School of Textile and Clothing, Jiangnan University, Wuxi, 214122, China.
Provincial Key Laboratory of Functional Textile Materials, Zhongyuan University of Technology, Zhengzhou, 450007, China.
Sci Rep. 2017 Oct 11;7(1):12949. doi: 10.1038/s41598-017-13281-8.
The wearable electronic skin with high sensitivity and self-power has shown increasing prospects for applications such as human health monitoring, robotic skin, and intelligent electronic products. In this work, we introduced and demonstrated a design of highly sensitive, self-powered, and wearable electronic skin based on a pressure-sensitive nanofiber woven fabric sensor fabricated by weaving PVDF electrospun yarns of nanofibers coated with PEDOT. Particularly, the nanofiber woven fabric sensor with multi-leveled hierarchical structure, which significantly induced the change in contact area under ultra-low load, showed combined superiority of high sensitivity (18.376 kPa, at ~100 Pa), wide pressure range (0.002-10 kPa), fast response time (15 ms) and better durability (7500 cycles). More importantly, an open-circuit voltage signal of the PPNWF pressure sensor was obtained through applying periodic pressure of 10 kPa, and the output open-circuit voltage exhibited a distinct switching behavior to the applied pressure, indicating the wearable nanofiber woven fabric sensor could be self-powered under an applied pressure. Furthermore, we demonstrated the potential application of this wearable nanofiber woven fabric sensor in electronic skin for health monitoring, human motion detection, and muscle tremor detection.
具有高灵敏度和自供电功能的可穿戴电子皮肤在人体健康监测、机器人皮肤和智能电子产品等应用中显示出越来越大的前景。在这项工作中，我们介绍并展示了一种基于由涂有 PEDOT 的 PVDF 静电纺纳米纤维纱线编织而成的压敏纳米纤维编织织物传感器的高灵敏度、自供电和可穿戴电子皮肤的设计。特别地，具有多层次分级结构的纳米纤维编织织物传感器显著诱导超低负载下接触面积的变化，显示出高灵敏度（在~100 Pa 时为 18.376 kPa）、宽压力范围（0.002-10 kPa）、快速响应时间（15 ms）和更好的耐用性（7500 次循环）的综合优势。更重要的是，通过施加 10 kPa 的周期性压力，获得了 PPNWF 压力传感器的开路电压信号，并且输出开路电压表现出对所施加压力的明显开关行为，表明在施加压力下可穿戴纳米纤维编织织物传感器可以自供电。此外，我们展示了这种可穿戴纳米纤维编织织物传感器在电子皮肤中的健康监测、人体运动检测和肌肉震颤检测方面的潜在应用。
