Abstract Highly flexible and stretchable strain sensors play an important role in the wearable electronic systems. Up to now, it is still an enormous challenge to achieve a good balance between the wide response range and high sensitivity for a resistive-type flexible strain sensor. In this work, we prepared a fiber-shaped strain sensor based on thermoplastic polyurethane (TPU) and multi-walled carbon nanotubes (MWCNTs) via a simple and cost-efficient wet-spun method. The production process can satisfy continuous and large-scale preparation. The generation of the interesting porous structure is related to the solvent exchange in solidification process and beneficial to the improvement of the sensing range. In the uniaxial stretching test, the MWCNTs/TPU fiber-shaped sensor showed an ultra-wide workable strain range (320%), a high sensitivity (gage factor of 22.2 within 160% strain and 97.1 for strain of 160–320%) and a fast response time (

中文翻译：

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具有多孔结构的高度可拉伸碳纳米管/热塑性聚氨酯纤维形应变传感器用于人体运动监测

摘要 高度柔性和可拉伸的应变传感器在可穿戴电子系统中发挥着重要作用。迄今为止，电阻式柔性应变传感器在宽响应范围和高灵敏度之间取得良好的平衡仍然是一个巨大的挑战。在这项工作中，我们通过简单且经济高效的湿纺方法制备了一种基于热塑性聚氨酯 (TPU) 和多壁碳纳米管 (MWCNT) 的纤维状应变传感器。生产工艺可满足连续、大规模制备。有趣的多孔结构的产生与凝固过程中的溶剂交换有关，有利于提高传感范围。在单轴拉伸试验中，MWCNTs/TPU 纤维状传感器表现出超宽的工作应变范围（320%），