Fig. 4

Wound dressings with hemostatic function. A Antibacterial, anti-oxidant, and electroactive dressing for wound repair based on quaternized chitosan-g-polyaniline (QCSP) and benzaldehyde group functionalized poly(ethylene glycol)-co-poly(glycerol sebacate) (PEGS-FA). Schematic illustration of this hydrogel’s synthesis. (a-c) Synthesis processes; (d) Photos of solutions and hydrogel (QCSP3/PEGS-FA1.5); (e) Two shapes (bending and pressing) of this hydrogel. Reprinted with permission from ref [77]. Copyright 2017 Elsevier. B Schematic diagram for the interface interactions between tissue and hydrogel, with desired properties such as hemostasis. Reprinted with permission from ref [88]. Copyright 2021 Elsevier. C A visible light-stimulating hemostatic adhesive (HAD). (a) Schematic overview of the visible light–responsive photopolymerization device; (b) Before (top), during (middle), and after visible light illumination, a digital image of the HAD gelling transition was taken (bottom); (c) Diagram depicting the formation of rat tail hemorrhage and a hemostatic model; (d) Schematic presentation of hemostatic processes and hemostatic assay using HAD based on a serious liver wound model. Reprinted with permission from ref [64]. Copyright 2021 AAAS