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Transient Healability of Metallosupramolecular Polymer Networks Mediated by Kinetic Control of Competing Chemical Reactions
journal contribution
posted on 2020-04-09, 11:36 authored by Panpan Li, Yuguo Xia, Jingcheng Hao, Xu WangThe
research on intrinsic self-healing chemistry based on the kinetic
lability of chemical bonds/physical interactions is particularly interesting
in renewable/sustainable polymer science due to its importance in
allowing for multiple local healing events to occur. One common problem
with the kinetic lability is the negative effect on the stability
of polymer materials. Herein, we present a hierarchical strategy for
temporal control of the intrinsic healability of kinetically inert
and highly stable metallosupramolecular polymer networks. Enzyme-regulated
competing reactions are used for temporal programming of an oxidation
state change of metal ions in the cobalt cross-linked polymer hydrogels,
which, in turn, tunes the metal–ligand interactions for efficient
defect healing and hydrogel property recovery. The hydrogels exhibit
high stability under harsh conditions and excellent healability with
∼100% recovery by the intake of proper chemical nutrients.
Our approach advances the intrinsic healing of kinetically stable
metallosupramolecular polymer hydrogels without compromising their
composition and homogeneity.
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oxidation state changemetallosupramolecular polymer hydrogelshydrogels exhibitkineticallyhealing eventsKinetic Controlmetal ionsMetallosupramolecular Polymer Networks Mediatedstabilitydefect healinghydrogel property recoveryhealabilityapproach advanceschemical nutrientsTransient HealabilityChemical Reactionsinteractionmetallosupramolecular polymer networkscobalt cross-linked polymer hydrogelsself-healing chemistrypolymer materials
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