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Preparation method of graphene composite material with heat conduction function

A graphene composite and composite material technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of poor dispersion of graphene and limited applications

Active Publication Date: 2022-07-08
宝泰隆新材料股份有限公司北京技术研发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersion of graphene in resin materials is not good, which limits its application in thermal conductive materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) adopt one-pot method, and graphene oxide and graphene are mixed and stirred for 2 hours, rotating speed 700r / min, obtains mixture. The oxygen content in the above mixture is 57wt%;

[0027] (2) Mix the mixture obtained in step (1), epoxy resin and other additives (select Digao 450 as a leveling agent) according to a mass ratio of 5:90:5, and add ethanol as a solvent. The mass ratio of the mixture, epoxy resin and other additives to the solvent is 1:4 to obtain the graphene composite slurry;

[0028] (3) The graphene composite slurry is placed in a mold, and then reacted in a constant temperature drying oven: the first stage, heated to 90 ° C, and reacted for 8 hours; the second stage, heated to 190 ° C, and continued for 1 hour; In the third stage, the temperature is continued to rise to 260° C. and the reaction is performed for 8 hours to obtain the graphene composite material.

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Abstract

The invention provides a preparation method of a graphene composite material with a heat conduction function, which comprises the following steps: mixing and stirring graphene oxide and graphene to obtain a mixture, adding aggregate and a solvent into the mixture, and mixing and stirring to obtain graphene composite slurry, and injecting the graphene composite slurry into a mold, and heating and curing to obtain the graphene composite material with the heat conduction function. The processes of stamping, hot pressing and the like can be adopted to process the obtained graphene composite material with the heat conduction function, the shape and the size of the graphene composite material are changed, and cooling fins or heat conduction gaskets with different thicknesses are prepared. And when the heat-conducting gasket is produced as a heat-conducting gasket base material, the thickness can be customized. The graphene composite slurry obtained in the step (2) can also be dissolved in a solvent to be used as a heat dissipation slurry or a heat conduction binder.

Description

technical field [0001] The invention relates to the technical field of carbon composite materials, in particular to a preparation method of a graphene composite material with thermal conductivity. Background technique [0002] Polypropylene, a polyolefin compound, is currently the general-purpose plastic with the highest annual growth rate. Due to its low density, high impact strength, easy molding, stable chemical properties, excellent electrical insulation, non-toxicity and many other advantages, it is widely used in automotive interior and exterior parts, electronic appliances, food and other fields. However, due to its shortcomings such as cold resistance, aging resistance, poor scratch resistance, high VOC content, and easy combustion, its application range is limited. In order to further expand its application range, it needs to be modified. [0003] Graphene is a two-dimensional carbon nanomaterial with a hexagonal honeycomb lattice composed of carbon atoms with sp2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K3/04C09K5/14
CPCC08K3/042C09K5/14C08L63/00Y02E60/10
Inventor 杨志涛
Owner 宝泰隆新材料股份有限公司北京技术研发中心
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