Flexible polydimethylsiloxane pressure sensor with micro-pyramid structures and embedded silver nanowires: A novel application in urinary flow measurement
Ben-Song Wang, Ang Gao, Song-Wei Huang, Qi-Hong Ning, Cheng Zhou, Qi-Xiang Song, Da-Xiang Cui
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引用次数: 0
Abstract
Flexible pressure sensors are lightweight and highly sensitive, making them suitable for use in small portable devices to achieve precise measurements of tiny forces. This article introduces a low-cost and easy-fabrication strategy for piezoresistive flexible pressure sensors. By embedding silver nanowires into a polydimethylsiloxane layer with micro-pyramids on its surface, a flexible pressure sensor is created that can detect low pressure (17.3 Pa) with fast response (<20 ms) and high sensitivity (69.6 mA kPa−1). Furthermore, the pressure sensor exhibits a sensitive and stable response to a small amount of water flowing on its surface. On this basis, the flexible pressure sensor is innovatively combined with a micro-rotor to fabricate a novel urinary flow-rate meter (uroflowmeter), and results from a simulated human urination experiment show that the uroflowmeter accurately captured all the essential shape characteristics that were present in the pump-simulated urination curves. Looking ahead, this research provides a new reference for using flexible pressure sensors in urinary flow-rate monitoring.
柔性压力传感器重量轻、灵敏度高,适合用于小型便携式设备,以实现对微小力的精确测量。本文介绍了压阻柔性压力传感器的低成本、易制造策略。通过将银纳米线嵌入表面有微金字塔的聚二甲基硅氧烷层,制造出了一种柔性压力传感器,它能检测低压(17.3 Pa),响应速度快(<20 ms),灵敏度高(69.6 mA kPa-1)。此外,该压力传感器还能对其表面的少量水流做出灵敏而稳定的响应。在此基础上,创新性地将柔性压力传感器与微型转子相结合,制造出一种新型尿流量计(尿流量计),模拟人体排尿实验的结果表明,尿流量计准确捕捉到了泵模拟排尿曲线的所有基本形状特征。展望未来,这项研究为在尿流速率监测中使用柔性压力传感器提供了新的参考。