He Yin, Su Jianjun, Niu Xin, Jia Tianheng, Xu Xiaoxuan, Liang Wenjing, Wang Qi, Liu Hao
School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
Institute of Intelligent Wearable Electronic Textiles, Tiangong University, Tianjin 300387, China.
ACS Sens. 2025 Sep 26;10(9):6918-6927. doi: 10.1021/acssensors.5c01945. Epub 2025 Sep 2.
Flexible sensors have significant application potential in various areas, such as wearable devices, medical condition monitoring, and smart materials. However, these sensors mostly require integrated external electrodes, resulting in complex structures that limit flexibility and integration. This study integrates an in situ functional core as the electrode and a nanofiber sheath that serves dually as the sensing layer and ion transport channel, thereby simplifying the structural complexity of conventional multilayer sensors. Through conjugated electrospinning, a corespun yarn ion sensor was fabricated using silver-plated yarn as the core and P(VDF-HFP)-IL nanofibers as the sheath, eliminating the need for external electrodes. The resulting sensor is capable of real-time, in situ detection of both pressure and temperature stimuli, with a pressure sensitivity of 2.30 kPa within the range of 0-100 kPa and a temperature sensitivity of 0.517 °C within the range of 24-55 °C. The pressure range is up to 700 kPa. Additionally, the sensor shows excellent cyclic stability (>4000 cycles) and moisture permeability. Using textile technology, the corespun yarn ion sensors can be woven into fabrics to achieve real-time mapping of electromyographic parameters through an electrical impedance tomography system.
柔性传感器在可穿戴设备、医疗状况监测和智能材料等各个领域具有巨大的应用潜力。然而，这些传感器大多需要集成外部电极，导致结构复杂，限制了灵活性和集成度。本研究将原位功能核心作为电极与纳米纤维鞘相结合，纳米纤维鞘同时作为传感层和离子传输通道，从而简化了传统多层传感器的结构复杂性。通过共轭静电纺丝，以镀银纱线为芯、P(VDF-HFP)-IL纳米纤维为鞘制备了一种共纺纱线离子传感器，无需外部电极。所得传感器能够实时、原位检测压力和温度刺激，在0-100 kPa范围内压力灵敏度为2.30 kPa，在24-55 °C范围内温度灵敏度为0.517 °C。压力范围高达700 kPa。此外，该传感器具有出色的循环稳定性（>4000次循环）和透湿性。利用纺织技术，可将共纺纱线离子传感器编织成织物，通过电阻抗断层成像系统实现肌电参数的实时映射。
