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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

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
  • Description
  • Claims
  • Application Information

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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 stable and continuous heat conduction path, and provides a graphene thermally conductive film / thermally conductive silica gel film with a layered alternating structure Composite material and its preparation method

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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specific Embodiment approach 1

[0026] Specific embodiment one: This embodiment is a graphene thermally conductive film / thermally conductive silica gel film composite material with a layered alternating structure, specifically composed of a graphene thermally conductive film and a thermally conductive silica gel film, the graphene thermally conductive film and thermally conductive silica gel The films are arranged alternately; the thickness of the heat-conducting silica film is 0.1 mm to 10 mm.

specific Embodiment approach 2

[0027] Specific embodiment two: this embodiment is the preparation method of the graphene heat-conducting film / heat-conducting silica gel film composite material of layered alternating structure in the specific embodiment one, specifically carry out according to the following steps::

[0028] 1. Preparation of graphene thermal conductive film: Use a high-speed mixer to uniformly mix the graphene oxide aqueous solution, reducing agent and nanocellulose for 5 minutes to 10 minutes, then ultrasonically treat for 20 minutes to 60 minutes, and then stand at a temperature of 60°C to 90°C Reduction reaction 2h~6h, suction filtration on the mixed fiber microporous membrane, wash the filter cake with ethanol and water alternately until the filtrate is 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 thermal conductivity film;

[0029] The c...

specific Embodiment approach 3

[0038] Embodiment 3: This embodiment is different from Embodiment 2 in that: the reducing agent described in step 1 is hydrazine hydrate, sodium borohydride, hydroiodic acid or vitamin C. Others are the same as 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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