Center for Photonics Information and Energy Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China.
Department of Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123, P. R. China.
Adv Sci (Weinh). 2022 May;9(14):e2105738. doi: 10.1002/advs.202105738. Epub 2022 Mar 14.
Thin, lightweight, and flexible textile pressure sensors with the ability to detect the full range of faint pressure (<100 Pa), low pressure (≈KPa) and high pressure (≈MPa) are in significant demand to meet the requirements for applications in daily activities and more meaningfully in some harsh environments, such as high temperature and high pressure. However, it is still a significant challenge to fulfill these requirements simultaneously in a single pressure sensor. Herein, a high-performance pressure sensor enabled by polyimide fiber fabric with functionalized carbon-nanotube (PI/FCNT) is obtained via a facile electrophoretic deposition (EPD) approach. High-density FCNT is evenly wrapped and chemically bonded to the fiber surface during the EPD process, forming a conductive hierarchical fiber/FCNT matrix. Benefiting from the large compressible region of PI fiber fabric, abundant yet firm contacting points and high elastic modulus of both PI and CNT, the proposed pressure sensor can be customized and modulated to achieve both an ultra-broad sensing range, long-term stability and high-temperature resistance. Thanks to these merits, the proposed pressure sensor could monitor the human physiological information, detect tiny and extremely high pressure, can be integrated into an intelligent mechanical hand to detect the contact force under high-temperature.
具有检测全量程微弱压力(<100 Pa)、低压(≈kPa)和高压(≈MPa)能力的轻薄、灵活的纺织压力传感器，对于满足日常活动以及在某些恶劣环境(如高温高压)中的应用需求具有重要意义。然而，要在单个压力传感器中同时满足这些要求仍然是一个重大挑战。在此，通过简便的电泳沉积(EPD)方法获得了一种由功能化碳纳米管(PI/FCNT)的聚酰亚胺纤维织物实现的高性能压力传感器。在 EPD 过程中，高密度 FCNT 均匀地包裹在纤维表面并与之发生化学结合，形成导电分层纤维/FCNT 基体。得益于 PI 纤维织物的大压缩区域、丰富而牢固的接触点以及 PI 和 CNT 的高弹性模量，所提出的压力传感器可以定制和调节，以实现超宽的传感范围、长期稳定性和耐高温性。由于这些优点，所提出的压力传感器可以监测人体生理信息，检测微小且极高的压力，还可以集成到智能机械手中，以在高温下检测接触力。
