Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 41, Issue 4, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201900457
Keywords
metal-ligand coordination; self-healing; supramolecular hydrogels
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Funding
- China Scholarship Council (CSC) [201506780014]
- Ghent University (Special Research Fund (BOF)) [01SC1717]
- BOF
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In this study, a supramolecular hydrogel formed by incorporating the 2,6-bis(1,2,3-triazol-4-yl)-pyridine (btp) ligand in the backbone of a polymer prepared by copper(I)-catalyzed alkyne-azide cycloaddition (CuAAC) click polyaddition reaction of 2,6-diethynylpyridine and diazido-poly(ethylene glycol) is reported. The hydrogelation is selectively triggered by the addition of Ni2+ ions to aqueous copolymer solutions. The gelation and rheological properties could be tuned by the change of metal to ligand ratio and polymer concentration. Interestingly, the hydrogel exhibits a fast (within 2 min) and excellent repeatable autonomic healing capacity without external stimuli. This self-healing behavior may find potential applications for the repairing of metal coatings, in the future.
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