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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Highly Sensitive Breathable and Flexible Pressure Sensor Based on Electrospun Membrane with Assistance of AgNW/TPU as Composite Dielectric Layer
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Highly Sensitive Breathable and Flexible Pressure Sensor Based on Electrospun Membrane with Assistance of AgNW/TPU as Composite Dielectric Layer

机译：基于Extrom纺锤的高度敏感透气和柔性的压力传感器以及Agnw / TPU作为复合介电层的辅助

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Pressure sensors have been widely used in electronic wearable devices and medical devices to detect tiny physical movements and mechanical deformation. However, it remains a challenge to fabricate desirable, comfortable wearing, and highly sensitive as well as fast responsive sensors to capture human body physiological signs. Here, a new capacitive flexible pressure sensor that is likely to solve this problem was constructed using thermoplastic polyurethane elastomer rubber (TPU) electrospinning nanofiber membranes as a stretchable substrate with the incorporation of silver nanowires (AgNWs) to build a composite dielectric layer. In addition, carbon nanotubes (CNTs) were painted on the TPU membranes as flexible electrodes by screen printing to maintain the flexibility and breathability of the sensors. The flexible pressure sensor could detect tiny body signs; fairly small physical presses and mechanical deformation based on the variation in capacitance due to the synergistic effects of microstructure and easily altered composite permittivity of AgNW/TPU composite dielectric layers. The resultant sensors exhibited high sensitivity (7.24 kPa−1 within the range of 9.0 × 10−3 ~ 0.98 kPa), low detection limit (9.24 Pa), and remarkable breathability as well as fast responsiveness (<55 ms). Moreover, both continuously pressing/releasing cycle over 1000 s and bending over 1000 times did not impair the sensitivity, stability, and durability of this flexible pressure sensor. This proposed strategy combining the elastomer nanofiber membrane and AgNW dopant demonstrates a cost-effective and scalable fabrication of capacitive pressure sensors as a promising application in electronic skins and wearable devices.
机译：压力传感器已广泛用于电子可穿戴设备和医疗设备，以检测微小的物理运动和机械变形。然而，制造理想的，舒适的佩戴和高度敏感以及快速敏感传感器仍然是一个挑战，以捕获人体生理迹象。这里，使用热塑性聚氨酯弹性体橡胶（TPU）电纺丝纳米纤维膜作为可伸展基板构建的新型电容柔性压力传感器，其具有掺入银纳米线（AgNW）以构建复合介电层。另外，通过丝网印刷将碳纳米管（CNT）涂在TPU膜上作为柔性电极，以保持传感器的柔韧性和透气性。柔性压力传感器可以检测微小的身体标志;由于微观结构的协同效应，并且易于改变AGNW / TPU复合介电层，基于电容的变化而相当小的物理压力和机械变形。所得传感器表现出高灵敏度（7.24kPa-1在9.0×10-3〜0.98kPa的范围内），检测极限（9.24Pa），透明透气性和快速响应性（<55毫秒）。此外，连续按压/释放循环超过1000秒并弯曲超过1000次，不会损害该柔性压力传感器的灵敏度，稳定性和耐久性。这种组合弹性体纳米纤维膜和AgNW掺杂剂的策略演示了一种具有成本效益和可伸缩的电容式压力传感器的制造，作为电子皮肤和可穿戴设备的有希望的应用。

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