Abstract
Powder-based hemostatic materials have offered unprecedented opportunities for the effective sealing and repair of irregularly shaped wounds and high-pressure, noncompressible arterial bleeding wounds caused by surgeries, traffic accidents, and wartime injuries. However, inadequate adhesion to bleeding wounds and poor hemostasis in biological tissues remains challenging. Herein, we report a self-gelling hemostatic powder based on polyacrylic acid/polyethyleneimine/polyethylene glycol (named PPG) for rapid hemostasis and effective antibacterial ability. When deposited on bleeding wounds, PPG powder can absorb interfacial liquid and rapidly swell into a physically cross-linked hydrogel in situ within 2 s to form a pressure-resistant physical barrier. Furthermore, the in vivo and in vitro results indicate that, as an effective sealant, the PPG powder possesses ease of use, excellent hemocompatibility, strong antibacterial abilities, and superior blood clotting abilities. The effective hemostatic sealing capability of the PPG powder is demonstrated in a variety of injury models in rats and rabbits. All of these factors show that, with its superior wound treatment abilities, PPG powder is a profound biomaterial for surgical applications.