The Cu@SiO2 core-shell nanoparticles filled polyvinylidene fluoride nanocomposites film: Fabrication, characterization and dielectric property analysis

In this paper, the Cu@SiO2 core-shell particles were synthesized using a simple method and well characterized with XRD and SEM techniques. The results of TEM show that a thickness of 15–20 nm SiO2 shell were uniformly coated on the surface of copper particles. The dielectric properties of the PVDF composites filled with Cu@SiO2 particles were measured and analyzed. The results show that the dielectric constant of PVDF flexible composites film increases with increasing filler content. Moreover, the 19vol% composite film presents obvious nonlinear I–V properties, which indicates that this film can be used for ESD protection circuit.