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Aqueous polyaniline and preparation method thereof

A water-based polyaniline and aniline technology, applied in the field of polymer materials, can solve problems such as being unable to meet the needs of environmental friendliness, small specific surface area of ​​products, and need to be improved.

Active Publication Date: 2012-05-02
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the polyaniline prepared according to the above method has the following two problems: one is that the specific surface area of ​​the product is small, which still needs to be improved; needs

Method used

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  • Aqueous polyaniline and preparation method thereof
  • Aqueous polyaniline and preparation method thereof
  • Aqueous polyaniline and preparation method thereof

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preparation example Construction

[0040] The embodiment of the invention discloses a preparation method of water-based polyaniline, comprising:

[0041] Add aniline into the doping acid solution, and configure an aniline salt solution with a concentration of 1mol / L to 3mol / L, and the doping acid is a phosphate ester containing an ethoxy group or a sulfonate ester containing an ethoxy group ;

[0042] Dissolving the oxidizing agent in water and preparing an oxidizing agent solution with a concentration of 1mol / L to 3mol / L, the oxidizing agent is ferric nitrate, ferric chloride, ferric sulfate or copper chloride;

[0043] At 0°C to 5°C, the aniline salt solution and the oxidant solution were added dropwise and mixed at a constant speed according to the molar ratio of the aniline to the oxidant being 1: (1.2 to 15), and the mixed solution was mixed at -30°C to 10°C Stand still at ℃ to obtain water-based polyaniline.

[0044] In order to improve the hydrophilicity of polyaniline and prepare water-based polyanili...

Embodiment 1

[0077] Step 1, under stirring condition, dissolve aniline monomer in 1mol / L doping acid solution, make the aniline salt aqueous solution that molar concentration is 1mol / L, doping acid has structural formula (I), m in formula (I) = 1;

[0078] Formula (I)

[0079] Step 2, under stirring conditions, ferric nitrate is dissolved in deionized water to form a 1mol / L ferric nitrate aqueous solution;

[0080] Step 3, by the molar ratio of substance is aniline: ferric nitrate=1: 3, at 0~5 ℃, the doping acid solution that step 1 obtains and the ferric nitrate solution that step 2 obtains with the speed of 35~50mL / min Add it dropwise into the reactor, after the dropwise addition is completed, stop stirring, keep the temperature at 0-5°C, and let it stand still for 24 hours;

[0081] Step 4, after filtering the reaction product obtained in step 3, wash with deionized water and methanol respectively until the filtrate is colorless;

[0082] Step 5, vacuum drying the product obtained ...

Embodiment 2

[0088] Step 1. Under stirring conditions, dissolve the aniline monomer in 1mol / L doping acid to make an aniline salt solution with a molar concentration of 1mol / L. The doping acid has the structural formula (III), and m=7 in the formula (III) ;

[0089] Formula (III)

[0090] Step 2, under stirring conditions, ferric nitrate is dissolved in deionized water to form a 1mol / L ferric nitrate aqueous solution;

[0091] Step 3, by the molar ratio of substance is aniline: ferric nitrate=1: 3, at 0~5 ℃, the doping acid solution that step 1 obtains and the ferric nitrate solution that step 2 obtains with the speed of 35~50mL / min Add it dropwise into the reactor, after the dropwise addition is completed, stop stirring, keep the temperature at 0-5°C, and let it stand still for 24 hours;

[0092] Step 4, after filtering the reaction product obtained in step 3, wash with deionized water and methanol respectively until the filtrate is colorless;

[0093] Step 5, vacuum drying the produ...

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Abstract

The invention provides aqueous polyaniline and a preparation method thereof. The method comprises the following steps: adding aniline into a doped acid solution so as to prepare an aniline salt solution with a concentration of 1 mol / L to 3 mol / L, wherein, doped acid is phosphate ester containing ethoxy groups or sulfonate containing ethoxy groups; dissolving an oxidizing agent in water so as to prepare an oxidizing agent solution with a concentration of 1 mol / L to 3 mol / L, wherein, the oxidizing agent is ferric nitrate, ferric trichloride, ferric sulfate or cupric chloride; at a temperature of -30 to 10 DEG C, dropwise mixing the aniline salt solution with the oxidizing agent solution according to a mol ratio of aniline to the oxidizing agent of 1: 1.2-15 at a constant speed, and standinga mixed solution obtained after uniform mixing at a temperature of -30 to 10 DEG C so as to obtain aqueous polyaniline. Aqueous polyaniline prepared by using the method has a large specific surface area and excellent water-solubility thanks to a regular line style structure.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a water-based polyaniline and a preparation method thereof. Background technique [0002] Polyaniline is an important conductive polymer. The main chain of polyaniline contains alternating benzene rings and nitrogen atoms. It not only has the density and processability of plastics, but also has the conductivity of metals. It is widely used as anti-corrosion coatings, electromagnetic shielding materials, electrode materials for secondary batteries, High temperature materials, solar materials and separation membranes, etc. In particular, polyaniline has a high specific surface area, which makes it an important application prospect in the fields of electronic devices, sensors and supercapacitors, and has attracted widespread attention. [0003] At present, the synthesis of polyaniline with high specific area is mainly polyaniline microspheres and polyaniline nanofibers with nanost...

Claims

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Application Information

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IPC IPC(8): C08G73/02
Inventor 张红明李季王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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