偶氮苯
执行机构
聚合物
材料科学
垂直的
异构化
紫外线
化学工程
光电子学
高分子化学
光化学
复合材料
化学
有机化学
计算机科学
催化作用
几何学
人工智能
工程类
数学
作者
Zhiyuan Yang,Lidong Zhang
出处
期刊:Macromolecules
[American Chemical Society]
日期:2023-09-13
卷期号:56 (18): 7551-7560
被引量:1
标识
DOI:10.1021/acs.macromol.3c01263
摘要
Azobenzene-based photoresponsive polymer film actuators normally bend toward an ultraviolet (UV) source, in which their photosensitive mesogens are stabilized in cross-linking polymer networks. Herein, we synthesize a non-cross-linking liquid-crystalline (LC) polymer film actuator, in which the photoresponsive azobenzene mesogens are aligned in a perpendicular direction to the non-cross-linking polymer chains. Upon exposure to UV light (λ = 365 nm), the trans-to-cis isomerization generates expanding strength along the parallel direction with respect to the polymer main chains, which causes the film actuator to bend away from the light source. After prestretching the film actuator at 120 °C to enhance its perpendicular alignments of the azobenzene mesogens, its photoresponsive performance can be improved. As a result, the film actuator shows flexible and multifarious motions not only in air but also in liquid environments, making it more adaptable to sensing systems, soft robots, and artificial muscles.
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