Shape Memory Hydrogels with Simultaneously Switchable Fluorescence Behavior

Realization of shape memory process in polymeric hydrogels at ambient condition is a significant development to shape memory materials. The sound understanding of the dynamic shape memory process is fundamentally important but limited. Here, a novel shape memory hydrogel with simultaneously switchab...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2018-06, Vol.39 (12), p.e1800130-n/a
Main Authors: Jian, Yu‐kun, Le, Xiao‐xia, Zhang, Yu‐chong, Lu, Wei, Wang, Li, Zheng, Jing, Zhang, Jia‐wei, Huang, You‐ju, Chen, Tao
Format: Article
Language:English
Subjects:
Biodegradable materials
Chitosan
Crosslinking
Dismantling
Fluorescence
Fluoroscopic imaging
Hydrogels
Information storage
Microcrystals
Molecular chains
pH effects
pH‐responsive
Shape effects
Shape memory
shape memory hydrogels
switchable fluorescence
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Summary:Realization of shape memory process in polymeric hydrogels at ambient condition is a significant development to shape memory materials. The sound understanding of the dynamic shape memory process is fundamentally important but limited. Here, a novel shape memory hydrogel with simultaneously switchable fluorescence behavior is developed. The hydrogel is prepared by incorporating a pH‐responsive fluorescent molecule, perylene tetracarboxylic acid, into chitosan‐based hydrogel, and the assembly and disassembly of chitosan chains into microcrystals upon the trigger of pH are applied as reversible crosslinks to achieve shape memory effect. Therefore, the formation and disassociation of microcrystalline chitosan, and the switchable fluorescence performance happen concurrently, which bring convenience to monitoring the shape memory process by fluorescent imaging. Moreover, the erasable fluorescence behavior also gives the hydrogel potential applications in information storage. Shape memory hydrogels with simultaneously switchable fluorescence behavior are fabricated. The hydrogel exhibits pH‐responsive shape memory properties based on the formation of chitosan microcrystalline, and switchable fluorescence performance due to the disaggregation of perylene tetracarboxylic acid moieties upon the trigger of pH, which will bring convenience to monitoring the shape memory process by fluorescent imaging.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.201800130