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。