Oriented graphene/polymer composite system, and preparation method and application thereof

A graphene and polymer technology, used in non-polymer organic compound adhesives, chemical instruments and methods, adhesive additives, etc., can solve the problems of inability to meet thermal conductivity, inability to form composite materials, and large additions. Achieve the effect of high electrical conductivity, efficient heat, and efficient transfer

Inactive Publication Date: 2015-12-23
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires a large amount of graphene, but usually when the graphene content in the polymer reaches about 15wt.%, the composite material cannot be formed, and this preparation method is costly, the addition amount is large, and it cannot meet the requirements of thermal conductivity

Method used

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  • Oriented graphene/polymer composite system, and preparation method and application thereof
  • Oriented graphene/polymer composite system, and preparation method and application thereof
  • Oriented graphene/polymer composite system, and preparation method and application thereof

Examples

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preparation example Construction

[0044] Further, the preparation method of a kind of oriented graphene / polymer composite system of the present invention can comprise:

[0045] Taking the orientation network component containing at least graphene and performing orientation treatment, so that at least part of the graphene is arranged according to the set orientation to form an orientation network,

[0046] And, the matrix component containing at least polymer is combined with the oriented network component to form the oriented graphene / polymer composite system.

[0047] refer to figure 1 Shown is a typical preparation process of oriented graphene / polymer composite system.

[0048] Wherein, the manner of the orientation treatment can at least be selected from but not limited to ball milling, spin coating, solution blending, layer-by-layer self-assembly, electrospinning, solution spinning, melt spinning, twin-screw extrusion, vacuum assisted forming , vacuum filtration, filtration, etc. in one or several ways. ...

Embodiment 1

[0051] Example 1 Preparation of oriented graphene / copper / silicone rubber composite with high thermal conductivity

[0052] 1-1） Add 1g of graphene and 0.5g of copper powder to 250ml of DMF, mix evenly at room temperature, let it stand at room temperature for 48 hours, then let it stand at 80°C for 24 hours, then add silicone rubber dropwise, and solidify at 80°C when saturated After 12 hours, a thermally conductive composite material can be obtained, which can be processed into a thermally conductive pad.

[0053] ） Add 1g of graphene to 250ml of DMF, mix evenly at room temperature, let stand at room temperature for 48 hours, then let stand at 80°C for 24 hours, then add 20g of silicone rubber and 2g of aluminum powder, mix evenly at room temperature, mechanically stir for 15 Minutes, then dropwise add silicone rubber, and cure at 80°C for 12 hours at saturation to obtain a thermally conductive composite material. The compound is processed into a thermal pad.

[0054] ...

Embodiment 2

[0056] Example 2 Preparation of Oriented Graphene / Epoxy Resin Thermally Conductive Composite

[0057] 2-1） Take 1g of graphene and add it to 250ml of NMP, mix evenly at room temperature, filter at room temperature, and then stand at 80°C for 24 hours to form an aligned graphene network. Add 25g of curing agent to 20g of epoxy resin and mechanically stir for 15 minutes, then let it stand in vacuum for 1 hour, then add it dropwise into the oriented graphene network, and cure it at 80°C for 24 hours when it is saturated, to obtain a thermally conductive composite material. It can be processed into thermal conductive resin.

[0058] ） Take 1g of graphene and add it to 250ml of NMP, mix evenly at room temperature, filter at room temperature, and then stand at 80°C for 24 hours to form an aligned graphene network. Take another 1g of graphite and add it to 20g of epoxy resin, stir mechanically for 15 minutes, add 25g of curing agent, continue to stir for 45 minutes, leave it in ...

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Abstract

An oriented graphene/polymer composite system, and a preparation method and an application thereof are provided. The composite system includes an oriented network component at least including graphene and a substrate component compounded with the oriented network component, wherein at least a part of graphene is arranged according to set orientation; the composite system at least has a heat conductivity coefficient in the set direction higher than heat conductivity coefficients in other directions. The preparation method includes the steps: the oriented network component is subjected to orientation treatment, at least a part of graphene is arranged according to the set orientation, and thus an oriented network is formed; and the substrate component at least containing a polymer is taken to be compounded with the oriented network component, and thus the composite system is formed. The composite system has high heat conductivity and high electrical conductive characteristic, can efficiently transfer heat in a needed direction when in use, has the characteristics of being simple, high in efficiency and the like, is suitable for scale production, and has broad application prospects in high-efficiency heat conductivity and heat dissipation.

Description

technical field [0001] The invention relates to a graphene / polymer composite system, in particular to an oriented graphene / polymer composite system with high thermal conductivity, its preparation method and application, and belongs to the field of nanomaterial technology. Background technique [0002] With the development of science and technology and industrial production, people put forward higher requirements on the thermal conductivity of materials. Especially in the field of electrical and electronics, with the high-density integration and volume reduction of electronic components and circuits, materials with higher thermal conductivity are required. Graphene, as the thinnest two-dimensional carbon material, has a stable structure, a large specific surface area and excellent electrical, thermal and mechanical properties. Especially its excellent thermal conductivity (5000W / mK), it has a wide application prospect in the field of thermal conductivity materials. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L63/00C08K3/04C08K3/08C09K5/14C09J4/02C09J11/04
Inventor 刘立伟李奇邱胜强李伟伟郭玉芬陈明亮朱超廖书田刘朝军
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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