High flexibility, good mechanical strength, and high sensitivity are the most important factors in developing wearable devices for real-time physiological monitoring. Here, a self-powered piezoelectric nanogenerators (PENG) based on the composite films made from lead zirconate titanate, microfibrillated cellulose and polyvinyl alcohol (PZT/MFC@PVA) via melt copolymerization method was proposed. Specifically, MFC promoted PVA crystallization when the defects and cracks inside the MFC were filled by PVA, by which the output performance of the proposed PENG was improved. The results showed that a maximum output open-voltage (V_OC) of 16.5 V and a maximum output short-current (I_SC) of 0.86 μA were obtained, the sensitivity of PENG was 0.3168 V·kPa^-1. Based on the PENG's, sensitivity and excellent mechanical properties, it could detect facial activity and chest respiratory in real time, and continuously output pressure waveform. Weak physiological signal below 0.5 kPa could be detected, and the response time was 54 ms, this showed that it had broad application prospects in medical detection and clinical diagnosis.

高柔韧性、良好的机械强度和高灵敏度是开发用于实时生理监测的可穿戴设备的最重要因素。在此，提出了一种基于锆钛酸铅、微纤化纤维素和聚乙烯醇（PZT/MFC@PVA）通过熔融共聚法制成的复合薄膜的自供电压电纳米发电机（PENG）。具体而言，当 MFC 内部的缺陷和裂纹被 PVA 填充时，MFC 促进了 PVA 结晶，从而提高了所提出的 PENG 的输出性能。结果表明，获得了16.5 V的最大输出开路电压（V _OC）和0.86 μA的最大输出短路电流（I _SC），PENG的灵敏度为0.3168 V·kPa ^-1. 基于PENG的灵敏性和优异的机械性能，可以实时检测面部活动和胸腔呼吸，并持续输出压力波形。可检测到0.5 kPa以下的微弱生理信号，响应时间为54 ms，表明其在医学检测和临床诊断方面具有广阔的应用前景。