Ultrasonic study of HEC/ ZnO and HEC/ TiO2 film composites prepared by casting method

Abstract

The HEC/ZnO and HEC/TiO₂ composite membranes were prepared by a sol-gel casting method. In order to evaluate some physical properties of HEC/TiO₂ and HEC/ZnO composites the ultrasonic measurements were performed for the samples at room temperature (298.15 K.) with frequency (35KHz), these properties are ultrasonic velocity, compressibility, bulk modulus, absorption coefficient, relaxation amplitude, transmittance, relaxation time and viscosity. It was found that there is significant relationship between ultrasonic velocity and material properties also results show that adding ZnO and TiO₂ effect on densities which were responsible for the ultrasonic wave’s absorption inside the composites which effected also on the transmittance and reduce velocity.

Keywords: HEC composite; ZnO; TiO2; Ultrasound technique; physical properties