Design of flexible nano pressure sensor based on BiCl3/P(VDF-TrFE) composite film and application in force sensing flexible keyboard

被引：0
|
作者：
Luo Y. [1 ]
Liao H. [1 ]
Zhao Z. [2 ]
Wang J. [3 ]
Wu Y. [4 ]
机构：
[1] School of Electronic Information, Hangzhou Dianzi University, Hangzhou
[2] School of Cyberspace Security, Hangzhou Dianzi University, Hangzhou
[3] Microelectronics Research Institute, Hangzhou Dianzi University, Hangzhou
[4] Academic Affairs Office, Hangzhou Dianzi University, Hangzhou
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 10期
关键词：
BiCl[!sub]3[!/sub; electrospinning; flexible sensor; force sensing keyboard; P(VDF-TrFE);
D O I：
10.13801/j.cnki.fhclxb.20230117.006
中图分类号：
学科分类号：
摘要：
The organic piezoelectric sensor prepared by electrospinning is better flexibility, light weight and breath-ability than the traditional pressure sensor, which has attracted much attention in the field of wearable sensor research. In this paper, a method of preparing BiCl3/poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) composite film by electrospinning was proposed, and the flexible piezoelectric sensor was designed and prepared with the composite film as the functional layer. After a certain amount of BiCl3 is added, the scanning electron microscope analysis shows that the average diameter of the fiber increases from 619 nm to 1 158 nm, and the surface becomes smoother. The X-ray diffraction pattern confirms that β phase content of the composite film has been significantly improved. The piezoelectric response testing results show that the open circuit peak-to-peak voltage (Voc) and short-circuit current (Isc) of P(VDF-TrFE) composite films with 2wt%BiCl3 are 16.8 V and 164 nA. Compared with pure P(VDF-TrFE) piezoelectric film, it is obviously improved 2.15 and 2.24 times. The pressure sensing testing results show that the piezoelectric film is good linear output characteristics under the pressure of 1.28 N. A flexible wearable force sensing keyboard was designed with this film, which could collect fingers pressing force and duration time. And it provides a reference solution on smart fabrics such as flexible keyboard applications. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：5750 / 5759
页数：9
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