Flexible pressure sensor based on a poly(VDF-TrFE) nanofiber web

Abstract

During electrospinning, P(VDF-TrFE), an electroactive polymer, acquires special electrical and mechanical properties. The development of a flexible, breathable pressure sensor based on P(VDF-TrFE) nanofiber webs is reported that shows promise for use in human-centered applications. The P(VDF-TrFE) nanofiber webs are produced by electrospinning. The morphology and microstructure of webs are characterized using SEM, XRD, and ATR-FTIR spectroscopy. Flexible pressure sensors are developed that are suitable for incorporation into fabrics and, using a custom-made setup, is is demonstrated that they have a maximum sensitivity of 60.5 mV · N-1. A high-performance flexible mechanical sensor made from piezoelectric P(VDF-TrFE) polymer nanofibers is described that shows a high sensitivity up to 60.5 mV · N-1. This sensitivity is comparable to that of pure PVDF film. The sensor responds synchronously to an external dynamic force up to 20 Hz and may be used in human-related devices for health monitoring and medical treatment. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.