Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China.
College of Textile and Clothing Engineering, Dezhou University, Dezhou 253023, China.
ACS Appl Mater Interfaces. 2020 Sep 23;12(38):42880-42890. doi: 10.1021/acsami.0c12709. Epub 2020 Sep 14.
A wearable and effective tribopositive material, especially an economical and eco-friendly triboelectric fabric developed from biomaterials, is highly crucial for the development of green wearable triboelectric nanogenerators. In this work, we design a porous nanocomposite fabric (PNF) with strong charge accumulation capacity through a facile dry-casting method and use it as a tribopositive material to construct attractive wearable triboelectric nanogenerators (abbreviated as TENGs). Specifically, the porous nanocomposite is developed by the incorporation of nano-AlO fillers into cellulose acetate networks. By adjusting the concentration of casting solution and the content of nano-AlO fillers, we systematically engineer the physical properties of the PNF for obtaining a large triboelectric charge yield. When a 10 wt % solution concentration and 10 wt % nanofiller content are adopted for the PNF, the corresponding PNF-TENG can deliver an electrical performance of ∼2.5 mW/cm on a 0.8 MΩ external resistor. This remarkable output can be ascribed to the synergistic effect between the appropriate porous network and improved dielectric properties of the nanocomposite. Moreover, the PNF-TENG also exhibits good reliable electrical outputs under multiple stain-washing measurements or after experiencing cyclical contact-separation 13,500 times. Also, the device is capable of charging various capacitors, lighting LED arrays, and driving commercial wrist watches and is proven to be an efficient and reliable green wearable power source. Furthermore, a PNF-TENG-based elbow supporter and a grip ball, as self-powered sensors, are proposed to realize real-time detection for human actions during sports exercise. This work proposes an eco-friendly nanocomposite fabric as an effective tribopositive material, verifies the feasibility of developing environmentally friendly wearable power sources and sensors, and provides new insights into the design of green wearable triboelectric nanogenerators.
一种可穿戴且高效的摩擦生电材料，特别是由生物材料开发的经济且环保的摩擦电织物，对于绿色可穿戴摩擦电纳米发电机的发展至关重要。在这项工作中，我们通过简便的干法浇铸法设计了一种具有强电荷积累能力的多孔纳米复合织物（PNF），并将其用作摩擦生电材料来构建有吸引力的可穿戴摩擦电纳米发电机（简称 TENG）。具体而言，多孔纳米复合材料是通过将纳米 AlO 填料掺入醋酸纤维素网络中开发的。通过调整铸膜液的浓度和纳米 AlO 填料的含量，我们系统地设计了 PNF 的物理性能，以获得较大的摩擦电荷输出。当采用 10wt%的溶液浓度和 10wt%的纳米填料含量时，相应的 PNF-TENG 可在 0.8MΩ外部电阻下提供约 2.5mW/cm 的电性能。这种显著的输出可归因于适当的多孔网络和纳米复合材料介电性能提高的协同效应。此外，PNF-TENG 在经过多次洗涤测量或经历循环接触分离 13500 次后仍能保持可靠的电输出。此外，该设备还能够为各种电容器充电、点亮 LED 阵列并驱动商用手表，被证明是一种高效可靠的绿色可穿戴电源。此外，我们还提出了基于 PNF-TENG 的肘部支撑器和握力球作为自供电传感器，以实现运动过程中人体动作的实时检测。这项工作提出了一种环保型纳米复合织物作为有效的摩擦生电材料，验证了开发环保型可穿戴电源和传感器的可行性，并为绿色可穿戴摩擦电纳米发电机的设计提供了新的思路。
