Blood-triggered self-sealing and tissue adhesive hemostatic nanofabric

Current hemostatic fabric often encounters the issue of blood seeping or leaking through the fabric and at the junctions between the fabric and tissue, leading to extra blood loss. Herein, we report a hemostatic nanofabric composed of anionic and cationic nanofibers. Upon contact with wound, the porous nanofabric can absorb the interfacial blood and self-seal to form a compact physical barrier through interfiber bonding, preventing blood from longitudinally penetrating the fabric. This process results in the encapsulation of blood components within the electrostatically crosslinked nanofiber network, creating a robust thrombus that reinforces the physical barrier. Moreover, this nanofabric exhibits strong tissue adhesiveness, inhibiting blood seeping out at the seam of the fabric and tissue. Its hemostatic performance in animal injuries surpasses that of standard cotton gauze and Combat GauzeTM. In the pig femoral artery injury, the blood loss from the nanofabric is only ca. 8% of that from Combat GauzeTM. The nanofabric exhibits excellent biodegradability, hemocompatibility, cytocompatibility, antibacterial activity, and wound healing promotion. Seepage can be an issue in haemostatic dressings. Here, the authors combine anionic and cationic nanofibers, which can absorb surface blood and form a seal, encapsulating blood components and forming a rapid thrombus while remaining biocompatibility and biodegradation properties.