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Process for synthesizing electron donor substituted polyaniline derivatives

A synthesis method and technology of polyaniline, applied in the field of synthesis of conductive polymers, can solve the problems of high emulsifier concentration, difficulty in product purification, high production cost, etc., and achieve the effects of increasing molecular weight, little influence on conductivity, and improving solubility and processability

Inactive Publication Date: 2005-09-14
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the polymerization process, a lower amount of oxidant (initiator) is used, the heat of polymerization is effectively dispersed in the water phase to avoid local overheating, and the viscosity of the system changes little, which is beneficial to increase the molecular weight of the polymer; however, the concentration of the emulsifier in the emulsion polymerization system is large, which is not easy It is completely removed, which brings many difficulties to the purification of the product, and requires a large amount of organic solvents and precipitants, and the preparation cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 100mL deionized water into the three-necked bottle, add sodium dodecyl sulfate (SDS) 5×10 -3 mol, keep stirring, until the dissolution is complete, slowly drop 20mL of 2,5-dimethoxyaniline (DMAn, CP) xylene solution with a concentration of 0.2mol / L, under nitrogen protection, when the temperature is raised to 85°C, then will be 5.0×10 -5 Dissolve mol potassium persulfate (KPS) in 30mL aqueous solution, slowly add the reaction system with a dropping funnel under stirring, continue the reaction for 4h, stop heating, change the reactor to a distillation device, distill out xylene, break the emulsion, pump Filter and wash repeatedly with deionized water until the filtrate is free of foam. Then wash with ethanol until the filtrate is colorless, and dry in vacuum at 60°C to obtain dark brown intrinsic polymer PDMAn(ud). The above product was placed in 18% hydrochloric acid solution, stirred, heated to boiling, continued to stir for 48 h, filtered with suction, washed re...

Embodiment 2

[0025] Add 100mL deionized water into the three-necked bottle, add sodium dodecyl sulfate (SDS) 10×10 -3 mol, keep stirring, until the dissolution is complete, slowly drop 30mL of 2,5-dimethoxyaniline (DMAn, CP) xylene solution with a concentration of 0.2mol / L, under the protection of argon, when the temperature rises to 90°C , and then the 7.5×10 -5 mol ammonium persulfate (APS) was dissolved in 30mL permanent solution, slowly added to the reaction system with a dropping funnel under stirring, continued to react for 6h, stopped heating, added 30mL of 36% HCl to break the emulsion, suction filtered, and washed repeatedly with deionized water until The filtrate was free of foam. Then wash with ethanol until the filtrate is colorless, and dry in vacuum at 60°C to obtain dark brown intrinsic polymer PDMAn(ud). Put the above product in 2mol / L perchloric acid solution, stir, continue to stir at room temperature for 72h, filter with suction, wash repeatedly with deionized water an...

Embodiment 3

[0027] Add 100mL deionized water into the three-neck flask, add sodium dodecylsulfonate (SDS) 1.5×10 -3 mol, keep stirring, until it is completely dissolved, slowly add 10mL of 2,5-dimethoxyaniline (DMAn, CP) xylene solution (0.2mol / L) dropwise, under the protection of nitrogen, when the temperature is raised to 60°C, then will be 3.0×10 -5Dissolve mol potassium persulfate (KPS) in 30mL aqueous solution, slowly add to the reaction system with a dropping funnel under stirring, continue to react for 2h, stop heating, wait to cool to room temperature, add 100mL methanol to break the emulsion, filter with deionized water repeatedly Wash until the filtrate is free of foam. Then wash with ethanol until the filtrate is colorless, and dry in vacuum at 60°C to obtain dark brown intrinsic polymer PDMAn(ud). Put the above product in 2mol / L p-toluidine (TSA) solution, stir, heat to boiling, continue to stir for 48h, filter with suction, wash repeatedly with deionized water and methanol ...

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Abstract

This invention is synthesis method of supply electron naphthylmercuric replacing polyanion derivant. It relates the synthesis method of supply electron naphthylmercuric replacing electron conduction polyanion derivant poly-2, 5-dimethoxyaniline. This invention provides the synthesis method of supply electron naphthylmercuric replacing polyanion derivant. Supply electron naphthylmercuric replacing polyanion derivant. Poly-2, 5-dimethoxyaniline is synthesized through emulsion polymerization, deionized water and emulsifying agent is added in tank and heated dissolve. Xylene solution of 2, 5-dimethoxyaniline is added with protection of nitrogen gas. Potassium persulphate and ammonium persulfate solution is dissolved in water and then added to reaction system. The tank is changed into distillation plant to make emulsion breaking, then through filtration, scrubbing, drying. Improving the dissolve workability of polyaniline has little affection to conductivity. Polymer over oxidation, crosslinking, degradation by electrochemistry polyreaction is avoide, polymerisate molecular weight can be improved, and half oxidation state polymer of good electrochemistry is got. Polymer film of certain conductivity and thickness is easy to get, it is good to decorate electrode.

Description

technical field [0001] The invention relates to the synthesis of a conducting polymer, in particular to a synthesis method of poly-2,5-dimethoxyaniline, an electron-donating group-substituted electron-conducting polyaniline derivative. Background technique [0002] Electron-conducting polymers have long-chain conjugated structures, among which are typical conjugated polymers with aromatic heterocycles as basic structural units, such as polyaniline (PAn), polypyridine (Ppy), polythiophene (PTh), polyfuran etc. Compared with polyacetylene, these polymers are more stable in air and easier to chemically modify. Among them, polyaniline has the advantages of low monomer price, simple synthesis process, special doping mechanism, good electrical conductivity, excellent environmental stability, reversibility and controllability of electrical conductivity, etc., and exhibits specific optical and electrical properties. , Magnetic properties have become an important research direction...

Claims

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Application Information

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IPC IPC(8): C08G73/02
Inventor 戴李宗许一婷陈江枫吴辉煌
Owner XIAMEN UNIV
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