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Method for direct preparation of polyaniline solution from aniline monomer

A kind of technology of aniline monomer and polyaniline, which is applied in the field of directly preparing polyaniline solution by using aniline monomer, can solve the problems of complex post-processing procedures, low doping efficiency, and difficult control of conductivity, and achieve easy storage, transportation, and production The effect of simple process and reliable performance

Inactive Publication Date: 2005-02-23
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome and solve the polyaniline produced by the existing synthesis process, the difficult problem of decoupling of polyaniline doping and the preparation of polyaniline solution, and solve the problems of low degree of combination, low doping efficiency, complicated post-treatment procedures, There are many reaction by-products, poor product performance stability, and difficult to control electrical conductivity. The research provides a method of high synthesis efficiency, simple process, and direct synthesis of polyaniline solution with aniline monomer. The solution has good long-lasting stability.

Method used

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  • Method for direct preparation of polyaniline solution from aniline monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 2.04g of aniline monomer, 8.58g of dodecylbenzenesulfonic acid, 100ml of xylene, and 400ml of deionized water into the reaction kettle, and stir vigorously for 1 hour to form milk. Continue stirring, and slowly add 5.5g of ammonium persulfate (10 % solution), reacted at room temperature (25° C.) for 5 hours, after the reaction was finished, 200 ml of acetone was added dropwise to break the emulsion, stood still for 1 hour, separated, the organic phase was washed with 200 ml of deionized water, and the aqueous phase was separated, and the organic phase was containing 4.32% polyaniline dark green stable solution, after evaporation and recovery of 50ml of xylene, a polyaniline solution containing 8.64% was obtained, continued evaporation and recovery of xylene until nearly dry, dried in an oven at a temperature of 60°C to a constant weight to obtain 4.32g of dark green DBSA-doped polyaniline. The conductivity of the doped polyaniline measured in a four-electrode condu...

Embodiment 2～6

[0028] Example

Embodiment 7～9

[0030] Change the add-on of aniline, change the organic solvent that adds, respectively use 100ml of N-methylpyrrolidone, N, N-dimethylformamide and carbon tetrachloride, others are the same as Example 1, the results are shown in the following table. As can be seen from the table, with N,N-dimethylformamide as solvent, its yield is higher than that of other solvents, but the electrical conductivity is all lower than other example products.

[0031] Example (solvent)

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Abstract

A direct preparation of polyaniline solution from aniline monomer is carried out by: adding aniline monomer, water, emulsifier, organic solvent in certain ratio into a reactor, stirring fiercely to form emulsifying liquid, controlling reactive condition, adding oxidant to make emulsifying liquid after reaction finished, adding an emulsion breaker to produce a uniformity solution, settling to separate, removing water-phase, washing and separating, removing organic-phase solvent partly or completely through evaporation to obtain different concentration polyaniline or solid polyaniline. The polyaniline solution prepared by above method has excellent electrochemical performance and chemical stability, controllable conductivity. The synthesis is simple, and can be used in photoelectron appliance, transducers, molecular wires, and molecular appliance, electromagnetic shielding materials, metal anti-corrosion and stealth technology.

Description

technical field [0001] The invention relates to a method for directly preparing polyaniline solution by utilizing aniline monomer and a solvent system used therein. Background technique [0002] Polyaniline is the most promising conductive polymer. It has excellent electrochemical performance and chemical stability, unique doping and dedoping mechanism, easy to obtain raw materials, and simple synthesis method. It is widely used in energy, optoelectronic devices, information, sensors, molecular wires and molecular devices, and electromagnetic Shielding, metal anti-corrosion and stealth technology have broad and attractive application prospects. The research on polyaniline at home and abroad attaches great importance, and a large number of articles are published every year. However, due to the poor solubility of polyaniline, its practical application in some special occasions is limited. It is very important to improve the processability of polyaniline, especially the solubi...

Claims

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Application Information

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IPC IPC(8): C08G73/02
Inventor 潘孝兵万俊生肖艳
Owner NORTHWEST INST OF NUCLEAR TECH
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