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Carbon nanotube/graphene composite film and preparation method thereof

A graphene composite and carbon nanotube technology, which is applied in the direction of carbon nanotubes, graphene, nanocarbon, etc., can solve the problems of not exerting the high thermal conductivity of carbon nanotubes, and not playing the role of connecting graphene sheets, so as to achieve Improve thermal conductivity and mechanical properties, avoid decomposition loss, and complete crystal structure

Active Publication Date: 2018-02-02
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent document "A Preparation Method of Carbon Nanotube / Graphene Composite Material" (applied by Southwest Petroleum University) with the application number 201410157857.4 discloses a simple physical mixture of carbon nanotubes and graphene oxide, and then reduces the graphene oxide , and then become a mixed material of carbon nanotubes and graphene. In such a composite material, carbon nanotubes are randomly dispersed on the graphene sheets, and it does not play the role of connecting graphene sheets, and does not play the role of carbon nanotubes in the axial direction. High thermal conductivity

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  • Carbon nanotube/graphene composite film and preparation method thereof
  • Carbon nanotube/graphene composite film and preparation method thereof
  • Carbon nanotube/graphene composite film and preparation method thereof

Examples

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Embodiment 1

[0036] A carbon nanotube / graphene composite film of the present invention, such as figure 1 As shown, the carbon nanotube / graphene composite film is formed by stacking graphene sheets 1, and carbon nanotubes 2 grow between the graphene sheets 1, and the carbon nanotubes 2 in the vertical direction are connected up and down. Graphene sheets 1, the carbon nanotubes 2 with the axial direction in the horizontal direction connect the left and right adjacent graphene sheets 1.

[0037] In this embodiment, the carbon nanotubes 2 are multi-walled carbon nanotubes.

[0038] In this embodiment, the thickness of the carbon nanotube / graphene composite film is 5 μm.

[0039]In this embodiment, the in-plane thermal conductivity of the carbon nanotube / graphene composite film is 900 W / mK, and the thermal conductivity in the thickness direction is 5.9 W / mK.

[0040] A kind of preparation method of the carbon nanotube / graphene composite film of above-mentioned present embodiment, comprises th...

Embodiment 2

[0048] The carbon nanotube / graphene composite film of this embodiment is basically the same as that of Example 1, the only difference is that the in-plane thermal conductivity of the carbon nanotube / graphene composite film of this embodiment is 910W / mK, and the thermal conductivity in the thickness direction is 910W / mK. The conductivity is 3.8W / mK. The thickness of the composite film in this example is 5 μm.

[0049] The preparation method of the carbon nanotube / graphene composite film of this example is basically the same as that of Example 1, the only difference being that the mass of PMMA and nickel acetate in step (2) are both 10 mg.

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Abstract

The invention discloses a carbon nanotube / graphene composite film and a preparation method thereof. The carbon nanotube / graphene composite film is formed by stacking graphene sheets, and carbon nanotubes are grown between the graphene sheets to connect the upper and lower layers or the left and right adjacent graphene sheets. The preparation method comprises preparing solution A containing graphene substances; preparing solution B containing polymer carbon source and transition metal catalyst precursor; mixing solution A and solution B to obtain a mixed solution; filtering and drying the mixed solution to obtain Doping the graphene-like material film; heating the doped graphene-like material film in reducing gas and inert gas to obtain a carbon nanotube / graphene composite film. Both the in-plane direction and the thickness direction of the carbon nanotube / graphene composite film of the present invention have high thermal conductivity, and can be applied in a heat dissipation system to solve the heat dissipation problem in the field of high heat flux density.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a carbon nanotube / graphene composite film and a preparation method thereof. Background technique [0002] With the development of industrial technology, the fields of microelectronics, LED and high-energy weapons have put forward higher requirements on the thermal conductivity of materials, mainly thermal diffusion materials with high thermal conductivity. Specifically, the components on the electronic circuit board are increasingly dense, which increases the heat flux density of the electronic chip, making it difficult to conduct heat quickly, and the temperature of the chip rises, leading to product failure. Therefore, heat management of electronic products has become an important issue in product design. In addition, the emerging LED industry is also facing the problem of chip heat dissipation. The rise of chip temperature will greatly reduce the life ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01B32/16
Inventor 张鉴炜石刚蒋彩鞠苏江大志
Owner NAT UNIV OF DEFENSE TECH