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Polyaniline with electrochemical activity under high-pH value and preparing method

A polyaniline, electrochemical technology, applied in the electrolytic process, electrolytic components, electrolytic organic production and other directions, can solve the problems of difficult application, decreased conductivity of substituted polyaniline, and unsolved polyaniline synthesis. Active, good electroactive effect

Inactive Publication Date: 2006-08-09
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this problem, many researchers have used copolymerization, substituted aniline, etc. to improve its electrochemical activity at higher pH values, which has brought new adverse effects, such as a significant decrease in the conductivity of substituted polyaniline, soluble It is difficult to apply in batteries and biosensors because of water or common organic electrolytes.
So far, the synthesis of intrinsic polyaniline with high electrochemical activity at high pH has not really been solved

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] 1. Raw materials

[0020] Aniline (distilled under reduced pressure to colorless before electrolysis, stored in a refrigerator at 4°C for use), N-methylimidazole (analytical pure), diethyl sulfate (analytical pure)

[0021] 2. Synthesis of ionic liquids

[0022] According to the literature T.Kobayashi, N.Yoneyama, H.Tamura, J.Electroanal.Chem.1984,177,281; C.D.Batich, H.A.Laitinen, H.C.Zhou, J.Electrochem.Soc.1990,137,883. Synthesis of ionic liquid - Ethyl sulfate-1-methyl-3-ethylimidazole, the method is as follows:

[0023] (1) Fully dissolve 15 g of N-methylimidazole in 100 ml of toluene on an ice-water bath.

[0024] (2) Slowly add 34 g of diethyl sulfate to the solution composed of N-methylimidazole and toluene under stirring.

[0025] (3) Continue stirring for 3-6 hours after adding diethyl sulfate, until N-methylimidazole and diethyl sulfate completely react to form ionic liquid——ethyl sulfate-1-methyl-3-ethylimidazole.

[0026] (4) Remove the toluene solution...

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Abstract

This invention relates to PAn with electrochemical reactivity at high pH value and its preparation method, which electrolyzes the electrolyte composed of aniline and ethyl sulfate-1-methyl-3-ethyl imidazole with the constant potential method for 3-8 h, then washes the PAn on the electrode to be dipped in HCl or KCl solution for 1-24 h then washes the dipped high polymerized material with HCl, finally dries it to get PAn, which can be used in conductive polymer cell, enzyme sensor, metal antisepsis, anti-static and electromagnetic shield.

Description

technical field [0001] The invention relates to a preparation technology of electrochemically active polyaniline at high pH. Background technique [0002] For a long time, due to its excellent conductivity, high charge storage capacity and good environmental stability, polyaniline has shown its important application potential in many fields, and has attracted great attention from researchers, such as in plastic batteries, Applications in chemical and biological sensors, light-emitting diodes, metal anti-corrosion, anti-static, electromagnetic shielding, etc. However, the electrical conductivity, energy density, catalytic activity, electrochromism, and energy conversion of polyaniline are all affected by pH. This is because polyaniline almost loses its electrochemical activity when pH>4. In order to solve this problem, many researchers have used copolymerization, substituted aniline, etc. to improve its electrochemical activity at higher pH values, which has brought new ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C25B3/00
Inventor 阚锦晴景国林
Owner YANGZHOU UNIV
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