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Method for preparing graphene blocks and graphene blocks prepared by same

A technology of graphene and graphene film, which is applied in the field of electronic materials, can solve the problems of limited application, high price, and complex preparation process of highly oriented pyrolytic graphite, and achieve the effects of wide application, low price, and short manufacturing cycle

Active Publication Date: 2016-06-22
CHANGZHOU FUXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of highly oriented pyrolytic graphite is complex and expensive, and its application is greatly limited.

Method used

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  • Method for preparing graphene blocks and graphene blocks prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Disperse 1 kg of graphene oxide in 99 kg of water to prepare a graphene oxide slurry with a solid content of 1%; sieve the prepared slurry to remove air bubbles, then use a coating device to coat 3 mm, and dry to obtain a 30 μm thick Graphene oxide film; spray polysiloxane on both sides of the dry graphene oxide film; then cut into 150mm×150mm squares, stack 1000 pieces together; , heated to 1500°C; use the graphitization furnace to heat the block obtained above to 2900°C for graphitization; finally obtain a highly oriented graphene heat conduction block of 150mm×150mm×6mm, with a density of 2.2g / cm3, heat conduction The coefficient reaches 1500W / m·K.

Embodiment 2

[0020] Disperse 3kg of graphene oxide in 97kg of NMP to prepare a graphene oxide slurry with a solid content of 3%; sieve the prepared slurry to remove air bubbles, then use a coating equipment to coat 3mm, and dry to obtain a 100μm thick graphene oxide film; spray TiO2 on both sides of the dry graphene oxide film; then cut into 150mm×150mm squares, 1000 pieces stacked together; Heating to 1700°C; heat the block obtained above to 3000°C in a graphitization furnace for graphitization; finally obtain a highly oriented graphene heat conducting block of 150mm×150mm×18mm, with a density of 2.2g / cm3 and a thermal conductivity of Up to 1500W / m·K.

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Abstract

The invention provides a method for preparing graphene blocks. According to the method provided by the invention, a plurality of graphene oxide films are heated at high pressure under the action of a binding aid to form graphene blocks. According to the method for preparing the graphene blocks, graphene oxide is used as a raw material to prepare highly-oriented graphene heat-conduction blocks, and each of the highly-oriented graphene heat-conduction blocks can be made to be larger in size to reach a volume over 400*400*400mm, instead of highly-oriented pyrolytic graphite. The method provided by the invention is simple in process, short in preparation cycle, low in cost and more widely applied.

Description

technical field [0001] The invention relates to the field of electronic materials, in particular to a method for preparing a graphene block and a product obtained therefrom. Background technique [0002] Highly oriented pyrolytic graphite has a highly oriented layered structure and has a high thermal conductivity in the x-y plane. It can be used as a thermally conductive functional material to homogenize the surface temperature of objects. However, the preparation process of highly oriented pyrolytic graphite is complex and expensive, and its application is greatly limited. [0003] Therefore, it is necessary to provide a simpler and easier preparation method to obtain graphene blocks with high directional thermal conductivity. Contents of the invention [0004] The invention proposes a method for preparing graphene blocks, which has simple process, short manufacturing cycle and wide application. [0005] The technical solution of the present invention is realized in the...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 相小琴周步存
Owner CHANGZHOU FUXI TECH CO LTD
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