ml of water, 12.0g of aniline and 12.6ml of hydrochloric acid in a three-necked flask, and gradually add 50ml of ammonium persulfate solution (containing 22.5g of ammonium persulfate) dropwise under strong stirring. React at room temperature for 12 hours. Filter and wash repeatedly to obtain dark green polyaniline. (2) The obtained polyaniline was placed in 200 g of 10% ammonia solution, stirred for 4 hours, filtered, washed repeatedly with water until the pH was 7, and vacuum-dried to obtain 10.1 g of intrinsic state polyaniline with a yield of 84%. (3) Take 4.0g intrinsic polyaniline, 12.4g dodecylbenzenesulfonic acid (DBSA), 180ml water and 25ml ethanol (cosolvent) and place them in a three-necked flask, heat doping under reflux for 4h, and After the water and ethanol are evaporated, vacuum drying is carried out to obtain DBSA-doped soluble conductive polyaniline. Its electrical conductivity is 24.8 S / cm, its solubility in xylene is 94.6%, and its ther...

Embodiment 2

[0024] Repeat the process of Example 1, replace dodecylbenzenesulfonic acid with 8.8g camphorsulfonic acid (CSA), replace ethanol with 25ml NMP, obtain CSA-doped soluble conductive polyaniline. Its electrical conductivity is 324.6 S / cm, its solubility in xylene is 92.4%, and its thermal stability measured by TG is 205°C.

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Abstract

An electrically conducting soluble polyphenylamine is prepared by hot doping between the polyphenylamine is eigen state and macromolecular functional Bronsted acid in the mixed solvent of water and cosolvent. Its advantages are less environmental pollution, high output, and high solubility, thermal stability and electric conductivity of product.

Description

technical field [0001] The invention relates to a method for preparing a conductive polymer material, in particular to a method for preparing a conductive polyaniline material. Background technique [0002] Among the many conductive polymer materials, polyaniline is considered to be the most promising conductive polymer due to its diverse structure, unique doping mechanism, excellent physical and chemical properties, cheap and easy-to-obtain raw materials, and simple preparation process. Material. [0003] Intrinsic polyaniline has no conductivity, and it must be doped with other substances to become conductive. Considering the ease of processing and solubility of the doped materials, the doping substances currently used are macromolecular organic protonic acids, and there are two main types of doping methods: (1) the emulsion synthesis method, that is, in water- Synthesized in xylene-macromolecular organic protonic acid system. This method requires a large amount of orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02
Inventor 王庚超闾兴圣苏静
Owner EAST CHINA UNIV OF SCI & TECH
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