Solvent-free stretchable photo-responsive supramolecular actuator topologically cross-linked by azobenzene-cyclodextrin based slide-ring system

被引：8
作者：
Ma, Wenjing [1 ]
Fang, Hui [1 ]
Tian, Dandan [1 ]
Zheng, Lingji [1 ]
Xie, Meiran [1 ]
Sun, Ruyi [1 ]
机构：
[1] East China Normal Univ, Sch Chem & Mol Engn, 500 Dongchuan Rd, Shanghai 200241, Peoples R China
来源：
DYES AND PIGMENTS | 2022年 / 200卷
基金：
上海市自然科学基金;
关键词：
Photo-responsive hydrogel; Supramolecular actuator; Slide-ring; Host-guest interaction; LIGHT;
D O I：
10.1016/j.dyepig.2022.110120
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The highly reversible photo-isomerization speed and efficiency of azobenzene make photomechanical polymers come true. While how to amplify the impact of molecular photo-isomerization upon the polymers to realize macro-motions remains a long way. Here we prepared a multi-stimuli-responsive supramolecular actuator via introducing slide-ring cross-linkers of azobenzene-cyclodextrin into polyacrylamide network. The result gel showed extremely quick response to various stimuli especially light even without solvent. Attributing to the slide-ring crosslinkers in the structure, the bending angle of CD-Azo gel reached to 40.0within 0.5 s toward 365 nm light resource. In addition, overcoming the mechanical weakness of stimuli-sensitive hydrogel, the solvent free polymer film exhibited high tensile strength of 15.00 MPa, elongation at breaking limit of 150% and Young's modulus of 0.34 MPa.
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页数：7
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