Method for preparing water-soluble conductive polyaniline

A conductive polyaniline, water-soluble technology, applied in the field of photoelectric polymer materials, can solve the problems of harsh process conditions, expensive auxiliary raw materials, etc., and achieve the effect of good doping, low raw material price and high molecular weight

Inactive Publication Date: 2010-08-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many synthetic methods for preparing water-soluble conductive polyaniline, such as chemical oxidative polymerization, electrochemical polymerization, condensation polymerization...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Aniline was distilled under reduced pressure at 95°C, and distilled twice.

[0020] 2) Under the conditions of ice-water bath and mechanical stirring, add 1 mL of aniline monomer to 25 mL of deionized water dissolved with 2.63 g of dodecylbenzenesulfonic acid, add 25 mL of ethanol, and stir for 30 min. The reaction system changes from white emulsion to no Color transparent liquid.

[0021] 3) Slowly add ammonium persulfate (2.49g dissolved in 10mL water) solution dropwise at 0-5°C, stir for 1 hour, the reaction system turns from colorless to white slowly, then blue soon, and finally dark green .

[0022] 4) Put the reaction system into a container at 5°C and fully react for 48 hours.

[0023] 5) Suction filtration, washing with ethanol / water to obtain a dark green filter cake, and vacuum drying at 40° C. to obtain a dark green powder.

[0024] The polyaniline prepared in this embodiment is characterized by gel permeation chromatography (GPC), and the number averag...

Embodiment 2

[0026] 1) Aniline was distilled under reduced pressure at 95°C, and distilled twice.

[0027] 2) Under the conditions of ice-water bath and mechanical stirring, add 1 mL of aniline monomer to 30 mL of deionized water dissolved with 2.63 g of dodecylbenzenesulfonic acid, add 20 mL of ethanol, and stir for 30 min. The reaction system changes from white emulsion to no Color transparent liquid.

[0028] 3) Slowly add ammonium persulfate (2.49g dissolved in 10mL water) solution dropwise at 0-5°C, stir for 1 hour, the reaction system changes from colorless to white slowly, then blue soon, and finally dark green .

[0029] 4) Put the reaction system into a container at 5°C and fully react for 48 hours.

[0030] 5) Suction filtration, washing with ethanol / water to obtain a dark green filter cake, and vacuum drying at 40° C. to obtain a dark green powder.

[0031] The polyaniline prepared in this embodiment is characterized by gel permeation chromatography (GPC), and the number aver...

Embodiment 3

[0033] 1) Aniline was distilled under reduced pressure at 95°C, and distilled twice.

[0034] 2) Under the conditions of ice-water bath and mechanical stirring, add 1 mL of aniline monomer to 10 mL of deionized water dissolved with 2.63 g of dodecylbenzenesulfonic acid, add 40 mL of ethanol, and stir for 30 min. The reaction system changes from white emulsion to no Color transparent liquid.

[0035] 3) Slowly add ammonium persulfate (2.49g dissolved in 10mL water) solution dropwise at 0-5°C, stir for 1 hour, the reaction system changes from colorless to white slowly, then blue soon, and finally dark green .

[0036] 4) Put the reaction system into a container at 5°C and fully react for 48 hours.

[0037] 5) Suction filtration, washing with ethanol / water to obtain a dark green filter cake, and vacuum drying at 40° C. to obtain a dark green powder.

[0038] The polyaniline prepared in this embodiment is characterized by gel permeation chromatography (GPC), and the number aver...

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Abstract

The invention relates to a method for preparing water-soluble conductive polyaniline. The water-soluble conductive emeraldine imino polyaniline is synthesized by adopting microemulsion polymerization in an ice-water bath, and taking aniline as a monomer, ammonium persulphate as an initiator, dodecylbenzene sulfonic acid as a doping agent and emulsifying agent and ethanol as an assistant emulsifying agent. The preparation method comprises the following steps: under the conditions of the ice-water bath and stirring, adding the aniline into aqueous solution of the dodecylbenzene sulfonic acid (the molar ratio of the aniline to the dodecylbenzene sulfonic acid is 1:1-1:2), adding the ethanol (the volume ratio of the ethanol to deionized water is 1:4-4:1), stirring for 30 minutes, ensuring that the concentration of the aniline in the system is 0.15 to 0.3mol/L, adding 1mol/L aqueous solution of ammonium persulphate (the molar ratio of the ammonium persulphate to the aniline is 1:1-1:1.25), and stirring for 60 minutes; and adding the reaction system to a container with the temperature of between 0 and 5 DEG C, performing reaction for 48 hours, pumping and filtering, washing the reactant with ethanol/water to obtain a filter cake, and drying the filter cake under vacuum to obtain dark green powder.

Description

technical field [0001] The invention belongs to the field of optoelectronic polymer materials, and relates to a preparation method of large molecular weight water-soluble high-conductivity polyaniline. Background technique [0002] Polyaniline (PANI) has excellent electrical, optical and electrochemical properties and excellent environmental stability, and the monomer aniline (AN) for preparing polyaniline is cheap and easy to obtain, and the synthesis process is simple, so it is considered to be very likely to be commercialized. One of the optoelectronic polymer materials. But its application in the field of optoelectronics largely depends on its formability. Due to the presence of benzene rings on polyaniline chains, interchain hydrogen bond interactions, and charge delocalization effects, the polymer is insoluble and infusible, which seriously hinders its large-scale application in the field of optoelectronics. Polyaniline is a high polymer with delocalized electronic c...

Claims

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Application Information

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IPC IPC(8): C08G73/02
Inventor 贺英钱明君宋继中陈杰朱棣赵鑫杨程汪强裴昌龙
Owner SHANGHAI UNIV
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