Today the developed yarn muscles or actuators still cannot satisfy the requirements of working in high-temperature environments. Thermal resistivity is highly needed in aerospace and industrial protection applications. Herein, an artificial muscle with high-temperature tolerance is prepared using carbon nanotube (CNT) wrapped poly (p-phenylene benzobisoxazole) (PBO) composite yarns. A thermal twisting method was utilized to reorientate the stiff PBO molecular chains into a uniform and twist-stable coiled structure. The CNT/PBO composite yarn muscle generates reversible contractile strokes up to 18.9% under 5.4 MPa tension and outputs 1.3 kJ kg^− 1 energy density. In contrast to previous actuators, which are normally operated at room temperatures, the CNT/PBO composite yarn muscles can work at ambient temperatures up to 300 °C with high contractile stroke and long-term stability. A bionic inchworm robot, a deployable structure, and smart textiles driven by the high-temperature-tolerant yarn muscles were demonstrated, showing the promise as a soft actuator towards high-temperature environment applications.

Graphical Abstract

A high-temperature-tolerant coiled yarn muscle with high actuation performance at ambient temperatures up to 300 °C was prepared by thermal twisting carbon nanotubes wrapped poly (p-phenylene benzobisoxazole) fibers.

中文翻译：

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使用聚（对苯并二恶唑）复合纱线的耐高温人造肌肉

今天，发达的纱线肌肉或执行器仍然不能满足在高温环境下工作的要求。航空航天和工业保护应用非常需要热电阻率。在此，使用碳纳米管（CNT）包裹的聚（对苯并二恶唑）（PBO）复合纱线制备了一种具有高温耐受性的人造肌肉。利用热扭曲方法将刚性 PBO 分子链重新定向为均匀且扭曲稳定的卷曲结构。CNT/PBO 复合纱线肌肉在 5.4 MPa 张力下产生高达 18.9% 的可逆收缩行程，并输出 1.3 kJ kg ^{- 1}能量密度。与以前通常在室温下运行的致动器相比，CNT/PBO 复合纱线肌肉可以在高达 300°C 的环境温度下工作，具有高收缩行程和长期稳定性。展示了由耐高温纱线肌肉驱动的仿生尺蠖机器人、可展开结构和智能纺织品，显示出作为用于高温环境应用的软执行器的前景。

图形概要

通过热加捻碳纳米管包裹的聚（对苯并苯并二恶唑）纤维，制备了一种在高达 300°C 的环境温度下具有高驱动性能的耐高温卷曲纱线肌肉。