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Graphite-silicone rubber composite material and preparation method thereof

A composite material and silicone rubber technology, applied in chemical instruments and methods, lamination devices, lamination auxiliary operations, etc., can solve the problems of poor thermal conductivity and good thermal conductivity between surfaces

Active Publication Date: 2021-11-26
上海六晶科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the technical difficulty of using graphite paper as a thermal conductive material lies in its good thermal conductivity in the plane and poor thermal conductivity between the planes.

Method used

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  • Graphite-silicone rubber composite material and preparation method thereof
  • Graphite-silicone rubber composite material and preparation method thereof

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preparation example Construction

[0039] In a specific embodiment, the present application provides a method for preparing a graphite-silicone rubber composite material based on a graphite substrate. The graphite-silicon rubber composite material described in the present invention is a multi-layer composite material filled with graphite paper and silicone rubber. Forming a sandwich composite material, the specific steps are as follows:

[0040] a. Use graphite paper with a purity greater than 99% as the substrate;

[0041] b. Place the substrate described in a in 55-75°C alkaline degreasing water for ultrasonic oscillation, and use distilled water for cleaning after completion;

[0042] c. Use absolute ethanol or acetone as a solvent to prepare a KH-550 solution with a mass fraction of 5-20%;

[0043] d. Soak the cleaned graphite paper in the prepared KH-550 solution in step c, and then take it out to dry;

[0044] e. place a layer of the graphite paper obtained by step d that is spread;

[0045] f. spray a...

Embodiment 1

[0065] In the present embodiment, a preparation method of a graphite-silicon rubber composite material is provided, comprising the following steps:

[0066] a. Select graphite paper with a purity greater than 99.99% and a thickness of 0.231mm as the base material.

[0067] b. Place the substrate in alkaline degreasing water (concentration 30%) at 55°C with ultrasonic vibration for more than 30 minutes, and rinse and clean with distilled water several times after completion;

[0068] c. Use absolute ethanol as a solvent to prepare a KH-550 solution with a mass fraction of 8% for surface modification of the substrate;

[0069] d. Soak the cleaned graphite paper in the KH-550 solution in step c for more than 60 minutes, then take it out, put it into a hot air box and dry it for more than 60 minutes at a temperature of more than 80°C;

[0070] e. place a layer of graphite paper that is spread evenly and obtained by the above step d;

[0071] f. spray a layer of methyl vinyl sili...

Embodiment 2

[0079] In the present embodiment, a preparation method of a graphite-silicon rubber composite material is provided, comprising the following steps:

[0080] a. Select graphite paper with a purity greater than 99.99% and a thickness of 0.367mm as the base material.

[0081] b. Place the substrate in alkaline degreasing water (50% concentration) at 75°C for ultrasonic oscillation for more than 30 minutes, and rinse with distilled water for several times after completion;

[0082] c. Use absolute ethanol as a solvent to prepare a KH-550 solution with a mass fraction of 20% for surface modification of the substrate;

[0083] d. Soak the cleaned graphite paper in the KH-550 solution in step c for more than 60 minutes, then take it out, put it into a hot air box and dry it for more than 60 minutes at a temperature of more than 80°C;

[0084] e. place a layer of graphite paper that is spread evenly and obtained by the above step d;

[0085] f. spray a layer of methyl vinyl silicone...

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Abstract

The invention relates to a graphite-silicone rubber composite material and a preparation method thereof. The preparation method comprises the following steps: selecting graphite paper as a matrix; performing ultrasonic oscillation on the substrate in alkaline oil removal water at 55-75 DEG C, and cleaning the substrate in distilled water; preparing a KH-550 solution with the mass fraction concentration of 5-20% by using absolute ethyl alcohol or acetone as a solvent; soaking the cleaned graphite paper in a prepared KH-550 solution, and then taking out and drying the graphite paper; placing a layer of spread graphite paper; spraying a layer of methyl vinyl silicone rubber with uniform thickness on the upper surface of the graphite paper by using a spraying machine; placing a layer of spread graphite paper on the upper surface of the methyl vinyl silicone rubber; repeating the steps; applying continuous constant pressure to completely cure the material after preset time; and shearing the graphite paper along a direction perpendicular to the spreading direction to obtain the formed graphite-silicone rubber composite material. According to the method, the graphite-silicone rubber composite material with uniform thickness and high bonding strength can be obtained.

Description

technical field [0001] The invention relates to the field of graphite-based composite materials, in particular to a graphite-silicon rubber composite material and a preparation method thereof. Background technique [0002] With the trend of miniaturization of modern electronic products, exploring materials and devices that meet special needs and studying their preparation process, control conditions and related properties have become the research topic of many researchers. In order to meet the market demand, generally speaking, as the volume of electronic devices becomes smaller and smaller, more and more heat is generated, and the heating phenomenon during use becomes more and more serious. Therefore, in the field of microelectronic packaging, a composite material with high thermal conductivity and certain flexibility and compressibility is required. [0003] Commonly used metals have good thermal conductivity and plasticity and are favored. However, due to the easy oxida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B7/12B32B37/10B32B37/12B32B38/16B32B38/08B32B38/00D21H27/30
CPCB32B9/007B32B9/04B32B7/12B32B37/10B32B37/1284B32B38/162B32B38/164B32B38/08B32B38/0004D21H27/30B32B2307/302B32B2307/718
Inventor 朱玉斌汪恒青陈捷陈晨黄泽军
Owner 上海六晶科技股份有限公司
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