Tan Xueqiang, Huang Zuyi, Pei Hairun, Jia Zongchao, Zheng Jimin
Department of Chemistry, Beijing Normal University, Beijing 100875, China.
Beijing Advanced Innovation Centre for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China.
ACS Sens. 2024 Aug 23;9(8):3938-3946. doi: 10.1021/acssensors.4c00401. Epub 2024 Aug 3.
This study presents the fabrication of an ultralight, porous, and high-performance triboelectric nanogenerator (TENG) utilizing silk fibroin (SF) aerogels and PDMS sponges as the friction layer. The transition from two-dimensional film friction layers to three-dimensional porous aerogels significantly increased the specific surface area, offering an effective strategy for designing high-performance SF aerogel-based TENGs. The TENG incorporating the porous SF aerogel exhibited optimal output performance at a 3% SF concentration, achieving a maximum open circuit voltage of 365 V, a maximum short-circuit current of 11.8 μA, and a maximum power density of 7.52 W/m. In comparison to SF-film-based TENGs, the SF-aerogel based TENG demonstrated a remarkable 6.5-fold increase in voltage and a 4.5-fold increase in current. Furthermore, the power density of our SF-based TENG surpassed the previously reported optimal values for SF-based TENGs by 2.4 times. Leveraging the excellent mechanical stability and biocompatibility of TENGs, we developed an SF-based TENG self-powered sensor for the real-time monitoring of subtle biological movements. The SF-based TENG exhibits promising potential as a wearable bioelectronic device for health monitoring.
本研究展示了一种利用丝素蛋白（SF）气凝胶和聚二甲基硅氧烷（PDMS）海绵作为摩擦层的超轻、多孔且高性能的摩擦电纳米发电机（TENG）的制造方法。从二维薄膜摩擦层到三维多孔气凝胶的转变显著增加了比表面积，为设计基于SF气凝胶的高性能TENG提供了一种有效策略。包含多孔SF气凝胶的TENG在3%的SF浓度下表现出最佳输出性能，实现了365 V的最大开路电压、11.8 μA的最大短路电流以及7.52 W/m的最大功率密度。与基于SF薄膜的TENG相比，基于SF气凝胶的TENG的电压显著提高了6.5倍，电流提高了4.5倍。此外，我们基于SF的TENG的功率密度比先前报道的基于SF的TENG的最佳值高出2.4倍。利用TENG优异的机械稳定性和生物相容性，我们开发了一种基于SF的TENG自供电传感器，用于实时监测细微的生物运动。基于SF的TENG作为一种用于健康监测的可穿戴生物电子设备具有广阔的应用前景。
