Interfacial structures and mechanisms for strengthening and enhanced conductivity of graphene/epoxy nanocomposites

W. Zheng, W. G. Chen, Q. Zhao, S. X. Ren, Y. Q. Fu

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)
2 Downloads (Pure)

Abstract

Graphene/epoxy resin nanocomposites were prepared using an in-situ polymerization process, and their formation mechanisms, microstructures, mechanical properties and electrical conductivity were characterized. Results showed that graphene is well dispersed in the epoxy matrix, and covalent cross-links are formed between graphene and epoxy matrix. Tensile strength and modulus of the graphene/epoxy composites were found to increase firstly and then decrease with the increase of graphene loading contents. When the graphene content was 0.3 wt%, tensile strength, tensile modulus and elongation were found to increase by 46.8%, 47.3% and 24.0% compared with those of pure epoxy resin. When the graphene content was 1.38 vol%, the conductivity of the composite was 3.28 × 10−4 S m−1 with a low percolation threshold of 0.47 vol%. Enhancement mechanisms for the properties of composites were identified to be dispersion strengthening, effective transfer of stress and bridging of graphene.
Original languageEnglish
Pages (from-to)171-177
Number of pages7
JournalPolymer
Volume163
Early online date4 Jan 2019
DOIs
Publication statusPublished - 1 Feb 2019

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