Dai Yunling, Qi Kun, Ou Kangkang, Song Yutang, Zhou Yuman, Zhou Meiling, Song Hongjing, He Jianxin, Wang Hongbo, Wang Rongwu
Research Institute of Textile and Clothing Industries, Zhongyuan University of Technology, Zhengzhou 450007, P. R. China.
College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, P. R. China.
ACS Appl Mater Interfaces. 2023 Mar 1;15(8):11244-11258. doi: 10.1021/acsami.2c20322. Epub 2023 Feb 15.
The emerging intelligent piezoresistive yarn/textile-based sensors are of paramount importance for skin-interface electronics, owing to their unparalleled features including softness, breathability, and easy integration with functional devices. However, employing a facile way to fabricate 1D sensing yarns with mechanical robustness, multi-functional integration, and comfortability is still demanded for satisfying the practical applications. Herein, a facile one-step synchronous conjugated electrospinning and electrospraying technique is innovatively employed to continuously construct an Ag NW-embedded polyurethane (PU) nanofiber sensing yarn (AENSY) with hierarchical architecture. This 1D AENSY with weavability and stretchability can be woven into AENSY textile-based sensors integrated with functions of strain and pressure sensing. In this embedded multi-scale architecture, Ag NWs are evenly embedded and locked in the oriented and twisted PU nanofiber (PUNF) scaffold, forming the hierarchical mechanical sensing layer on the surface of the AENSY with favorable stability. Meanwhile, the presence of the elastic PUNFs enhances porosity, elasticity, and considerable deformation space, which in turn endow the AENSY textile-based sensor with a gauge factor (GF) up to 1010, a pressure sensitivity up to 16.7 N, high stretchability up to 160%, and high stability under long-term cycles. In addition, the AENSY textile-based sensor exhibits light weight and the unique advantage of skin-friendliness with the human body, which can be directly and conformally attached to the curved human skin to monitor the various human movements. Furthermore, the weavable AENSYs can be integrated into smart textiles with sensing arrays, which are capable for spatial pressure and strain mapping. Thus, the continuous one-step developing process and the stable embedded-twisted fiber structure provide a promising strategy to develop innovative smart yarns and textiles for personalized healthcare and human-machine interfaces.
新兴的基于智能压阻纱线/纺织品的传感器对于皮肤接口电子学至关重要，这归因于其无与伦比的特性，包括柔软性、透气性以及与功能器件的易于集成。然而，为了满足实际应用需求，仍需要采用一种简便的方法来制造具有机械鲁棒性、多功能集成性和舒适性的一维传感纱线。在此，创新性地采用一种简便的一步同步共轭静电纺丝和电喷雾技术，连续构建具有分级结构的嵌入银纳米线的聚氨酯（PU）纳米纤维传感纱线（AENSY）。这种具有可编织性和可拉伸性的一维AENSY可以编织成具有应变和压力传感功能的基于AENSY纺织品的传感器。在这种嵌入的多尺度结构中，银纳米线均匀地嵌入并锁定在定向且扭曲的PU纳米纤维（PUNF）支架中，在AENSY表面形成具有良好稳定性的分级机械传感层。同时，弹性PUNF的存在提高了孔隙率、弹性和相当大的变形空间，这反过来赋予基于AENSY纺织品的传感器高达1010的应变片系数（GF）、高达16.7 N的压力灵敏度、高达160%的高拉伸性以及在长期循环下的高稳定性。此外，基于AENSY纺织品的传感器重量轻，对人体具有独特的亲肤优势，可直接贴合在人体弯曲皮肤上以监测各种人体运动。此外，可编织的AENSY可以集成到具有传感阵列的智能纺织品中，能够进行空间压力和应变映射。因此，连续的一步开发过程和稳定的嵌入 - 扭曲纤维结构为开发用于个性化医疗保健和人机界面的创新智能纱线和纺织品提供了一种有前景的策略。
