Conductive Network and β Polymorph Content Evolution Caused by Thermal Treatment in Carbon Nanotubes-BaTiO3 Hybrids Reinforced Polyvinylidene Fluoride Composites

摘要: A good dispersion of carbon nanotube (CNT) in polyvinylidene fluoride (PVDF) is realized by using CNT and BaTiO3 (BT) hybrids (H-CNT-BT) with a special core–shell structure. Thus, high dielectric performance achieved for the composite (H-CNT-BT/PVDF). Carried BT, easy to connect each other thus more interface area may be created which helps achieve an extremely low percolation threshold (fc). Moreover, permittivity near fc increased than three times after thermal treatment while loss remains at level. In order study comprehensively about influence treatment, situ synchrotron X-ray used detect recrystalline behavior PVDF. Results wide-angle diffraction (WAXD) small-angle scattering (SAXS) show that content β polymorph has nearly double CNT-PVDF, thickness amorphous layers (La) PVDF’s long p...