PVDF/RGO based piezoelectric nanocomposite films for enhanced mechanical and dielectric properties

Abstract

Polymer nanocomposites are dominating today in the global scenario due to their diverse applications. The study involves the investigation of the role of Reduced graphene oxide (RGO) as nanofiller on mechanical and dielectric properties of Polyvinylidene difluoride (PVDF). Flexible piezoelectric thin films of PVDF loaded with RGO nanofillers were synthesized using a solvent casting technique. The crystal structure of neat PVDF and RGO loaded PVDF films were analysed using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). Tensile strength and Young’s modulus of polymer nanocomposite films were analysed by performing tensile testing on a universal testing machine (UTM). The results showed an improvement in elastic modulus up to a certain nanofiller percentage (2 wt% RGO). Measurement of dielectric properties of thin films was conducted using an impedance and material analyser (IMA). The dielectric constant of the film increases with increment in RGO loading. Thus, overall increment in piezoelectric properties take place. This nanocomposite can be used for developing flexible and highly sensitive sensors and actuators.