Stretchable and transparent PVA/Borax organohydrogel-based triboelectric nanogenerator for self-powered wearables and human–machine interfaces

作者：Junwei Zhao, Ze Wan, Yifan Wang, Jian Chen, Chun‐Li Hou, Yujiang Wang · 发表于：Nanoscale · 年份：2025 · DOI：10.1039/d5nr03778f · 被引用次数：4 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Conducting polymers and applications、Dielectric materials and actuators

cross-linking of poly(vinyl alcohol) (PVA) and borax. The electrical conductivity of the PVA/borax organohydrogel can be tuned over a broad range simply by adjusting the borax concentration. The prepared organohydrogel can be utilized as a resistance sensor to monitor human motions. A single-electrode TENG was developed by employing the PVA/borax organohydrogel as an electrode and silicone rubber as a triboelectric layer. An optimally formulated organohydrogel-based TENG (OH-TENG) delivers a peak-to-peak voltage of approximately 500 V, a short-circuit current of 3.0 µA, and a transferred charge of 145 nC under a 3.0 Hz mechanical excitation. Demonstrations show that the device rapidly charges an electrolytic capacitor, effortlessly illuminates a string of green LEDs, and powers portable electronics. When interfaced with Darlington transistors and relay modules, the OH-TENG can reliably switch external circuits on and off. It has also been integrated with a Bluetooth oscilloscope module, enabling real-time monitoring of human movements. These results highlight its potential applications in human-machine interfaces and safety systems. This study elucidates how organohydrogel properties govern the performance of OH-TENGs and provides a general blueprint for designing next-generation, highly stretchable TENGs.