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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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Submitted on : Monday, June 1, 2015 - 3:34:32 PM
Last modification on : Friday, September 17, 2021 - 6:54:01 PM


  • HAL Id : hal-01158588, version 1


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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