Flexible electronic devices, soft robots, personalized e-health services and soft and conductive materials for the human-computer interactions have become important technologies [1-2]. In recent years, there has been a significant increase in studies on the use of soft and flexible hydrogel-based strain sensors for e-health technology, in which human movements are monitored[3-4]. The biggest limitation of hydrogel-based wearable sensors is the loss of signal detection and stability due to freezing or evaporation of the water they contain under different climatic conditions. At this point, the development of ionogel systems prepared by using deep eutectic solvent (DES) has gained importance in wearable sensor applications[5]. Based on this motivation, we have produced a new composite DES-based ionogel system to monitor human movements in a wide range of climatic conditions. In this presentation, we will present the fabrication process of this hydrogel-based strain sensor and its performance in monitoring small and large human movements. The results of our investigation indicate that flexible DES-based ionogel strain sensors will play a significant role in the domain of future sensing technologies.

Acknowledgment: This research was funded by the Scientific and Technological Research Council of Türkiye (TUBITAK) (grant no: 223Z170).

References:
[1]He, Y., Xu, X., Xiao, S., Wu, J., Zhou, P., Chen, L., & Liu, H. (2024). Research progress and application of multimodal flexible sensors for electronic skin. ACS sensors, 9(5), 2275-2293.
[2] Yang, T., Xie, D., Li, Z., & Zhu, H. (2017). Recent advances in wearable tactile sensors: Materials, sensing mechanisms, and device performance. Materials Science and Engineering: R: Reports, 115, 1-37.
[3] Gao, Z., Bi, M., Jin, Z., Sun, J., Gao, H., & Gao, G. (2023). Ultra-adhesive poly (acrylic acid)-based hydrogel as a flexible sensor for capturing human-motion signal. ACS Applied Polymer Materials, 5(3), 1926-1936.
[4] Wang, Y., Zhu, P., Tan, M., Niu, M., Liang, S., & Mao, Y. (2023). Recent Advances in Hydrogel Based Self Powered Artificial Skins for Human–Machine Interfaces. Advanced Intelligent Systems, 5(9), 2300162.
[5] Cui, Q., Huang, X., Dong, X., Zhao, H., Liu, X., & Zhang, X. (2022). Self-healing bimodal sensors based on bioderived polymerizable deep eutectic solvent ionic elastomers. Chemistry of Materials, 34(23), 10778-10788.

Esin Akbay Cetin

Appearances