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Production method of graphite/carbon nanotube fiber bundle/graphene heat conduction composite film

A technology of carbon nanotube fiber and heat conduction composite, which is applied in the direction of nanotechnology, nanotechnology, heat exchange materials, etc., can solve the problems of low thermal conductivity and low thermal conductivity anisotropy of heat conduction sheets, and achieve low thermal conductivity anisotropy Energy and growth are simple and controllable

Active Publication Date: 2017-03-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the deficiency that the heat conduction sheet prepared by the existing graphite paper or graphene film is too low along the thickness direction, and provides a kind of heat conduction graphite with high heat conduction performance along the plane and the thickness direction, that is, low heat conduction anisotropy Tablets and their preparation method

Method used

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  • Production method of graphite/carbon nanotube fiber bundle/graphene heat conduction composite film
  • Production method of graphite/carbon nanotube fiber bundle/graphene heat conduction composite film
  • Production method of graphite/carbon nanotube fiber bundle/graphene heat conduction composite film

Examples

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Embodiment 1

[0031] Place commercially available graphite paper with a thickness of 0.1 mm into a magnetic boat, and ablate and oxidize it at a temperature of 400 °C for 0.5 hours in a tube furnace with an air atmosphere; immerse the ablated and oxidized graphite paper in pure silicic acid. Immerse in ethyl ester solvent for 0.5 hours, then take out the impregnated graphite paper and place it in the air for 5 hours. The air reacts with the ethyl orthosilicate on the surface of the graphite paper to convert it into orthosilicic acid, and then the aging is completed. The graphite paper was placed in a blast drying oven and dried at 60°C for 18 hours to obtain a graphite paper with a silica coating on the surface; ferrocene was dissolved in a xylene solution to prepare a catalyst precursor solution with a concentration of 0.02g / ml, The graphite paper with silicon oxide coating on the surface is placed in the constant temperature zone of the vacuum tube furnace, and argon gas is introduced as a...

Embodiment 2

[0033] Place commercially available graphite paper with a thickness of 0.5 mm in a magnetic boat, and ablate and oxidize it at a temperature of 500 °C for 2 hours in a tube furnace with an air atmosphere; immerse the ablated and oxidized graphite paper in pure silicic acid. Immerse in ethyl ester solvent for 1.5 hours, then take out the impregnated graphite paper and place it in the air for 10 hours. The air reacts with the ethyl orthosilicate on the surface of the graphite paper to convert it into orthosilicic acid, and then the aging is completed. The graphite paper was placed in a blast drying oven and dried at 80°C for 24 hours to obtain a graphite paper with a silica coating on the surface; ferrocene was dissolved in a xylene solution to prepare a catalyst precursor solution with a concentration of 0.05g / ml, The graphite paper with silicon oxide coating on the surface is placed in the constant temperature zone of the vacuum tube furnace. After being evacuated to a vacuum, ...

Embodiment 3

[0035] Place commercially available graphite paper with a thickness of 0.3 mm in a magnetic boat, and ablate and oxidize it at a temperature of 450 °C for 1 hour in a tube furnace with an air atmosphere; immerse the ablated and oxidized graphite paper in pure silicic acid. Immerse in ethyl ester solvent for 1 hour, then take out the impregnated graphite paper and place it in the air for 8 hours. The air reacts with the ethyl orthosilicate on the surface of the graphite paper to convert it into orthosilicic acid, and then the aging is completed. The graphite paper was placed in a blast drying oven and dried at 70°C for 20 hours to obtain a graphite paper with a silica coating on the surface; ferrocene was dissolved in a xylene solution to prepare a catalyst precursor solution with a concentration of 0.03g / ml, The graphite paper with silicon oxide coating on the surface is placed in the constant temperature zone of the vacuum tube furnace. After being evacuated to a vacuum, argon...

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Abstract

The invention relates to a production method of a graphite / carbon nanotube fiber bundle / graphene heat conduction composite film. The method comprises the following steps: carrying out ablation oxidation on graphite paper at a 400-500 DEG C; dipping the graphite paper in an ethyl orthosilicate solvent, ageing the dipped graphite paper, and drying the aged graphite paper to obtain graphite paper with the surface containing a silicon oxide coating; dissolving ferrocene in a xylene solution to prepare a catalyst precursor solution, pushing the catalyst precursor solution into a vacuum tubular furnace, and growing carbon nanotube fiber bundles to obtain a graphene paper sample with the carbon nanotube fiber bundles; and adding graphene oxide powder into deionized water, carrying out ultrasonic dispersion, placing the obtained graphene paper sample and the obtained aqueous solution of graphene oxide in a hydrothermal reaction kettle, and carrying out a reaction to obtain the graphite / carbon nanotube fiber bundle / graphene heat conduction composite film. The graphite / carbon nanotube fiber bundle / graphene heat conduction composite film has high heat conduction performance along the plane and thickness direction, the heat conductivity of the graphite / carbon nanotube fiber bundle / graphene heat conduction composite film along the plane direction reaches 400 W / (m.K) or above, and the heat conductivity of the graphite / carbon nanotube fiber bundle / graphene heat conduction composite film along the thickness direction reaches 15 W / (m.K) or above.

Description

technical field [0001] The invention relates to a preparation method of a graphite / carbon nanotube fiber bundle / graphene thermally conductive composite film, in particular to a preparation method of growing a carbon nanotube fiber bundle on graphite paper and self-assembling a composite graphene thin layer by a hydrothermal method method. Background technique [0002] With the rapid development of science and technology since the 21st century, efficient heat conduction and heat dissipation has become a key issue in the field of thermal management materials. For example, in the process of the structure of the heat-generating device, a large amount of heat is accumulated due to the resistance, thermal resistance, electronic eddy current and other effects of the device itself or the influence of the external environment. The density can be particularly high, resulting in an extremely unbalanced temperature distribution across the device. The surface temperature of most microe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14C04B41/89C04B41/52B82Y30/00
Inventor 封伟纪滕霄冯奕钰
Owner TIANJIN UNIV
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