Enhanced p-crystalline phase in poly(vinylidene fluoride) films by polydopamine-coated BaTiO_3 nanoparticles

摘要

In this study we provide a simple but effective method to enhance the p-crystalline phase of poly (vinylidene fluoride) (PVDF), in which the polydopamine (Pdop) coated BaTiO_3 nanoparticles (BT NPs) were incorporated into PVDF matrix by solution casting. Comparing with the neat PVDF and PVDF containing the BT NPs, the PVDF films containing Pdop-coated BT NPs were more homogeneous and possess more β-phase. More results from the piezoresponse force microscope and d_(33)-meter measurement, confirmed that the proper wrapping of the BT NPs by functional organic ad-layers could improve the dispersibility and accordingly the polar environment favored the formation of the β-phase.