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Graphene based room temperature flexible nanocomposites from permanently cross-linked networks

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posted on 2018-02-01, 00:00 authored by Nishar Hameed, Ludovic DumeeLudovic Dumee, Francois-Marie Allioux, Mojdeh Reghat, Jeffrey S Church, Minoo NaebeMinoo Naebe, Kevin Magniez, Jyotishkumar Parameswaranpillai, Bronwyn L Fox
Graphene based room temperature flexible nanocomposites were prepared using epoxy thermosets for the first time. Flexible behavior was induced into the epoxy thermosets by introducing charge transfer complexes between functional groups within cross linked epoxy and room temperature ionic liquid ions. The graphene nanoplatelets were found to be highly dispersed in the epoxy matrix due to ionic liquid cation-π interactions. It was observed that incorporation of small amounts of graphene into the epoxy matrix significantly enhanced the mechanical properties of the epoxy. In particular, a 0.6 wt% addition increased the tensile strength and Young's modulus by 125% and 21% respectively. The electrical resistance of nanocomposites was found to be increased with graphene loading indicating the level of self-organization between the ILs and the graphene sheets in the matrix of the composite. The graphene nanocomposites were flexible and behave like ductile thermoplastics at room temperature. This study demonstrates the use of ionic liquid as a compatible agent to induce flexibility in inherently brittle thermoset materials and improve the dispersion of graphene to create high performance nanocomposite materials.

History

Journal

Scientific reports

Volume

8

Article number

2803

Pagination

1 - 8

Publisher

Nature Publishing Group

Location

London, Eng.

eISSN

2045-2322

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2018, The Authors

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