Abstract
Piezoelectric Poly (vinylidene fluoride) (PVDF) films with high flexibility are a suitable and promising replacement for rigid ceramic piezoelectric materials. However, for this purpose, enhancing piezoelectric properties and adopting an industrial fabrication method are of great importance. In this study, 5–9 µm thick PVDF films were fabricated by a nozzle-less ultrasonic spray coating (USC) system, followed by an annealing process at 100 °C. By applying proper spraying parameters, we could obtain highly uniform films with large d33 values (48 pm/V) and 56% crystallinity. Results show that the uniformity of the films plays an important role in the final piezoelectric properties. Thus, ultrasonic spray coating method can be used for fabrication of large-scale piezoelectric films with no need for poling or stretching processes.
Highlights
Since 1969, when PVDF was discovered as an organic piezoelectric material [1], a wide variety of research has been done on piezoelectric PVDF films
Ferroelectric PVDF-TrFE films have been recently used in nano electric devices such as nonvolatile memories [10], photodetectors [11], field-effect transistors [12], and PVDF composites are used for electric accessories and embedded capacitors [13]
We study the fabrication of freestanding PVDF films with enhanced piezoelectric properties via a nozzleless ultrasonic spray coating system without poling
Summary
Since 1969, when PVDF was discovered as an organic piezoelectric material [1], a wide variety of research has been done on piezoelectric PVDF films. The outstanding mechanical properties of PVDF as a lead-free material, in comparison to inorganic piezoelectric single crystals and ceramics, have drawn the attention of many researchers [1,2,3,4]. Their focus has been mostly on polymer chain. Structure [5], fabrication methods [6,7], piezoelectric properties [2], mechanical strength [8], and sensor/actuator/energy harvesting applications [1,3,4,9]. Seeking a reliable and simple method for industrial fabrication of these piezoelectric films is of great importance
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
