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Method for preparing conductive polyaniline/graphene large-area flexible electrochromic material

A conductive polyaniline and graphene technology, which is applied in the electrolysis process, electrolysis components, electrolysis organic production, etc., to achieve the effects of good adhesion, stable performance and high efficiency

Inactive Publication Date: 2015-05-20
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic Zhang Wenzhi and others proposed the idea that electrochromic polymers are combined with electrodes in a covalently bonded manner; Niu Haijun and others from Heilongjiang University proposed the construction of poly-Schiff base and grafted graphene electrochromic devices. Thoughts; Xiong Shanxin from Xi'an University of Science and Technology used interfacial covalent bonds to construct polyaniline and nano-carbon materials to prepare electrochromic materials. A report on the improvement of the interfacial adhesion between the color-changing material and the electrode material and the film-forming property through strong hydrogen bonding

Method used

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  • Method for preparing conductive polyaniline/graphene large-area flexible electrochromic material
  • Method for preparing conductive polyaniline/graphene large-area flexible electrochromic material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The preparation method of conductive polyaniline / graphene large-area flexible electrochromic material comprises the following steps:

[0023] 1) Under the protection of an inert gas, disperse graphene containing 2g of carboxyl groups in 800g of dimethylformamide and ultrasonically disperse in a water bath for 1h, then add 4g of toluene diisocyanate and heat at 50°C for 24h to generate a coupling reaction to introduce isocyanide Acid groups, unreacted toluene diisocyanate were removed by washing and vacuum filtration.

[0024]2) 2 g of graphene modified by the obtained isocyanate group was dispersed in 800 g of dimethylformamide solution, and 4 g of 4-amino-6-hydroxyl-2-methylpyrimidine and 2 g of triethyl acetic acid were added salt to obtain 2-ureido-4[1H]-pyrimidinone group, the mixture was ultrasonically stirred at 100°C for 20 h, washed and dried, then dissolved in an organic solvent to obtain a dispersion solution of graphene bonded by four hydrogen bonds.

[0025...

Embodiment 2

[0027] The preparation method of conductive polyaniline / graphene large-area flexible electrochromic material comprises the following steps:

[0028] 1) Under the protection of an inert gas, disperse graphene containing 10g of carboxyl groups in 5000g of dimethylformamide and ultrasonically disperse in a water bath for 1h, then add 50g of toluene diisocyanate and heat at 50°C for 24h to generate a coupling reaction to introduce isocyanide Acid groups, unreacted toluene diisocyanate were removed by washing and vacuum filtration.

[0029] 2) 10g of graphene modified by the obtained isocyanate group was dispersed in 5000g of dimethylformamide solution, and 30g of 4-amino-6-hydroxyl-2-methylpyrimidine and 20g of triethyl acetic acid were added salt to obtain 2-ureido-4[1H]-pyrimidinone group, the mixture was ultrasonically stirred at 100°C for 20 h, washed and dried, then dissolved in an organic solvent to obtain a dispersion solution of graphene bonded by four hydrogen bonds.

[...

Embodiment 3

[0032] The preparation method of conductive polyaniline / graphene large-area flexible electrochromic material comprises the following steps:

[0033] 1) Under the protection of an inert gas, disperse graphene containing 50g of carboxyl groups in 15,000g of dimethylformamide in a water bath and ultrasonically disperse for 1h, then add 100g of toluene diisocyanate and heat at 50°C for 24h to generate a coupling reaction to introduce isocyanide Acid groups, unreacted toluene diisocyanate were removed by washing and vacuum filtration.

[0034] 2) 50g of graphene modified by the obtained isocyanate group was dispersed in 15000g of dimethylformamide solution, and 150g of 4-amino-6-hydroxyl-2-methylpyrimidine and 100g of triethyl acetic acid were added salt to obtain 2-ureido-4[1H]-pyrimidinone group, the mixture was ultrasonically stirred at 100°C for 20 h, washed and dried, then dissolved in an organic solvent to obtain a dispersion solution of graphene bonded by four hydrogen bonds...

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Abstract

The invention discloses a method for preparing a conductive polyaniline / graphene large-area flexible electrochromic material. The method comprises the following steps: at first, preparing a graphene solution with high dispersity via the function of a tetrahydro bond; then bonding with an ITO electrode via the function of the hydrogen bond; finally preparing a conductive polyaniline / graphene composite electrochromic material by using an electrochemical method. The bonding function of the hydrogen bond is adopted by the method to greatly improve the dispersity and the electrochromic performance of the graphene in the conductive polyaniline, and meanwhile improve the adhesion property with the ITO electrode to prepare the large-area flexible electrochromic material possibly.

Description

technical field [0001] The invention belongs to a preparation method of a polymer composite electrochromic material, in particular to a preparation method of a conductive polyaniline / graphene large-area flexible electrochromic material. Background technique [0002] Electrochromism refers to that under the action of an external electric field, the redox of the material causes reversible changes in the optical properties of the material, including transmittance, reflectivity, absorptivity, etc., and shows a stable reversible color change in the range of visible light. Taking advantage of this characteristic, electrochromic materials can be widely used in smart windows, memories, displays, sensors, stealth materials and other fields, and have broad application prospects as a new type of functional material with high efficiency, low energy and environmental protection. At present, the materials used in commercialized electrochromic devices are mainly transition metal oxides suc...

Claims

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Application Information

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IPC IPC(8): C25B3/00C01B31/04
Inventor 吴新明张文治徐克平
Owner XIAN TECHNOLOGICAL UNIV
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