Ag NW-Embedded Coaxial Nanofiber-Coated Yarns with High Stretchability and Sensitivity for Wearable Multi-Sensing Textiles

Yunling Dai; Kun Qi; Kangkang Ou; Yutang Song; Yuman Zhou; Meiling Zhou; Hongjing Song; Jianxin He; Hongbo Wang; Rongwu Wang

doi:10.1021/acsami.2c20322

Ag NW-Embedded Coaxial Nanofiber-Coated Yarns with High Stretchability and Sensitivity for Wearable Multi-Sensing Textiles

ACS Appl Mater Interfaces. 2023 Mar 1;15(8):11244-11258. doi: 10.1021/acsami.2c20322. Epub 2023 Feb 15.

Authors

Yunling Dai^{1

2

3}, Kun Qi^{1

2

3}, Kangkang Ou^{1

3

4}, Yutang Song^{1

3}, Yuman Zhou^{1

3}, Meiling Zhou^{1

3}, Hongjing Song¹, Jianxin He^{1

3}, Hongbo Wang², Rongwu Wang^{1

3}

Affiliations

¹ Research Institute of Textile and Clothing Industries, Zhongyuan University of Technology, Zhengzhou 450007, P. R. China.
² College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, P. R. China.
³ Henan International Joint Laboratory of New Textile Materials and Textiles, Zhengzhou 450007, P. R. China.
⁴ Key Laboratory of High Performance Fibers & Products, Ministry of Education, Donghua University, Shanghai 201620, P.R. China.

PMID: 36791272
DOI: 10.1021/acsami.2c20322

Abstract

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^-1, 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.

Keywords: embedded structure; nanofiber-coated yarn; pressure sensing; smart textile; strain sensing.