On the specific filtration mechanism of a mesoporous silica membrane, prepared with non-connecting parallel pores

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorBoissière, Cédric
dc.creatorMartines, Marco U.
dc.creatorLarbot, André
dc.creatorProuzet, Eric
dc.date2014-05-27T11:21:18Z
dc.date2016-10-25T18:20:36Z
dc.date2014-05-27T11:21:18Z
dc.date2016-10-25T18:20:36Z
dc.date2005-04-01
dc.date.accessioned2017-04-06T01:12:46Z
dc.date.available2017-04-06T01:12:46Z
dc.identifierJournal of Membrane Science, v. 251, n. 1-2, p. 17-28, 2005.
dc.identifier0376-7388
dc.identifierhttp://hdl.handle.net/11449/68171
dc.identifierhttp://acervodigital.unesp.br/handle/11449/68171
dc.identifier10.1016/j.memsci.2004.09.037
dc.identifier2-s2.0-15244344191
dc.identifierhttp://dx.doi.org/10.1016/j.memsci.2004.09.037
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/889544
dc.descriptionWe report the singular filtration properties of an ultrafiltration membrane made with 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 [Boissière et al., An ultrafiltration membrane made with mesoporous MSU-X silica, Chem. Mater. 15 (2003) 460-463]. 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 2000 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. © 2004 Elsevier B.V. All rights reserved.
dc.languageeng
dc.relationJournal of Membrane Science
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectMembrane
dc.subjectMesoporous
dc.subjectSilica
dc.subjectSurfactants
dc.subjectUltrafiltration
dc.subjectCatalysts
dc.subjectMolecular weight
dc.subjectPolyethylene oxides
dc.subjectPolymeric membranes
dc.subjectPorosity
dc.subjectSodium compounds
dc.subjectSurface active agents
dc.subjectInterfacial growth
dc.subjectMesoporous silica membranes
dc.subjectRetention
dc.subjectUltrafiltration membranes
dc.subjectFiltration
dc.subjectaluminum oxide
dc.subjectfluoride sodium
dc.subjectmacrogol
dc.subjectoligomer
dc.subjectsilicon dioxide
dc.subjectsurfactant
dc.subjectmembrane structure
dc.subjectmembrane technology
dc.subjectporosity
dc.subjectultrafiltration
dc.subjectartificial membrane
dc.subjectcatalyst
dc.subjectfiltration
dc.subjectmembrane permeability
dc.subjectmicelle
dc.subjectpH
dc.subjectpolymerization
dc.subjectpriority journal
dc.subjectseparation technique
dc.titleOn the specific filtration mechanism of a mesoporous silica membrane, prepared with non-connecting parallel pores
dc.typeOtro


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