Polymer Complex Fiber for Linear Actuation with High Working Density and Stable Catch-State,ACS Macro Letters

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Polymer Complex Fiber for Linear Actuation with High Working Density and Stable Catch-State
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-10-13 , DOI: 10.1021/acsmacrolett.0c00633
Dezhong Liu ₁ , Liping Zhu ₁ , Wentao Huang ₁ , Kan Yue ₂ , Shuguang Yang ₁

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Fiber-based linear actuators (FLAs) are a key module in microrobots and biomimetic devices. It has been a great challenge to develop linear actuators that can balance output stress and output strain and hence provide high working density. Herein, we report the preparation and performance of a FLA system made from commercially available materials and allowed mass production at relatively low cost. The FLAs can lift up or lay down objects more than 1000 times of its own weight during active contraction and expansion under environmental stimuli. The contraction ratio and output stress can reach 30% and 0.24 MPa, respectively, and the sustainable work density is about 80 J/kg, which is 10 times the typical value of human skeletal muscles. Especially, the FLAs show stable catch-state (lock-up state) with no creeping and no further energy consumption.

中文翻译：

具有高工作密度和稳定捕获状态的线性驱动聚合物复合光纤

基于光纤的线性致动器 (FLA) 是微型机器人和仿生设备中的关键模块。开发能够平衡输出应力和输出应变从而提供高工作密度的线性致动器一直是一个巨大的挑战。在这里，我们报告了由市售材料制成的 FLA 系统的制备和性能，并允许以相对较低的成本进行大规模生产。FLA 在环境刺激下主动收缩和扩张时，可以举起或放下超过自身重量 1000 倍的物体。收缩率和输出应力分别可以达到30%和0.24 MPa，可持续工作密度约为80 J/kg，是人体骨骼肌典型值的10倍。特别是，FLA 显示出稳定的捕获状态（锁定状态），没有蠕变，也没有进一步的能量消耗。

更新日期：2020-11-17

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