Novel glass materials-based (PVA/PVP/Al2O3/SiO2) hybrid composite hydrogel membranes for industrial applications: synthesis, characterization, and physical properties

Abstract

Metal oxides e.g., Al2O3 and SiO2 loaded-hydrogel blended membranes composed of poly(vinyl alcohol)/poly(vinyl pyrrolidone) (PVA/PVP, PVA/PVP/Al2O3, PVA/PVP/SiO2, PVA/PVP/Al2O3/SiO2) were successfully prepared on precleared glass plates by dip coating method. Meanwhile, series of obtained crosslinked hydride composite hydrogel membranes were successfully prepared using solution-casting method. Samples have been characterized for use in microelectronic devices. Results of X-ray diffraction revealed that the structure of doped sample with nanoparticle has a polycrystalline structure (hexagonal and Orthorhombic), while FE-SEM micrographs show grains in nanoscale and homogenous in nature of membranes. Interestingly, optical measurements of composites blended membranes were recorded using UV/Vis spectrometer. The optical parameters such as refractive index and optical energy gap were estimated. Moreover, complex dielectric constants were calculated optically for all composites, the experimental data shows the additive of nanoparticles composites has a direct energy band gap. Where, Eg for PVA/PVP/SiO2, PVA/PVP/Al2O3 and PVA/PVP/Al2O3/SiO2 at 1.82, 2.55, and 1.95 eV), respectively. While the sample PVA/PVP has an indirect band gap Eg of value 2.24 eV. Finally, the frequency dependence of the transport properties was measured, where results showed improvement of dielectric behavior with metal oxides loading. The experimental data of composite blended membranes can be used in optoelectronics devices.