61results about How to "Play a role in antibacterial" patented technology

The invention discloses a porous water absorbing material and relates to the field of materials. The porous water absorbing material is prepared from the following components in parts by mass: 20 parts of azodicarbonamide, 11 parts of polycarbonate, 4 parts of crotonate grafted chitosan, 37 parts of nano hydroxyl calcium phosphate / polycaprolactone / polylactic acid, 30 parts of a polylactic acid-polybutylene succinate-polylactic acid triblock copolymer and 20 parts of magnetic Fe3O4 / Ag nanoparticles. The porous water absorbing material has a lot of pore structures, has a relatively great absorbing ability, can absorb a lot of immersion liquid, and has a good water retention property, and natural volatilization of water can be reduced greatly.

The invention discloses an injectable medical wound dressing with antibacterial function, which belongs to the field of medical biological materials. The dressing of the present invention comprises aminated hyaluronic acid, chitosan grafted with nitrosated acetylcysteine, and benzaldehyde-capped polyethylene glycol, which can cover wounds by injection, especially irregularities in deeper parts. wound, and has good self-healing properties, which can prolong its use time and reduce secondary injuries caused by changing wound dressings. The dressing has good biocompatibility and can continuously release nitric oxide in a physiological environment, thereby playing an antibacterial role, while promoting angiogenesis, and has the potential to promote the repair of difficult-to-heal wounds such as diabetic foot ulcers.

The invention discloses a preparation method of an antibacterial polysaccharide hemostatic cotton based gauze. The method comprises the following steps: firstly, preparing a quaternized polyethyleneimine and a hydroformylation polysaccharide cross-linking agent which have an anti-bacterial function; and then mixing and foaming the quaternized polyethyleneimine, the hydroformylation polysaccharide cross-linking agent and chitosan hydrochloride, uniformly coating the surface of a preprocessed gauze with foaming liquid, and carrying out freeze drying to obtain the antibacterial polysaccharide hemostatic cotton based gauze. After being compounded, polysaccharide hemostatic cotton and the preprocessed gauze are combined closely, do not fall off, have high intensity, and are suitable for compression hemostasis and binding at wounds. Moreover, compared with a common gauze, the antibacterial polysaccharide hemostatic cotton based gauze has the effects of inhibiting growth of microorganisms and inhibiting bacteria when stopping bleeding. In addition, a sponge coating the surface of the gauze uses safe and nontoxic polysaccharide as the cross-linking agent, so that the intensity and the blood stopping effect of the hemostatic cotton based gauze are further improved.