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dc.contributor.authorProuzet, Eric-
dc.contributor.authorLarbot, André-
dc.contributor.authorBoissière, Cédric-
dc.contributor.authorMartines, Marco U.-
dc.identifier.citationStudies in Surface Science and Catalysis, v. 156, p. 481-488.-
dc.description.abstractWe report preparation and the singular filtration properties of an ultrafiltration membrane made with MSU-type mesoporous silica that exhibits cylindrical pores aligned mostly normal to the support. This membrane supported on tubular commercial macroporous alumina supports was prepared by the interfacial growth mechanism between stable silica-surfactant hybrid micelles made of the association of silica oligomers with polyethyleneoxide-based (PEO) surfactants and sodium fluoride, a well-known silica condensation catalyst. It appears that the combined effect of the silica nature of the membrane, whose surface charge can be easily adjusted by changing the pH and the non-connected cylindrical shape of the pores provides a new behavior in the retention properties, as proved by the filtration of polyoxyethylene polymers (PEO) with different molecular weights. Depending on the filtration conditions, a rejection rate of 80 % and a steep cut-off at 2,000 Da can be obtained or, on the reverse, polymers three times bigger than the pore diameter can diffuse through the membrane. This new filtration mechanism, which opens up new modes of separation modes, is explained in the light of both topology of the porous network and pH-dependent interactions between PEO polymers and silica porous media. © 2005 Elsevier B.V. All rights reserved.en
dc.titleAn ultrafiltration membrane, prepared with MSU-type mesoporous silica: Preparation and specific filtration behavioren
dc.contributor.institutionUniversité Pierre et Marie Curie (Paris VI) Tour 54-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationInstitut Européen des Membranes (CNRS UMR 5635) CNRS, 1919 route de Mende, F-34293 Montpellier Cedex 5-
dc.description.affiliationChimie de la Matière Condensée (CNRS UMR 7574) Université Pierre et Marie Curie (Paris VI) Tour 54, 4 Place Jussieu, F-75252 PARIS Cedex 05-
dc.description.affiliationInstitute de Química de Araraquara UNESP, Caixa Postal 355, CEP 14801-970 Araraquara, Sao Paulo-
dc.description.affiliationUnespInstitute de Química de Araraquara UNESP, Caixa Postal 355, CEP 14801-970 Araraquara, Sao Paulo-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofStudies in Surface Science and Catalysis-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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