Abstract：
Triboelectric nanogenerators (TENG) are promising alternatives for clean energy harvesting. However, the material utilization in the development of TENG relies majorly on polymers derived from non-renewable resources. Therefore, minimizing the carbon footprint associated with such TENG development demands a shift toward usage of sustainable materials. This study pioneers using natural rubber (NR) as a sustainable alternative in TENG development. Infusing graphene in NR, its dielectric constant and tribonegativity are optimized, yielding a remarkable enhancement. The optimized sample exhibits a dielectric constant of 411 (at 103 Hz) and a contact potential difference (CPD) value of 1.85 V. In contrast, the pristine NR sample showed values of 6 and 3.06 V for the dielectric constant and CPD. Simulation and experimental studies fine-tune the TENG\'s performance, demonstrating excellent agreement between theoretical predictions and practical studies. Sensors developed via stencil printing technique possess a remarkably low layer thickness of 270 µm, and boast a power density of 420 mW m-2, a staggering 250% increase over conventional NR. Moreover, the material is pressure sensitive, enabling precise real-time human motion detection, including finger contact, finger bending, neck bending, and arm bending. This versatile sensor offers wireless monitoring, empowering healthcare monitoring based on the Internet of Things.
摘要：
摩擦电纳米发电机（TENG）是清洁能源收集的有希望的替代品。然而,TENG开发中的材料利用主要依赖于来自不可再生资源的聚合物。因此,尽量减少与这种TENG开发相关的碳足迹需要转向使用可持续材料。本研究是在TENG开发中使用天然橡胶（NR）作为可持续替代品的先驱。在NR中注入石墨烯，对其介电常数和三角性进行了优化，产生显著的增强。优化样品的介电常数为411（在103Hz），接触电位差（CPD）值为1.85V。原始NR样品的介电常数和CPD值分别为6和3.06V。仿真和实验研究微调TENG的性能，证明了理论预测与实践研究之间的极好一致性。通过模版印刷技术开发的传感器具有270µm的非常低的层厚度，功率密度为420mWm-2，比传统NR增加了惊人的250%。此外，这种材料是压敏的，实现精确的实时人体运动检测，包括手指接触,手指弯曲,颈部弯曲,和手臂弯曲。这款多功能传感器提供无线监控，授权基于物联网的医疗监控。
