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dc.contributor.authorHo, Quang Binhen
dc.contributor.authorOsazuwa, Osayukien
dc.contributor.authorModler, Rebeccaen
dc.contributor.authorDaymond, Marken
dc.contributor.authorGallerneault, Mark T.en
dc.contributor.authorKontopoulou, Mariannaen
dc.descriptionFinal publication is available at:
dc.description.abstractHigh performance composites based on a thermoplastic polyamide matrix containing well dispersed graphene nanoplatelets are prepared, by delaminating expanded graphite (EG) into its constituent graphene nanoplatelet (GNP) layers, by melt compounding. Results from scanning electron microscopy, transmission electron microscopy, and 3D tomography showed good dispersion of the GNP, while contact angle measurements reveal that the polyamide and graphene-based constituents have excellent interfacial interactions. Compared to flake graphite, exfoliation of EG into graphene nanoplatelets substantially improved the electrical, thermal and mechanical properties at low filler volume fractions: the electrical percolation threshold was attained at 1.9 vol%, the thermal conductivity increased by 1300% at 8 vol%, and the flexural modulus by 270% at 15 vol%. Substantial improvements in the impact properties of the composites were imparted by adding a maleated elastomeric impact modifier, which was well-dispersed within the PA matrix, resulting in excellent toughening performance. This research achieves composites with superior properties, using an industrially relevant, easy to implement melt compounding method.en
dc.description.sponsorshipGrafoid Inc.en
dc.subjectExpanded graphiteen
dc.subjectGraphene nanoplateletsen
dc.subjectMelt compoundingen
dc.titleExfoliation of graphite and expanded graphite by melt compounding to prepare reinforced, thermally and electrically conducting polyamide compositesen
dc.typejournal articleen

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