Comparative study on the dielectric properties of three polyvinylidene fluoride nanocomposites incorporated with carbon filler

Poly(vinylidene fluoride) (PVDF)-carbon nanotube (CNT) composites with three different CNTs were prepared by a solution blending and hot-press method. The morphologies of nanocomposites were studied by scanning electron microscopy. The X-ray diffraction and differential scanning calorimeter data indicated that the addition of CNTs can promote the formation of -phase of PVDF. The dielectric constant values of three PVDF/CNTs are much greater than that of neat PVDF. It has been found that the dielectric loss of the short hydroxylated CNTs filled PVDF nanocomposite is lower than those of other two long pristine CNTs filled PVDF nanocomposites.