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Novel Hollow Titania Spheres‐Chitosan Hybrid Membranes with High Isopropanol Dehydration Performance
Author(s) -
Liu G.,
Jiang Z.,
Wang Y.,
Yang D.
Publication year - 2013
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201200353
Subject(s) - membrane , polyacrylonitrile , chemical engineering , chitosan , materials science , crystallinity , thermal stability , dehydration , pervaporation , aqueous solution , composite number , polymer chemistry , chemistry , composite material , organic chemistry , polymer , permeation , biochemistry , engineering
A new kind of hollow titania spheres‐chitosan (hTiO 2 ‐CS) hybrid membranes was prepared by a physical blending method. hTiO 2 spheres were found to disperse well in the as‐prepared hTiO 2 ‐CS hybrid membranes. Their incorporation can reduce the chitosan crystallinity and enhance slightly its hydrophilicity and thermal stability. Subsequently, hTiO 2 ‐CS/PAN composite membranes comprising of the hTiO 2 ‐CS hybrid membrane as separation layer and a polyacrylonitrile (PAN) membrane as support layer were fabricated. Compared to the CS/PAN membrane, all of them exhibit a much better flux and separation factor for a 90 wt % aqueous solution of isopropanol at 80 °C. This promising kind of composite membranes may find potential application in the dehydration of alcohols.