A silicone rubber high thermal conductivity material

Abstract

The invention relates to the technical field of thermally conductive silicone rubber, in particular to a silicone rubber material with high thermal conductivity. The thermal conductivity of silicone rubber is the same as that of most polymers. The thermal conductivity is poor, and the thermal conductivity is only 0.2w / m·k. Graphene is simply dispersed into the silicone rubber material system. The compatibility of graphene and silicone rubber is not Too good, and the graphene particles are easy to agglomerate, which is very unfavorable for improving the thermal conductivity of silicone rubber. Based on the above problems, the present invention provides a silicone rubber material with high thermal conductivity, which uses a special titanate coupling agent to connect graphene and graphite to form a larger heat conduction network, and adds graphene or graphite and silicone rubber material The compatibility between them reduces the probability of agglomeration of graphene or graphite particles themselves. In the present invention, spherical alumina and tetrapod zinc oxide with different particle sizes are added to the silicone rubber system, and the thermally conductive fillers work synergistically. Greatly improved the thermal conductivity of the silicone rubber material.

Description

technical field [0001] The invention relates to the technical field of thermally conductive silicone rubber, in particular to a silicone rubber material with high thermal conductivity. Background technique [0002] With the development of modern electronics industry, information industry and high-tech, especially with the miniaturization, densification, and power increase of microelectronic devices, the problem of heat dissipation of devices has become increasingly important. In order to meet the higher and higher requirements, it is hoped to obtain materials with good thermal conductivity to meet actual needs. Thermally conductive silicone rubber has excellent characteristics of high and low temperature resistance, aging resistance, and chemical corrosion resistance. However, the thermal conductivity of silicone rubber is the same as that of most polymers, and its thermal conductivity is poor, with a thermal conductivity of only 0.2w / m·k. To endow silicone rubber with exce...

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Problems solved by technology

[0004] For the problems existing in the prior art, the technical problem to be solved in the present invention is: the thermal conductivity of silicone rubber is the same as that of most polymers, the thermal conductivity is relatively poor, and the thermal conductivity is only 0.2w / m k. Dispersed into the silicone rubber material system, the compatibility between graphene and silicone rubber is not very good, and graphene particles are easy to agglomerate, which is very unfavorable for improving the thermal conductivity of silicone rubber

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