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A thermally conductive shielding silicone material and preparation method thereof

A technology of organic silicon and flexible materials, which is applied in the field of thermally conductive shielding multifunctional organic silicon materials and its preparation, can solve the problems of multi-contact thermal resistance of thermally conductive particles, the inability to obtain light-weight and high-thermal-conductivity thermal interface materials, and achieve the elimination of contact heat Resistance, simplified assembly structure and volume, good plane shielding effect

Active Publication Date: 2020-09-04
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing preparation technology of organic silicon thermal interface materials is mainly by adding thermally conductive inorganic powders with relatively high density to organic silicon materials, or then constructing thermal conduction channels through close packing between particles, which requires a large number of powders with different particle sizes The heat conduction performance can only be achieved by the body, and there is a lot of contact thermal resistance between the heat conduction particles, which makes it impossible to obtain a lightweight and high thermal conductivity thermal interface material.

Method used

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  • A thermally conductive shielding silicone material and preparation method thereof

Examples

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Embodiment 1

[0041] A preparation method of corrugated silicone graphene composite material (corrugated paper core thickness 10mm):

[0042] (1) Using a 25 μm graphene film as the raw material paper, a wave-shaped foldable and stretchable core material is made by a wave folding device;

[0043] (2) The wave-shaped folded core material is compressed and placed in a mold to be pressed and shaped, then liquid silicone rubber is poured, vacuumed to remove bubbles, and cured at 150°C for 30 minutes to obtain a silicone composite material for heat conduction shielding. The composition and weight ratio of the liquid silicone rubber are as follows: 100 parts by weight of 1000 mPa·s vinyl-terminated polysiloxane, 5.5 parts by weight of methyl hydrogen polysiloxane crosslinking agent, 0.3 parts by weight of platinum catalyst, 0.2 parts by weight Butynol inhibitor in parts by weight and KH-560 surface treatment agent in 1.5 parts by weight are mixed to form liquid silica gel. The thermal conductivit...

Embodiment 2

[0045] A preparation method of corrugated organosilicon-graphite composite material (corrugated paper core thickness 5mm):

[0046] (1) 25 μm graphite film is used as the raw material paper, and a wave-shaped foldable and stretchable core material is made by a wave folding device;

[0047] (2) The wave-shaped folded core material is compressed and placed in a mold to be pressed and shaped, then liquid silicone rubber is poured, vacuumed to remove bubbles, and cured at 150°C for 30 minutes to obtain a silicone composite material for heat conduction shielding. The composition and weight ratio of the liquid silicone rubber are as follows: 100 parts by weight of 5000mPa·s vinyl-terminated polysiloxane, 2.5 parts by weight of methyl hydrogen polysiloxane crosslinking agent, 0.2 parts by weight of platinum catalyst, 0.1 parts by weight Butynol inhibitor in parts by weight and KH-560 surface treatment agent in 3.0 parts by weight are mixed to form liquid silica gel. The thermal cond...

Embodiment 3

[0049] A preparation method of corrugated silicone graphite / graphene composite material (corrugated paper core thickness 2mm):

[0050] (1) Using a 17 μm graphene film as the raw material paper, a wave-shaped foldable and stretchable core material is made by a wave folding device;

[0051] (2) The wave-shaped folded core material is compressed and placed in a mold to be pressed and shaped, then liquid silicone rubber is poured, vacuumed to remove bubbles, and cured at 150°C for 30 minutes to obtain a silicone composite material for heat conduction shielding. The ingredients and parts by weight ratio of liquid silicone rubber are as follows: 100 parts by weight of 3000mPa·s vinyl-terminated polysiloxane, 3.5 parts by weight of methyl hydrogen polysiloxane crosslinking agent, 0.5 parts by weight of platinum catalyst, 0.1 parts by weight Butynol inhibitor in parts by weight and KH-560 surface treatment agent in 2.0 parts by weight are mixed to form liquid silica gel. The thermal...

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Abstract

A thermally-conductive shielding organosilicon material and a preparation method therefor. Specifically disclosed is a thermally-conductive shielding organosilicon composite film material. The thermally-conductive shielding organosilicon composite film material comprises a thermally-conductive flexible material; the thermally-conductive flexible material comprises a graphite film core material and / or a graphene film core material; the graphite film or graphene film core material is a wave-shaped or corrugation-shaped graphite film or graphene film, and the graphite film or graphene film is parallel to the extension direction of the composite film material; preferably, the thermally-conductive flexible material is a liquid silicone rubber; more preferably, the liquid silicone rubber is prepared from poly(vinylsiloxane), a crosslinking agent, a catalyst, an inhibitor, and a surface treatment agent. In the present invention, the preparation method is simple, the materials are easy to obtain, and excellent thermally-conductive and shielding effects are obtained.

Description

technical field [0001] The invention relates to the field of organic silicon materials, in particular to a heat-conducting and shielding multifunctional organic silicon material and a preparation method thereof. Background technique [0002] The fifth-generation mobile communication (5G) is a new generation of mobile communication system oriented to the needs of the information society in 2020. It has the characteristics of high spectrum utilization, large data flow, low network energy consumption, high reliability and short delay. , unmanned driving, telemedicine, artificial intelligence and other new-generation information technology application innovation foundation. The breakthrough of 5G communication technology and the expansion of application scenarios will promote the revolutionary development of smart terminals and bring new opportunities to the development of multifunctional polymer composite materials industry. With the continuous development of intelligent termi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05C08K13/02C08K3/04
CPCC08L83/04C08L2205/025C08K13/02C08K3/04C08K3/042
Inventor 张保坦孙蓉朱朋莉
Owner SHENZHEN INST OF ADVANCED TECH
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