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Wearable pressure sensors based on antibacterial and porous chitosan hydrogels for full-range human motion detection

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Science China Technological Sciences 2024年第8期67卷 2475-2484页

作者： ZHANG YingXin LIU HanGuang JIN ShunYu LI YaJuan ZHANG Wan ZHOU Hang NIE ZanXiang HUANG Yuan School of Microelectronics Science and Technology Sun Yat-sen University Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Department of Clinical Laboratory the First Affiliated Hospital of Anhui Medical University School of Electronic and Computer Engineering Peking University Shenzhen Graduate School Zinergy Shenzhen Ltd.

Wearable pressure sensors made from conductive hydrogels hold significant potential in health monitoring. However, limited pressure range（Pa to hundreds of kPa） and inadequate antibacterial properties restrict their practical applications in diagnostic and health evaluation. Herein, a wearable high-performance pressure sensor was assembled using a facilely prepared porous chitosan-based hydrogel, which was constructed from commercial phenolphthalein particles as a sacrificial template. The relationship between the porosity of hydrogels and sensing performance of sensors was systematically explored. Herein, the wearable pressure sensor, featuring an optimized porosity of hydrogels, exhibits an ultrawide sensing capacity from 4.83 Pa to 250 k Pa（range-to-limit ratio of 51,760） and high sensitivity throughout high pressure ranges(0.7 kPa-1, 120–250 kPa). The presence of chitosan endows these hydrogels with outstanding antibacterial performance against E. coli and S. aureus, making them ideal candidates for use in wearable electronics. These features allow for a practical approach to monitor full-range human motion using a single device with a simple structure.

关键词： porous hydrogels antibacterial performances wearable pressure sensors full-range human motion chitosan

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