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Oriented graphene thermally conductive foam, graphene thermally conductive film, preparation method thereof, and electronic product

A technology of oriented alignment and graphene heat conduction film, which is applied in the field of heat conduction materials, can solve the problems of poor longitudinal thermal conductivity and failure to meet the performance requirements of graphene heat conduction film, and achieve the effect of simple operation and strong controllability

Active Publication Date: 2022-05-17
GUANGDONG MORION NANOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the graphene heat-conducting film prepared by the existing preparation method has a certain transverse thermal conductivity and poor longitudinal thermal conductivity, which cannot meet the actual performance requirements of the graphene heat-conducting film.

Method used

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  • Oriented graphene thermally conductive foam, graphene thermally conductive film, preparation method thereof, and electronic product
  • Oriented graphene thermally conductive foam, graphene thermally conductive film, preparation method thereof, and electronic product
  • Oriented graphene thermally conductive foam, graphene thermally conductive film, preparation method thereof, and electronic product

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preparation example Construction

[0057] According to a first aspect of the present invention, there is provided a method for preparing a directional arrangement of graphene thermally conductive foam, comprising the following steps:

[0058] (a) Partial graphene oxide slurry is injected into a tank containing an array grid, and when the graphene oxide slurry is frozen to the point where there is no fluidity, the array grid is removed from the tank to obtain the first graphene oxide;

[0059] (b) After removal from the array grid, another part of the graphene oxide slurry is injected into the gap and upper surface left by the first graphene oxide, frozen again until the graphene oxide slurry has no fluidity, and then dried to give the graphene oxide;

[0060] (c) The graphene dioxide is carbonized and graphitized and optionally pressed to obtain a directional arrangement of graphene thermally conductive foam.

[0061] Specifically, in step (a), graphene oxide slurry refers to a mixed slurry formed by graphene oxide a...

Embodiment 1

[0109] The present embodiment provides a method for preparing a directional arrangement of graphene thermally conductive foam, comprising the following steps:

[0110] (a) The height of 2 mm, circular miniature through hole diameter of 3 cm array mesh (specific structure such as Figure 1 and Figure 2Shown) placed in a 5mm high tank, the solid content of 5% of the partial graphene oxide slurry directly into the tank, when the graphene oxide slurry height and the array grid height can be at the same time, and then the tank containing graphene oxide slurry is placed in the freezer freezer freezing, freezing temperature is -20 ° C, freezing time is 3h. The graphene oxide slurry can be removed without fluidity, and then the array grid is directly extracted to obtain the first graphene oxide.

[0111] (b) After removal from the array grid, the first graphene oxide slurry is injected with another part of the graphene oxide slurry with a solid content of 5% and the upper surface of the ...

Embodiment 2

[0114] The present embodiment provides a method for preparing a directional arrangement of graphene thermally conductive foam, comprising the following steps:

[0115] (a) The height of 50mm, circular micro through hole diameter of 3cm array grid placed in a 100mm height of the tank, the solid content of 5% of the part of the graphene oxide slurry directly into the tank, when the height of graphene oxide slurry and the height of the array grid can be, and then the tank containing graphene oxide slurry is placed in the freezer freezer, freezing temperature is -20 °C, freezing time is 3h. The graphene oxide slurry can be removed without fluidity, and then the array grid is directly extracted to obtain the first graphene oxide.

[0116] (b) After removal from the array grid, the first graphene oxide slurry is injected with another part of the graphene oxide slurry with a solid content of 5% and the upper surface of the solid content of 5% until it is the same as the height of the tan...

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Abstract

The invention provides a graphene heat-conducting foam with an orientation arrangement, a graphene heat-conducting film, a preparation method thereof, and an electronic product, and relates to the technical field of heat-conducting materials. The preparation method of the graphene heat-conducting foam is to use a grid array and a groove with a specific structure to preliminarily orientate a part of the graphene oxide slurry under freezing conditions, and then separate the grid array from the part of the graphene oxide slurry to obtain The first graphene oxide, then by injecting another part of graphene oxide slurry into the gap and upper surface of the first graphene oxide, and then freezing and drying it to obtain the second graphene oxide, and finally After carbonization and graphitization treatment, an aligned graphene heat-conducting foam is obtained. The present invention also provides a graphene heat-conducting film, which is formed by pressing the above-mentioned graphene heat-conducting foam. The graphene heat-conducting film not only has a higher in-plane thermal conductivity, but also has a higher longitudinal thermal conductivity.

Description

Technical field [0001] The present invention relates to the technical field of thermally conductive materials, in particular to a directional arrangement of graphene thermally conductive foam, graphene thermal conductive film and preparation method thereof and electronic products. Background [0002] With the advent of the 5G era, the design of electronic equipment is developing towards thinness, intelligence and multi-functionality. This multifunctional electronic device will inevitably involve the acquisition, transmission and storage of data. Electronic devices need to transmit more data information at a time, the transmission speed becomes faster, the heat generation becomes more, and the heat dissipation performance of the equipment is also higher. For example, the heat dissipation requirements of 5G mobile phones, 5G mobile phones are different from 4G mobile phones as follows: 1) the processor performance is greatly improved, and some processors use the design of the exte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184H05B3/14
CPCC01B32/184H05B3/145H04W88/02H04M1/0202Y02D30/70C01B32/198C01B32/182C01B32/20C04B35/522C09K5/14H01B1/04H05K7/20481
Inventor 郝振亮蔡金明
Owner GUANGDONG MORION NANOTECHNOLOGY CO LTD
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