Lu Shengchang, Li Shuai, Li Qin, Yang Lin, Zhang Hui, Li Jianguo, Huang Liulian, Chen Lihui, Zeng Hongbo, Wu Hui
College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350108, PR China.
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
J Colloid Interface Sci. 2025 May;685:1087-1098. doi: 10.1016/j.jcis.2025.01.190. Epub 2025 Jan 23.
Flexible hybrid nanogenerators (HNGs) have received significant attention for their potential in harvesting mechanical energy to power portable and miniaturized portable devices. This work presents a method to fabricate flexible, durable and biodegradable electrospun polydopamine@barium titanate/cellulose acetate (PDA@BTO/CA) nanofiber films. This design integrates polydopamine (PDA) and piezoelectric barium titanate (BTO) nanoparticles within a flexible cellulose acetate (CA) matrix to enable self-powered wearable biomonitoring. The inclusion of PDA enhances the physical adhesion between BTO and CA, resulting in a significant 40% increase in voltage output. Notably, the PDA-modified composite PDA@BTO/CA demonstrates remarkable durability over 15,000 cycles and effectively detects a range of human motions (such as fist clenching, wrist bending, elbow movement, walking, running and jumping), transducing them into stable, precise electrical signals. Intriguingly, the hybrid nanogenerator device exhibits robust performance in extreme conditions, including underwater and high or low temperatures, while maintaining its good biodegradability. This work paves the way for advanced self-powered wearable biosensor devices capable of precise and reliable human motion monitoring.
柔性混合纳米发电机（HNGs）因其在收集机械能以为便携式和小型化便携设备供电方面的潜力而备受关注。这项工作提出了一种制备柔性、耐用且可生物降解的电纺聚多巴胺@钛酸钡/醋酸纤维素（PDA@BTO/CA）纳米纤维薄膜的方法。这种设计将聚多巴胺（PDA）和压电钛酸钡（BTO）纳米颗粒整合到柔性醋酸纤维素（CA）基质中，以实现自供电可穿戴生物监测。PDA的加入增强了BTO与CA之间的物理粘附力，使电压输出显著提高了40%。值得注意的是，经PDA改性的复合材料PDA@BTO/CA在超过15000次循环中表现出卓越的耐久性，并能有效检测一系列人体运动（如握拳、手腕弯曲、肘部运动、行走、跑步和跳跃），将其转换为稳定、精确的电信号。有趣的是，这种混合纳米发电机装置在极端条件下（包括水下以及高温或低温环境）仍表现出强大的性能，同时保持良好的生物降解性。这项工作为能够精确、可靠地监测人体运动的先进自供电可穿戴生物传感器设备铺平了道路。
