Flexible Piezoelectric Sensors Based on Electrostatically Spun PAN/K-BTO Composite Films for Human Health and Motion Detection

Flexible piezoelectric sensors made of composite nanofiber materials have gained wide acceptance due to their suitability for wearable electronics, human health monitoring, and motion tracking. Enhancing the piezoelectric characteristics of these nanofibers holds significant promise for creating advanced, flexible, wearable sensors. In this article, KH550-modified barium titanate (K-BTO) was successfully dispersed uniformly in polyacrylonitrile (PAN) nanofibers to form a composite nanofiber membrane fabricated through electrostatic spinning techniques. The piezoelectric performance of the PAN/K-BTO composite membrane exhibited notable improvements compared to the pure PAN membrane, reaching an output voltage of up to 12.33 V and a current of 4.93 μA while exhibiting excellent sensitivity (1.63 V/N). In addition, potential applications of the PAN/K-BTO membrane as a flexible wearable sensor were systematically investigated. Sensors were systematically investigated for their potential applications, and their superior flexibility, sensitivity, and stability could be applied to monitor human movement. This research offers an innovative strategy for the application of electrostatically spun nanofibers in flexible smart sensors.