Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
Nano Lett. 2024 Jun 12;24(23):7125-7133. doi: 10.1021/acs.nanolett.4c01962. Epub 2024 May 29.
Wearable sensors are experiencing vibrant growth in the fields of health monitoring systems and human motion detection, with comfort becoming a significant research direction for wearable sensing devices. However, the weak moisture-wicking capability of sensor materials leads to liquid retention, severely restricting the comfort of the wearable sensors. This study employs a pattern-guided alignment strategy to construct microhill arrays, endowing triboelectric materials with directional moisture-wicking capability. Within 2.25 s, triboelectric materials can quickly and directionally remove the droplets, driven by the Laplace pressure differences and the wettability gradient. The directional moisture-wicking triboelectric materials exhibit excellent pressure sensing performance, enabling rapid response/recovery (29.1/37.0 ms), thereby achieving real-time online monitoring of human respiration and movement states. This work addresses the long-standing challenge of insufficient moisture-wicking driving force in flexible electronic sensing materials, holding significant implications for enhancing the comfort and application potential of electronic skin and wearable electronic devices.
可穿戴传感器在健康监测系统和人体运动检测领域正在蓬勃发展，舒适性成为可穿戴传感设备的一个重要研究方向。然而，传感器材料吸湿能力弱导致液体滞留，严重限制了可穿戴传感器的舒适性。本研究采用图案引导对齐策略构建微山阵列，赋予摩擦电材料定向吸湿能力。在 2.25 秒内，摩擦电材料在拉普拉斯压差和润湿性梯度的驱动下，可以快速、定向地去除液滴。定向吸湿摩擦电材料具有优异的压力传感性能，能够快速响应/恢复（29.1/37.0 ms），从而实现人体呼吸和运动状态的实时在线监测。这项工作解决了柔性电子传感材料中吸湿驱动力不足的长期挑战，对提高电子皮肤和可穿戴电子设备的舒适性和应用潜力具有重要意义。
