Graphene thermal-conductive film/thermal-conductive silica gel film composite material with layered alternative structure and preparation method of composite material

A heat-conducting silica gel and alternating structure technology, applied in chemical instruments and methods, lamination, lamination devices, etc., can solve problems such as difficulty in forming a stable and continuous heat conduction path, difficulty in graphene dispersion, etc., to improve tear resistance and mechanical properties Performance, excellent mechanical properties, good thermal conductivity

Active Publication Date: 2018-11-16
HARBIN UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The present invention is to solve the technical problem that the graphene in the existing graphene/thermally conductive silica gel composite material is difficult to disperse, and it is difficult to form a

Method used

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  • Graphene thermal-conductive film/thermal-conductive silica gel film composite material with layered alternative structure and preparation method of composite material

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Experimental program
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Example Embodiment

[0026] Embodiment 1: This embodiment is a graphene thermally conductive film / thermally conductive silicone film composite material with a layered alternating structure, which is specifically composed of a graphene thermally conductive film and a thermally conductive silicone film. The graphene thermally conductive film and the thermally conductive silicone The membranes are arranged alternately; the thickness of the thermally conductive silica gel membrane is 0.1 mm to 10 mm.

Example Embodiment

[0027] Embodiment 2: This embodiment is a method for preparing a graphene thermally conductive film / thermally conductive silicone film composite material with a layered alternating structure in Embodiment 1, which is specifically carried out according to the following steps:

[0028] 1. Preparation of graphene thermal conductive film: The graphene oxide aqueous solution, reducing agent and nanocellulose are uniformly mixed for 5min-10min with a high-speed mixer, then ultrasonically treated for 20min-60min, and then allowed to stand at a temperature of 60℃-90℃ Reduction reaction for 2h~6h, suction filtration on mixed fiber microporous membrane, alternately wash the filter cake with ethanol and water until the filtrate becomes neutral, after washing, the filter cake is dried at a temperature of 80℃~120℃ for 2h~6h, and the mixed The fiber microporous filter membrane and the filter cake are peeled off to obtain a graphene thermally conductive membrane;

[0029] The concentration o...

Example Embodiment

[0038] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the reducing agent described in step 1 is hydrazine hydrate, sodium borohydride, hydroiodic acid or vitamin C. Others are the same as in the second embodiment.

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Abstract

The invention discloses a graphene thermal-conductive film/thermal-conductive silica gel film composite material with a layered alternative structure and a preparation method of the composite material, and relates to the graphene/thermal-conductive silica gel composite material and the preparation method thereof. The invention aims to solve the technical problems that graphene in a current graphene/thermal-conductive silica gel composite material is difficult to disperse, and a stable and continuous thermal-conductive path is difficult to form. The composite material is composed of graphene thermal-conductive films and thermal-conductive silica gel films, and the graphene thermal-conductive films and the thermal-conductive silica gel films are alternately arranged. The preparation method of the composite material comprises the following steps: 1, preparing the graphene thermal-conductive film; 2, preparing thermal-conductive silica gel; and 3, preparing the graphene thermal-conductivefilm/thermal-conductive silica gel film composite material with the layered alternative structure. The method disclosed by the invention adopts a method of compounding nanocellulose and graphene to prepare the graphene thermal-conductive film, and utilizes an interface technology to compound the graphene thermal-conductive film with the thermal-conductive silica gel film to form the graphene/thermal-conductive silica gel film composite material with the layered alternative structure, and the composite material meets the requirements for high-performance thermal-conductive materials in the fields such as aviation, aerospace, electronic and electrical engineering.

Description

technical field [0001] The invention relates to a graphene / thermally conductive silica gel composite material and a preparation method thereof. Background technique [0002] In recent years, with the development of the economy and the advancement of technology, people have higher and higher requirements for high-performance thermally conductive elastomers. For example, the sealing products of high-performance electronic products require excellent heat dissipation and insulation effects, and are also moisture-proof and dust-proof. Shockproof; chemical industry production and wastewater treatment require materials for heat exchange devices to have good thermal conductivity, high temperature resistance and chemical corrosion resistance; some parts on automobile engines use temperatures as high as 205 ° C, which is difficult for general-purpose rubber. Thermally conductive silicone rubber has excellent heat dissipation, shock absorption, chemical corrosion resistance and wide op...

Claims

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Application Information

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IPC IPC(8): B32B3/26B32B9/00B32B9/04B32B33/00B32B37/02B32B38/16
CPCB32B3/266B32B9/007B32B9/04B32B33/00B32B37/02B32B38/16B32B2307/202B32B2307/206B32B2307/302B32B2307/5825
Inventor 韩志东王博王春锋王永亮
Owner HARBIN UNIV OF SCI & TECH
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