Analysis of Preparation and Performance for PVDF Flexible Pressure Sensors with Dome Structure on the Surface
This paper describes that polyvinylidene fluoride(PVDF)has good piezoelectricity and flexibility,and is one of the important materials for the preparation of flexible pressure sensors.However,due to the residual stress and pyroelectric effect,the PVDF-based flexible pressure sensors prepared by using traditional methods are not only complicated in process,but also have poor temperature stability.In order to solve these problems,a PVDF-based flexible pressure sensor is prepared in this paper using the flexoelectric effect,which is realized by constructing a dome type micron structure on the surface of the PVDF film.The effective piezoelectric charge coefficient and voltage coefficient of the sensor reach-12.1pC/N and 114mV·m/N,respectively,and exhibit good thermal stability in the temperature range from room temperature to 170 ℃.