Nano-composite films have been the subject of extensive work to develop the energy-storage efficiency
of electrostatic capacitors. Factors such as polymer purity, nano-particles size, and film morphology drastically
affect the electrostatic efficiency of the dielectric material that form an insulating film between
conductive electrodes of a capacitor. This in turn affects the energy storage performance of the capacitor.
In the present work, we have studied the dielectric properties of 4 high pure amorphous polymer films:
polymethylmethacrylate (PMMA), polystyrene, polyimide and poly-4-vinylpyridine. Comparison
between the dielectric properties of these polymers has revealed that the higher break down performance
is a character of polyimide PI and PMMA. Also, our experimental data shows that adding colloidal
silica to PMMA and PI leads to a net decrease in the dielectric properties compared to the pure polymer.
2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND