Microcellular Foaming of (Nano)Biocomposites by Continuous Extrusion Assisted by Supercritical CO2

Nicolas Lemoigne 1 Martial Sauceau 2 Margot Chauvet 2 Jean Charles Benezet 1 Jacques Fages 2
1 C2MA - Centre des Matériaux des Mines d'Alès
2 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement
Abstract : In many industrial fields, the development of porous and light polymer composite structures is of great interest. Continuous extrusion assisted by supercritical carbon dioxide (sc-CO2) is an emerging technology for the microcellular foaming of polymer and composite materials. Thanks to its specific physical properties, sc-CO2 can act as a removable plasticizer and physical blowing agent during processing. Unlike chemical foaming processes, sc-CO2 assisted extrusion avoids leaving residues in the final products. It also allows a rapid mixing and dissolution of sc-CO2 in the polymer melt as compared to batch processes. In this chapter, the foaming of biopolymer matrices by sc-CO2 assisted extrusion is reviewed and extended to the development of (nano)biocomposites foams loaded with micro/nano-sized (in)organic fillers.
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Nicolas Lemoigne, Martial Sauceau, Margot Chauvet, Jean Charles Benezet, Jacques Fages. Microcellular Foaming of (Nano)Biocomposites by Continuous Extrusion Assisted by Supercritical CO2. Biomass Extrusion and Reaction Technologies: Principles to Practices and Future Potential, ACS Publications, pp 171-188, 2018, ACS Symposium Series, 9780841233713. ⟨10.1021/bk-2018-1304.ch009⟩. ⟨hal-01869583⟩

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