材料科学
压阻效应
复合材料
纺纱
碳纳米管
可穿戴计算机
电容感应
芯(光纤)
纳米复合材料
可穿戴技术
可伸缩电子设备
纳米技术
数码产品
超细纤维
电气工程
计算机科学
嵌入式系统
工程类
作者
Zhenhua Tang,Shuhai Jia,Fei Wang,Changsheng Bian,Yuyu Chen,Yonglin Wang,Bo Li
标识
DOI:10.1021/acsami.7b18677
摘要
Lightweight, stretchable, and wearable strain sensors have recently been widely studied for the development of health monitoring systems, human–machine interfaces, and wearable devices. Herein, highly stretchable polymer elastomer-wrapped carbon nanocomposite piezoresistive core–sheath fibers are successfully prepared using a facile and scalable one-step coaxial wet-spinning assembly approach. The carbon nanotube–polymeric composite core of the stretchable fiber is surrounded by an insulating sheath, similar to conventional cables, and shows excellent electrical conductivity with a low percolation threshold (0.74 vol %). The core–sheath elastic fibers are used as wearable strain sensors, exhibiting ultra-high stretchability (above 300%), excellent stability (>10 000 cycles), fast response, low hysteresis, and good washability. Furthermore, the piezoresistive core–sheath fiber possesses bending-insensitiveness and negligible torsion-sensitive properties, and the strain sensing performance of piezoresistive fibers maintains a high degree of stability under harsh conditions. On the basis of this high level of performance, the fiber-shaped strain sensor can accurately detect both subtle and large-scale human movements by embedding it in gloves and garments or by directly attaching it to the skin. The current results indicate that the proposed stretchable strain sensor has many potential applications in health monitoring, human–machine interfaces, soft robotics, and wearable electronics.
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