液晶弹性体自持驱动器研究进展OA北大核心

Liquid crystal elastomer(LCE)actuators are stimuli-responsive anisotropic polymer networks with aligned mesogens and moderate crosslinking.Renowned for their reversible actuation capability,diverse stimuli-responsiveness,rapid response,high programmability and robust mechanical properties,LCE actuators hold significant promise in applications such as soft robotics,artificial muscles and micro-intelligent devices.Recently,based on the reversible actuation of LCEs,self-sustained LCE actuators have emerged through the integration of built-in negative feedback loop control within the actuating system.These actuators emulate biological soft systems,executing rhythmic,continuous,and self-sustaining motions by autonomously harvesting energy from constant stimuli or natural environments and converting it into perpetual mechanical motion through their physical intelligence.This review offers a comprehensive analysis of the stimuli-responsiveness,construction principles,negative feedback control mechanisms,motion dynamics and potential application fields of two key categories:LCE self-oscillators and LCE self-sustained locomotors.We also provide an outlook on the future prospect of self-sustained LCE actuaors.