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Título

Copolyimide mixed matrix membranes with oriented microporous titanosilicate JDF-L1sheet particles

AutorGalve, Alejandro; Vispe, Eugenio ; Téllez, Carlos; Coronas, Joaquín
Fecha de publicación2011
EditorElsevier
CitaciónJournal of Membrane Science 370(1-2): 131-140 (2011)
ResumenJDF-L1 is a microporous titanosilicate exhibiting a layer structure with pore size of about 3 Å. It is consequently an attractive material to separate H2-containing mixtures. This is the reason why JDF-L1, after disaggregation by means of hexadecyltrimethylammonium surfactant, has been combined with a carboxyl group containing copolyimide (6FDA-4MPD/6FDA-DABA 4:1) to produce mixed matrix membranes, which were applied to the separation of H2/CH4 and O2/N2 mixtures. Additionally, due to the sheet growth habit of JDF-L1 crystals, a preferential horizontal orientation of the JDF-L1 filler particles dispersed into the polymer was expected. This preferential orientation, which was achieved when the polymer solution concentration used during the membrane casting process was relatively low, has been studied by optical and electronic microscopy, X-ray diffraction and polarized Raman spectroscopy. A quantitative analysis was carried out applying Cussler's model for mixedmatrixmembranes with oriented flakes.
URIhttp://hdl.handle.net/10261/52543
DOI10.1016/j.memsci.2011.01.011
ISSN0376-7388
Identificadoresdoi: 10.1016/j.memsci.2011.01.011
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