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Preparation method of water-soluble polyaniline

A polyaniline, water-soluble technology, applied in the field of preparation of water-soluble polyaniline, can solve the problem of low degree of copolymer grafting, large steric hindrance of methoxy polyethylene glycol o-aminophenyl ether, and difficult grafting rate. control and other issues, to achieve the effects of easy process control, high atomic utilization, and easy separation and purification

Active Publication Date: 2016-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported in the literature that PAn-g-PEG graft copolymers are prepared by copolymerization of aniline and methoxypolyethylene glycol o-aminophenyl ether, but the method uses methoxypolyethylene glycol o-aminophenyl ether The resistance is large, and there are problems such as low degree of grafting of the copolymer and difficulty in controlling the grafting rate.

Method used

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  • Preparation method of water-soluble polyaniline

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Effect test

Embodiment 1

[0027] Dissolve 14.88g of aniline, 5.0g of o-aminothiophenol, and 6.53g of dodecylbenzenesulfonic acid into 200mL of water, stir evenly, and keep the temperature at 0°C for 30min to prepare an aniline aqueous solution. Dissolve 22.8g of ammonium persulfate in 140mL of 0.5mol / L hydrochloric acid, stir well and keep the temperature at 0°C for 30min. The above two solutions were mixed and reacted at 0°C for 3 hours to obtain low molecular weight water-soluble polyaniline.

[0028] Adjust the pH of the above reaction solution to 8~9 with ammonia water, add 4.0g triethylamine and 15.0g polyethylene glycol methacrylate (molecular weight: 300), heat the reaction solution to 70°C, and react for 3 hours. After the reaction, cool down to 0°C, add 8mL of concentrated hydrochloric acid and 22.8g of ammonium persulfate, and react at 0°C for 12 hours. After the reaction, pour the reaction solution into 1000mL of acetone for precipitation. Vacuum dried for 24 hours to obtain water-soluble p...

Embodiment 2

[0030] Dissolve 14.88g of aniline and 7.5g of o-aminothiophenol into 200mL of water, stir evenly, and keep the temperature at 0°C for 30min to prepare an aqueous solution of aniline. Dissolve 25.8g of ammonium persulfate in 100mL of 1.0mol / L hydrochloric acid, stir well and keep the temperature at 0°C for 30min. The above two solutions were mixed and reacted at 0°C for 3 hours to obtain low molecular weight water-soluble polyaniline.

[0031] Adjust the pH of the above reaction solution to 8~9 with ammonia water, add 6.0g of triethylamine and 20.0g of polyethylene glycol methacrylate (molecular weight: 300), heat the reaction solution to 70°C, and react for 3 hours. After the reaction, cool down to 0°C, add 8mL of concentrated hydrochloric acid and 25.8g of ammonium persulfate, and react at 0°C for 12 hours. After the reaction, pour the reaction solution into 1000mL of acetone for precipitation. Vacuum dried for 24 hours to obtain water-soluble polyaniline with a yield of 83%...

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Abstract

The present invention introduces a preparation method of water-soluble polyaniline: under a condition of -10 DEG C-20 DEG C, adding an acid and an oxidant into an aniline (or substituted aniline) and o-amino thiophenol aqueous solution, reacting for 1h-4h, and obtaining a polyaniline of a low molecular weight; adjusting pH of reaction liquid to alkaline by an alkali, adding triethylamine and polyethylene glycol methacrylate (PEGMEMA), reacting under a condition of 40 DEG C-80 DEG C for 1h-6h and obtaining PFG grafted polyaniline; adding an acid and an oxidant into reaction liquid again to continue the reaction for 1h-20h, further aggregating the polyaniline of a low molecular weight, precipitating by acetone, filtrating and drying, and obtaining a water-soluble polyaniline of a high molecular weight. The preparation method has mild reaction conditions, a simple synthesis route, an easily controlled process, easy separation and purification, a high atom utilization rate and fewer three wastes, being beneficial for industrial development.

Description

technical field [0001] The invention relates to a preparation method of water-soluble polyaniline, belonging to the technical field of conductive polymers. Background technique [0002] Polyaniline (PAn) has a wide range of applications in optoelectronics, light-emitting diodes, secondary batteries, sensors, electromagnetic shielding, and metal anti-corrosion due to the advantages of cheap raw materials, easy synthesis, good environmental stability, and special doping mechanism. The application prospect has been paid more and more attention by people. However, due to the strong rigidity of the polyaniline chain and the strong interaction between the chains, it is insoluble and infusible, and the processing is difficult, which limits its technical application and development. Therefore, improving the solubility of polyaniline has become a topic of great concern to researchers at home and abroad. [0003] At present, there are many synthetic methods for preparing water-solub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G73/02
Inventor 金玉存陈永平金汉强吴其建司马维维周亚芩
Owner CHINA PETROLEUM & CHEM CORP
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