Thermal interface material and preparation method thereof

A thermal interface material, carbon nanotube thin film technology, applied in heat exchange materials, chemical instruments and methods, nanotechnology for materials and surface science, etc. Improve overall performance, high thermal conductivity, and good compressibility

Inactive Publication Date: 2020-08-25
安徽宇航派蒙健康科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the biggest problem with spinning carbon nanotube film materials is that the longitudinal thermal conductivity does not have a comparative advantage

Method used

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  • Thermal interface material and preparation method thereof
  • Thermal interface material and preparation method thereof
  • Thermal interface material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method of carbon nanotube-graphene-silicon carbide composite thermal interface material, such as Figure 4As shown, A-E is the process flow, that is, after the single-layer carbon nanotube film is compounded with a layer of nano-scale silicon oxide and graphene oxide coating, the process is repeated until the process of forming a multilayer composite carbon nanotube film. Specifically:

[0044] 1) The carbon nanotube film is prepared by the floating catalytic method, and rolled up, the winding length is 200m, and the average thickness of the carbon nanotube film on the roller is 2 microns;

[0045] 2) Prepare nano silicon dioxide and graphene oxide mixed dispersion solution, graphene mass concentration 25wt%, wherein the mass concentration of nano silicon dioxide is 5wt%; Adopt water as solvent, sodium dodecylbenzene sulfonate (SDBS) As a dispersant, the mass concentration of the dispersant is 2wt%, stirring and dispersing;

[0046] 3) Using the spraying...

Embodiment 2

[0051] A preparation method of carbon nanotube-graphene-silicon carbide composite thermal interface material, such as Figure 4 As shown, A-E is the process flow, that is, after the single-layer carbon nanotube film is compounded with a layer of nano-scale silicon oxide and graphene oxide coating, the process is repeated until the process of forming a multilayer composite carbon nanotube film. Specifically:

[0052] 1) The carbon nanotube film is prepared by the floating catalytic method, and rolled up, the winding length is 200m, and the average thickness of the carbon nanotube film on the roller is 2 microns;

[0053] 2) Prepare nano silicon dioxide and graphene oxide mixed dispersion solution, graphene mass concentration 30wt%, wherein the mass concentration of nano silicon dioxide is 5wt%; Adopt NMP as solvent, sodium dodecylbenzene sulfonate (SDBS) Dispersant, the concentration of dispersant is 2wt%, stirring and dispersing;

[0054] 3) Using the spraying method, evenly...

Embodiment 3

[0059] A preparation method of carbon nanotube-graphene-silicon carbide composite thermal interface material, such as Figure 4 As shown, A-E is the process flow, that is, after the single-layer carbon nanotube film is compounded with a layer of nano-scale silicon oxide and graphene oxide coating, the process is repeated until the process of forming a multilayer composite carbon nanotube film. Specifically:

[0060] 1) The carbon nanotube film is prepared by the floating catalytic method, and rolled up, the winding length is 200m, and the average thickness of the carbon nanotube film on the roller is 2 microns;

[0061] 2) Prepare nano silicon dioxide and graphene oxide mixed dispersion solution, graphene mass concentration 20wt%, wherein the mass concentration of nano silicon dioxide is 3wt%; Adopt water and NMP (mass concentration ratio is 10:1) as solvent, Sodium dodecyl sulfate (SDS) is used as a dispersant, and the concentration of the dispersant is 1wt%, stirring and di...

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Abstract

The invention provides a thermal interface material and a preparation method thereof. The preparation method comprises the following steps: preparing a carbon nanotube film by adopting a floating catalysis method; preparing a nanoscale silicon dioxide powder and graphene oxide mixed dispersion solution; uniformly distributing the mixed dispersion solution on the surface of a layer of carbon nanotube film by adopting a spraying method, then covering the carbon nanotube film with a layer of carbon nanotube film, and repeatedly spraying until a set number of layers is reached, so as to form a carbon nanotube-nano silicon dioxide-graphene oxide composite film; and carrying out rapid heat treatment on the composite film in an inert protective atmosphere, reducing graphene oxide into graphene, generating silicon carbide nanowires by utilizing a carbothermal reduction reaction, and forming a three-dimensional network structure between carbon nanotubes and graphene, so as to form the carbon nanotube-graphene-silicon carbide nanowire composite film. According to the thermal interface material and the preparation method thereof, the compressibility and the heat conductivity coefficient are improved.

Description

technical field [0001] The invention relates to the technical field of thermal interface materials, in particular to a thermal interface material which uses carbon nanotubes and silicon carbide nanowires to manufacture thermal interface materials and a preparation method thereof. Background technique [0002] In recent years, with the continuous improvement of the integration of electronic devices and smart terminals, heat dissipation has become one of the key factors restricting the performance of devices and terminals. Engineering concepts, and thermal interface materials are a hot spot in the development of thermal management materials in recent years, especially in the case of the rapid development of 5G technology, high-performance thermal interface materials with high thermal conductivity have important application value and potential. [0003] Traditional thermal interface materials mainly include thermal conductive silicone grease, thermal silica gel, heat dissipatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B33/00B32B37/06B32B37/10B32B37/24C09K5/14C09D1/00C01B32/162C01B32/184C01B32/97B82Y40/00B82Y30/00
CPCB32B9/007B32B9/04B32B33/00B32B37/06B32B37/10B32B37/24B32B2037/243B32B2255/20B32B2307/302B32B2457/00B82Y30/00B82Y40/00C01P2004/16C01P2004/80C01P2006/32C09D1/00C09K5/14C01B32/162C01B32/184C01B32/97
Inventor 谭化兵潘智军
Owner 安徽宇航派蒙健康科技股份有限公司
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