High strength, self-healing sensitive ionogel sensor based on MXene/ionic liquid synergistic conductive network for human-motion detection
文献信息
Xiao Wen, Zhipeng Deng, Hui Wang, Jianyang Shi, Shuang Wang, Haibo Wang, Yueming Song, Zongliang Du, Jinghong Qiu, Xu Cheng
Ionogels with both high strength and high conductivity for wearable strain and pressure dual-mode sensors are needed for human motion and health monitoring. Here, multiple hydrogen bonds are introduced through imidazolidinyl urea (IU) as a chain extender to provide high mechanical and self-healing properties for the water–borne polyurethane (WPU). The MXene/ionic liquids synergistic conductive network provides excellent conductivity and also reduces the relative content of ionic liquids to maintain the mechanical properties of the ionogels. The mechanical strength of this ionogel reached 1.81–2.24 MPa and elongation at break reached 570–624%. It also has excellent conductivity (22.7–37.5 mS m−1), gauge factor (GF) (as a strain sensor, GF = 1.8), sensitivity (S) (as a press sensor, S1 = 29.8 kPa−1, S2 = 1.3 kPa−1), and fast response time (as a strain sensor = 185 ms; as a press sensor = 204 ms). The ionogel also exhibits rapid photothermal self-healing capabilities due to the inherent photothermal behavior of MXene. It can maintain good elasticity and conductivity at low temperatures. In addition, this ionogel is able to stretch for 1200 cycles without significant change in the relative change of resistance. The ionogel can be assembled as a strain sensor for monitoring human motion and as a pressure sensor array for obtaining pressure magnitude and position information.
期刊推荐

Israel Journal of Chemistry

Proceedings of the National Academy of Sciences of the United States of America

Journal of Organometallic Chemistry

Molecular Pharmacology

Pharmacological Reviews

Helvetica Chimica Acta

Kinetics and Catalysis

Science

Journal of Physics and Chemistry of Solids

Journal of Heterocyclic Chemistry
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Journal of Materials Chemistry B

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