Graphene/thermoplastic polyurethane nanocomposites: Surface modification of graphene through oxidation,polyvinyl pyrrolidone coating and reduction |
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| Affiliation: | 1. Department of Clinical Pharmacy, School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei, 110, Taiwan;2. Department of Green Material Technology, Green Technology Research Institute, CPC Corporation, Kaohsiung 81126, Taiwan;3. Department of Mechanical and Automation Engineering, I-Shou University, Kaohsiung 84001, Taiwan;4. Department of Science Education, National Taipei University of Education, Taipei 106, Taiwan;5. Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan;1. CAS Key Laboratory of Nanosystem and Hierachical Fabrication, National Center for Nanoscience and Technology, China, Beijing, 100190, PR China;2. Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, PR China;3. CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, 230027, PR China;4. University of Chinese Academy of Science, Beijing, 100049, PR China;1. Faculty of Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, Hubei 430074, PR China;2. State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China;3. School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China;4. School of Architecture and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Ma’anshan, Anhui 243002, PR China;6. School of Medicine, Chang Gung University, Guishan, Taoyuan, 333, Taiwan |
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| Abstract: | Herein, oxidation, polyvinyl pyrrolidone (PVP) coating and reduction are used to modify the surface of graphene in thermoplastic polyurethane (TPU)/graphene nanocomposites. It is demonstrated that graphene could be easily dispersed in TPU with PVP absorbed on reduced graphene oxide (RGO) as stabilizer during reduction. In the stress–strain curves for these composites containing GO, PVP coated GO (GO/PVP) and reduced GO/PVP (RGO/PVP) as filler, PVP coating and reduction can largely enhance the stress in low modulus region. It is thought to largely related with enhanced interfacial interaction between filler and matrix and healing of graphene structure during reduction. Consequently, the modulus of TPU/GO/PVP and TPU/RGO/PVP is significantly increased. Meanwhile, an electrical percolation threshold of 0.35 wt.% is obtained for TPU/RGO/PVP. Comparing with the results in literature, the filler surface modification used in this study has created nanocomposites with a good balance between electrical conductivity and mechanical properties. |
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| Keywords: | A Polymer–matrix composites (PMCs) B Mechanical properties B Electrical properties E Surface treatment |
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