Waterproof Iontronic Yarn for Highly Sensitive Biomechanical Strain Monitoring in Wearable Electronics

IF 17.2 1区工程技术 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advanced Fiber Materials Pub Date : 2024-04-09 DOI:10.1007/s42765-024-00381-0

Zhiping Feng, Qiang He, Xue Wang, Jing Qiu, Hongbing Wu, Yinggang Lin, Yufen Wu, Jin Yang

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Abstract

Flexible yarn sensors designed for integration into textiles have the potential to revolutionize wearable technology by continuously monitoring biomechanical strain. However, existing yarn-shaped sensors rely on capacitance as a strain-dependent electrical signal and often face limitations in achieving high sensitivity, especially across a broad strain range. Here, we propose a waterproof all-in-one capacitive yarn sensor (ACYS) that is tailored to monitor a wide range of biophysical strains. Owing to the coaxial helical electrode and the ionic liquid-doped dielectric layer, the ACYS demonstrates remarkable stretchability, ultrahigh capacitance variation, and an outstanding gauge factor of 6.46 at 140% strain. With exceptional mechanical durability based on enduring 3300 stretching cycles and favorable resistance to sweat erosion, this 1D structure can be seamlessly integrated into textiles, making it ideal for use in wearable electronics. Demonstrating its application versatility, the ACYS accurately measures biomechanical strain in joint movements, facial expressions, and physiological assessments, making it a promising advancement in wearable technology.

Graphical Abstract

Abstract Image

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用于可穿戴电子设备中高灵敏度生物力学应变监测的防水离子纱线

设计用于集成到纺织品中的柔性纱线传感器通过持续监测生物力学应变，有望彻底改变可穿戴技术。然而，现有的纱线传感器依赖电容作为应变电信号，在实现高灵敏度方面往往面临限制，尤其是在宽应变范围内。在此，我们提出了一种防水的一体化电容式纱线传感器（ACYS），该传感器专为监测各种生物物理应变而量身定制。由于采用了同轴螺旋电极和离子液体掺杂的电介质层，ACYS 表现出卓越的可拉伸性、超高的电容变化以及在 140% 应变时 6.46 的出色测量系数。这种 1D 结构可无缝集成到纺织品中，具有经受 3300 次拉伸循环的卓越机械耐久性和良好的耐汗液侵蚀性，是可穿戴电子产品的理想选择。ACYS 能精确测量关节运动、面部表情和生理评估中的生物力学应变，证明了其应用的多样性，是可穿戴技术领域的一大进步。

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来源期刊

Advanced Fiber Materials Multiple-

CiteScore

18.70

自引率

11.20%

发文量

109

期刊介绍： Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al. Publishing on fiber or fiber-related materials, technology, engineering and application.