Piezoelectric enhancement of an electrospun AlN-doped P(VDF-TrFE) nanofiber membrane. (11th June 2021)

• Record Type: Journal Article
• Authors: Yang, Jiang; Xu, Fan; Jiang, Hanxiao; Wang, Conghuan; Li, Xingjia; Zhang, Xiuli; Zhu, Guodong
• Is Part Of: Materials chemistry frontiers. Volume 5:Number 15(2021)
• Page Start: 5679
• Page End: 5688
• Publication Date: 2021-06-11
• Subjects: Materials science -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1039/d1qm00550b
• Languages: English
• ISSNs: 2052-1529

Abstract

Abstract : A small amount of AlN doping induced a large piezoelectric enhancement of electrospun piezoelectric polymer nanofibers. A device was developed for mechanical energy harvesting and sensing of pulse, finger bending and multipoint recognition. Abstract : Piezoelectric materials are well known for their applications in self-powered sensing and mechanical energy harvesting. With the development of the Internet of things and wearable electronics, piezoelectric polymers are attracting more attention due to their advantages of flexibility, ease of fabrication and biocompatibility. However, low piezoelectric properties weaken their electrical response to external excitation. Doping is one convenient measure to improve their piezoelectric properties. Here we reported AlN-doping-induced piezoelectric enhancement in electrospun poly(vinylidene fluoride-trifluoroethylene) nanofiber membranes. Piezoelectric property measurements under both perpendicular and transverse modes verified that a limited AlN doping of 0.1 wt% could effectively enhance the piezoelectric responses of P(VDF-TrFE)/AlN nanocomposite membranes. Based on such optimized nanofiber membranes, flexible and wearable piezoelectric sensors were further designed to detect finger movement, wrist artery pulse and multi-touch recognition. Our work provided a facile measure to fabricate high-electroactivity nanocomposite membranes for sensing applications in wearable and flexible electronics.