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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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Lalire, Thibaut
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Publications (7/7 displayed)
- 2024Electrical properties of graphene/multiphase polymer nanocomposites: A reviewcitations
- 2023Chemical modification strategies for the control of graphene localization in PS/PMMA blendcitations
- 2022Correlation between multiple chemical modification strategies on graphene or graphite and physical / electrical propertiescitations
- 2022Effect of modified graphene localization in PMMA/PS nanocomposites on electrical properties
- 2021Graphene and graphite chemical modifications to perform electrical conductive polymer nanocomposites
- 2021Control of graphene localization in co-continuous PMMA/PS polymer blends via chemical modification for electrical application
- 2021Chemical modification impact of graphene or graphite in conductive nanocomposite morphology control
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document
Graphene and graphite chemical modifications to perform electrical conductive polymer nanocomposites
Abstract
The last decade, graphene attracted much attention thanks to its 2D structure, high aspect ratio and high surface area. These intrinsic properties made it one of the most promising filler forthedevelopmentofhighadded-valuepolymer nanocomposites[1],[2].However, graphene nanoparticles are difficult to disperse in polymer matrices. Chemical modification is one of the solutions to improve the dispersion of graphene in polymers. The aim of our study istotunethechemicalmodificationtoimprovegrapheneorgraphitedispersionwhile achieving a high electrical conductive polymer nanocomposite.The chemical modification used is a versatile method based on « grafting onto » functionalization with a previously synthesized copolymer. This functionalization is performed inseveralsteps:(1)oxidationviaHummersornitricacidattack,(2)“graftingonto”ofa copolymer (P(MMA-co-HEMA)) and (3) reduction to recover the high electrical conductivity.The present study is focusing on the characterization of the graphene and graphite chemical modification.Ramanspectroscopyrevealshighdefectconcentrationduetothestrong oxidationandformationofsp3bonds. XRDallowstoshowthestructuremodification (intercalation or exfoliation of the platelets). AFM and SEM allowed to show the exfoliation andthereductioncanbequantifybycouplingEDXwithSEM.TGA,FTIRandPy-GC/MS characterizations proves the chemical modification and the amount of grafted copolymer.Finally,electricalmeasurementsonpowderswerecarriedouttodeterminetheimpactof chemical modifications on electrical properties.