Abstract
The growth of flexible sensors has always been challenging since the sensing behavior, mechanic performance and fatigue resistance remain to be improved. In this paper, a wearable pressure sensor with fast response and high sensitivity based on ionogel/textile is fabricated. The ionogel is a double-network (DN) structure composed of polydimethylacrylamide (PDMAAm) skeleton and silica particles, carrying ionic liquids (ILs), which serves as a piezoresistive device. By impregnating and polymerization with the ionogel-prepolymer solution, a conventional cotton knitted fabric is converted into a conductive and piezoresistive composite. The fabric serves as a ductile supporting matrix for the ionogel, supplementing the piezoresistive contribution of the brittle silica network. This ionogel/textile composite has a high sensitivity (S=86.90 kPa−1) and durability, continuously outputting stable electric signal during monitoring the motion states of different joints in human body. Through the impregnation-polymerization approach, the selected areas toward to the specific joints positions in clothing can be fabricated into piezoresistive devices. The incorporation of textile improves the stress loading and sensing behavior of the ionogel to work steadily under the sole of the foot for gait monitoring. This ionogel/textile device provides a potential formula of wearable sensors, step** toward the burgeoning diversified-technologies assisted intelligence system.
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Acknowledgement
This work was supported by the National Key Research and Development Program of China (2017YFB0309800, 2016YFC0400503-02), the Natural Science Foundation of Tian**, China (15JCYBJC18000, 18JCYBJC89600), the **njiang Autonomous Region Major Significant Project Foundation (2016A03006-3), Science and Technology Guidance Project of China National Textile and Apparel Council (2017011), and Tian** Research Innovation Project for Postgraduate Students (2020YJSB073).
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Dong, Y., Li, Q., Zhao, Z. et al. A Wearable Pressure Sensor Based on Ionogel/Textile for Human Motion Monitoring. Fibers Polym 23, 2351–2363 (2022). https://doi.org/10.1007/s12221-022-4839-z
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DOI: https://doi.org/10.1007/s12221-022-4839-z