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A kind of preparation method of composite aerogel thermoelectric material

A technology of composite aerogel and thermoelectric materials, which is applied in the field of preparation of composite aerogel thermoelectric materials, can solve the problems of increased thermal conductivity and decreased electrical conductivity of aerogels, and achieves improved electrical conductivity, abundant raw materials, and good quality. soft effect

Active Publication Date: 2020-04-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the thermal conductivity rises caused by the compounding of PEDOT with carbon materials and inorganic materials, and the overall electrical conductivity decreases when the aerogel is made, and provides a simple and effective multi-component PEDOT, bacterial cellulose, and conductive filler. Preparation and processing method of composite airgel material

Method used

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  • A kind of preparation method of composite aerogel thermoelectric material
  • A kind of preparation method of composite aerogel thermoelectric material
  • A kind of preparation method of composite aerogel thermoelectric material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Preparation of composite material mixture: Dilute 10ml (2mg / ml) of bacterial cellulose with 20ml of deionized water, then mix it with 1.27mmol of EDOT monomer in the aqueous solution, add 1.35mmol of nonaqueous water and nitric acid after fully stirring The aqueous solution made of iron and 3ml of deionized water was fully stirred for 24 hours, washed with HCL (0.1mol / L) and deionized water for at least 3 times, and finally made into a composite material mixture with a concentration of 2mg / ml.

[0023] (2) Preparation of airgel: the obtained solution was frozen at -50° C. for 4 hours, and then vacuum freeze-dried for 48 hours to obtain an airgel.

[0024] (3) Treatment of airgel: use a powder tablet press at 5 MPa and 50°C for 15 minutes to obtain a BC-PEDOT multi-component composite sheet with a porous structure.

Embodiment 2

[0026] (1) Preparation of composite material mixture: Dilute 10ml (2mg / ml) of bacterial cellulose with 20ml of deionized water, then mix it with 1.27mmol of EDOT monomer in the aqueous solution, add 1.35mmol of nonaqueous water and nitric acid after fully stirring The aqueous solution made of iron and 3ml of deionized water was fully stirred for 24 hours, washed with HCL (0.1mol / L) and deionized water for at least 3 times, and finally made into a composite material mixture with a concentration of 2mg / ml.

[0027] (2) Preparation of airgel: mix (1) solution with different proportions of DWCNT, stir, and sonicate. The obtained solution was frozen at -10°C for 4 hours, and then vacuum freeze-dried for 48 hours to obtain an airgel.

[0028] (3) Treatment of airgel: use a powder tablet press at 50 MPa and 0°C for 0.1 min to obtain a BC-PEDOT multi-component composite sheet with a porous structure.

Embodiment 3

[0030] (1) Preparation of composite material mixture: Dilute 10ml (2mg / ml) of bacterial cellulose with 20ml of deionized water, then mix it with 1.41mmol of EDOT monomer in the aqueous solution, add 2.43mmol of nonaqueous water and nitric acid after fully stirring The aqueous solution made of iron and 3ml of deionized water was fully stirred for 36h, and HCL (0.1mol / L) and deionized water were used for 3 times respectively, and finally a composite material mixture solution with a concentration of 2mg / ml was prepared.

[0031] (2) Preparation of airgel: Mix the solution of (1) with different proportions of MWNT, stir and sonicate. The obtained solution was frozen at -30°C for 4 hours, and then vacuum freeze-dried for 48 hours to obtain an airgel.

[0032] (3) Treatment of airgel: use a powder tablet press at 25 MPa and 50° C. for 10 minutes to obtain a BC-PEDOT multi-component composite sheet with a porous structure.

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Abstract

The invention relates to a preparation method of a composite airgel thermoelectric material, which solves the technical problem that the thermal conductivity caused by the combination of PEDOT and carbon materials and inorganic materials is increased, and the overall electrical conductivity of the airgel is reduced, including The steps are as follows: (1) Mix bacterial cellulose and EDOT monomer in the aqueous solution at a mass ratio of 1: (9-11), stir well and add 1.35-3.51 mmol Fe 3+ Aqueous solution, fully stirred for 24 to 48 hours, washed with HCL and deionized water, and made into a composite material mixture; (2) Mix the prepared solution with nano-conductive fillers in different proportions, stir, and sonicate, and the obtained solution is in- freezing at 10-50°C, and then vacuum freeze-drying to obtain airgel; (3) processing the airgel prepared in step (2) with a powder tablet press to obtain a BC-PEDOT multi-component composite sheet with a porous structure. The invention is widely used in the field of thermoelectric material preparation.

Description

technical field [0001] The invention relates to the field of thermoelectric materials, in particular to a method for preparing a composite airgel thermoelectric material. Background technique [0002] At present, traditional non-renewable energy sources such as oil and coal are not enough to support the long-term development of human society. In addition, with the advocacy of environmental protection, the voice of sustainable development is getting higher and higher, and the development of new environmentally friendly energy materials and devices has become a scientific research. Hotspots on . Thermoelectric material is a material that can realize mutual conversion of heat energy and electric energy. The thermoelectric device has the advantages of small size, no noise in operation, long service life, and no environmental pollution. It can use carriers only by temperature difference. Motion generates electricity. However, the current conversion efficiency is low, and it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34C08L65/00C08L1/04C08K7/24C08K7/06C08J9/28
CPCC08J9/0061C08J9/0071C08J9/0076C08J9/286C08K3/041C08J2401/04C08K2201/011C08K7/06C08J2365/00H10N10/01
Inventor 兰金叻贾芳杨小平吴瑞丽原浩成
Owner BEIJING UNIV OF CHEM TECH
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