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4. Mechanical reinforcement and thermal conductivity in expanded graphene nanoplatelets reinforced epoxy composites

Author

Chatterjee, Sanjukta, Wang, J W, Kuo, W S, Tai, N H, Salzmann, C, Li, W L, Hollertz, R, Nüesch, F A, Chu, B T T, Chatterjee, Sanjukta, Wang, J W, Kuo, W S, Tai, N H, Salzmann, C, Li, W L, Hollertz, R, Nüesch, F A, and Chu, B T T

Abstract

Influence of reinforcements on mechanical and thermal properties of graphene nanoplatelets/epoxy com-posites is investigated. Amine functionalized expanded graphene nanoplatelets (EGNPs) were dispersed within epoxy resins using high-pressure processor followed by three roll milling. Functionality on the EGNPs was confirmed with FTIR and micro-Raman spectroscopy. Bending and nano-mechanical testingwas performed on the composites. Incorporation of EGNPs improved the flexural modulus and hardness of the composite and increased fracture toughness by up to 60%. Marked improvement was observed inthermal conductivity of the composites reaching 36% at 2 wt.% loading. Functionalized EGNPs exhibited significant improvements indicating favorable interaction at EGNPs/polymer interface.

Published
2012
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