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| Naji, M. |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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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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| 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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Fages, Jacques
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Topics
Publications (19/19 displayed)
- 2023Foaming of PLA biocomposites by supercritical CO2 assisted extrusion process
- 2023Foaming of PLA biocomposites by supercritical CO2 assisted extrusion process
- 2021PLA-based biocomposites foaming by supercritical CO2 assisted batch process
- 2021PLA-based biocomposites foaming by supercritical CO2 assisted batch process
- 2021Blending and foaming thermoplastic starch with poly (lactic acid) by CO 2 ‐aided hot melt extrusioncitations
- 2021Foaming of PLA-based Biocomposites by Supercritical CO2 Assisted Batch Process : Effect of Processing and Cellulose Fibres on Foam Microstructure
- 2021Foaming of PLA-based Biocomposites by Supercritical CO2 Assisted Batch Process : Effect of Processing and Cellulose Fibres on Foam Microstructure
- 2017Modelling Nucleation and Cell Size During the Continuous Process of Extrusion Assisted by Supercritical CO 2
- 2016Characterisation of natural fibre reinforced PLA foams prepared by supercritical CO 2 assisted extrusioncitations
- 2012Use of supercritical CO2-aided and conventional melt extrusion for enhancing the dissolution rate of an active pharmaceutical ingredientcitations
- 2011On-line rheological measurement of a binary mixture polymer/sc-CO2 in an extruder
- 2011New challenges in polymer foaming: A review of extrusion processes assisted by supercritical carbon dioxidecitations
- 2010Biosourced polymer foam production using a (SC CO2) -assisted extrusion process
- 2008A new supercritical co-injection process to coat microparticlescitations
- 2008Application of the Markov chain theory for modelling residence time distribution in a single screw extruder
- 2007Microencapsulation by a solvent-free supercritical fluid process : use of density, calorimetric, and size analysis to quantify and qualify the coatingcitations
- 2004A new test for cleaning efficiency assessment of cleaners for hard surfacescitations
- 2004Supercritical carbon dioxide : an efficient tool for the production of ultra-fine particles for the food and pharmaceutical industries
- 2002Extraction and precipitation particle coating using supercritical CO2citations
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document
PLA-based biocomposites foaming by supercritical CO2 assisted batch process
Abstract
In many industrial fields, the development of porous and light polymer composite structure is of great interest. These structures may have several advantages compared to a massive solid of the same chemical nature, such as better mechanical properties, cushioning, insulation, sound and heat absorption. As an example, foams are used in the sport, pharmaceutical, aeronautic and packaging industries. For these applications, petroleum based thermoplastics are widely used as polymer matrix, but, due to the shortage of fossil resources and the rise of environmental concerns, biopolymers (bio-based, bio-degradable and/or bio-compatible polymer) are more and more used.There are two main routes to produce biopolymer foams depending on the blowing agent used, which can be either chemical (CBA) or physical (PBA). CBA are able to release a gas upon thermal decomposition, but they have some drawbacks, among which the necessity of high process temperatures, the solid residues on the foam and their toxicity. PBA appear as an alternative to these chemical agents, supercritical CO2 and N2 being the most used.Batch foaming of polymers is a process which can be carried out in an autoclave. The samples are saturated in a pressure vessel a certain time, and their foaming is achieved by inducing an instability into the system. Pressurised 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 foaming.This foaming technology has been largely used for different polymers such as polystyrene [2], polycaprolactone [3], polyethylene/polypropylene [4] and, polyethylene terephthalate [5]; among others. This work is focused on the foaming of PLA-based biocomposites using (ligno-)cellulosic fibres by supercritical CO2 assisted batch process by pressure quenching, the study of the operating conditions, the influence of the nature of the fibres and their characteristics on the porosity and morphology of the obtained foams.