AN ALGORITHM FOR THE CALCULATION OF THE ELECTROSTATIC REPULSION BETWEEN SURFACE-COATED WITH A CHARGE MEMBRANE

We propose a numerical procedure for the calculation of the electrosta tic repulsion force between two identical, parallel surfaces immersed in an a:b electrolyte solution. These surfaces are coated with an ion- penetrable membrane carrying fixed charges. The amount of fixed charge s is governed by the dissociation of the functional groups in the memb rane phase. The effect of pH on the degree of dissociation of these fu nctional groups is taken into account. The difficulty of extensive use of Jacobi elliptic function in the numerical treatment of Poisson-Bol tzmann equation can be circumvented by resorting to the present algori thm.