Wang Shanping, Wan Haicheng, Lv Yu, Wang Peng, Meng Chuizhou
School of Electrical Engineering, Shandong Huayu University of Technology, Dezhou 253000, China.
State Key Laboratory for Reliability and Intelligence of Electrical Equipment, Engineering Research Center of Ministry of Education for Intelligent Rehabilitation Device and Detection Technology, Hebei Key Laboratory of Smart Sensing and Human-Robot Interaction, School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China.
ACS Appl Mater Interfaces. 2025 Apr 9;17(14):21491-21500. doi: 10.1021/acsami.5c02417. Epub 2025 Apr 1.
Flexible noncontact sensors are of great significance in contemporary applications. Nevertheless, conventional noncontact sensors that rely on metal electrodes have limited flexibility, and their multilayer architectures are likely to experience interfacial delamination during extended use. To tackle these problems, we introduce an all-gel-based flexible triboelectric noncontact sensor, which consists of two parts, i.e., the gelatin/poly(vinyl alcohol) (PVA)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/graphene (G) electrode hydrogel and PVA/cellulose/carbon nanotubes (CNT) triboelectric aerogel. The hydrogel electrode not only features outstanding biocompatibility but also exhibits high conductivity. The triboelectric aerogel demonstrates excellent mechanical properties, such as good elasticity and durability. This sensor can stably output a noncontact current of 1.18 μA, a charge of 18.4 nC/cm, and a voltage of 3.7 V at a stable state. It can accurately and reliably detect a wide range of human motions, such as elbow bending, knee movement, and running, providing a reliable and flexible approach for human motion perception and facilitating the progress of relevant fields.
柔性非接触式传感器在当代应用中具有重要意义。然而，传统的依赖金属电极的非接触式传感器柔韧性有限，其多层结构在长期使用过程中可能会出现界面分层。为了解决这些问题，我们引入了一种全凝胶基柔性摩擦电非接触式传感器，它由两部分组成，即明胶/聚乙烯醇（PVA）/聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）/石墨烯（G）电极水凝胶和PVA/纤维素/碳纳米管（CNT）摩擦电气凝胶。水凝胶电极不仅具有出色的生物相容性，还具有高导电性。摩擦电气凝胶表现出优异的机械性能，如良好的弹性和耐久性。该传感器在稳定状态下可稳定输出1.18 μA的非接触电流、18.4 nC/cm的电荷和3.7 V的电压。它能够准确可靠地检测各种人体运动，如肘部弯曲、膝盖运动和跑步，为人体运动感知提供了一种可靠且灵活的方法，并推动了相关领域的发展。
