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

The invention discloses an injectable medical wound dressing with an antibacterial function, which belongs to the field of medical biological materials. The dressing provided by the invention comprises aminated hyaluronic acid, nitrosated acetylcysteine-grafted chitosan and benzaldehyde terminated polyethylene glycol, a wound surface can be covered by injection, especially an irregular wound surface of a deep part, the dressing has good self-healing performance, can prolong the service life of the wound dressing, and reduces secondary damage caused by replacement of the wound dressing. The dressing has good biocompatibility, can continuously release nitric oxide in a physiological environment so as to play a role in bacteriostasis and promote angiogenesis, and has the potential of promoting repair of refractory wounds such as diabetic foot ulcer.

The invention relates to a formaldehyde scavenging agent prepared from corn protein and a preparation method thereof and belongs to the technical field of formaldehyde scavenging agents. The preparation method comprises the following steps: with corn protein as a raw material, adding water the mass of which is 3-4 times that of the corn protein, and uniformly stirring; adding acid proteinase the mass of which is 2%-5% of that of the corn protein for performing enzymolysis, and adding an oxidizing agent the mass of which is 1%-3% of that of the corn protein for oxidizing after enzymolysis; adding a discoloring agent the mass of which is 1%-3% of that of the corn protein, and heating to 80-95 DEG C for discoloring; filtering at the temperature of 90-95 DEG C after discoloring, thereby obtaining filtrate, namely a corn protein solution; and cooling, crystallizing, and drying, thereby obtaining the formaldehyde scavenging agent. The formaldehyde scavenging agent prepared by the method is capable of effectively scavenging formaldehyde and is environmental-friendly, wide in application range, low in preparation cost and easy and convenient to use, and is free of secondary pollution.

The invention discloses a wear-resistant waterproof fabric and a process thereof. The wear-resistant waterproof fabric comprises an antibacterial breathable layer, the upper surface of the antibacterial breathable layer is compounded with a wear-resistant layer, the upper surface of the wear-resistant layer is coated with a waterproof layer, the upper surface of the waterproof layer is fixedly connected with a plurality of wear-resistant strips, the wear-resistant strips are arrayed on the waterproof layer at intervals, and the sections of the wear-resistant strips are arched. Due to the fact that the wear-resistant strips are arranged, when a raincoat is in contact with the outside, direct contact between the fabric and the outside is reduced, and the overall wear resistance is improved. Due to the fact that the wear-resistant strips are in an arch shape, the wear-resistant strips have a certain anti-scratching effect while being resistant to wear. By adopting the antibacterial breathable layer, the fabric is antibacterial and breathable, and the problem that an existing raincoat fabric is poor in wear resistance, stuffy and airtight is solved.

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.