Bi Siyi, Hou Lei, Dong Wangwei, Lu Yinxiang
Department of Materials Science, Fudan University, Shanghai 200433, China.
Andrew and Peggy Cherng Department of Medical Engineering, California Institute of Technology, Pasadena, California 91125, United States.
ACS Appl Mater Interfaces. 2021 Jan 13;13(1):2100-2109. doi: 10.1021/acsami.0c21075. Epub 2020 Dec 21.
Sensitive and flexible sensors capable of monitoring physiological signals of human body for healthcare have been developed in recent years. It is still a challenge to fabricate a wearable sensor-integrated multifunctional performances and a good fit to human body. Here, an rGO and pen ink/PVA-layered strain-humidity sensor based on MS fabric is prepared through a cost-effective and scalable solution process. The conductive fabric as a strain sensor has a workable strain range (∼300%), ultrahigh sensitivity (maximum gauge factor of 492.8), great comfort, and long-term stability. Notably, a step increase in relative resistance variation will be achieved by controlling the coverage of an ink layer. Moreover, the reliable linear humidity-dependent resistance void of hysteresis and excellent repeatability renders conductive fabrics an opportunity as humidity sensors. Based on these superior multifunctions, the resultant conductive fabric can be applied to detect both human motions and skin humidity, showing potential in applications of wearable electronics for professional athletes.
近年来，已经开发出能够监测人体生理信号以用于医疗保健的灵敏且灵活的传感器。制造具有集成多功能且能很好贴合人体的可穿戴传感器仍然是一项挑战。在此，通过一种经济高效且可扩展的溶液法制备了一种基于MS织物的rGO与笔墨水/PVA分层应变 - 湿度传感器。作为应变传感器的导电织物具有可行的应变范围（约300%）、超高灵敏度（最大应变系数为492.8）、极佳的舒适性和长期稳定性。值得注意的是，通过控制墨水层的覆盖率可实现相对电阻变化的阶跃增加。此外，可靠的与湿度相关的线性电阻、无滞后现象以及出色的重复性使导电织物有机会用作湿度传感器。基于这些卓越的多功能特性，所得导电织物可用于检测人体运动和皮肤湿度，在职业运动员可穿戴电子产品应用中显示出潜力。
