Dielectric properties and modeling of multilayer polyimide nanocomposite to highlight the impact of nanoparticles dispersion

This paper describes a polyimide (PI)/nanocomposite multilayer 3D model design on the basis of actual boundary conditions attained from SEM images of synthesized films. The impact of nanoparticle dispersion on the electric field enhancement is explicitly described in the model. The electrical properties of these synthesized multilayer PI/nanocomposite films are also measured through experimental results. The results expose that the chances of nanoparticles dispersion are improved by pasting a thin PI/nanocomposite layer on both sides of PI film as compared to the single layer of PI/nanocomposite film. In consequence, less space charge and low electrical fields are observed in multilayer films. Our methods will help to reliably predict the dielectric strength of polymer/nanocomposite insulating materials. Additionally, the new synthesized multilayer PI/nanocomposite insulating material will ensure reliable operation for electric motors and increase its lifespan.