Preparation method for composite aerogel thermoelectric material

A technology of composite airgel and thermoelectric materials, which is applied in the field of preparation of composite airgel thermoelectric materials, can solve the problems of airgel electrical conductivity decrease and thermal conductivity increase, and achieve abundant raw materials, improved electrical conductivity, and production process Simple and convenient effect

Active Publication Date: 2019-02-01
BEIJING UNIV OF CHEM TECH
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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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  • Preparation method for composite aerogel thermoelectric material
  • Preparation method for composite aerogel thermoelectric material
  • Preparation method for composite aerogel thermoelectric material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (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.

[0024] (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.

[0025] (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

[0027] (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.

[0028] (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.

[0029] (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

[0031] (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 36 hours, 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.

[0032] (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.

[0033] (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 for a composite aerogel thermoelectric material. With the preparation method adopted, the technical problems of conductivity increase during the compounding of PEDOT, a carbon material and an inorganic material and the decrease of the overall conductivity of aerogel can be solved. The method includes following steps that: (1) bacterial cellulose and EDOT monomer are mixed in an aqueous solution at a mass ratio of 1: (9-11), and an obtained solution is fully stirred, and a 1.35 to 3.51 mmol of Fe<3+> aqueous solution is added into the solution, andthe solution is fully stirred for 24 to 48 hours, and is washed with HCL and deionized water, so that a composite material mixed liquid can be prepared; (2) the prepared solution is mixed with nano-conductive fillers with different proportions of content, stirring and ultrasonic treatment are carried out, so that an obtained solution is frozen at -10 to -50 DEG C, and the solution is subjected tovacuum freezing and drying, so that the aerogel can be obtained; and (3) the aerogel obtained in the step (2) is treated with a powder tableting machine, so that a BC-PEDOT multi-component composite sheet having a pore structure is obtained. The method of 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 Applications(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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