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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Zhang, Jin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2024Probing quantum floating phases in Rydberg atom arrayscitations
- 2024Design and 3D Printing of Polyacrylonitrile‐Derived Nanostructured Carbon Architecturescitations
- 2022Soft Liquid Metal Infused Conductive Spongescitations
- 2022Induction heating for the removal of liquid metal-based implant mimics: a proof-of-conceptcitations
- 2020Carbonization of low thermal stability polymers at the interface of liquid metalscitations
- 2020Grain boundary mobilities in polycrystalscitations
- 2018Electrodeposited Ni-Based Magnetic Mesoporous Films as Smart Surfaces for Atomic Layer Deposition: An “All-Chemical” Deposition Approach toward 3D Nanoengineered Composite Layers
- 2018Three-dimensional grain growth in pure iron. Part I. statistics on the grain levelcitations
- 2018Fracture and fatigue behaviour of epoxy nanocomposites containing 1-D and 2-D nanoscale carbon fillerscitations
- 2018Electrodeposited Ni-based magnetic mesoporous films as smart surfaces for atomic layer deposition: an 'all-chemical' deposition approach toward 3D nanoengineered composite layerscitations
- 2017Aligning carbon nanofibres in glass-fibre/epoxy composites to improve interlaminar toughness and crack-detection capabilitycitations
- 2017Using carbon nanofibre Sensors for in-situ detection and monitoring of disbonds in bonded composite jointscitations
- 2017Novel electrically conductive porous PDMS/carbon nanofiber composites for deformable strain sensors and conductorscitations
- 2017Determining material parameters using phase-field simulations and experimentscitations
- 2017Voltage-induced coercivity reduction in nanoporous alloy films : a boost towards energy-efficient magnetic actuationcitations
- 2016A novel route for tethering graphene with iron oxide and its magnetic field alignment in polymer nanocompositescitations
- 2016Multifunctional properties of epoxy nanocomposites reinforced by aligned nanoscale carboncitations
- 2016Efficient perovskite solar cells by metal ion dopingcitations
- 2016Room-temperature synthesis of three-dimensional porous ZnO@CuNi hybrid magnetic layers with photoluminescent and photocatalytic propertiescitations
- 2016Nanocasting synthesis of mesoporous SnO₂ with a tunable ferromagnetic response through Ni loadingcitations
- 2016Nanomechanical behaviour of open-cell nanoporous metals: homogeneous versus thickness-dependent porositycitations
- 2015Aligning multilayer graphene flakes with an external electric field to improve multifunctional properties of epoxy nanocompositescitations
- 2015Epoxy nanocomposites with aligned carbon nanofillers by external electric fields
- 2015Improving the toughness and electrical conductivity of epoxy nanocomposites by using aligned carbon nanofibrescitations
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article
Aligning multilayer graphene flakes with an external electric field to improve multifunctional properties of epoxy nanocomposites
Abstract
<p>The increasing demand for multifunctional polymer nanocomposites calls for new technologies to simultaneously enhance mechanical, electrical, and thermal properties. This paper presents the use of an alternating-current electric field to align graphene nanoplatelets (GnPs) in an epoxy polymer. Theoretical modeling of the alignment process has identified the key parameters that control the rotation and chain-formation of the GnPs. Experimental results reveal that the resulting nanocomposites exhibit anisotropic properties with significantly improved electrical and thermal conductivities in the alignment direction, and dramatically increased fracture toughness when the GnPs are aligned transverse to the crack growth direction. In particular, compared to the unmodified epoxy polymer, the alignment of the GnPs yields up to about 7-8 orders of magnitude improvement in the electrical conductivity, up to approximately 60% increase in the thermal conductivity, and up to a nearly 900% increase in the mode I fracture toughness. The dramatic improvement in the fracture toughness is attributed to multiple intrinsic and extrinsic toughening mechanisms including microcracking, pinning, deflection and branching of the crack, and rupture and pull-out of the GnPs. Such major improvement in the toughness arises from GnPs being transversely aligned to the crack growth direction exhibiting increased interactions with the advancing crack tip.</p>