Vu Duy-Linh, Ahn Kyoung-Kwan
Fluid Power and Machine Intelligence (FPMI) Laboratory, School of Mechanical Engineering, University of Ulsan, 93, Daehak-ro, Nam-gu, Ulsan 44610, Korea.
Polymers (Basel). 2022 Apr 11;14(8):1547. doi: 10.3390/polym14081547.
Produced by magnetic material dispersed in a viscous environment for the purpose of collecting and converting energy, magnetic rheological compounds greatly strengthen the development of skin-attachable and wearable electrical equipment. Given that magnetic nanomaterial anisotropy has a substantial influence on the interface polarizing of polyvinylidene fluoride (PVDF), it is critical to explore the function of magnetic polymer compounds in the triboelectric layer of triboelectric nanogenerator (TENG) output power. In this study, ferromagnetic cobalt ferrite, CoFeO (CFO), nanoparticles, and PVDF were employed to create a triboelectric composite membrane to improve TENG energy output. The content of β phase in PVDF increased significantly from 51.2% of pure PVDF membrane to 77.7% of 5 wt% CFO nanoparticles in the PVDF matrix, which further increase the dielectric constant and negative charge of the membrane. As a consequence, the energy output of CFO/PVDF-5 TENG increased significantly with a voltage of 17.2 V, a current of 2.27 μA, and a power density of 90.3 mW/m, which is 2.4 times the performance of pure PVDF TENG. Finally, the proposal for TENG hopes that its extraordinary stability and durability will provide additional views on hydrodynamic power generation in the future.
磁流变复合材料由分散在粘性环境中的磁性材料制成，用于收集和转换能量，极大地推动了可附着在皮肤和可穿戴电子设备的发展。鉴于磁性纳米材料的各向异性对聚偏氟乙烯（PVDF）的界面极化有重大影响，探索磁性聚合物复合材料在摩擦纳米发电机（TENG）输出功率的摩擦电层中的作用至关重要。在本研究中，采用铁磁钴铁氧体（CoFeO，CFO）纳米颗粒和PVDF制备了一种摩擦电复合膜，以提高TENG的能量输出。PVDF中β相的含量从纯PVDF膜的51.2%显著增加到PVDF基体中5 wt% CFO纳米颗粒的77.7%，这进一步提高了膜的介电常数和负电荷。因此，CFO/PVDF-5 TENG的能量输出显著增加，电压为17.2 V，电流为2.27 μA，功率密度为90.3 mW/m，是纯PVDF TENG性能的2.4倍。最后，对TENG的提议希望其非凡的稳定性和耐久性将为未来的流体动力发电提供更多见解。
