Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 37, Pages 24837-24843Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b08207
Keywords
conductive yarn; single-wall carbon nanotue; stretchable strain sensor; wearable devices; core-spun yarn
Funding
- Research Grants Council of Hong Kong SAR, China [CityU 109213]
- Science Technology and Innovation Committee of Shenzhen Municipality [JCYJ20140419115507579]
- Hong Kong Polytechnic University [1-BBA3]
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Smart yams and textiles are an active field of researches nowadays due to their potential applications in flexible and stretchable electronics, wearable devices, and electronic sensors. Integration of ordinary yarns with conductive fillers renders the composite yarns with new intriguing functions, such sensation and monitoring of strain and stress. Here we report a low cost scalable fabrication for highly reliable, stretchable, and conductive composite yam as effective strain sensing material for human motion monitoring. By incorporating highly-conductive single-wall carbon nanotubes (SWCNTs) into the elastic cotton/polyurethane (PU) core-spun yam through a self-designed coating approach, we demonstrated that the yam is able to detect and monitor the movement of human limbs, such as finger and elbow, and even the wink of eyes. By virtue of the covered structure of the cotton/PU yarn and the reinforcement effect of SWCNTs, the composite yarn can bear up to 300% strain and could be cycled nearly 300,000 times under 40% strain :without noticeable breakage. It is promising that this kind of conductive yarn can be integrated into various fabrics and used in future wearable devices and electronic skins.
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