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

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. Differ-ential 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 po-tential in the field of organic film capacitors.

Automated summary

By preparing PEN/silicone powder/GO composite materials, this study successfully improved the performance of polymer dielectric materials, including increasing the dielectric constant and improving the molding fluidity and compatibility of the material. In addition, the composite material also showed improved thermal and mechanical properties, and it can be easily prepared, presenting great potential for applications.