An ultrafiltration membrane, prepared with MSU-type mesoporous silica: preparation and specific filtration behavior

摘要: We 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 support. This supported on tubular commercial macroporous alumina supports was prepared by interfacial growth mechanism between stable silica-surfactant hybrid micelles association oligomers polyethyleneoxide-based (PEO) surfactants sodium fluoride, a well-known condensation catalyst. It appears combined effect nature membrane, whose surface charge can be easily adjusted changing pH non-connected shape provides new behavior in retention properties, as proved polyoxyethylene polymers different molecular weights. Depending conditions rejection rate 80% steep cut-off at 2,000 Da obtained or, reverse, three times bigger than pore diameter diffuse through membrane. mechanism, which opens up modes separation modes, is explained light both topology porous network pH-dependent interactions PEO media.