Microstructured Actuation of Liquid Crystal Polymer Networks,Advanced Functional Materials

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Microstructured Actuation of Liquid Crystal Polymer Networks
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2019-04-16 , DOI: 10.1002/adfm.201901890
Feijie Ge ₁ , Yue Zhao ₁

Affiliation

Smart microstructured materials enable functions such as actuation, detection, transportation, and sensing with potential applications ranging from robotics and photonics to biomedical devices. Of the many materials systems, liquid crystal polymer networks (LCN) are fascinating owing to their ability to exhibit reversible macroscopic deformation driven by a molecular order–disorder phase transition. LCN have been increasingly explored for their utility in the design and fabrication of smart actuating devices capable of complex shape changes or motions upon external stimulation of humidity, heat, light, and other stimuli, and recent studies in this field show that their actuation complexity can be enriched and actuation performance enhanced by having some sort of microstructures. Herein, the recent progress in microstructured actuation of LCN materials with substructures in scale ranging from micrometer to millimeter is reported, placing the emphasis on the main approaches to generating a microstructure in LCN, which include patterned LC director fields, patterned chain crosslinking in LCN with uniaxial orientation of mesogens, 3D/4D printing, and replica molding. The potential applications in microstructured 3D actuators and devices as well as functional LCN surfaces are also highlighted, with an outlook on important issues and future trends in smart microstructured LCN materials and actuators.

中文翻译：

液晶聚合物网络的微结构驱动

智能的微结构材料可实现诸如致动，检测，运输和传感之类的功能，其潜在应用范围从机器人技术，光子技术到生物医学设备。在许多材料系统中，液晶聚合物网络（LCN）令人着迷，原因是它们具有表现出由分子有序-无序相变驱动的可逆宏观变形的能力。人们越来越多地探索LCN在设计和制造智能促动设备中的实用性，这些智能促动设备能够在外部刺激湿度，热，光和其他刺激的情况下进行复杂的形状变化或运动，并且该领域的最新研究表明，它们的促动复杂性可以通过具有某种微观结构，可以丰富和提高致动性能。在此处，报道了LCN材料的微结构化驱动的最新进展，其子结构的尺寸范围从微米到毫米，重点放在了在LCN中生成微结构的主要方法上，包括图案化LC指向矢场，LCN中具有单轴取向的图案化链交联介晶，3D / 4D打印和复制品成型。还着重介绍了微结构3D致动器和设备以及功能性LCN表面的潜在应用，并对智能微结构LCN材料和致动器的重要问题和未来趋势进行了展望。LCN中具有介晶原的单轴取向，3D / 4D打印和复制品成型的图案化链交联。还着重介绍了微结构3D致动器和设备以及功能性LCN表面的潜在应用，并对智能微结构LCN材料和致动器的重要问题和未来趋势进行了展望。LCN中具有介晶原的单轴取向，3D / 4D打印和复制品成型的图案化链交联。还着重介绍了微结构3D致动器和设备以及功能性LCN表面的潜在应用，并对智能微结构LCN材料和致动器的重要问题和未来趋势进行了展望。

更新日期：2020-01-11

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