A novel route for tethering graphene with iron oxide and its magnetic field alignment in polymer nanocomposites

Wu, Shuying, Zhang, Jin, Ladani, Raj B., Ghorbani, Kamran, Mouritz, Adrian P., Kinloch, Anthony J. and Wang, Chun H. 2016, A novel route for tethering graphene with iron oxide and its magnetic field alignment in polymer nanocomposites, Polymer, vol. 97, pp. 273-284, doi: 10.1016/j.polymer.2016.05.024.

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Title A novel route for tethering graphene with iron oxide and its magnetic field alignment in polymer nanocomposites
Author(s) Wu, Shuying
Zhang, JinORCID iD for Zhang, Jin orcid.org/0000-0002-4257-8148
Ladani, Raj B.
Ghorbani, Kamran
Mouritz, Adrian P.
Kinloch, Anthony J.
Wang, Chun H.
Journal name Polymer
Volume number 97
Start page 273
End page 284
Total pages 1234
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-08-05
ISSN 0032-3861
Summary We present a new route of tethering graphene nanoplatelets (GNPs) with Fe3O4 nanoparticles to enable their alignment in an epoxy using a weak magnetic field. The GNPs are first stabilised in water using polyvinylpyrrolidone (PVP) and Fe3O4 nanoparticles are then attached via co-precipitation. The resultant Fe3O4/PVP-GNPs nanohybrids are superparamagnetic and can be aligned in an epoxy resin, before gelation, by applying a weak magnetic field as low as 0.009 T. A theoretical model describing the alignment process is presented and used to quantify the effects of key parameters on the time needed for the alignment process. Compared to the unmodified epoxy, the resulting epoxy polymer nanocomposites containing randomly-oriented Fe3O4/PVP-GNPs nanohybrids exhibit significantly improved electrical conductivities by up to three orders of magnitude and fracture energies by up to 300%. The alignment of the Fe3O4/PVP-GNPs nanohybrids in the epoxy polymer nanocomposites transverse to the direction of crack propagation further increased the fracture energy by 50%, and the electrical conductivity by seven fold in the alignment direction, compared to the nanocomposites containing randomly-oriented nanohybrids.
Language eng
DOI 10.1016/j.polymer.2016.05.024
Field of Research 091202 Composite and Hybrid Materials
Socio Economic Objective 861301 Aerospace Equipment
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30083437

Document type: Journal Article
Collection: Institute for Frontier Materials
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