The development of multi-functional piezoelectric polymer film is of great significance to many application fields, such as those involving wearable functional devices, flexible sensors, and actuators. In this study, multilayer P(VDF-HFP) nanocomposite films were prepared using electrospinning technology with the MWCNTs-COOH and Eu complexes as fillers to achieve a fluorescent labeled multimode pressure sensor. The sandwich-structured devices were prepared using both electrospun polyurethane (PU) nanofiber films and P(VDF-HFP) composite nanofiber films, where the P(VDF-HFP) composite nanofiber film was used as the core electroactive layer and the PU nanofiber film was used for the skin layers. The resulting sandwich-structured devices showed high sensitivity at ultra-low-pressure (<1 kPa), high piezoelectric output (2.1V), fluorescence functionality, excellent flexibility, and good thermal properties. Our results suggest that sandwich-structured devices based on fluorescent labeled electroactive P(VDF-HFP) composite nanofiber films have great potential for application in the fields of multi-functional flexible sensors and intelligent wearables.

多功能压电聚合物薄膜的开发对许多应用领域都具有重要意义，例如涉及可穿戴功能器件、柔性传感器和执行器等领域。在这项研究中，采用静电纺丝技术制备了多层 P(VDF-HFP) 纳米复合薄膜，以 MWCNTs-COOH 和 Eu 配合物为填料，实现了荧光标记的多模压力传感器。采用电纺聚氨酯 (PU) 纳米纤维薄膜和 P(VDF-HFP) 复合纳米纤维薄膜制备夹心结构器件，其中 P(VDF-HFP) 复合纳米纤维薄膜作为核心电活性层和 PU 纳米纤维薄膜。用于皮肤层。由此产生的夹层结构器件在超低压（<1 kPa）、高压电输出（2.1V）、荧光功能、优异的柔韧性和良好的热性能。我们的研究结果表明，基于荧光标记的电活性 P(VDF-HFP) 复合纳米纤维薄膜的夹层结构器件在多功能柔性传感器和智能可穿戴设备领域具有巨大的应用潜力。