High Linearity,Low Hysteresis Ti3C2Tx MXene/AgNW/Liquid Metal Self-Healing Strain Sensor Modulated by Dynamic Disulfide and Hydrogen Bonds |
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| Authors: | Yanli Wang Wenjing Qin Min Yang Zhenhao Tian Wenjin Guo Jinkun Sun Xiang Zhou Bin Fei Baigang An Ruimin Sun Shougen Yin Zunfeng Liu |
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| Institution: | 1. School of Materials Science and Engineering, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education and Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin, 300384 China;2. State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and College of Chemistry, Key Laboratory of Functional Polymer Materials, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071 China;3. Institute of Textiles and 4. Clothing, The Hong Kong Polytechnic University, Hong Kong, 999077 China;5. School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051 China;6. Research Center of Functional Materials, Kaifeng University, Kaifeng, Henan, 475004 China |
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| Abstract: | Flexible wearable strain sensors have received extensive attention in human–computer interaction, soft robotics, and human health monitoring. Despite significant efforts in developing stretchable electronic materials and structures, developing flexible strain sensors with stable interfaces and low hysteresis remains a challenge. Herein, Ti3C2Tx MXene/AgNWs/liquid metal strain sensors (MAL strain sensor) with self-healing function are developed by exploiting the strong interactions between Ti3C2Tx MXene/AgNWs/LM and the disulfide and hydrogen bonds inside the self-healing poly(dimethylsiloxane) elastomers. AgNWs lap the Ti3C2Tx MXene sheets, and the LM acts as a bridge to increase the lap between Ti3C2Tx MXene and AgNWs, thereby improving the interface interaction between them and reducing hysteresis. The MAL strain sensor can simultaneously achieve high sensitivity (gauge factor for up to 3.22), high linearity (R2 = 0.98157), a wide range of detection (e.g., 1%–300%), a fast response time (145 ms), excellent repeatability, and stability.In addition, the MAL strain sensor before and after self-healing is combined with a small fish and an electrothermally driven soft robot, respectively, allowing real-time monitoring of the swinging tail of the small fish and the crawling of the soft robot by resistance changes. |
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| Keywords: | artificial muscles buckled structures liquid metals low hysteresis self-healing soft robotics Ti3C2Tx MXene |
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