ASYMMETRY POTENTIAL IN INHOMOGENEOUS MEMBRANES

被引：17

作者：

GARRIDO, J ^{[1
]}

COMPAN, V ^{[1
]}

机构：

[1] UNIV JAUME 1,DEPT CIENCIAS EXPTL,E-12071 CASTELLON PLANA,SPAIN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1992年 / 96卷 / 06期

关键词：

D O I：

10.1021/j100185a059

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work the asymmetry potential of ultrafiltration membranes is studied. The membranes used are made of polysulfone with a support of polyester. The theoretical analysis is developed within the frame of the thermodynamics of irreversible processes. The transient character of the asymmetry potential is emphasized. An experiment where the asymmetry potential changes following a nonstationary process has been designed and a new model for this potential is given. Membranes exhibit asymmetry potential when the concentration profile is not uniform and the profile of the apparent transference number of the cation is asymmetric. We also conclude that changes in the asymmetry potential are due to diffusion processes into the membrane.

引用

页码：2721 / 2724

页数：4

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