期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201910504
关键词
coaxial fibers; composite fibers; MXene; strain sensors; wearable body movement monitoring
类别
资金
- Australian Research Council [FT130100380, IH140100018, DP170102859]
- Australian National Fabrication Facility (ANFF)
- Australian Government Department of Education and Training through Endeavour Research Fellowship program
- Deakin University through Alfred Deakin Postdoctoral Research Fellowship
- U.S. National Science Foundation [DGE-1646737]
The integration of nanomaterials with high conductivity into stretchable polymer fibers can achieve novel functionalities such as sensing physical deformations. With a metallic conductivity that exceeds other solution-processed nanomaterials, 2D titanium carbide MXene is an attractive material to produce conducting and stretchable fibers. Here, a scalable wet-spinning technique is used to produce Ti3C2Tx MXene/polyurethane (PU) composite fibers that show both conductivity and high stretchability. The conductivity at a very low percolation threshold of approximate to 1 wt% is demonstrated, which is lower than the previously reported values for MXene-based polymer composites. When used as a strain sensor, the MXene/PU composite fibers show a high gauge factor of approximate to 12900 (approximate to 238 at 50% strain) and a large sensing strain of approximate to 152%. The cyclic strain sensing performance is further improved by producing fibers with MXene/PU sheath and pure PU core using a coaxial wet-spinning process. Using a commercial-scale knitting machine, MXene/PU fibers are knitted into a one-piece elbow sleeve, which can track various movements of the wearer's elbow. This study establishes fundamental insights into the behavior of MXene in elastomeric composites and presents strategies to achieve MXene-based fibers and textiles with strain sensing properties suitable for applications in health, sports, and entertainment.
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