Journal
CHEMICAL ENGINEERING JOURNAL
Volume 458, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2023.141370
Keywords
Liquid metal; MXene; Ionic gel; Mechanical properties; High-sensitivity; Strain sensor
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In this study, MXene and liquid metal (LM) are used to form a spring structure in ionic gels, improving their mechanical properties and self-healing efficiency. The conductive paths based on double fillers are greatly destroyed during the straining process, leading to a high gauge factor. This study provides a new approach for the preparation of highly sensitive sensing materials for human body monitoring and applications in other domains.
Conductive ionic gels are considered as potential flexible sensing materials owing to their softness and biocompatibility. Nevertheless, pure ionic gels typically exhibit poor mechanical properties and low sensitivity. In this study, MXene and liquid metal (LM) are introduced for self-assembly to form a spring structure. The enhanced effect of the van der Waals force synergy between the two fillers increases the tensile resistance (925 %, 1091.5 kPa), compression resistance (75 %, 2534.3 kPa) and self-healing (similar to 90 % recovery) efficiency of the ionic gel. In addition, the conductive paths based on double fillers are greatly destroyed during the straining process, and show a very high gauge factor (15.47) because of their unique spring structure and weak viscous force between them. This study provides a new approach for the preparation of highly sensitive sensing materials for human body monitoring and applications in other domains.
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