Antibacterial microspheres with a bionic red-blood-cell like hollow structure and superior swelling recovery capacity for efficient traumatic hemostasis

•A bionic red blood cell like microspheres with controllable surface morphology.•The microspheres are microporous structure on the surface and hollow structure inside.•The microspheres formed physical barrier in wound by facilitate aggregations of blood.•The microspheres exhibit hemostasis, antibacterial and histocompatibility performance.