A STUDY ON THE EFFECT OF STA/APTEOS IN THE PVA MATRIX BASED ORGANIC/INORGANIC COMPOSITE MEMBRANES

Abstract

The development of an organic-inorganic based membranes emerges because of its good film forming capabilities and enhanced electrochemical properties. Poly (vinyl alcohol)  (PVA)/ γ-aminopropyl triethoxysilane (APTEOS) with the heteropoly acid Silicotungstic acid (STA) hybrid membranes were prepared by solvent casting technique. Incorporation of STA and APTEOS in the PVA matrix and its structural analyzation was carried out by X-ray diffraction (XRD) analysis. The uniform distribution of STA and APTEOS were indicated by the broadening of peaks in the complexes. The dielectric behavior such as dielectric loss, dielectric constant and tangent loss were studied for the prepared proton exchange membranes using electrochemical impedance technique.