Abstract
In this study, a commercially available Spandex multifilament yarn was coated with a thermoplastic polyurethane/carbon nanotube (TPU/CNT) conductive polymer composite (CPC), and conductive elastic yarns with good strain sensing ability were achieved with equivalent CNT concentrations as low as 0.015wt.%. The resistance per meter coated yarn decreased with increasing CNT concentration in the CPC coating, while in the case of a homogeneous coating, the CPC concentration in the coating solution did not have a significant effect on the resistance per meter coated yarn. Upon cyclic loading, the strain sensing behaviour showed partial recovery of resistance in the first loading cycle, while good reversibility was observed a number of cycles, giving these materials good potential as sensors for smart textiles.
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