Enhanced thermal conductivity and retained electrical insulation for polyimide composites with SiC nanowires grown on graphene hybrid fillers |
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| Affiliation: | 1. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;2. Advanced Nano-processing Engineering Lab, Mechanical Systems Engineering, Kogakuin University, Tokyo 192-0015, Japan;1. Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, International Center for Dielectric Research, Xi''an Jiaotong University, Xi''an 710049, China;2. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;3. School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2. Shanghai Innovation Institute for Materials, Shanghai 200444, China;1. Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China;2. University of Chinese Academy of Sciences, Beijing 100039, PR China;1. School of Electrical Engineering, Shandong University, Ji’nan 250061, People’s Republic of China;2. State Grid Ji’nan Power Supply Company, Ji’nan 250010, People’s Republic of China |
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| Abstract: | Polyimide (PI) composites containing one-dimensional SiC nanowires grown on two-dimensional graphene sheets (1D–2D SiCNWs-GSs) hybrid fillers were successfully prepared. The PI/SiCNWs-GSs composites synchronously exhibited high thermal conductivity and retained electrical insulation. Moreover, the heat conducting properties of PI/SiCNWs-GSs films present well reproducibility within the temperature range from 25 to 175 °C. The maximum value of thermal conductivity of PI composite is 0.577 W/mK with 7 wt% fillers loading, increased by 138% in comparison with that of the neat PI. The 1D SiC nanowires grown on the GSs surface prevent the GSs contacting with each other in the PI matrix to retain electrical insulation of PI composites. In addition, the storage modulus and Young’s modulus of PI composites are remarkably improved in comparison with that of the neat PI. |
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| Keywords: | A Hybrid A Polymer-matrix composites (PMCs) B Thermal properties B Electrical properties |
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