| 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 biocomposites by supercritical CO2 assisted extrusion process
Abstract
In many industrial fields, the development of porous and lightweight polymer composite structures is of great interest. These structures may have several advantages compared to a massive solid of similar chemical nature, such as better mechanical properties, cushioning, insulation or sound and heat absorption. Three different methods are developed for the foaming of materials: batch, injection and extrusion foaming. These techniques employ highly toxic and harmful substances such as azodicarbonamide as blowing agents, which has increased the use of supercritical fluids as blowing agents, sc-CO2 being the most employed. In addition, petroleum-based thermoplastics are widely used as polymer matrices, but, due to the shortage of fossil resources and the rise of environmental concerns, biopolymers (bio-based and/or bio-degradable, polymers) are more and more used. In this context, the foaming of biopolymers using supercritical CO2 as a blowing agent has become a subject of interest. For this work, polylactic acid (PLA) is employed as the polymer matrix. PLA’s interesting properties have made it the most studied biopolymer, and consequently generated a great amount of interest in different industrial fields. The foaming of PLA biocomposites has been investigated before [1-2], but the effect of fillers on the cellular morphology remains a misunderstood and poorly studied subject. This work aims to explain the effects of size and aspect ratio of a filler as well as its content on the characteristics of PLA foams obtained by supercritical CO2-assisted extrusion process. Short (S) and long (L) cellulose fibres with aspect ratios (lenght/diameter) of 1.5 and 5-7 respectively, have been used as fillers. Fibres were compounded with the polymer through hot melt extrusion at different volume fractions (4 and 12 vol.%) (mass fractions 5 and 15 wt.% respectively). During the extrusion foaming process, two different volumetric flow rates of CO2 were studied (2.5 and 3 mL min-1), and the effect of die temperature was evaluated as well. Techniques as gas pycnometry, scanning electron microscopy (SEM) and modulated differential scanning calorimetry (MDSC) have been used to identify the characteristics of the produced foams.