A microwave-assisted method for preparing aniline-pyrrole copolymers

A pyrrole copolymer and microwave-assisted technology, which is applied in the field of microwave-assisted preparation of aniline-pyrrole copolymers, can solve the problems of long time for the reaction system to reach thermal equilibrium, difficulty in determining electrode potential matching, and difficulty in controlling the composition of the copolymer, and promote uniformity. The effect of orderly growth, small steric hindrance, and improved conductivity

Active Publication Date: 2020-11-10
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the aniline monomer has a six-membered ring structure and has low activity, while the pyrrole monomer has a five-membered ring structure and has a high activity, it is difficult to determine a suitable oxidant or select a suitable electrode potential to match the reaction of the two, and its copolymer composition Difficult to control, and the microstructure of aniline-pyrrole copolymer is coral-like, relatively low electrochemical activity, small specific capacitance and low cycle life
[0003] In the field of polymer synthesis, the traditional heating method is usually used for polymerization reaction. Due to the influence of bottle wall effect and temperature gradient during the heat transfer process, the time for the reaction system to reach thermal equilibrium is too long, resulting in too long polymerization time and energy consumption. larger

Method used

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  • A microwave-assisted method for preparing aniline-pyrrole copolymers
  • A microwave-assisted method for preparing aniline-pyrrole copolymers
  • A microwave-assisted method for preparing aniline-pyrrole copolymers

Examples

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Embodiment 1

[0035] The preparation method of the present embodiment comprises the following steps:

[0036] Step 1. Add 0.01mol pyrrole, 0.01mol aniline and 0.02mol hydrochloric acid into 200mL deionized water, and then ultrasonically disperse for 30min to obtain mixed solution A;

[0037] Step 2: Add 0.02mol hydrogen peroxide and 0.2mmol silver nitrate into 200mL deionized water, and then ultrasonically disperse for 30min to obtain mixed solution B;

[0038]Step 3. Add the mixed solution B obtained in step 2 dropwise to the mixed solution A obtained in step 1 and stir evenly, then react under microwave-assisted conditions to obtain a slurry containing precipitation; the power of the microwave Be 100W, the time of described reaction is 120min;

[0039] Step 4, centrifuge the slurry obtained in step 3 and collect the precipitate, then wash the precipitate with ethanol and distilled water respectively, then centrifuge and collect the precipitate until the centrifuged supernatant is colorle...

Embodiment 2

[0042] The preparation method of the present embodiment comprises the following steps:

[0043] Step 1. Add 0.02mol of pyrrole, 0.02mol of aniline and 0.2mol of hydrochloric acid into 200mL of deionized water, and then ultrasonically disperse for 30min to obtain mixed solution A;

[0044] Step 2: Add 0.04mol ammonium persulfate, 0.01mol Tween-80, and 0.4mmol ferrous chloride into 200mL deionized water, and then ultrasonically disperse for 30min to obtain mixed solution B;

[0045] Step 3. Add the mixed solution B obtained in step 2 dropwise to the mixed solution A obtained in step 1 and stir evenly, then react under microwave-assisted conditions to obtain a slurry containing precipitation; the power of the microwave Be 100W, the time of described reaction is 120min;

[0046] Step 4, centrifuge the slurry obtained in step 3 and collect the precipitate, then wash the precipitate with ethanol and distilled water respectively, then centrifuge and collect the precipitate until the...

Embodiment 3

[0049] The difference between this embodiment and embodiment 2 is that: the acid described in step 1 is sulfuric acid; the oxidant described in step 2 is potassium persulfate, and the power of the microwave described in step 3 is 300W.

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Abstract

The invention discloses a method for preparing an aniline-pyrrole copolymer under assistance of microwaves. The method comprises steps as follows: 1, pyrrole, aniline and acid are added to deionized water for ultrasonic dispersion, and a mixed solution A is obtained; 2, an oxidizing agent, a surfactant and a catalyst are added to the deionized water for ultrasonic dispersion, and a mixed solutionB is obtained; 3, the mixed solution B is dropwise added to the mixed solution A for a microwave-assisted reaction, and slurry containing precipitates is obtained; 4, the slurry is centrifuged, the precipitates are collected, washing, centrifugation and vacuum drying are performed sequentially, and the aniline-pyrrole copolymer is obtained. The aniline-pyrrole copolymer is prepared under assistance of the microwaves, uniform and ordered growth of aniline and pyrrole molecules is promoted through radiation heating of aniline, pyrrole molecules and water by use of microwaves, the obtained aniline-pyrrole copolymer has a relatively loose 3D ordered structure and fewer defects, so that the pseudocapacitance of the aniline-pyrrole copolymer as an electrode material is improved, the cycle life of the aniline-pyrrole copolymer is prolonged, and the electric conductivity is improved.

Description

technical field [0001] The invention belongs to the technical field of copolymer preparation, and in particular relates to a microwave-assisted preparation method of aniline-pyrrole copolymer. Background technique [0002] The homopolymers and copolymers of conductive polymer homopolymers and copolymers and their derivatives are mostly prepared by low-temperature chemical oxidation or electrochemical deposition. membrane. Since the aniline monomer has a six-membered ring structure and has low activity, while the pyrrole monomer has a five-membered ring structure and has a high activity, it is difficult to determine a suitable oxidant or select a suitable electrode potential to match the reaction of the two, and its copolymer composition It is difficult to control, and the microstructure of aniline-pyrrole copolymer is coral-like, with relatively low electrochemical activity, small specific capacitance and low cycle life. [0003] In the field of polymer synthesis, the trad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08G73/06
CPCC08G73/0266C08G73/0611
Inventor 杨庆浩
Owner XIAN UNIV OF SCI & TECH
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