Nanostructured interpenetrated organic-inorganic aerogels with thermal superinsulating properties

Abstract : Organic-inorganic composite aerogels were synthesized via a facile one-step impregnation of a wet hydrophobic cellulose II matrix with polyethoxydisiloxane solution followed by in situ NH4OH-catalysed formation of a nanostructured mesoporous silica network. The silica phase was subsequently hydrophobised with hexamethyldisilazane. By tuning synthesis conditions, organic-inorganic composite aerogels with various morphology (from meso- to macroporous), specific surface area (from 200 to 850 m2/g) and hydrophilic-hydrophobic balance (from fully hydrophilic to highly hydrophobic) were prepared after supercritical CO2 drying. The obtained organic-inorganic aerogels are monolithic, resistant to humidity and thermally superinsulating with the thermal conductivity 0.021–0.022 W/(m·K) in room conditions
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Soumis le : vendredi 16 septembre 2016 - 15:29:58
Dernière modification le : lundi 12 novembre 2018 - 10:59:37



Arnaud Demilecamps, Margot Alves, Arnaud Rigacci, Gudrun Reichenauer, Tatiana Budtova. Nanostructured interpenetrated organic-inorganic aerogels with thermal superinsulating properties. Journal of Non-Crystalline Solids, Elsevier, 2016, 452, pp.259-265. ⟨10.1016/j.jnoncrysol.2016.09.003⟩. ⟨hal-01367699⟩



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