Superhydrophobic MXene-CNT Bridge Strain Sensors with Wide Linear-Range via Strain-isolation and Crack-synergy Effects

被引：0
|
作者：
Jin, Qin [1 ]
Liu, Zhizhe [1 ,2 ]
Ouyang, Xiaoping [1 ,2 ]
Liu, Yangchengyi [1 ]
Wang, Xiufeng [1 ]
机构：
[1] School of Materials Science and Engineering, Xiangtan University, Hunan, Xiangtan,411105, China
[2] College of Mechanical and Vehicle Engineering, Hunan University, Hunan, Changsha,410082, China
来源：
Chemical Engineering Journal | 1600年 / 488卷
基金：
中国国家自然科学基金;
关键词：
Despite the high sensitivity of crack-based strain sensors; extending their linear range remains challenging. Additionally; maintaining inherent superhydrophobicity is crucial for their effective operation in complex hydrated scenarios. In this study; we introduce a superhydrophobic MXene-CNT bridge (MCB) strain sensor that utilizes multi-structural strategies to modulate crack propagation. The MCB sensor leverages the strain isolation effect of the bridge structure to reduce excessive stress concentration from existing cracks in the substrate; leading to a more gradual redistribution of cracks in the conductive layer; thus ensuring its sensitivity and stretchability. Furthermore; the sensor capitalizes on the crack-synergy effects of the dual conductive layers to achieve a wide linear range: a MXene film for slight deformations and a superhydrophobic CNT-Ecoflex composite for significant ones. The fabricated MCB sensor showcases its ability to monitor electrophysiological signals and capture body motion; even in underwater conditions. The suggested multi-structural strategies provide a straightforward method for fabricating sensors that capture human physiological signatures in aquatic settings. © 2024 Elsevier B.V;
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