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Graphene-copper composite heat dissipation film and its preparation method and application

A technology of composite heat dissipation film and graphene film, applied in the direction of graphene, applications, other household appliances, etc., can solve the problems of poor thermal conductivity and flexibility of macroscopic materials, and many defects, and is conducive to machine repair, prolong life, The effect of high yield

Active Publication Date: 2021-10-15
宁波顶峰机器人有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the existing exfoliated graphene sheets are small and have many defects, and the thermal conductivity and flexibility of the assembled macroscopic materials are not good.

Method used

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  • Graphene-copper composite heat dissipation film and its preparation method and application
  • Graphene-copper composite heat dissipation film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 proposes a kind of graphene-copper composite cooling film, and its preparation method comprises the steps:

[0016] S101: first pretreating natural graphite, and then sequentially undergoing high-speed shearing, ultrasonic stripping and emulsification to obtain graphene.

[0017] S102: The graphene obtained in the step S101 is mixed, then prepared into a film and dried to obtain a graphene film, and then the graphene film is heated at a temperature of 2900° C. The micro-airbags were rolled to produce micro-folds.

[0018] S103: Compacting the graphene film treated in step S102 with the copper foil, and then pasting the thermally conductive black film on the other side of the copper foil to obtain a graphene-copper composite heat dissipation film with a thickness of 25 μm.

Embodiment 2

[0020] Embodiment 2 proposes a kind of graphene-copper composite cooling film, and its preparation method comprises the steps:

[0021] S101: first pretreating natural graphite, and then sequentially undergoing high-speed shearing, ultrasonic stripping and emulsification to obtain graphene.

[0022] S102: Mix the graphene obtained in the step S101, then prepare a film and dry it to obtain a graphene film, then heat the graphene film at a temperature of 3100° C. The micro-airbags were rolled to produce micro-folds.

[0023] S103: compacting the graphene film treated in step S102 with the copper foil, and then pasting the thermally conductive black film on the other side of the copper foil to obtain a graphene-copper composite heat dissipation film with a thickness of 150 μm.

Embodiment 3

[0025] Embodiment 3 proposes a kind of graphene-copper composite cooling film, and its preparation method comprises the steps:

[0026] S101: first pretreating natural graphite, and then sequentially undergoing high-speed shearing, ultrasonic stripping and emulsification to obtain graphene.

[0027] S102: Mix the graphene obtained in the step S101, then prepare a film and dry it to obtain a graphene film, then heat the graphene film at a temperature of 3000° C. The micro-airbags were rolled to produce micro-folds.

[0028] S103: Compacting the graphene film treated in step S102 with the copper foil, and then pasting the thermally conductive black film on the other side of the copper foil to obtain a graphene-copper composite heat dissipation film with a thickness of 80 μm.

[0029] Table 1: Parameters of thermally conductive black film

[0030]

[0031] In the new material laboratory of the Yangpu District Entrepreneurship Base in Shanghai, the OPPO prototype was tested w...

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Abstract

The invention relates to a graphene-copper composite heat dissipation film and its preparation method and application. The preparation method comprises the following steps: firstly pretreating natural graphite, and then successively undergoing high-speed shearing, ultrasonic stripping and emulsification to obtain graphene; The graphene is mixed, then prepared into a film and dried to obtain a graphene film, and then the graphene film is heated at a preset temperature to prepare a micro-airbag, and then the micro-airbag is mechanically rolled at a preset pressure to Prepare micro-folds; compact the graphene film and copper foil, and then paste the thermally conductive black film on the other side of the copper foil to obtain a graphene-copper composite heat dissipation film. The preparation method of the graphene-copper composite heat dissipation film of the present invention accelerates the dissipation of heat by balancing the point-like heat source to the surface, and then radiates it longitudinally, so as to achieve the protection effect of product components, and its heat dissipation effect is better than that of traditional Craft graphite flakes and artificial graphite flakes.

Description

technical field [0001] The invention belongs to the field of material processing and preparation, and in particular relates to a graphene-copper composite heat dissipation film and its preparation method and application. Background technique [0002] Graphene is a two-dimensional material with a hexagonal honeycomb lattice composed of carbon atoms in sp2 hybridized orbitals and a thickness of only one carbon atom. Graphene is currently the thinnest but also the hardest nanomaterial in the world. It is almost completely transparent and only absorbs 2.3% of light; its thermal conductivity is as high as 5300W / m K, higher than that of carbon nanotubes and diamonds, and its electron mobility at room temperature exceeds 15000cm 2 / V·s is higher than carbon nanotubes or silicon crystals, and the resistivity is only about 10Ω·m~8Ω·m, which is lower than copper or silver, and is the material with the smallest resistivity in the world. Electronic appliances generate heat during oper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B15/20B32B37/06B32B37/10C01B32/19C01B32/194
CPCB32B9/007B32B9/041B32B15/20B32B37/06B32B37/10B32B2551/00C01B32/19C01B32/194
Inventor 陈海英周舟卞正国
Owner 宁波顶峰机器人有限公司
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