| 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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Moigne, Nicolas Le
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2024Sorption of water and ethanol pure vapours and vapour mixtures by four hardwoodscitations
- 2023Flax Shives As Fillers For Injection Molded Bio-Based Composites
- 2023Effect Of Processing On Particle Dispersion And Rheological Behaviour Of Cnc Reinforced Polyvinyl Alcohol Nanocomposites
- 2023Foaming of PLA biocomposites by supercritical CO2 assisted extrusion process
- 2023Tracking the changes into mechanical properties and ultrastructure of flax cell walls during a dynamic heating treatment
- 2023Advances in the Production of Cellulose Nanomaterials and Their Use in Engineering (Bio)Plasticscitations
- 2023In-Situ Monitoring Of The Ultrastructure And Mechanical Properties Of Flax Cell Walls During Controlled Heat Treatment
- 2022Agrobranche Project: Towards sustainable wood fillers from agroforestry for WPC
- 2022Revealing the potential of Guianese waste fibers from timber production and clearings for the development of local and bio-based insulation fiberboards.
- 2022Développement et fonctionnalisation d’anas de lin pour l’élaboration de biocomposites thermoplastiques injectables
- 2021Hierarchical thermoplastic biocomposites reinforced with flax fibres modified by xyloglucan and cellulose nanocrystalscitations
- 2021Experimental assessment of low velocity impact damage in flax fabrics reinforced biocomposites by coupled high-speed imaging and DIC analysiscitations
- 2021PLA-based biocomposites foaming by supercritical CO2 assisted batch process
- 2021Swelling and Softening Behaviour of Natural Fibre Bundles under Hygro- and Hydrothermal Conditions
- 2021Towards Sustainable Wood Fillers from Agroforestry for Wood-Plastic Composites : Effect of Filler Size and Wood Species
- 2021Foaming of PLA-based Biocomposites by Supercritical CO2 Assisted Batch Process : Effect of Processing and Cellulose Fibres on Foam Microstructure
- 2020Fonctionnalisation d’un tissu de lin industriel par adsorption de polysaccharides: effets sur les propriétés physiques des fibres de lin et des biocomposites lin/epoxy
- 2020Thermal and dynamic mechanical characterization of miscanthus stem fragments: Effects of genotypes, positions along the stem and their relation with biochemical and structural characteristicscitations
- 2018Dimensional variations and mechanical behaviour of natural fibres from various plant species in controlled hygro/hydrothermal conditions
- 2018Dry fractionation of olive pomace for the development of food packaging biocompositescitations
- 2017Low velocity impact damage assessment in natural fibre biocomposites
- 2016EXPERIMENTAL CHARACTERISATION OF THE IMPACT RESISTANCE OF FLAX FIBRE REINFORCED COMPOSITE LAMINATES
- 2015Influence of flax cell wall components on the interfacial behavior of flax woven fabric/epoxy biocomposites
- 2015Influence of the flax fibre chemical composition on mechanical properties of epoxy biocomposite
Places of action
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document
Foaming of PLA-based Biocomposites by Supercritical CO2 Assisted Batch Process : Effect of Processing and Cellulose Fibres on Foam Microstructure
Abstract
In many industrial fields, the development of porous and light polymer composite structures is of great interest because of their several advantages compared to a massive solid of the same chemical nature. Batch foaming of polymers is a discontinuous process carried out normally in an autoclave. The samples are saturated in a pressurised vessel, andtheir foaming is achieved by inducing an instability into the system. Gas solubility in polymers increases with pressure but decreases with temperature. Therefore, in the batch foaming process, the instability can be induced by a sudden drop in pressure (pressure quenching) or by a raise in temperature thus causing polymer foaming1.Pressure quenching is largely used for its ease of implementation. This foaming technology has been used for different polymers including PLA-based composites. Silk, cellulose1, jute, and wood flour have been studied as fillers in PLA foams. The operating conditions have a great influence on final foam morphology, as well as fillers nature and content. In general, fillers enhance the crystallization kinetics and PLA melt strength. Foams with reduced cell size and expansion ratio and increased cell density can be obtained compared to pure PLA foams2.This work is intended to explain the effects of size and aspect ratio of fibres as well as its content, on the characteristics of PLA foams obtained by supercritical CO2-assisted batch process by pressure quenching, which have not been studied until today.Cellulose fibres (Rettenmaier France) of different aspect ratios were compounded with PLA by extrusion and, then injected in discs, to be analysed and foamed afterwards. A complete characterisation of the crystallisation phenomenon of composites through isothermal and non-isothermal DSC, microscopic and rheological studies have been made in order to understand the effect of fibre characteristics on the solidification and crystallisation phenomena. The initial fibres size and aspect ratio and the ones within the composites have been evaluated through image analysis; in the case of the fibres embedded in thecomposites, an extraction process was necessary.Temperatures going from 100 °C to 140 °C have been employed at a CO2 pressure of 15 MPa, firstly for pure PLA foaming, in order to determine the most appropriate operating conditions for the composites. An analysis of fibre effects on foam morphology, crystallinity, and foaming temperature is ongoing. Figure 1 shows first foams of pure PLA obtained atdifferent temperatures.Understanding the role of the filler size and aspect ratio, as well as the effect of supercritical CO2 and operating conditions on cell morphology of a composite foam, will allow to control its microstructure and therefore its characteristics.