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Tri-branched azobenzene/graphene composite energy storage material and preparation method thereof

A composite material, graphene technology, applied in the direction of sulfonic acid preparation, heat exchange materials, chemical instruments and methods, etc.

Active Publication Date: 2016-10-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The rapid development of my country's economy in the 21st century has increased the demand for energy. Conventional fossil energy can no longer meet the needs of my country's development, and the resulting environmental problems also need to be resolved urgently.

Method used

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  • Tri-branched azobenzene/graphene composite energy storage material and preparation method thereof
  • Tri-branched azobenzene/graphene composite energy storage material and preparation method thereof
  • Tri-branched azobenzene/graphene composite energy storage material and preparation method thereof

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preparation example Construction

[0027] 1) Preparation of three-branch azobenzene:

[0028] ① Preparation of product (1): Dissolve 1-3 parts of trimethylbenzenetricarboxylate and 1-3 parts of NaOH in 5-20 parts of methanol, slowly heat up to its reflux temperature, and then react for 12-16 hours. The solvent was removed by rotary evaporation, and the resulting solid was dissolved with 1-5 parts of dichloromethane, and then saturated NaHCO 3 20-40 parts of the solution to extract the product. The aqueous phase was taken out and washed 2-4 times with 20-50 parts of dichloromethane, and finally adjusted to pH=1-3 with 10-15% HCL, and a white precipitate was precipitated. Wash the precipitate with water until neutral, and dry it in a vacuum oven to obtain the target product.

[0029] ② Preparation of product (2): Dissolve 1-2 parts of product (1) in 3-5 parts of NMP, add 0.5-1 part of thionyl chloride under nitrogen protection, Stir at ℃ for 30-60min. Add 1-3 parts of Disperse Orange 3 to the system, and sti...

Embodiment 1

[0037] 1) Preparation of three-branch azobenzene:

[0038] ① Preparation of product (1): Dissolve 10mmol trimethylbenzenetricarboxylate and 20mmol NaOH in 70ml methanol, slowly raise the temperature to its reflux temperature, and then react for 12h. The solvent was removed by rotary evaporation, and the resulting solid was dissolved in 15ml of dichloromethane, then saturated NaHCO 3 solution to extract the product. The aqueous phase was taken out and washed twice with dichloromethane, and finally the pH was adjusted to pH=1 with 10% HCL to precipitate a white product. Wash the precipitate with water until neutral, and dry it in a vacuum oven to obtain the target product.

[0039]② Preparation of product (2): Dissolve 5 mmol of product (1) in 30 ml of NMP, add 0.8 ml of thionyl chloride under nitrogen protection, stir at 0°C for 30 min, and then at 20°C for 30 min. Add 1.5 g of Disperse Orange 3 to the system, and stir at 25°C for 5 h. Finally, pour it into water to precipi...

Embodiment 2

[0047] 1) Preparation of three-branch azobenzene:

[0048] ① Preparation of product (1): Dissolve 20mmol trimethylbenzenetricarboxylate and 20mmol NaOH in 70ml methanol, slowly raise the temperature to its reflux temperature, and then react for 12h. The solvent was removed by rotary evaporation, and the resulting solid was dissolved in 15ml of dichloromethane, then saturated NaHCO 3 solution to extract the product. The aqueous phase was taken out and washed twice with dichloromethane, and finally the pH was adjusted to pH=1 with 10% HCL to precipitate a white product. Wash the precipitate with water until neutral, and dry it in a vacuum oven to obtain the target product.

[0049] ② Preparation of product (2): Dissolve 5 mmol of product (1) in 30 ml of NMP, add 0.8 ml of thionyl chloride under nitrogen protection, stir at 0°C for 30 min, and then at 20°C for 30 min. Add 1.5 g of Disperse Orange 3 to the system, and stir at 25°C for 5 h. Finally, pour it into water to precip...

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Abstract

The invention relates to a tri-branched azobenzene / graphene composite energy storage material and a preparation method thereof. According to the invention, tri-branched azobenzene is grafted on single-layer graphene. The method comprises a nucleophilic substitution reaction and a diazonium salt method. First, disperse orange and p-aminoazophenyl-4-sulfonic acid react with trimethyl-1,3,5-benzenetricarboxylic acid, such that tri-branched azobenzene is synthesized; and the tri-branched azobenzene is compounded with pretreated reduced graphene oxide. Compared to azobenzene small molecules, the obtained tri-branched azobenzene / graphene composite material is greatly improved in energy value and half-life period, and facilitates solar energy heat storage. Through DSC detection, the energy density of the prepared tri-branched azobenzene / graphene composite material is 150-250Wh / kg. The material has an important application prospect in solar energy storage in the future.

Description

technical field [0001] The invention relates to a three-branch azobenzene / graphene composite energy storage material and a preparation method thereof, which has important application prospects in future solar energy storage and belongs to the field of composite functional materials. Background technique [0002] The rapid development of my country's economy in the 21st century has increased the demand for energy. Conventional fossil energy can no longer meet the needs of my country's development, and the resulting environmental problems also need to be resolved urgently. Under such circumstances, the development of new energy and renewable energy is very urgent, and it is also one of the hot topics that the developed countries in the world are competing to study. New energy and renewable energy are not only conducive to solving and supplementing the insufficient supply of fossil energy in our country, but also conducive to improving our energy structure, ensuring energy secu...

Claims

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Application Information

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IPC IPC(8): C09K5/14C07C309/46C07C303/22
CPCC07C303/22C09K5/14C07C309/46
Inventor 封伟杨伟翔冯奕钰
Owner TIANJIN UNIV
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