摩擦电纳米发电机(TENG)已被证明是一种用于废弃机械能和自供电系统的可持续能源利用方法。然而,摩擦层材料在潮湿环境中的电荷耗散严重限制了其稳定的能量供应。在这项工作中,报道了一种通过溶液共混聚偏氟乙烯-共-六氟丙烯(PVDF-HFP)和聚氯乙烯(PVC)制备聚合物膜作为疏水负摩擦材料的新方法,掺杂二氧化钛(TiO2)纳米颗粒,和进一步的表面图案化改性。由具有优化疏水性能(WCA=124°)的PVDF-HFP/PVC/TiO2复合膜组成的P-TENG实现了235V的输出电压和35μA的短路电流,这大约是基于PVDF-HFP的裸TENG的三倍。在电荷激励下,P-TENG的转移电荷可以达到35nC。当外部负载电阻为5.5MΩ时,输出峰值功率密度可达1.4Wm-2。同时,具有粗糙表面结构的疏水表面层使器件能够克服水分子在潮湿环境中对电荷转移的影响,迅速恢复,并保持高产量。P-TENG可以有效监测手指的灵活性和力量,并实现对老年人和康复训练者的运动状态和手部疲劳的实时评估。在自供电智能运动传感中具有广阔的应用前景,软机器人,人机交互,和其他领域。
Triboelectric nanogenerator (TENG) has been demonstrated as a sustainable energy utilization method for waste mechanical energy and self-powered system. However, the charge dissipation of frictional layer materials in a humid environment severely limits their stable energy supply. In this work, a new method is reported for preparing polymer film as a
hydrophobic negative friction material by solution blending poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and polyvinyl chloride (PVC), doping with titanium dioxide (TiO2) nanoparticles, and further surface patterning modification. The P-TENG composed of the PVDF-HFP/PVC/TiO2 composite film with optimized
hydrophobic performance (WCA = 124°) achieved an output voltage of 235 V and a short-circuit current of 35 μA, which is approximately three times that of the bare PVDF-HFP-based TENG. Under charge excitation, the transferred charge of the P-TENG can reach 35 nC. When the external load resistance is 5.5 MΩ, the output peak power density can reach 1.4 W m-2. Meanwhile, the
hydrophobic surface layer with a rough surface structure enables the device to overcome the influence of water molecules on charge transfer in a humid environment, quickly recover, and maintain a high output. The P-TENG can effectively monitor finger flexibility and strength and realize real-time evaluation of the exercise state and hand fatigue of the elderly and rehabilitation trainers. It has broad application prospects in self-powered intelligent motion sensing, soft robotics, human-machine interaction, and other fields.