Preparation of Multi‐Functional Quaternary Ammonium Chitosan/Surfactin Hydrogel and its Application in Wound Management

Hydrogel with a 3D network structure can cover the wound to stop the bleeding and support the host tissue infiltration and integration. In this study, an antibacterial hydrogel with hemostasis and the ability to promote wound healing is proposed. This hydrogel comprised surfactin, polyvinylpyrrolidone, and methacrylic anhydride (MA) grafted quaternary ammonium chitosan (CS‐MA). The hydrogel formation is triggered by the ultraviolet‐initiated polymerization of CS‐MA, while the surfactin is complexed with the hydrogel through hydrogen bonding interaction. The results showed that this hydrogel is an adhesive hydrogel with shape adaptability, which can cover the wound surface and promote contact between the hydrogel and the wound surface. More importantly, this hydrogel can simulate the microenvironment of the primary extracellular matrix and increase collagen deposition, and inflammatory factor transformation. The designing of such a multi‐functional hydrogel is expected to provide a novel approach to promoting the healing of wounds. An antibacterial hydrogel composed of surfactin, polyvinylpyrrolidone, and methacrylic anhydride grafted quaternary ammonium chitosan is proposed. The hydrogel is an adhesive hydrogel with shape adaptability, which can cover the wound surface and promote the contact between the hydrogel and the wound surface. More importantly, this hydrogel can simulate the microenvironment of the primary extracellular matrix and increase the collagen deposition, and inflammatory factor transformation.