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Dedoping-resistant dye-doped polyaniline and preparation method and application thereof

A polyaniline, dedoping technology, applied in the direction of adding dyes in spinning solution, textiles and papermaking, single-component synthetic polymer rayon, etc., can solve the problems affecting the processing performance of polyaniline, dedoping effect, etc., To achieve the effect of improving the resistance to dedoping

Inactive Publication Date: 2012-01-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyaniline with conductivity is obtained by doping the double bond nitrogen and acid in the quinone structure in the polyaniline chain. The dopant usually used is inorganic acid such as hydrochloric acid, sulfuric acid, etc., and the doping made by doping with inorganic strong acid Due to the insolubility and infusibility of polyaniline, the processing performance of polyaniline is greatly affected
[0004] Based on this, the theory of anion-induced processability was developed, and polyaniline doped with organic sulfonic acids such as camphorsulfonic acid (CSA) and p-toluenesulfonic acid (TSA) was developed, which greatly improved the stability of doped polyaniline in organic solvents. Solubility, but this type of conventional organic sulfonic acid doped polyaniline will have a dedoping effect in N-methylpyrrolidone

Method used

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  • Dedoping-resistant dye-doped polyaniline and preparation method and application thereof
  • Dedoping-resistant dye-doped polyaniline and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 180 milliliters of tap water in reaction flask, drop into 5 grams of aniline, stir for 1 hour, obtain aniline aqueous solution, add 0.2 gram of methyl orange again; %wt), be made into hydrochloric acid aqueous solution; Begin to drop about 5 milliliters of hydrochloric acid aqueous solution and stir in the above-mentioned aniline aqueous solution, then dropwise add the aqueous solution that the ammonium persulfate of 12.25 grams is made into in 300 milliliters of water while, continue to drop remaining hydrochloric acid The aqueous solution was added dropwise for about 2 hours, and then reacted for 24 hours, filtered, washed with water, and dried to obtain polyaniline doped with methyl orange and hydrochloric acid. Neutralize the pH value to 8 by adding sodium hydroxide aqueous solution, stir for 24 hours, filter, wash with water, and dry to obtain intrinsic polyaniline;

[0032] When preparing polyaniline doped with organic sulfonic acid with good environmental sta...

Embodiment 2

[0035] The simulated dye wastewater made of methyl orange, the concentration is adjusted at 10 -3 to 10 -6 Between M (mol / L), add 1 gram of intrinsic polyaniline, then add hydrochloric acid, adjust the pH to about 4, stir for 1 minute, the color of the dye in the water will be removed, filter, and reuse the obtained filter cake, continue to add dye aqueous solution Carry out decolorization in the medium until the decolorization effect is lost, filter and dry, and the obtained dye is doped with polyaniline. It carried out ultraviolet-visible spectrum measurement in NMP, and found that its NMP solution was dark green with typical doping state characteristics, and the doping state characteristic peaks appeared in the ultraviolet spectrum, such as figure 1 .

[0036] In this embodiment, the molar ratio of methyl orange and polyaniline in the obtained polyaniline doped with a de-doping-resistant dye is 1:10.

Embodiment 3

[0038] The methyl orange-doped polyaniline obtained in Example 2 was dried to obtain powder and tablet, and it was tested by four-probe method to have electrical conductivity, and the sheet resistance was about 10 3 Level, which is equivalent to the conductivity of TSA-doped polyaniline prepared by in-situ synthesis, which is converted into intrinsic polyaniline after dedoping, and then impregnated with TSA or CSA aqueous solution to obtain the conductivity of doped polyaniline.

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Abstract

The invention belongs to the field of conductive high polymer materials, in particular to dedoping-resistant dye-doped polyaniline and a preparation method and application thereof. A dye-doped conductive polyaniline material is prepared by doping and modifying polyaniline with a doping dye which contains a sulfonic group, a carboxylic group or a metal dentate on the theoretical basis that negative ions can be used for inducing polyaniline processability, can be taken as a corrosion-resistant, pollution-resistant, antibacterial, antistatic, conductive and electromagnetic shielding coating, fiber and the like, and is applied to the fields of metal corrosion prevention, environmentally-friendly treatment, catalysis materials, photoelectric materials, conductive plastic, fiber, biological sensing and the like. In the invention, dye doping of polyaniline can be realized with subsequent doping methods such as in-situ synthetic doping, impregnation doping, thermal doping, grinding doping and the like; and the dye-doped polyaniline has high dedoping resistance in organic solvents such as water, N-methylpyrrolidone (NMP) and the like, even at high temperature, and can be applied in various fields such as photoelectric materials, anti-static electricity, metal corrosion-resistant materials, and the like.

Description

technical field [0001] The invention belongs to the field of conductive polymer materials, and specifically relates to a kind of anti-doping dye-doped polyaniline and its preparation method and application. The dyes containing sulfonic acid groups, carboxylic acid groups and other dopable groups are used to produce Synthetic doping, impregnation doping, thermal doping and grinding doping and other subsequent doping methods to achieve the doping of polyaniline with dyes, the dye-doped polyaniline is weak in water, N-methylpyrrolidone (NMP) It has good resistance to dedoping in alkaline organic solvents, and has good solubility or dispersibility in organic solvents. It can be made into polyaniline conductive coatings for optoelectronic materials, electromagnetic shielding materials, and metal anticorrosion. , antistatic and conductive fibers and other fields. Background technique [0002] Polyaniline has many advantages, such as cheap and easy-to-obtain raw materials, simple ...

Claims

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Application Information

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IPC IPC(8): C08L79/02C09D179/02C09D7/12D01F6/94D01F1/06H01B1/12C09J179/02C09J9/02C10M161/00C10N30/12C10N50/10
Inventor 张彦英孙超石南林张昊宫骏何虹祥
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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