自愈
偶氮苯
材料科学
螺吡喃
聚合物
部分
纳米凝胶
自愈水凝胶
流变学
环糊精
光异构化
紫外线
高分子化学
化学
纳米技术
药物输送
复合材料
异构化
有机化学
光电子学
替代医学
催化作用
病理
医学
作者
Qiaofeng Yang,Ping Wang,Chuanzhuang Zhao,Wen-Qin Wang,Jingfa Yang,Li Qiao
标识
DOI:10.1002/marc.201600741
摘要
A self‐healing hydrogel is prepared by crosslinking acrylamide with a host–guest macro‐crosslinker assembled from poly(β‐cyclodextrin) nanogel and azobenzeneacrylamide. The photoisomerizable azobenzene moiety can change its binding affinity with β‐cyclodextrin, therefore the crosslinking density and rheology property of the hydrogel can be tuned with light stimulus. The hydrogel can repair its wound autonomously through the dynamic host–guest interaction. In addition, the wounded hydrogel will lose its ability of self‐healing when exposed to ultraviolet light, and the self‐healing behavior can be recovered upon the irradiation of visible light. The utilizing of host–guest macro‐crosslinking approach manifests the as‐prepared hydrogel reversible and light‐switchable self‐healing property, which would broaden the potential applications of self‐healing polymers. image
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