Fully biodegradable water-soluble triboelectric nanogenerator for human physiological monitoring. (March 2022)

• Record Type: Journal Article
• Authors: Wang, Tao; Li, Shuyao; Tao, Xingling; Yan, Qi; Wang, Xingling; Chen, Yao; Huang, Fengjiao; Li, Hexing; Chen, Xiangyu; Bian, Zhenfeng
• Is Part Of: Nano energy. Volume 93(2022)
• Publication Date: 2022-03
• Subjects: Triboelectric nanogenerator -- Water-soluble -- Cellulose nanocrystal -- Biodegradable -- Recycled papers -- Bandage sensor; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2021.106787
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: The biodegradable triboelectric nanogenerators (TENGs) for monitoring human physiological signals have attracted immensely attention in recent years. In this work, a water-soluble TENG (WS-TENG) is manufactured by using biodegradable recycled papers and water-soluble graphite electrode. The cellulose nanocrystal (CNC) in the papers is extracted and further mixed with methylcellulose (MC) to form a CNC/MC film, which can serve as the positive electrification material and form a TENG device with the common MC film as the negative electrification material. This low-cost, light weight and biodegradable WS-TENG that can be directly washed away by water is developed as a bandage sensor. Unlike traditional gauze sensors, the water-insoluble parts of our cellulose-based can be easily separated from water for reuse. The variation of the output voltage of WS-TENG between 0 V and 2 V can accurately distinguish various respiratory states, which is enough to be used as a real-time physiological signal monitoring sensor. This fully water-soluble device can serve as an advanced medical sensor and expand the application of TENG in health care monitoring field. Graphical Abstract: ga1 Highlights: It is proposed for the first time to recycle paper-based materials for a fully biodegradable water-soluble WS-TENG. The CNC/MC film has excellent triboelectric properties and can be completely degraded in the natural environment. WS-TENG can serve as a bandage sensor for real-time monitoring human respiration and physiological signals.