Poly(vinylidene fluoride) Piezoelectric Film Characteristics by Poling Conditions for Distributed Tactile Sensor

The poling characteristics of PVDF (poly(vinylidene fluoride)) film was investigated by measuring the electric voltage generated by the external load for the distributed tactile sensor applications. The poling conditions for the PVDF films were controlled by changing temperature and electric field, and the resulting crystal structure of the -phase crystal was confirmed by FT-IR, DSC, and XRD experiments. The -phase crystal was increased with the poling temperature and poling voltage, and subsequently the permittivity of the Poled PVDF films was increased. Finally, the prototype tactile sensor was tested by a 8 8 may circuit exhibiting high voltage signal for the highly poled PVDF films.