Self-diffusion of water-ethanol mixture in chitosan membranes obtained by pulsed-field gradient nuclear magnetic resonance technique

被引：13

作者：

Volkov, VI

Skirda, VD

Vasina, EN

Korotchkova, SA

Ohya, H ^{[1
]}

Soontarapa, K

机构：

[1] Yokohama Natl Univ, Dept Mat Sci & Chem Engn, Hodogaya Ku, Yokohama, Kanagawa 240, Japan

[2] Kazan State Univ, Dept Mol Phys, Kazan 420008, Russia

[3] LY Karpov Phys Chem Res Inst, Lab Membrane Proc, Moscow 103064, Russia

来源：

JOURNAL OF MEMBRANE SCIENCE | 1998年 / 138卷 / 02期

关键词：

self-diffusion; pulsed-field gradient nuclear magnetic resonance; chitosan;

D O I：

10.1016/S0376-7388(97)00232-9

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The self-diffusion of water and ethanol for crosslinked and uncrosslinked chitosan membranes have been investigated by pulsed-field gradient nuclear magnetic resonance (NMR) spectroscopy. It has been shown that during diffusion processes, water and ethanol are localized in different parts of the chitosan membrane, In the crosslinked membrane, the self-diffusion coefficient for water is higher, but that for ethanol is essentially lower, than those for the uncrosslinked membrane. For this reason, the mobility selectivity is essentially higher in crosslinked membrane as compared to the uncrosslinked. The sorption selectivity are the same for these two types of membranes. (C) 1998 Elsevier Science B.V.

引用

页码：221 / 225

页数：5

共 6 条

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[2]

Guo Q. H., 1995, J MEMBRANE SCI, V98, P223

[3]

OHYA H, 1994, WATER TREATMENT, V9, P235

[4] SELF-DIFFUSION OF WATER-ETHANOL MIXTURES IN POLYACRYLIC-ACID POLYSULFONE COMPOSITE MEMBRANES OBTAINED BY PULSED-FIELD GRADIENT NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY [J].