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Piezoelectric polymer nanofibers for pressure sensors and their applications in human activity monitoring

机译：用于压力传感器的压电聚合物纳米纤维及其在人类活动监测中的应用

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Miniaturized, wearable and self-powered sensors are crucial for applications in artificial intelligence, robotics, healthcare, and communication devices. In particular, piezoelectric polymer-based sensing systems have the advantages of light weight, large piezoelectricity and mechanical flexibility, offering great opportunities in flexible and stretchable electronic devices. Herein, free-standing large-size nanofiber (NF) membranes have been fabricated by an electrospinning technique. Our results show that the as-synthesized P(VDF–TrFE) NFs are pure β-phase and exhibit excellent mechanical and thermal properties. Besides having high sensitivity and operational stability, the fibrous sensor can generate remarkable electrical signals from applied pressure, with an output voltage of 18.1 V, output current of 0.177 μA, and power density of 22.9 μW cm ~(?2) . Moreover, such sensors also produce significant electrical performance of up to a few volts under human mechanical stress, thereby allowing for the monitoring of biomechanical movement of the human foot, elbow, and finger. Our study sheds light onto the use of piezoelectric polymers for flexible self-powered sensing electronics and wearable devices.
机译：小型化，可穿戴和自动传感器对于人工智能，机器人，医疗保健和通信设备中的应用至关重要。特别地，基于压电聚合物的传感系统具有重量轻，压电性和机械柔韧性的优点，在柔性和可拉伸的电子设备中提供了很大的机会。这里，通过静电纺丝技术制造了独立式大型纳米纤维（NF）膜。我们的结果表明，AS合成的P（VDF-TRFE）NFS是纯β相的，表现出优异的机械和热性能。除了具有高灵敏度和操作稳定性之外，纤维传感器还可以产生来自施加压力的显着电信号，输出电压为18.1V，输出电流为0.177μA，功率密度为22.9μW〜（Δ2）。此外，这种传感器还在人的机械应力下产生高达几伏的显着电气性能，从而允许监测人脚，肘部和手指的生物力学运动。我们的研究揭示了使用压电聚合物，用于柔性自动传感电子和可穿戴设备。

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