Enhanced conductivity behavior of polydimethylsiloxane (PDMS) hybrid composites containing exfoliated graphite nanoplatelets and carbon nanotubes |
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| Affiliation: | 1. School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia;2. Department of Materials, Queen Mary University of London, London E1 4NS, UK;1. Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, School of Materials Science and Engineering, Henan Key Laboratory of Advanced Nylon Materials and Application (Zhengzhou University), Zhengzhou University, Zhengzhou, Henan 450001, PR China;2. Technology Development Center for Polymer Processing Engineering, Guangdong Colleges and Universities, Guangdong Industry Technical College, Guangzhou 510641, PR China;1. School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia;2. Computer, Electrical, Mathematical, Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Saudi Arabia;1. Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece;2. Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, 03164 Kiev, Ukraine;3. Faculty of Chemistry, Maria Curie–Sk?odowska University, Maria Curie–Sk?odowskiej Sq. 3, 20–031 Lublin, Poland;1. School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin, 300072, PR China;2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Composite and Functional Materials, Tianjin, 300072, PR China;3. Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin, 300072, PR China |
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| Abstract: | Polydimethylsiloxane (PDMS) hybrid composites consisting of exfoliated graphite nanoplatelets (xGnPs) and multiwalled carbon nanotubes functionalized with hydroxyl groups (MWCNTs-OH) were fabricated, and the effects of the xGnP/MWCNT-OH ratio on the thermal, electrical, and mechanical properties of polydimethylsiloxane (PDMS) hybrid composites were investigated. With the total filler content fixed at 4 wt%, a hybrid composite consisting of 75% × GnP/25% MWCNT-OH showed the highest thermal conductivity (0.392 W/m K) and electrical conductivity (1.24 × 10?3 S/m), which significantly exceeded the values shown by either of the respective single filler composites. The increased thermal and electrical conductivity found when both fillers are used in combination is attributed to the synergistic effect between the fillers that forms an interconnected hybrid network. In contrast, the various different combinations of the fillers only showed a modest effect on the mechanical behavior, thermal stability, and thermal expansion of the PDMS composite. |
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| Keywords: | B Mechanical properties B Thermal properties B Electrical properties |
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