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A kind of composite material and preparation method thereof

A composite material and uniform mixing technology, applied in the field of materials, can solve the problems of limited heat dissipation performance of heat dissipation materials and difficulty in meeting heat dissipation requirements

Active Publication Date: 2019-02-26
XIAN RUIXIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat dissipation performance of heat dissipation materials made of inorganic metal compounds as heat conduction particles is limited, and it is difficult to meet the increasingly high heat dissipation requirements of current electronic equipment.

Method used

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  • A kind of composite material and preparation method thereof
  • A kind of composite material and preparation method thereof
  • A kind of composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] refer to figure 1 and figure 2 , an embodiment of the present invention provides a composite material, the composite material includes at least two thermally conductive particles, graphene, and an organic matrix, wherein at least two thermally conductive particles are dispersed in the organic matrix, and the surface of the thermally conductive particles is covered with graphene, and At least two heat-conducting particles are bridged through graphene.

[0039] Due to the excellent thermal conductivity of graphene, the thermal conductivity of the thermally conductive particles covered with graphene can be improved; moreover, at least two thermally conductive particles are bridged by graphene, due to the effective contact between at least two thermally conductive particles The area becomes larger, so the heat conduction speed between the at least two heat-conducting particles is accelerated, thereby further enhancing the heat-conducting capability of the heat-conducting ...

Embodiment 2

[0072] Based on the same inventive concept, the embodiment of the present invention is a method for preparing a composite material, Figure 4 It is a schematic flow chart of the preparation method, including the following steps:

[0073] Step 101: uniformly mixing heat-conducting particles, graphene, and an organic matrix to form a precursor, wherein, in the precursor, the surface of the heat-conducting particles is covered with graphene, and at least two heat-conducting particles are bridged by graphene;

[0074] Step 102: Curing and molding the precursor to obtain a composite material.

[0075] Specifically, the method of uniformly mixing the thermally conductive particles, graphene, and organic matrix in step 101 includes: placing the thermally conductive particles, graphene, and organic matrix in a reaction vessel, using a ball mill for ball milling, or using a twin-screw extruder for Extrusion, or mixing with an internal mixer, or mixing with an open mixer, or mixing wit...

Embodiment approach 1

[0095] In the above step 101, add 0.90 parts by weight of micron-sized boron nitride, 0.10 parts by weight of multilayer graphene oxide, 0.75 parts by weight of methyl silicone rubber, and 0.08 parts by weight of curing agent in the reactor, and stir at high speed to obtain a composite material precursors;

[0096] In the above step 102, the precursor is placed at 100 degrees Celsius, and the pouring method is used to obtain a multi-component composite material with uniform graphene and micron-sized traditional heat-conducting particles, and the thermal conductivity is 1.7W / mK.

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Abstract

A composite material and a preparation method therefor. The composite material can improve the heat dissipation capacity of a heat dissipation material to a certain extent, and is used for solving the problem of the limited heat dissipation performance of the heat dissipation material. The composite material comprises at least two heat conduction particles, graphene and an organic matrix, wherein the at least two heat conduction particles are dispersed in the organic matrix; the surface of the heat conduction particles are covered with the graphene; and the at least two heat conduction particles are bridged by means of the graphene.

Description

technical field [0001] The invention relates to the field of materials, in particular to a composite material and a preparation method thereof. Background technique [0002] As the volume of electronic devices becomes smaller and smaller, the requirements for the heat dissipation capability of materials are also higher and higher. At present, heat dissipation materials are mainly formed by adding heat-conducting particles into an organic matrix, among which, commonly used heat-conducting particles are inorganic metal compounds such as aluminum oxide, magnesium oxide, and zinc oxide. However, heat dissipation materials made of inorganic metal compounds as heat conduction particles have limited heat dissipation performance, and it is difficult to meet the increasingly high heat dissipation requirements of current electronic equipment. Contents of the invention [0003] Embodiments of the present invention provide a composite material and a preparation method thereof, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/08C08K13/06C08K9/04C08K3/04C08K3/22C08K3/28C08K3/38C08K3/34
CPCC08K3/04C08K3/22C08K3/28C08K3/34C08K3/38C08K9/04C08K13/06C08L83/04C08L83/08
Inventor 高超魏杨扬徐焰
Owner XIAN RUIXIN TECH CO LTD