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Nanostructuration of cellulose aerogels and their organic-inorganic hybrids

Abstract : Cellulose aerogels can be prepared via dissolution-coagulation-drying with supercritical CO2 (so-called “Aerocellulose”). They are ultra-light (apparent density 0.05-0.20 g/cm3), with rather high specific surface (200-300 m2/g) and pore sizes distribution ranging from a few tens of nanometers to few microns. In the view of Aerocellulose nanostructuring (for example, to achieve low thermal conductivity), two approaches were taken: i) cellulose chemical cross-linking and ii) preparation of cellulose-silica hybrid aerogels. Compared to pure Aerocellulose the thermal conductivity of such nanostructured Aerocellulose was found to be reduced and specific surface of organic-inorganic hybrids was increased up to 800 m2/g. Structure-properties relationships of these novel materials will be discussed.
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Submitted on : Wednesday, February 4, 2015 - 10:49:16 AM
Last modification on : Thursday, November 5, 2020 - 4:10:21 PM

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  • HAL Id : hal-01113013, version 1

Citation

Cyrielle Rudaz, Arnaud Demilecamps, Sylvie Calas-Etienne, Rémi Courseau, Laurent Bonnet, et al.. Nanostructuration of cellulose aerogels and their organic-inorganic hybrids. 247th ACS national meeting, American Chemical Society (ACS), Mar 2014, Dallas, United States. ⟨hal-01113013⟩

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