Fracture toughness and electrical conductivity of epoxy composites filled with carbon nanotubes and spherical particles |
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| Affiliation: | 1. Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, China;2. Chongqing Polycomp International Corporation, Chongqing 400082, China;1. Department of Mechanical Engineering, National Institute of Technology Silchar, Silchar 788010, Assam, India;2. Department of Physics, University of Petroleum & Energy Studies, Dehradun, Uttarakhand 248007, India;1. Central Institute of Plastics Engineering & Technology (CIPET), Chennai, Tamil Nadu, India;2. Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), Bhubaneswar, Odisha, India;1. Sir Lawrence Wackett Aerospace Research Centre, School of Aerospace, Mechanical & Manufacturing Engineering, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia;2. Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK;3. Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, VIC 3220, Australia;1. Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore;2. Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, 117602, Singapore;3. School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, People''s Republic of China |
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| Abstract: | The attainment of both high toughness and superior electrical conductivity of epoxy composites is a crucial requirement in some engineering applications. Herein, we developed a strategy to improve these performances of epoxy by combining the multi-wall carbon nanotubes (MWCNTs) and spherical particles. Two different types of spherical particles i.e. soft submicron-rubber and rigid nano-silica particles were chosen to modify the epoxy/MWCNT composites. Compared with the binary composites with single-phase particles, the ternary composites with MWCNTs and spherical particles offer a good balance in glass transition temperature, electrical conductivity, stiffness and strength, as well as fracture toughness, exhibiting capacities in tailoring the electrical and mechanical properties of epoxy composites. Based on the fracture surface analysis, the complicated interactions between multiscale particles and the relative toughening mechanisms were evaluated to explain the enhancement in fracture toughness of the ternary composites. |
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