Effect of surface modification of ceramic particles by SDS on the electrical properties of PZT-PVDF and BT-PVDF composites: interface effect

Homogenous ceramic polymer composites of sodium dodecyl sulfate (SDS) modified BaTiO3 (BT) and PZT particles as fillers and polyvinylidene fluoride (PVDF) as matrix have been developed using solution casting technique followed by hot pressing. XRD analysis confirmed the presence of both ceramic and polymer phase. The composites comprising of treated ceramic particles exhibited enhanced dielectric permittivity and reduced dielectric loss as compared with the untreated one. Furthermore, the energy density is significantly enhanced after the surface modification with SDS and the maximum energy density of 38.57 J/l was observed for SDS modified PZT-PVDF. The results showed that the addition of SDS modified ceramic particles and interface areas binds the polymer matrix with ceramic particles by electrostatic interactions and hence have an impact on the enhancement of the dielectric responses, remanent polarization and energy density of the composites.