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Article Dans Une Revue Materials & Design Année : 2015

Tannin-based monoliths from emulsion-templating

Résumé

Highly porous monoliths prepared by emulsion-templating, frequently called polymerised High Internal Phase Emulsions (polyHIPEs) in the literature, were prepared from ``green'' precursors such as Mimosa bark extract, sunflower oil and ethoxylated castor oil. Various oil fractions, ranging from 43 to 80 vol.%, were used and shown to have a dramatic impact on the resultant porous structure. A critical oil fraction around 70 vol.% was found to exist, close to the theoretical values of 64% and 74% for random and compact sphere packing, respectively, at which the properties of both emulsions and derived porous monoliths changed. Such change of behaviour was observed by many different techniques such as viscosity, electron microscopy, mercury intrusion, and mechanical studies. We show and explain why this critical oil fraction is the one leading to the strongest and most homogeneous porous monoliths.
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Dates et versions

hal-01294575 , version 1 (29-03-2016)

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A. Szczurek, A. Martinez De Yuso, Vanessa Fierro, Antonio Pizzi, Alain Celzard. Tannin-based monoliths from emulsion-templating. Materials & Design, 2015, 79, pp.115-126. ⟨10.1016/j.matdes.2015.04.020⟩. ⟨hal-01294575⟩
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