材料科学
弹性体
液晶
复合材料
纳米技术
光电子学
作者
Melvin Colorado Escobar,Timothy J. White
标识
DOI:10.1002/adma.202401140
摘要
Abstract The performance of robotic systems could benefit from low‐density material actuators that emulate muscle typology (e.g., fast and slow twitch) of natural systems. Recent reports detail the thermomechanical, chemical, electrical, and pneumatic response of twisted and coiled fibers. The geometrical constraints imparted on typically commodity materials realize distinguished stimuli‐induced actuation including low density, high force, and moderate stroke. Here, we prepare actuators by twisting fibers composed of liquid crystal elastomers (LCEs). The actuators combine the inherent stimuli‐response of LCEs with the geometrical constraints of twisted fiber actuators to dramatically increase the deformation rate, specific work, and achievable force output. In some geometries, the thermomechanical response of the LCE exhibits a pseudo‐first‐order transition. This article is protected by copyright. All rights reserved
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