High-dielectric-constant all-polymer percolative composites

Abstract

We report here an all-polymer high-dielectric (dielectric constant $\text{K>1000}$ at 1 kHz) percolative composite material, fabricated by a combination of conductive polyaniline particles ${\text{(K>10}}^5)$ within a poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) terpolymer matrix $\text{(K>50).}$ These high-K polymer hybrid materials also exhibit high electromechanical responses. For example, 1.5% strain, which is proportional to the square of the field applied, can be induced by a field of 9.5 MV/m, an eightfold reduction in field applied compared with that in a fluoroterpolymer matrix.