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(A) The dynamic antibacterial hydrogel dressings prepared using quaternized chitosan (QCS) and dialdehyded polyethylene glycol (PEGDA) [75]. (B) Hydrogels prepared using N-2-HACC promote wound healing [76]. (C) A double-network hydrogel based on HACC, TA, and PVA was fabricated using a combination approach of cyclic freeze–thaw and soaking methods [77].
