Preparation, properties and applications of novel cellulose and cellulose acetate aerogels

Abstract : Novel various aerogel-like materials were prepared from the biomass, cellulose and cellulose derivatives, either from their solutions or via physical or chemical gelation and drying in CO2 under supercritical conditions. Two classes of materials will be discussed: based on pure cellulose and on cellulose acetate. Pure cellulose highly porous material, Aerocellulose, was made from cellulose dissolved in green solvents, aqueous NaOH or ionic liquids. An overview of the main preparation steps is given, from cellulose dissolution and solution-state properties, to regeneration kinetics, solvent exchange and drying. The porosity of Aerocellulose is higher than 90% with pore sizes from a few tens of nanometers to a few tens of micrometers. The density ranges from 0.06 to 0.3 g/cm3. Aerogels based on cellulose acetate were synthesised by crosslinking cellulose acetate dissolved in acetone with a non-toxic isocyanate as a cross-linker, using different catalysts (dibutyltin dilaurate, a triethylamine and pyridine). Mesoporous nanostructured network was obtained after drying; pore sizes vary from 10 to 30 nm and density from 0.25 to 0.85 cm3/g. Two applications of these new materials are discussed: as thermal insulators and carbons in proton exchange membrane fuel cell.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00490283
Contributeur : Magalie Prudon <>
Soumis le : mardi 8 juin 2010 - 10:48:25
Dernière modification le : vendredi 25 janvier 2019 - 14:48:01

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  • HAL Id : hal-00490283, version 1

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Roxane Gavillon, Claudia Hildenbrand, Florent Fischer, Romain Sescousse, Arnaud Rigacci, et al.. Preparation, properties and applications of novel cellulose and cellulose acetate aerogels. BIOFOAMS 2009, Oct 2009, Niagara Falls, Canada. Paper no 7 - 6 p. ⟨hal-00490283⟩

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