Abstract Scope |
Poly(vinylidene fluoride) (PVDF) compounds present very wide application in strategic technological areas due to the intrinsic ferroelectric property, which allows their use in electro-electronic devices, such as electro-mechanical and electro-thermal transducers, speakers, sensors, and to stimulate the bone tissue growth in animals. Although PVDF presents the best electroactive properties, compared to other ferroelectric polymers, these properties are lower than those observed in ferroelectric ceramics. In this work, hybrid composites based on PVDF/BaTiO3, PVDF/BaFe12O19, and PVDF/SrFe12O19 were studied considering different doping concentrations. The physical properties have been investigated from structural, microscturcutral, optical and dielectric characterizations. The XRD, FT-IR, and AFM measurements confirmed the incorporation of dopants in the polymeric matrix. An increase in the dielectric permittivity caused by the ceramic doping was also observed. The authors thank Fundect, CNPq (483683/2010-8, 208232/2014-1 and 303447/2019-2), FAPEMIG (PPM-00661-16 and APQ-02875-18), FINEP (04.13.0448.00/2013) and CAPES (Finance Code 001) Brazilian agencies for the financial support. |