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

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Title: A novel route for tethering graphene with iron oxide and its magnetic field alignment in polymer nanocomposites
Authors: Kinloch, AJ
Zhang, J
Ladani, RB
Ghorbani, K
Mouritz, AP
Chun, CH
Item Type: Journal Article
Abstract: We present a new route for 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 poly(vinylpyrrolidone) (PVP) and Fe3O4 nanoparticles are then attached via coprecipitation. 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. The resulting nanocomposites exhibit anisotropic properties with significantly improved electrical conductivities (three orders of magnitude) in the alignment direction and dramatically increased fracture energy (about 530%) when the nanohybrids are aligned transverse to the crack growth direction, compared with the unmodified epoxy. Compared with the randomly-oriented nanocomposites, these aligned nanocomposites show approximately 50% increase in toughness transverse to the alignment direction and a seven-fold increase in electrical conductivity in the alignment direction.
Issue Date: 12-May-2016
Date of Acceptance: 6-May-2016
URI: http://hdl.handle.net/10044/1/32309
DOI: https://dx.doi.org/10.1016/j.polymer.2016.05.024
ISSN: 0032-3861
Publisher: Elsevier
Start Page: 273
End Page: 284
Journal / Book Title: Polymer
Volume: 97
Copyright Statement: © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Physical Sciences
Polymer Science
Fe3O4/PVP-GNPs
Magnetic field alignment
Epoxy nanocomposites
Fracture toughness
Electrical conductivity
LITHIUM-ION BATTERIES
CARBON NANOTUBES
EPOXY NANOCOMPOSITES
MULTIFUNCTIONAL PROPERTIES
FE3O4 NANOPARTICLES
ELECTRICAL-CONDUCTIVITY
MECHANICAL-PROPERTIES
THERMAL CONDUCTION
COMPOSITES
FRACTURE
Polymers
03 Chemical Sciences
09 Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Mechanical Engineering



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