Muscle filaments are bundled together as a fascicle to generate large strength and high work capacity. However, presently developed artificial muscles are mainly investigated as single muscle filaments, which cannot meet the requirements of practical applications. Herein, an artificial muscle fascicle that was prepared by torque-balanced bundling of torsionally stable carbon nanotube muscle filaments that was prepared by an incandescent tension annealing process (ITAP) was reported. The artificial muscle fascicle exhibited excellent actuation performance with a low driving voltage (≤5.0 V), large contractile stroke (>30%), high generated isometric force (>0.5 N), and long cyclic stability (>3000 cycles). Meanwhile, artificial muscle fascicles not only can mimic the skeletal muscles to generate strength but also improve the energy-storage function many times compared to the muscle filament. Based on this excellent actuation and energy storage performances, the actuation property and energy storage functions are successfully integrated into the same artificial muscle, thereby accomplishing a multi-functional integrated device that can miniaturize their size. The multi-functionality, miniaturization, and integration of artificial muscles are essential for developing soft robots.

肌肉细丝以束的形式捆绑在一起，以产生大的力量和高的工作能力。然而，目前开发的人造肌肉主要是作为单条肌丝进行研究，不能满足实际应用的要求。在此，报道了一种人工肌肉束，该纤维束是通过对通过白炽张力退火工艺 (ITAP) 制备的扭转稳定的碳纳米管肌肉细丝进行扭矩平衡捆绑而制备的。人造肌肉束表现出优异的驱动性能，驱动电压低（≤5.0 V），收缩行程大（> 30％），产生的等长力（> 0.5 N）和循环稳定性长（> 3000次循环）。同时，人造肌束不仅可以模仿骨骼肌产生力量，而且与肌丝相比，能量储存功能提高了很多倍。基于这种优异的驱动和储能性能，成功地将驱动特性和储能功能集成到同一块人造肌肉中，从而实现了尺寸小型化的多功能集成装置。人造肌肉的多功能化、小型化和集成化对于开发软机器人至关重要。从而实现了可以将其尺寸小型化的多功能集成设备。人造肌肉的多功能化、小型化和集成化对于开发软机器人至关重要。从而实现了可以将其尺寸小型化的多功能集成设备。人造肌肉的多功能化、小型化和集成化对于开发软机器人至关重要。