Fabrication and electrochemical properties of polymer bilayered membranes

In this paper we report on a fabrication method of the “diode-like” polymer bilayered membranes that possess asymmetry of conductivity in electrolyte solutions—a rectification effect similar to that of a p–n junction in semiconductors. To produce membranes with the “diode-like” properties, a thin semipermeable polymer layer formed by plasma polymerization of organic compounds was deposited on one side of a porous substrate, where the substrate was a poly(ethylene terephthalate) track membrane. Pyrrole, thiophene, acetylene and 1,1,1,2-tetrafluoroethane were used as monomers to obtain the polymer layers on the membrane surface.