Polyarylene ether nitrile/graphene oxide dielectric nanocomposite plasticized by silicone powder

Abstract

Polymer dielectric materials have attracted much attention recently due to their lightweight, low cost and easy processing. In this work, a novel composite film of polyarylene ether nitrile/silicone powder/graphene oxide (PEN/silicone powder/GO) was prepared, in which GO acted as a functional filler to improve the dielectric constant of the material while silicone powder acted as a plasticizer to improve the molding fluidity of the material as well as the compatibility of filler and polymer matrix. The prepared PEN/silicone powder/GO nanocomposites exhibited a high dielectric constant of 5.94 and low dielectric loss of 0.016 at 103 Hz. Differential scanning calorimetry, thermogravimetric analysis and mechanical and rheological tests showed that introduction of silicone powder improved overall performance of the composites, including decent thermal and mechanical properties, better flowability, and better compatibility and processing applicability. Meanwhile, the PEN/silicone powder/GO dielectric composite films can be easily prepared, presenting great application potential in the field of organic film capacitors.