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Boronic acid-based hydrogels self-heal in a variety of media. A) 2APBA and PVOH form a dynamic reversible covalent bond at neutral pH. Hydrogel healing in different media was assessed by B) a hang test and C) rheology using a strain sweep. During the strain sweep, the hydrogel network was ruptured as evidenced by the crossover of G´ and G´´, and upon reduction of strain, crossover of G´ and G´´ was observed, indicating hydrogel healing.
