Elastic carbon nanotube straight yarns embedded with helical loops
- Shang, Yuanyuan
- Li, Yibin
- He, Xiaodong
- Zhang, Luhui
- Li, Zhen
- Li, Peixu
- Shi, Enzheng
- Wu, Shiting
- Cao, Anyuan
DOIAbstract
Introducing stretchability and elasticity into carbon nanotube (CNT) yarns could extend their applications to areas such as stretchable and deformable fiber-based devices and strain sensors. Here, we convert a straight and inelastic yarn into a highly elastic structure by spinning a predefined number of helical loops along the yarn, resulting in a short helical segment with smooth structural transition to the straight portions. The loop-forming process is well controlled, and the obtained straight-helical-straight hybrid yarn is freestanding, stable, and based entirely on CNTs. The elastic and conductive yarns can be stretched to moderate tensile strains (up to 25%) repeatedly for 1000 cycles without producing residual deformation, with a s...
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