The effect of ethanol on the permeability of block copolymer vesicle membranes

被引：7

作者：

Bauer, Alina

Kopschuetz, Carsten

Stolzenburg, Michael

Foerster, Stephan

Mayer, Christian ^{[1
]}

机构：

[1] Univ Duisburg Essen, Dept Chem Phys, D-45141 Essen, Germany

[2] Univ Hamburg, Dept Chem Phys, D-20146 Hamburg, Germany

来源：

JOURNAL OF MEMBRANE SCIENCE | 2006年 / 284卷 / 1-2期

关键词：

membrane permeability; block copolymer vesicles; PFG-NMR; ethanol; exchange;

D O I：

10.1016/j.memsci.2006.07.028

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

Membrane permeability of dispersed block copolymer vesicles is studied in the equilibrium state using pulsed field gradient nuclear magnetic resonance spectroscopy. It is found that the permeability for water molecules strongly depends on the ethanol content in the dispersion: an increase of the ethanol concentration from 0 to 40 vol% leads to a decrease of the average residence time by a factor of two. The phenomenon is completely reversible as the subsequent reduction of the ethanol concentration leads to the original permeability characteristics. Hence, it can be used to reversibly control the permeability of vesicle membranes. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1 / 4

页数：4

共 23 条

[1]

Diffusion of 77000 g/mol dextran in submicron polyelectrolyte capsule dispersions measured using PFG-NMR [J].