Jiangxi Province Key Laboratory of Flexible Electronics, Jiangxi Science and Technology Normal University, Nanchang Jiaotong Institute, Nanchang 330013, Jiangxi, PR China.
Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, Liaoning, PR China.
Int J Biol Macromol. 2024 Nov;281(Pt 4):136581. doi: 10.1016/j.ijbiomac.2024.136581. Epub 2024 Oct 14.
A strain sensor stands as an indispensable tool for capturing intricate motions in various applications, ranging from human motion monitoring to electronic skin and soft robotics. However, existing strain sensors still face difficulties in simultaneously achieving superior sensing performance sufficing for practical applications like high stretchability and low hysteresis, as well as seamless device fabrication like desirable interfacial adhesion and system-level integration. Herein, we develop a highly stretchable and low-hysteresis strain sensor with adhesive poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)/polyacrylamide (PAAm)-sodium alginate (SA) composite hydrogel, allowing the successful construction of a wireless motion capture sensing system that can provide precise data collection within a large deformation range. The resultant composite hydrogel displays favorable interfacial adhesion and robust mechanical stability, and the fabricated strain sensor demonstrates a wide working strain range (up to 500%) with high sensitivity (gauge factor = 11) and ultra-low hysteresis (1.52%), outperforming previous PEDOT-based hydrogel strain sensors. Enabled by the intriguing material properties and high sensing performance, we further demonstrate the fabrication and integration of a wireless motion capture sensing system for diverse applications like human motion monitoring, gesture recognition, and interactive communication.
应变传感器是捕捉各种应用中复杂运动的不可或缺的工具，从人体运动监测到电子皮肤和软机器人等。然而，现有的应变传感器在同时实现卓越的传感性能方面仍然存在困难，这些性能对于实际应用（如高拉伸性和低滞后性）以及无缝的器件制造（如理想的界面附着力和系统级集成）都是必需的。在这里，我们开发了一种具有高拉伸性和低滞后性的应变传感器，其采用了具有粘附性的聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）/聚丙烯酰胺（PAAm）-海藻酸钠（SA）复合水凝胶，从而成功构建了一个无线运动捕捉传感系统，该系统可以在大变形范围内提供精确的数据采集。所得到的复合水凝胶具有良好的界面附着力和强大的机械稳定性，所制造的应变传感器具有很宽的工作应变范围（高达 500%）、高灵敏度（应变系数=11）和超低滞后性（1.52%），优于以前的基于 PEDOT 的水凝胶应变传感器。得益于引人入胜的材料特性和高传感性能，我们进一步展示了用于各种应用的无线运动捕捉传感系统的制造和集成，例如人体运动监测、手势识别和交互式通信。
