Research Institute for Soft Matter and Biomimetics, Department of Physics, Xiamen University, Xiamen, 361005, PR China; Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, PR China.
Research Institute for Soft Matter and Biomimetics, Department of Physics, Xiamen University, Xiamen, 361005, PR China.
Biosens Bioelectron. 2020 Dec 1;169:112567. doi: 10.1016/j.bios.2020.112567. Epub 2020 Sep 3.
Self-powered flexible sensors play an increasingly important role in wearable and even implantable electronic devices. Silk protein is an ideal material for flexible sensors because of its terrific biocompatibility and controllable degradation rate. Here, we overcome the problem of mechanical flexibility and poor electrical conductivity of proteins, and develop a highly transparent, biocompatible, full-degradable and flexible triboelectric nanogenerator (Bio-TENG) for energy harvesting and wireless sensing. First, the mechanical flexibility of the silk protein film is greatly enhanced by the mesoscopic functionalization of regenerated silk fibroin (RSF) via adding glycerol and polyurethane (PU). Second, hollow silver nanofibers are constructed on the silk film to form an air-permeable, stretchable, biocompatible and degradable thin layer and utilized as friction electrode. The obtained Bio-TENG demonstrates high transparency (83% by one Ag gird layer), stretchability (Ɛ = 520%) and an instantaneous peak power density of 0.8 W m that can drive wearable electronics. Besides, the Bio-TENG can work as artificial electronic skin for touch/pressure perception, and also for wirelessly controlling Internet of Things as a switch.
自供电的柔性传感器在可穿戴式甚至可植入式电子设备中发挥着越来越重要的作用。由于其极好的生物兼容性和可控制的降解速率，丝蛋白是用于柔性传感器的理想材料。在这里，我们克服了蛋白质的机械灵活性和导电性差的问题，开发了一种高度透明、生物兼容、完全可降解和灵活的摩擦电纳米发电机（Bio-TENG），用于能量收集和无线传感。首先，通过添加甘油和聚氨酯（PU）对再生丝素蛋白（RSF）进行介观功能化，极大地增强了丝蛋白膜的机械灵活性。其次，在丝膜上构建了中空银纳米纤维，形成了透气、可拉伸、生物兼容和可降解的薄涂层，并用作摩擦电极。所获得的 Bio-TENG 表现出高透明度（一层 Ag 网格为 83%）、拉伸性（Ɛ=520%）和瞬时峰值功率密度为 0.8 W m，可驱动可穿戴电子设备。此外，Bio-TENG 可用作触摸/压力感知的人工电子皮肤，也可用作物联网的无线控制开关。
