1. Stretchable Triboelectric Self‐Powered Sweat Sensor Fabricated from Self‐Healing Nanocellulose Hydrogels.
- Author
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Qin, Ying, Mo, Jilong, Liu, Yanhua, Zhang, Song, Wang, Jinlong, Fu, Qiu, Wang, Shuangfei, and Nie, Shuangxi
- Subjects
TRIBOELECTRICITY ,PERSPIRATION ,HYDROGELS ,POLYANILINES ,POLYVINYL alcohol ,DETECTORS ,POWER resources - Abstract
Though visualizing perspiration constituents is crucial for physiological evaluation, inadequate material healing and unreliable power supply methods restrict its applications. Herein, a fully flexible self‐powered sweat sensor is fabricated from a cellulose‐based conductive hydrogel to address these issues. The hydrogel electrode is composed of a cellulose nanocomposite polymerized in situ with polyaniline and cross‐linked with polyvinyl alcohol/borax. The cellulose nanocomposites furnish the sweat sensor with tensile and electrical self‐healing efficiencies exceeding 95% within 10 s, a stretchability of 1530%, and conductivity of 0.6 S m−1. The sweat sensor quantitatively analyzes Na+, K+, and Ca2+ contents in perspiration, to sensitivities of 0.039, 0.082, and 0.069 mmol–1, respectively, in real time via triboelectric effect and wirelessly transmits the results to a user interface. This fabricated sweat sensor with high flexibility, stability, and analytical sensitivity and selectivity provides new opportunities for self‐powered health monitoring. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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