Structural and Dielectric Properties of Polyvinyl Alcohol‐TiO₂ Doped Thin Films

Abstract

Polyvinyl alcohol(PVA)‐titanium dioxide(TiO2) polymer composite films are synthesized by well‐recognized and low cost method of solvent casting. The prepared composite films are characterized by FTIR, XRD, and FESEM. The real electric modulus (M’) spectra show large increment with frequency for 5wt% of TiO2 as compared to other compositions. The appearance of peaks for each concentration of TiO2 in M” spectra specifies that strong coupling in the movement of polymer motion and ions. The impedance plots of real impedance (Z’) versus imaginary impedance (Z”) shows semicircles, which diameter and thereby bulk resistance (Rb) is decreased with the loading of TiO2. AC conductivity (σAC) obeys the universal power law. The prepared PVA/TiO2 films can be used in a direct methanol fuel cell, and in optoelectronic devices.

Probing the tightly bound layer in poly(vinyl alcohol) thin films using swelling measurements

“…Polymer thin films also find use in a wide range of applications including actuators and sensors, and in coatings, fuel cells, optoelectronics, flexible and wearable technologies, biomedicine and biomaterials. [13][14][15][16] Therefore, understanding the chemistry and physics of polymer thin films is of great importance for fundamental science and as well as for applications.…”