Synergistic enhancement of dielectric constant of novel core/shell BaTiO3@MWCNTs/PEN nanocomposites with high thermal stability

In this work, the multi-walled carbon nanotubes (MWCNTs) cores were coated with inorganic BaTiO3 (denoted as BaTiO3@MWCNTs) via solvent-thermal method. Then, BaTiO3@MWCNTs/polyarylene ether nitriles (PEN) nanocomposite films embedded with core/shell BaTiO3@MWCNTs nanotubes were successfully prepared by solution-casting method. Pure PEN film, MWCNTs/PEN and BaTiO3/PEN films were prepared for comparison. The micromorphology, thermal, and dielectric properties of the nanocomposite films were investigated. All the nanocomposite films exhibited excellent thermal stability endowed by PEN matrix. Interestingly, it was found that core/shell BaTiO3@MWCNTs exhibited synergistic enhancement of dielectric constant of BaTiO3@MWCNTs/PEN nanocomposite films.