Pervaporation of ionically surface crosslinked chitosan composite membranes for water-alcohol mixtures

被引：90

作者：

Lee, YM

Nam, SY

Woo, DJ

机构：

[1] Department of Industrial Chemistry, College of Engineering, Hanyang University

[2] Yukong Taeduk Inst. of Technology, Taejon, 140-1 Wonchon-dong, Yusung-ku

来源：

JOURNAL OF MEMBRANE SCIENCE | 1997年 / 133卷 / 01期

关键词：

pervaporation; water-alcohol mixtures; chitosan; composite membranes; surface crosslinking;

D O I：

10.1016/S0376-7388(97)00089-6

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Chitosan composite membranes were prepared by casting solution onto a porous polyethersulfone ultrafiltration membrane with various surface crosslinking densities. Pervaporation performance of water-alcohol mixtures through the surface crosslinked chitosan composite membranes exhibited a high selectivity value with a low permeation flux. By increasing feed ethanol concentration, permeate flux decreased and water concentration in the permeate decreased drastically at a feed ethanol concentration above 97 wt%. Permeation rate of chitosan composite membranes :is less temperature-dependent than that of PVA. IPA-water mixture has a similar tendency as that of ethanol-water mixture in pervaporative dehydration performances.

引用

页码：103 / 110

页数：8

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