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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Preparation and Pervaporation Separation Properties of Polyurethane Membranes
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 2005-2008)
Author(s): Hong Ye, School of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing, China
Jing Wang, School of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing, China
Hai-yan Liang, School of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing, China
Xu-dong Feng, School of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing, China
Qun Yu, School of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing, China
Abstract: Three kinds of polyurethane (PU) membranes were prepared by solution polymerization from soft segments including polyethyleneglycol adipate (PEGA) and polybutadiene (HTPB), and β-cyclodextrin (β-CD) as a kind of new chain extender was used. The structures and thermal properties of PU membranes were characterized by FTIR and DSC. The swelling degrees and pervaporation performances to water/ethanol mixtures were also investigated. The results showed that the swelling degree increased with β-CD added, and PEGA-based PU membranes were better swelled than HTPB-based in water/ethanol mixtures. All these membranes were water selective in pervaporation test. The membranes with HTPB as soft segments had better separation properties than that with PEGA, and PU membranes with β-CD as chain extender obtained higher flux but lower selectivity than those without β-CD. The HTPB-based PU membranes without β-CD had a flux of 23.60 kg?μm?m-2?h-1 and separation factor of 317.50 for 10 wt% water in the water/ethanol mixture at 40 °C.
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