Doped-state polyaniline epoxy paint and preparation method thereof

A technology of polyaniline epoxy and polyaniline, which is applied in epoxy resin coatings, anti-corrosion coatings, conductive coatings, etc., can solve the problems of decreased anti-corrosion performance of epoxy coatings, lower barrier properties of coatings, difficulty in uniform dispersion, etc. Achieve the effect of low cost, high corrosion resistance and simple process equipment

Inactive Publication Date: 2014-08-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solubility of HCl-doped polyaniline in N-methylpyrrolidone is poor, and it is difficult to disperse evenly in epoxy coatings, which reduces the barrier properties of coatings and reduces the corrosion resistance of epoxy coatings.

Method used

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  • Doped-state polyaniline epoxy paint and preparation method thereof
  • Doped-state polyaniline epoxy paint and preparation method thereof
  • Doped-state polyaniline epoxy paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] Step 1: Preparation of doped polyaniline

[0040] press m 苯胺 :m 过硫酸铵 The ratio of =9.3g:22.8g takes by weighing aniline and ammonium persulfate. Dissolve the weighed aniline in 100ml of 1mol / L phosphoric acid, ultrasonically mix it for 1h, then pour it into a three-neck flask for electric stirring, and place it in an ice-water bath for pre-cooling. Dissolve the weighed ammonium persulfate in 100 ml of 1 mol / L phosphoric acid, and perform pre-cooling treatment in an ice-water bath as well. Place the pre-cooled ammonium persulfate-phosphoric acid solution in a constant pressure funnel and add it dropwise to the pre-cooled phosphoric acid-aniline solution within 3 hours, with constant stirring, and the reaction temperature is 0-5°C. After the dropwise addition, continue to stir for 6h to ensure that the polymerization is complete. Filter the prepared dark green polymer, and wash the filtrate with ethanol and deionized water until neutral; then place it in a vacuum dryi...

Embodiment approach 2

[0048] Step 1: Preparation of doped polyaniline

[0049] press m 苯胺 :m 过硫酸铵 The ratio of =8g:32g takes by weighing aniline and ammonium persulfate. Dissolve the weighed aniline in 100ml of 1mol / L phosphoric acid, ultrasonically mix it for 1h, then pour it into a three-neck flask for electric stirring, and place it in an ice-water bath for pre-cooling. Dissolve the weighed ammonium persulfate in 100 ml of 1 mol / L phosphoric acid, and perform pre-cooling treatment in an ice-water bath as well. Place the pre-cooled ammonium persulfate-phosphoric acid solution in a constant pressure funnel and add it dropwise to the pre-cooled phosphoric acid-aniline solution within 3 hours, with constant stirring, and the reaction temperature is 0-5°C. After the dropwise addition, continue to stir for 6h to ensure that the polymerization is complete. Filter the prepared dark green polymer, and wash the filtrate with ethanol and deionized water until neutral; then place it in a vacuum drying o...

Embodiment approach 3

[0057] Step 1: Preparation of doped polyaniline

[0058] press m 苯胺 :m 过硫酸铵 The ratio of =10g:22g takes by weighing aniline and ammonium persulfate. Dissolve the weighed aniline in 100ml of 1mol / L phosphoric acid, ultrasonically mix it for 1h, then pour it into a three-neck flask for electric stirring, and place it in an ice-water bath for pre-cooling. Dissolve the weighed ammonium persulfate in 100 ml of 1 mol / L phosphoric acid, and perform pre-cooling treatment in an ice-water bath as well. Place the pre-cooled ammonium persulfate-phosphoric acid solution in a constant pressure funnel and add it dropwise to the pre-cooled phosphoric acid-aniline solution within 1 hour, with constant stirring, and the reaction temperature is 0-5°C. After the dropwise addition, continue to stir for 4h to ensure that the polymerization is complete. Filter the prepared dark green polymer, and wash the filtrate with ethanol and deionized water until neutral; then place it in a vacuum drying o...

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Abstract

The invention discloses doped-state polyaniline epoxy paint and a preparation method thereof. The preparation method includes following steps: preparing doped-state polyaniline in a manner of chemical polymerization with ammonium persulfate being an oxidizing agent and phosphoric acid being a doping agent, preparing intrinsic-state polyaniline through a dedoping process, carrying out a secondary doping reaction between the intrinsic-state polyaniline and dodecylbenzene sulfonic acid to prepare secondarily-doped-state polyaniline, mixing the secondarily-doped-state polyaniline with epoxy resin to prepare the polyaniline epoxy paint having a good anti-corrosion performance. In the technical scheme of the invention, a coating prepared from the secondarily-doped-state polyaniline not only has a high electrical conductivity but also has a high anti-corrosion performance. The preparation method is simple in required processing equipment, is relatively low in cost and is easy to achieve industrialization.

Description

technical field [0001] The invention relates to a conductive anticorrosion coating for metal components and a preparation method thereof, more specifically, to a secondary doped polyaniline epoxy coating and a preparation method thereof. Background technique [0002] The impact of corrosion is extremely serious. It will not only reduce the service life of structures, increase maintenance and repair costs, but may also cause shutdowns, major accidents, and affect personal safety. Therefore, the development of corrosion protection technology is of great significance for reducing economic losses. . In recent years, conductive polymers and their composites have been widely used in many fields such as microelectronics, display technology, electrocatalysis, sensors, supercapacitors, and corrosion protection, which have aroused great interest. Therefore, the research, preparation and application of conductive polymers have attracted more and more attention. Among the high molecul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/24C09D5/08
Inventor 刘玉环王慧慧王吉会
Owner TIANJIN UNIV
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