Light-Switchable Self-Healing Hydrogel Based on Host-Guest Macro-Crosslinking.
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.
Ningbo Key Laboratory of Specialty Polymers, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
Qiaofeng
Q
Yang
Ningbo Key Laboratory of Specialty Polymers, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
Ping
P
Wang
Ningbo Key Laboratory of Specialty Polymers, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
Chuanzhuang
C
Zhao
Ningbo Key Laboratory of Specialty Polymers, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
Wenqin
W
Wang
Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, China.
Jingfa
J
Yang
Institute of Materials, Ningbo University of Technology, Ningbo, 315016, China.
Qiao
Q
Liu
D020106:Acrylamide / Q000737:chemistry; D003432:Cross-Linking Reagents / Q000737:chemistry*; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000138:chemical synthesis / Q000737:chemistry* / Q000528:radiation effects*; D008027:Light; D046911:Macromolecular Substances / Q000737:chemistry; D015394:Molecular Structure
D003432:Cross-Linking Reagents; D046911:Macromolecular Substances; D020106:Acrylamide; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate
hydrogel; light-responsive; self-healing; supramolecular interaction