A smart stretchable material is developed from a composite of carbon nanotube (CNT) and fluoroelastomer (FKM), which is fabricated via an internal melt‐mixer method. A unique, double‐percolated, electrically conductive network is observed with ultralow percolation thresholds of 0.45 phr and 1.40 phr CNT. This provides the CNT/FKM nanocomposites with a wide range of strain sensitivity. Thin‐film nanocomposites at the first plateau of conductivity show an ultrahigh sensitivity with a gauge factor (GF) of 1010 at 23% strain for 0.6 phr and of 6750 at 34% strain for 1 phr. At the second plateau of conductivity, 1.5 phr nanocomposite corresponds to higher levels of strain of 78% strain with ultrahigh GF of more than 4 × 10⁴ and 2 phr nanocomposite to almost 100% strain with GF of 1.3 × 10⁵. The CNT/FKM nanocomposites possess a high elongation at break of 430% and up to 232% strain sensitivity. The unique distribution of CNTs in the polar fluoroelastomer FKM facilitates simultaneous high sensitivity and high stretchability, and improved mechanical strength over reported polymer‐based nanocomposite stretchable sensors. The novel, stretchable CNT‐based FKM conductors have great potential for wearable electronics such as stretchable sensors, stretchable light‐emitting diodes (LEDs), and human motion monitoring.

中文翻译：

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具有双渗透网络的可穿戴电子产品的高灵敏度和可拉伸碳纳米管/含氟弹性体纳米复合材料

一种智能的可拉伸材料是由碳纳米管（CNT）和含氟弹性体（FKM）的复合材料开发而成的，该复合材料是通过内部熔融混合器方法制造的。观察到独特的双渗透导电网络，其超低渗透阈值为0.45 phr和1.40 phr CNT。这为CNT / FKM纳米复合材料提供了广泛的应变敏感性。在电导率的第一个平稳期的薄膜纳米复合材料显示出超高的灵敏度，在23％应变下对0.6 phr的应变系数（GF）为1010，在34应变下应变为1 phr的应变系数（GF）为6750。在第二个电导率平台上，1.5 phr纳米复合材料对应于78％应变的较高应变水平，超高GF大于4×10 ^4，而2 phr纳米复合材料对应于100％应变，其中GF为1.3×10 ⁵应变。CNT / FKM纳米复合材料具有430％的高断裂伸长率和高达232％的应变敏感性。碳纳米管在极性含氟弹性体FKM中的独特分布有利于同时实现高灵敏度和高拉伸性，并且与报道的基于聚合物的纳米复合可拉伸传感器相比，机械强度更高。这种新颖的，可拉伸的，基于CNT的FKM导体在可穿戴电子产品方面具有巨大潜力，例如可拉伸传感器，可拉伸发光二极管（LED）和人体运动监测。