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北京大学 材料科学与工程学院, 北京 100871
[ "王建闯(1989-), 男, 河南平顶山人, 博士, 2021年于中国地质大学(北京)获得博士学位, 主要从事光响应液晶聚合物复合材料研究。E-mail: wangjianchuang2009@163.com" ]
[ "于海峰(1975-), 男, 河北秦皇岛人, 博士, 研究员, 2003年于清华大学获得博士学位, 主要从事液晶/高分子功能材料研究。E-mail: yuhaifeng@pku.edu.cn" ]
收稿日期:2021-10-09,
修回日期:2021-11-01,
纸质出版日期:2022-02
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王建闯, 王文忠, 于海峰. 光驱动液晶聚合物振动器研究进展[J]. 液晶与显示, 2022,37(2):186-198.
Jian-chuang WANG, Wen-zhong WANG, Hai-feng YU. Research progress in light-driven oscillators of liquid-crystalline polymers[J]. Chinese journal of liquid crystals and displays, 2022, 37(2): 186-198.
王建闯, 王文忠, 于海峰. 光驱动液晶聚合物振动器研究进展[J]. 液晶与显示, 2022,37(2):186-198. DOI: 10.37188/CJLCD.2021-0253.
Jian-chuang WANG, Wen-zhong WANG, Hai-feng YU. Research progress in light-driven oscillators of liquid-crystalline polymers[J]. Chinese journal of liquid crystals and displays, 2022, 37(2): 186-198. DOI: 10.37188/CJLCD.2021-0253.
光响应液晶聚合物在光化学(如偶氮苯)或者光热(如氧化石墨烯)作用下发生有序-无序转变,进而产生宏观形变,是一类被广泛研究的智能材料。目前光驱动液晶聚合物振动器的实现主要有两种途径:一是紫外或者可见光连续照射时,偶氮苯液晶聚合物的力学特性发生非线性变化,驱动器呈现无规振动;二是通过构筑非平衡系统,利用驱动器运动过程中的自遮挡效应,在光源连续照射下自发地产生周期性、连续性运动,可用于光学信号调制、移动机器人、能量转换、轧机、马达等。本文综述了光驱动液晶聚合物振动器领域的研究进展,详细介绍了其设计原理、运动机理以及应用领域,对未来的发展趋势做出了展望。
Photo-responsive liquid-crystalline polymers (LCPs) containing photoisomerizable molecular switches (such as azobenzene
AZ) or photothermal agents (such as graphene)
are a type of widely investigated smart materials
which can undergo an order-disorder transition
inducing a macroscopic shape change. Presently
light-driven oscillators of LCPs have been achieved mainly by two methods. One is that the actuator displays chaotic swing for the nonlinear change of mechanical properties of LCPs containing AZs under continuous UV or visible light illumination. The other is constructing nonequilibrium systems and relying on the self-shadowing effect during motion. The actuator can realize periodical and sustained motion without additional manual control components
which can be extensively exploited in light signal modulation
mobile robots
energy harvesting
mills
motors
etc.
This paper reviews the research progress of light-driven oscillators of LCPs in the past few years
and also introduces its fabrication methods
motion mechanisms and application areas in details. Finally
it provides a view of prospective of its future development trend for light-driven oscillators of LCPs.
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