| People | Locations | Statistics |
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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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Mija, Alice
Université Côte d'Azur
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2023Sustainable Composites from Nature to Construction: Hemp and Linseed Reinforced Biocomposites Based on Bio-Based Epoxy Resinscitations
- 2021Reprocessable humins thermosets and compositescitations
- 2021Hydrothermal Carbon as Reactive Fillers to Produce Sustainable Biocomposites with Aromatic Bio-Based Epoxy Resinscitations
- 2021Biobased furan-based epoxy/TiO2 nanocomposites for the preparation of coatings with improved chemical resistancecitations
- 2020Sustainable Series of New Epoxidized Vegetable Oil-Based Thermosets with Chemical Recycling Propertiescitations
- 2020Thermal and dynamic mechanical characterization of miscanthus stem fragments: Effects of genotypes, positions along the stem and their relation with biochemical and structural characteristicscitations
- 2019Self-organization of sepiolite fibbers in a biobased thermosetcitations
- 2017Structure and properties of polypropylene/graphene nanoplatelets microcomposites: effect of graphene size.
- 2017Structural, thermal, rheological and mechanical properties of polypropylene/graphene nanoplatelets composites: Effect of particle size and melt mixing conditionscitations
- 2017Preparation of polypropylene nanocomposites by melt-mixing: Comparison between three organoclayscitations
- 2017Preparation of polypropylene nanocomposites by melt-mixing: Comparison between three organoclayscitations
Places of action
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conferencepaper
Structure and properties of polypropylene/graphene nanoplatelets microcomposites: effect of graphene size.
Abstract
The aim of this work is to assess the potential of graphene nanoplatelets (GNP) according to their production method to improve properties of composites based on polypropylene and elaborated by melt mixing. The effects of GNP size on structural, thermal, rheological and mechanical properties of composites were investigated. Three grades of GNPs, obtained by a thermomechanical process and commercialized by Knano under KNG-180, KNG-150 and KNG-G5 references, were considered in this work. KNG-180 and KNG-150 GNPs were obtained from graphite through a three step process: i) graphite was intercalated by sulfuric acid under stirring and then washed and dried, ii) then, it underwent a thermal treatment and finally iii) the obtained expanded graphite was ultrasonicated in hydroalcoholic solution. From this step, particles were considered as graphene nanoplatelets [1]. An additional ball milling process in good solvent, followed by centrifugation, enabled to obtain thinner KNG-G5 from KNG-180 [2]. Composites were elaborated by melt mixing in an internal mixer using different conditions and thus mixing energies. The dispersion state of the composites was evaluated at different scales using SEM, TEM and X-ray diffraction. Thermal, rheological and mechanical properties of the composites were investigated. Although mechanical delamination followed by centrifugation enables to improve dispersion state of GNP in thermoplastics, PP/GNP mixtures have to be considered as non-exfoliated microcomposites. Even if, different mixing conditions were investigated, they did not affect the dispersion state. However, thermal, rheological and mechanical properties of PP/KNG-G5 composites were outstandingly close to those of thermoplastic/montmorillonite or reduced graphene nanocomposites and show positive results regarding the use of this graphene manufacturing process without chemical treatment. Ackowledgements GNPs were kindly provided by the CNRS research group project n°3661 "GDR PolyNano". References 1 G. Chen, C. Wu, W. Weng, D. Wu, W. Yan, Preparation of polystyrene/graphite nanosheet composite, Polymer. 44, 1781 (2003) 2 W. Zhao, M. Fang, F. Wu, H. Wu, L. Wang, G. Chen, Preparation of graphene by exfoliation of graphite using wet ball milling, J. Mater. Chem. 20, 5817 (2010)