Hydrogel for treating chronic difficult-to-heal wounds and preparation method thereof

The invention belongs to the technical field of medical wound repair, and discloses hydrogel for treating chronic difficult-to-heal wounds and a preparation method thereof. The hydrogel comprises methacrylate, methacrylic acid, wood vinegar tea polyphenol mixed liquor, a cross-linking agent, polyethylene glycol diacrylate and TEMPO oxidized cellulose nanofibrils. According to the hydrogel for treating the chronic difficult-to-heal wounds and the preparation method thereof, differing from the prior art, the hydrogel for quickly healing wounds is provided, and healing molecules required by the wounds are supplied as needed, so that the self-healing function of difficult-to-heal parts is accelerated; meanwhile, the waterproof property of the hydrogel effectively intercepts overflowed blood, so that the effect of quickly stopping bleeding is achieved; and special matching is performed through proper matching and resistance of the individual body, and then elements capable of being contained by the body are select