Preparation and characterisation of silica monoliths using a triblock copolymer (F68) as porogen.
Silica-based monoliths with co-continuous structure were successfully prepared through a sol-gel process in the presence of a poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (F68). The triblock copolymer was compared to the classical PEG, in the formation of silica monoliths and was demonstrated to lead to co-continuous structures in a wider composition range, presenting smaller through pores. Moreover, mesoporous structures templated at the sol-gel transition were assumed to occur at the surface of the silica skeleton while PEG exhibited no mesopore templating.
Laboratoire de Chimie Analytique et Sciences Séparatives, UMR 7178 IPHC-DSA, ECPM 25 rue Becquerel, 67087 Strasbourg Cedex, France.
Joseph
J
Chamieh
Yvan
Y
Zimmermann
Anne
A
Boos
Agnès
A
Hagège