Net penetration charges of an ion-penetrable membrane in a general electrolyte solution
Journal
Journal of Colloid And Interface Science
Journal Volume
176
Journal Issue
1
Pages
256-263
Date Issued
1995
Author(s)
Kuo Y.-C.
Abstract
An analytical expression is derived for the net amount of charges penetrating into a membrane, which is immersed in an electrolyte solution. The membrane carries fixed charges due to, for example, the dissociation of the functional groups it carries. Planar, cylindrical, and spherical membranes and a general electrolyte solution are considered. The estimation of the amount of penetration charges is essential to the description of membrane properties. We show that the amount of fixed charges and the potential gradient at the membrane-liquid interface are two key factors to determine the net amount of charges penetrating into a membrane. The deviation of the present approximate result from the corresponding exact value, which needs to be evaluated numerically, is on the order of 5%. ? 1995 by Academic Press, Inc.
Subjects
Charged
Cylindrical
Distribution
Electrolyte solution
Electrostatic potential
General
Gradient
Ion-penetrable
Membrane
Net penetration charges
Perturbation solution
Planar
Poisson-Boltzmann equation
Spherical
Type
journal article