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- Title
Self‐Healing Metallo‐Supramolecular Hydrogel Based on Specific Ni<sup>2+</sup> Coordination Interactions of Poly(ethylene glycol) with Bistriazole Pyridine Ligands in the Main Chain.
- Authors
Xu, Xiaowen; Jerca, Valentin Victor; Hoogenboom, Richard
- Abstract
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.
- Subjects
METAL coating; LIGANDS (Chemistry); PYRIDINE; AQUEOUS solutions; POLYMERS; ETHYLENE glycol
- Publication
Macromolecular Rapid Communications, 2020, Vol 41, Issue 4, p1
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.201900457