Highly permeable mesoporous silica membranes synthesized by vapor infiltration of tetraethoxysilane into non-ionic alkyl poly(oxyethylene) surfactant films
作者： M MIYAMOTO , K NAGATA , T MARUO , N NISHIYAMA , K YOGO
DOI: 10.1016/J.MEMSCI.2008.08.043
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摘要: Abstract Mesoporous silica membranes were prepared on porous alumina substrates by a vapor infiltration of tetraethoxysilane (TEOS) into non-ionic poly(oxyethylene) (Brij56) surfactant film. Periodic mesostructured formed both α- and γ-alumina pre-treated with polystyrene. The polystyrene polymer plugged the pores inhibited deposition in pores, resulting formation very thin membrane without silica/alumina composite layer at interface between mesoporous substrates. calcined showed high nitrogen permeance (>10 −6 mol m −2 s −1 Pa ). single gas permeation was governed Knudsen diffusion mechanism. durability against moisture air improved silylation trimethylethoxysiliane.
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