Bio-aerogels: new promising materials for thermal superinsulation

Abstract : Bio-aerogels are a new generation of aerogels made from biomass-based polymers, mainly polysaccharides. We prepared aerogels from cellulose (“Aerocellulose” /1, 2, 3/) and pectin (“Aeropectin” /4/) via polymer dissolution, coagulation and drying with super-critical CO2. Their density varies from 0.05 to 0.2 g/cm3 and specific surface area is around 200-300 m2/g. Bio-aerogels are mechanically strong materials, with Young’s moduli from 1 to 30 MPa and plastic deformation without breakage up to 60-70% strain. The thermal conductivity of Aeropectin is around 0.015 – 0.020 W/(m.K) making it the first thermal super-insulating fully biomass-based aerogel reported. The thermal conductivity of Aerocellulose is rather “high”, around 0.030-0.035 W/(m.K), due to the presence of large macropores. We demonstrate that by using cellulose functionalization and making polymer-silica interpenetrated aerogel network the specific surface area increases to 800-900 m2/g and thermal conductivity decreases below that of the air.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01158588
Contributeur : Magalie Prudon <>
Soumis le : lundi 1 juin 2015 - 15:34:32
Dernière modification le : lundi 12 novembre 2018 - 11:00:26

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  • HAL Id : hal-01158588, version 1

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Cyrielle Rudaz, Arnaud Demilecamps, Georg Pour, Margot Alves, Arnaud Rigacci, et al.. Bio-aerogels: new promising materials for thermal superinsulation. ICAE 2015, May 2015, Donostia San Sebastián, Spain. ⟨hal-01158588⟩

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