Graphene-reinforced heat-conducting polymer composite material and preparation method thereof and heat-conducting product

A technology of thermally conductive polymers and composite materials, applied in the field of thermally conductive materials, can solve problems such as high phonon scattering, reduced thermal conductivity, uneven dispersion of graphene, etc., achieve good surface modification, save dispersion time, and shorten preparation and the effect of the surface modification cycle

Active Publication Date: 2020-05-29
内蒙古信敏惠纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the large surface energy of graphene and the high degree of scattering of phonons at the interface between graphene and polymer matrix, the dispersion of graphene in the graphene-enhanced thermally conductive polymer composite obtained by mixing graphene and polymer matrix is ​​not good. Uniform, resulting in reduced thermal conductivity of graphene-enhanced thermally conductive polymer composites

Method used

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  • Graphene-reinforced heat-conducting polymer composite material and preparation method thereof and heat-conducting product
  • Graphene-reinforced heat-conducting polymer composite material and preparation method thereof and heat-conducting product
  • Graphene-reinforced heat-conducting polymer composite material and preparation method thereof and heat-conducting product

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Embodiment 1

[0030] In order to shorten the preparation cycle of the graphene-enhanced thermally conductive polymer composite material and ensure the uniformity of graphene dispersion in the graphene-enhanced thermally conductive polymer, an embodiment of the present invention provides a graphene-enhanced thermally conductive polymer composite material and a preparation method thereof. see figure 1 , the preparation method of the graphene-enhanced thermally conductive polymer composite material comprises:

[0031] Step 1): The graphite is subjected to liquid phase exfoliation to obtain a graphene dispersion. It should be noted that the above-mentioned graphite can be selected according to the actual situation, as long as the graphite has a relatively high fixed carbon content. For example: the above-mentioned graphite may be at least one of flake graphite, spherical graphite, graphite oxide, expandable graphite and expanded graphite.

[0032] Step 2): The first modifier and the above-men...

Embodiment 2

[0069] An embodiment of the present invention provides a graphene-reinforced thermally conductive polymer composite material. The graphene-enhanced heat-conducting polymer composite material is prepared by the preparation method of the above-mentioned graphene-enhanced heat-conducting polymer composite material.

[0070] The technical effect of the graphene-reinforced thermally conductive polymer composite material provided by the embodiment of the present invention is the same as the technical idea of ​​the above-mentioned preparation method of the graphene-reinforced thermally conductive polymer composite material, and will not be repeated here.

[0071] Exemplarily, the above-mentioned graphene-high thermal conductivity polymer composite material includes the following components: 30-75 parts by mass of polymer matrix, 1-40 parts by mass of modified graphene, 1-55 parts by mass of thermally conductive filler, and 10-20 parts by mass of processing aids.

[0072] Specificall...

Embodiment 3

[0074] This embodiment provides a heat conduction product. The thermally conductive product includes the above-mentioned graphene-enhanced thermally conductive polymer composite material.

[0075] Specifically, the heat conduction product mentioned above is a heat dissipation base for LED electronic lamps.

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Abstract

The invention discloses a graphene-reinforced heat-conducting polymer composite material and a preparation method thereof and a heat-conducting product, relates to the technical field of heat-conducting materials, and is used for improving the dispersity of graphene in the graphene-reinforced heat-conducting polymer composite material, so that the graphene composite material has relatively good heat-conducting property. The preparation method of the graphene reinforced heat-conducting polymer composite material comprises the following steps: carrying out liquid-phase stripping on graphite to obtain a graphene dispersion liquid; mixing the first modifier with the graphene dispersion liquid by a mill to obtain modified graphene dispersion liquid; separating from the modified graphene dispersion liquid to obtain modified graphene; and carrying out melt blending on the modified graphene, a heat-conducting filler, a polymer matrix and a processing aid to obtain the graphene reinforced heat-conducting polymer composite material. The graphene-reinforced heat-conducting polymer composite material is prepared by the preparation method of the graphene-reinforced heat-conducting polymer composite material. The heat conduction material comprises the graphene reinforced heat conduction polymer composite material.

Description

technical field [0001] The invention relates to the technical field of heat-conducting materials, in particular to a graphene-enhanced heat-conducting polymer composite material, a preparation method thereof, and a heat-conducting product. Background technique [0002] Graphene has a unique two-dimensional periodic honeycomb lattice structure, and the stable carbon six-membered ring in its structural unit endows graphene with excellent high thermal conductivity (>5000W / m·K), making graphene have better Thermal conductivity, mechanical properties and electrical conductivity. Therefore, the graphene-enhanced thermally conductive polymer composite obtained after mixing graphene with a polymer matrix has good thermal conductivity. [0003] However, due to the large surface energy of graphene and the high degree of scattering of phonons at the interface between graphene and polymer matrix, the dispersion of graphene in the graphene-enhanced thermally conductive polymer composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L25/06C08L77/02C08L77/06C08L69/00C08L55/02C08L23/08C08L51/06C08L91/06C08K13/06C08K9/04C08K9/06C08K3/04C08K3/22C08K3/34C09K5/14
CPCC08L23/12C08L23/06C08L25/06C08L77/02C08L77/06C08L69/00C08L55/02C08L23/0815C09K5/14C08K2003/222C08L2205/03C08L51/06C08L91/06C08K13/06C08K9/04C08K3/042C08K3/22C08K3/34C08L51/006C08K9/06
Inventor 徐欢徐玮彤郭晓然张新和张志博刘耘成朱亚坤李金来
Owner 内蒙古信敏惠纳米科技有限公司
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