Graphene composite heat dissipation film and preparation method thereof

A technology of graphene composite and heat dissipation film, which is applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve the problem that graphene heat-conducting film cannot be prepared with high-quality heat-conducting film, achieve good dispersion and reduce operating costs Effect

Active Publication Date: 2019-04-16
国宏中晶集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a novel method for preparing a graphene heat-conducting film to solve the problem that the graphene heat-conducting film of the prior art cannot prepare a high-qualit

Method used

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  • Graphene composite heat dissipation film and preparation method thereof
  • Graphene composite heat dissipation film and preparation method thereof

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Example Embodiment

[0015] Example 1

[0016] A graphene composite heat-dissipating film and a preparation method thereof, wherein the graphene composite heat-dissipating film as claimed in claim 4 is prepared, characterized in that, comprising the following steps: 1) a graphene microplate preparation step: expanding with a large amount of prefabricated Graphite flakes are used as raw materials, and are exfoliated by high-frequency ultrasonic for more than 1-2 hours in absolute ethanol to generate graphene microplatelet dispersion; Ultrasonic vibration for 3-5min, immediately discard the upper half of the dispersion, and then replenish it to a volume of more than 200-300ml, repeat the above process at least 5-10 times, until a part of the sample is taken and observed by SEM or AFM, the graphene microplate The average radial size is higher than 5-10um; all the solvent is distilled off to obtain graphene micro-sheets with large radial size.

[0017] 2) Preparation steps: prepare a square or circul...

Example Embodiment

[0020] Example 2

[0021] As the method given in Example 1, in step (1), the solvent absolute ethanol of the graphene microplatelet dispersion liquid is supplemented to more than 220ml, high-intensity ultrasonic vibration is 4min, immediately discard the upper half of the dispersion liquid, and then replenish To a volume above 220ml, repeat the above process at least 8 times until the average radial size of the graphene microplatelets is higher than 5um.

[0022] In described step (3), put into the anhydrous chloroform of 270 weight parts after cleaning and drying, under the speed of stirring rod 3-5 rev / sec, be heated to 26 ℃ and keep, described graphene sieve bucket The lower surface is a polyurethane porous plate with an average aperture of 100-150um; 0.8 parts by weight of ZnO quantum dots are sieved in from a certain opening of a four-necked bottle with a quantum dot sieve barrel, and the lower surface of the quantum dot sieve barrel is Polyurethane porous plate with an ...

Example Embodiment

[0024] Example 3

[0025] As the method given in Example 1, in step (1), the solvent absolute ethanol of the graphene microplatelet dispersion is supplemented to more than 270ml, high-intensity ultrasonic vibration is 5min, immediately discard the upper half of the dispersion, and then add To a volume above 270ml, repeat the above process at least 10 times until the average radial size of the graphene microplatelets is higher than 6um.

[0026]In described step (3), put into the anhydrous chloroform of 320 weight parts after cleaning and drying, under the speed of stirring rod 5-7 rev / sec, be heated to 28 ℃ and keep, described graphene sieve bucket The lower surface is a polyurethane porous plate with an average aperture of 150-200um; 1.2 parts by weight of ZnO quantum dots are sieved in from a certain opening of a four-necked bottle with a quantum dot sieve barrel, and the lower surface of the quantum dot sieve barrel is Polyurethane porous plate with an average pore size of...

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Abstract

The invention relates to a graphene composite heat dissipation film. The composite heat dissipation film is a laminated sheet layer of at least 20 layers or more, and comprises 100 parts by weight ofgraphene nanoplatelets with large radial sizes and 0.5-2 parts by weight of ZnO quantum dots 90% attached to the surface of graphene. The preparation steps include a graphene nanoplatelets preparationstep, a preparation step, a dispersion liquid preparation step and a heat dissipation film preparation step.

Description

technical field [0001] The invention relates to the technical field of a composite heat dissipation film containing graphene, in particular to a composite heat dissipation film containing graphene and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional material composed of carbon atoms with a thickness of only one atom. It has excellent physical and chemical properties, such as excellent mechanical properties, high electrical conductivity, and good thermal conductivity. It is considered to be the most One of the potential nanomaterials. As a one-dimensional carbon nanomaterial, carbon nanofiber has the advantages of good mechanical properties, large specific surface area and good chemical stability. These special properties make it widely used in catalyst supports, polymer nanocomposites, energy Flexible substrate materials for conversion and storage devices, etc. Taking graphene microchip as an example, it not only has good physical p...

Claims

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Application Information

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IPC IPC(8): H01L21/48H01L23/373
CPCH01L21/4871H01L23/3735H01L23/3738
Inventor 张岩付吉国董伟赵然周卫东曾蕾
Owner 国宏中晶集团有限公司
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