Thermogalvanic hydrogel-based e-skin for self-powered on-body dual-modal temperature and strain sensing  

作　　者：Zhaosu Wang Ning Li Xinru Yang Zhiyi Zhang Hulin Zhang Xiaojing Cui 

机构地区：[1]College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan,030024,China [2]College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan,030024,China [3]School of Physics and Information Engineering,Shanxi Normal University,Taiyuan,030031,China

出　　处：《Microsystems & Nanoengineering》2024年第2期293-302,共10页微系统与纳米工程（英文）

基　　金：supported by the Natural Science Foundation of Shanxi Province(20210302123190);the Special Project of Science and Technology Cooperation and Exchange of Shanxi Province(202104041101031).

摘　　要：Sensing of both temperature and strain is crucial for various diagnostic and therapeutic purposes.Here,we present a novel hydrogel-based electronic skin(e-skin)capable of dual-mode sensing of temperature and strain.The thermocouple ion selected for this study is the iodine/triiodide(I−/I3−)redox couple,which is a common component in everyday disinfectants.By leveraging the thermoelectric conversion in conjunction with the inherent piezoresistive effect of a gel electrolyte,self-powered sensing is achieved by utilizing the temperature difference between the human body and the external environment.The composite hydrogels synthesized from polyvinyl alcohol(PVA)monomers using a simple freeze‒thaw method exhibit remarkable flexibility,extensibility,and adaptability to human tissue.The incorporation of zwitterions further augments the resistance of the hydrogel to dehydration and low temperatures,allowing maintenance of more than 90%of its weight after 48 h in the air.Given its robust thermal current response,the hydrogel was encapsulated and then integrated onto various areas of the human body,including the cheeks,fingers,and elbows.Furthermore,the detection of the head-down state and the monitoring of foot movements demonstrate the promising application of the hydrogel in supervising the neck posture of sedentary office workers and the activity status.The successful demonstration of self-powered on-body temperature and strain sensing opens up new possibilities for wearable intelligent electronics and robotics.

关 键 词：HYDROGEL MODAL utilizing 

分 类 号：O63[理学—高分子化学]