A new designed cationic exchange polymer membrane (CEM) and anionic exchange polymer membrane (AEM) were proposed in this study, and the transport properties of these new designed polymer membranes were investigated via diffusion coefficients as well. The diffusion coefficients of these polymer membranes in contact with different redox substances were calculated qualitatively by electrochemical techniques such as cyclic voltammetry (CV). Also, the diffusion coefficients of AEM and CEM were calculated quantitatively by using chronopotentiometry (CP) and chronocoulometry (CC) techniques. One can mention from this study the performance of a membrane depend on content of polymer gel, anionic exchange polymer site (20 wt.%) or cationic polymer exchange site (50 wt.%). Also, the ionic transport of newly designed ion exchange membrane could be explained by using electrochemical measurements such as CV, CP and CC techniques (c) 2006 Elsevier B.V. All rights reserved.