A new method for preparation of functionalized graphene and its epoxy nanocomposites

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dc.contributor.authorNaeem, M.
dc.contributor.authorKuan, H.C.
dc.contributor.authorMichelmore, A.
dc.contributor.authorMeng, Q.
dc.contributor.authorQiu, A.
dc.contributor.authorAakyiir, M.
dc.contributor.authorLosic, D.
dc.contributor.authorZhu, S.
dc.contributor.authorMa, J.
dc.date.issued2020
dc.description.abstractOrganic solvents are often used to prepare epoxy/graphene nanocomposites. In this study a graphene precursor is developed, which in epoxy at 200 °C is able to directly exfoliate into three classes of graphene platelets: large, single-layer sheets, medium sized sheets with 5.2 ± 1.95 nm in thickness, and smaller 0.5–1.0 nm thick sheets of 200–500 nm in lateral dimension, with a Raman ID/IG ratio of 0.177. The yield of single-layer graphene is 41.45%. Due to oxygen-containing groups on the surface, these sheets are named functionalized graphene platelets. Platelet films of ~10 μm in thickness have an electrical conductivity of 978.65 ± 79.44 S/cm. A percolation threshold of electrical conductivity is observed at 0.80 vol% for epoxy/graphene nanocomposites. The composites show highly improved mechanical and dynamic thermo-mechanical properties. At 1.03 vol%, the nanocomposite has a fracture energy release rate of 850.78 ± 58.00 J m−2 corresponding to an increase of 170.61% over neat epoxy.
dc.description.statementofresponsibilityMohannad Naeem, Hsu-Chiang Kuan, Andrew Michelmore, Qingshi Meng, Aidong Qiu ... Dusan Losic ... et al.
dc.identifier.citationComposites Part B: Engineering, 2020; 196:108096-1-108096-10
dc.identifier.doi10.1016/j.compositesb.2020.108096
dc.identifier.issn1359-8368
dc.identifier.issn1879-1069
dc.identifier.orcidLosic, D. [0000-0002-1930-072X]
dc.identifier.urihttp://hdl.handle.net/2440/126771
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/LP180100005
dc.relation.granthttp://purl.org/au-research/grants/arc/IH150100003
dc.rights© 2020 Elsevier Ltd. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.compositesb.2020.108096
dc.subjectPolymer-matrix composites (PMCs); fracture toughness; solventfree synthesis; multiscale graphene/epoxy nanocomposites
dc.titleA new method for preparation of functionalized graphene and its epoxy nanocomposites
dc.typeJournal article
pubs.publication-statusPublished

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