Graphene based silicone thermal greases |
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Authors: | Wei Yu Huaqing Xie Lifei Chen Zhigang Zhu Junchang Zhao Zhenhai Zhang |
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Institution: | 1. School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China;2. Shanghai Yueda New Materials Science and Technology Ltd., Shanghai 201209, China;3. School of Mechatronics Engineering, Beijing Institute of Technology, Beijing 100081, China |
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Abstract: | Two kinds of silicone grease containing graphene nanoplatelets or reduced graphene oxide were prepared, and their thermophysical properties have been investigated. When the volume fraction was 1%, the reduced graphene oxide was the most effective additive to enhance the heat transfer properties of silicone, and graphene nanoplatelet was slightly inferior to the former. While when the concentration was enhanced, the viscosity of silicone grease containing reduced graphene oxide became very large due to its rich pore structure. Graphene nanoplatelet was efficient for the thermal conductivity enhancement of silicone grease, and it provided a thermal conductivity enhancement was up to 668% (loading of 4.25 vol.%). The experimental result is in excellent agreement with the recently developed theoretical model analyzing the thermal conductivity of isotropic composites containing randomly embedded GNPs, and it validates that graphene is an effective thermally conducting filler to let grease have high thermal conductivity with low filler content. |
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Keywords: | Graphene Thermal grease Thermal conductivity Silicone |
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