Wang Siyu, Xia Dawei, Xu Xinyu, Song Haoyang, Qing Yongquan
Shenyang Fire Science and Technology Research Institute of MEM, Shenyang 110034, China.
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
Materials (Basel). 2024 Sep 13;17(18):4499. doi: 10.3390/ma17184499.
Superhydrophobic strain sensors are highly promising for human motion and health monitoring in wet environments. However, the introduction of superhydrophobicity inevitably alters the mechanical and conductive properties of these sensors, affecting sensing performance and limiting behavior monitoring. Here, we developed an alkylated MXene-carbon nanotube/microfiber composite material (AMNCM) that is simultaneously flexible, superhydrophobic, and senses properties. Comprising a commercially available fabric substrate that is coated with a functional network of alkylated MXene/multi-walled carbon nanotubes and epoxy-silicone oligomers, the AMNCM offers high mechanical and chemical robustness, maintaining high conductivity and strain sensing properties. Furthermore, the AMNCM strain sensor achieves a gauge factor of up to 51.68 within a strain range of 80-100%, and exhibits rapid response times (125 ms) and long-term stability under cyclic stretching, while also displaying superior direct/indirect anti-fouling capabilities. These properties position the AMNCM as a promising candidate for next-generation wearable devices designed for advanced environmental interactions and human activity monitoring.
超疏水应变传感器在潮湿环境中的人体运动和健康监测方面极具潜力。然而，超疏水性的引入不可避免地改变了这些传感器的机械和导电性能，影响传感性能并限制行为监测。在此，我们开发了一种烷基化的MXene-碳纳米管/微纤维复合材料（AMNCM），它同时具有柔韧性、超疏水性和传感性能。AMNCM由涂覆有烷基化MXene/多壁碳纳米管和环氧硅氧烷低聚物功能网络的市售织物基材组成，具有高机械和化学稳定性，保持高导电性和应变传感性能。此外，AMNCM应变传感器在80-100%的应变范围内实现了高达51.68的应变系数，在循环拉伸下表现出快速响应时间（125毫秒）和长期稳定性，同时还展现出优异的直接/间接防污能力。这些特性使AMNCM成为设计用于先进环境交互和人体活动监测的下一代可穿戴设备的有前途的候选材料。
