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Self-doped electric active polyamic acid, preparation method and application thereof in electrochromic aspect

A technology of polyamic acid and self-doping, which is applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., and can solve problems such as non-conduction

Active Publication Date: 2013-08-21
上海鼎弈材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people mostly use the doping method of protonic acid for the doping of polyaniline and its derivatives. However, the polyaniline derivatives prepared by this method basically cannot conduct electricity when pH>3.0.

Method used

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  • Self-doped electric active polyamic acid, preparation method and application thereof in electrochromic aspect
  • Self-doped electric active polyamic acid, preparation method and application thereof in electrochromic aspect
  • Self-doped electric active polyamic acid, preparation method and application thereof in electrochromic aspect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 6.54g (0.06mol) of 4-aminophenol and 4.14g (0.03mol) of anhydrous potassium carbonate into a 250mL three-necked flask, add 80mL of DMAc solvent, stir electromagnetically, and add 10mL of toluene after dissolution. Under the protection of nitrogen, the system was heated to 140° C., and the solution was kept under reflux for 2 hours. At this time, the 4-aminophenol was completely converted into the form of phenoxide under the effect of anhydrous potassium carbonate. At this time, after the system was slightly cooled, 15.18 g (0.03 mol) of difluoromonomer (DFAT) was added. Heat the above compound for another two hours and carry water with toluene to ensure that there is no turbidity in the water container (the water has been removed at this time). Then increase reaction temperature, after toluene is steamed, be heated to 160 ℃ of reaction six hours, guarantee that system reaction is complete. Heating was stopped, and after the system was cooled to room temperature, th...

Embodiment 2

[0042] We synthesized four kinds of copolymers C with the molar ratios of diamine monomer M and diamine monomer N3 being 80:20, 60:40, 40:60, and 20:80, respectively. 1 (PAE-p-OA-X, X represents the percentage of the ratio of diamine monomer N3 to tetraacid dianhydride monomer). Add diamine monomer M and diamine monomer N3 (total 0.01mol) into a three-necked bottle filled with 30mL N,N-dimethylacetamide solution, and add 3,3',4,4 3.10 g (0.01 mol) of '-diphenyl ether tetracarboxylic dianhydride. The percentage of the solid content of the reaction system mass is 25%, the reaction system is stirred under magnetic force, nitrogen protection, and reacts at room temperature for 5 hours, and the polyamic acid solution obtained by the reaction C 1 (PAE-p-OA-X). The viscosity of the polymer (0.84<η<1.29) (where 15<m<25, 25<n<40).

[0043] Polymer C 1 Diluted to a 10% DMAc solution, and spin-coated on ITO glass to form a film to prepare a C / ITO electrode. Then the transmittance of...

Embodiment 3

[0045] The method is as in Example 2, changing 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride to 3,3',4,4'-benzophenone tetracarboxylic dianhydride, using NMP as the organic solvent, Others remain unchanged (the molar ratio of the diamine monomer M to the diamine monomer N3 is 80:20, 60:40, 40:60, 20:80), separated and purified to obtain polymer C 2 . The viscosity of the obtained polymer is in the range of 0.69 to 0.98 (where 15<m<45, 25<n<60). Compared with Example 2, the electrochromic properties of the polymers are basically similar.

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Abstract

The invention relates to a self-doped electric active polyamic acid, a preparation method and an application thereof in an electrochromic aspect, belonging to the field of functional polymer materials. According to the preparation method disclosed by the invention, the polyamic acid containing an aniline chain segment on a side chain with a sulfuric acid group is firstly synthesized through a ternary copolymerization way; and then, the polymer solution is spin-coated on ITO (indium tin oxide) glass for being used as a working electrode. The electrochromic nature of a polymer in electrolyte solutions with different pH values is respectively determined. Compared with traditional polyaniline derivatives, the side-stranded self-doped electric active polyamic acid containing the sulfuric acid group can keep good electrochromic properties in acidic, neutral and weakly alkaline solutions. The self-doping effect of the sulfuric acid group and a carboxylic acid group in the polymer can enable the polymer to still keep the electric activity under a high pH value so as to show the electrochromic properties. The range of application of electrochromic devices of the polymer is greatly expanded.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and specifically relates to a series of side chain type self-doping electroactive polyamic acids containing sulfonic acid groups, their synthesis method and their electrochromic properties under acidic, neutral and weak alkaline conditions aspects of application. technical background [0002] The electrochromic effect is the property of materials to exhibit multiple color changes under the action of an external electric field. As a display device, electrochromic devices have unique advantages such as low driving voltage, high contrast, wide viewing angle, and adjustable colors. They are widely used in construction, transportation and other fields as smart windows and non-glare rearview mirrors. Electrochromic materials can generally be divided into two categories: inorganic materials and conductive polymers. Inorganic materials are electrochromic materials that have been studied earl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C09K9/02
Inventor 晁单明王树涛迟茂强贾晓腾刘新才王策
Owner 上海鼎弈材料科技有限公司
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