Effect of Titanium Dioxide Core Polystyrene Shell Nanoparticles on the Dielectric Strength of Polystyrene Films

摘要

High energy density capacitors are critical components for energy storage,directed energy weapons,and other applications which require rapid discharge of electrical energy. New dielectric materials with both high dielectric constant and simultaneously high dielectric strength are required to increase the energy density for these devices.1 In this study,the dielectric strength of titanium oxide core,polystyrene shell nanoparticles (TiO2-PS) blended with polystyrene homopolymer has been studied. The addition of high dielectric constant titanium oxide nanoparticles to polystyrene films results in increases in permittivity for these films from 2.5 up to 8.2 for films.2 In the current study we observe a decrease in dielectric strength from 370 +/- 112 V/micron for polystyrene to 230 +/- 76 V/micron for films composed exclusively from titanium oxide core polystyrene shell particles (dielectric strength is measured using breakdown electric fields).