THE ANALYSIS OF ELECTRIC PROPERTIES OF THIN-FILM COMPOSITE REVERSE-OSMOSIS MEMBRANE WITH WET IMPEDANCE METHOD

A study on the electric properties of reverse osmosis composite membra ne was conducted by wet impedance method. The thin film of composite m embrane was prepared by interfacial polycondensation with 1,3-phenylen e diamine and 1,3,5-benzene tricarbonyl chloride, The electric resista nce and capacitance of polyamide skin layer of composite membrane was analyzed by alternating current. The dielectric constant of membrane w as also analyzed and compared with theoretical value. Concentration an d dipping time of aqueous phase play major role in electrical properti es of membrane. The effect of acid treatment on membrane properties wa s also investigated. (C) 1998 Elsevier Science B.V. All rights reserve d.