Frictional coefficients and activation energies for permeation through cellulose acetate membranes

Analysis of previous experimental results, referring to water permeation in cellulose acetate membranes, is presented by using the frictional model proposed by Kedem and Katchalsky. The frictional coefficients decrease with temperature. The conclusions about the transport mechanisms responsible for the flow resemble those obtained in our previous papers. The activation energies for permeation have been calculated; they are of the same order of magnitude as those reported by other authors. The relation between frictional coefficients and activation energies is considered.