4results about How to "Has antibacterial effect" patented technology

The application discloses a composite solid decoloring powder and a preparation method thereof, and belongs to the technical field of water treatment agent preparation. The modified nano titanium dioxide is obtained by coating titanium dioxide with 3-methyl acrylic acid sulfopropyl potassium salt grafted polydopamine. The titanium dioxide has photocatalytic effect and antibacterial property, can catalytically decompose pollutants in sewage, inhibit the breeding of bacteria in water, and can catalytically decompose free formaldehyde in dicyandiamide formaldehyde polycondensate. The modified nano titanium dioxide is loaded on phenolic resin foam, and after calcination, the nano titanium dioxide / foam carbon powder is formed. The large specific surface area and porous property of the foam carbon can increase the capture and fixation of free formaldehyde, and can synergistically accelerate the catalytic degradation of formaldehyde with the titanium dioxide. The dicyandiamide formaldehyde polycondensate grafted with castor oil is in-situ polymerized on the surface of the matrix. The castor oil grafting can significantly improve the dicyandiamide formaldehyde polycondensate, significantly increase the molecular weight, and increase the capture capacity.

The utility model discloses antibacterial dacron cotton cloth relates to textile technical field, and its technical scheme main points are: the inside layer is close to the side weaving of outer layer and is formed with support strip no.

The utility model discloses a kind of science and technology cloth of inhibiting microbial growth, including base cloth layer and antibacterial waterborne polyurethane coating;Base cloth layer includes bottom comb and face comb, the yarn used in bottom comb is antibacterial microdenier polyester filament, the yarn used in face comb is antibacterial nylon filament;Base cloth layer has the fluff formed by raising hair on the side surface of face comb, fluff extends to the inside of antibacterial waterborne polyurethane coating;The side surface of base cloth layer away from antibacterial waterborne polyurethane coating is compounded with plane three-way fabric;Plane three-way fabric is interwoven by three groups of bacteriostatic core-spun yarn according to 60 ℃ angle, bacteriostatic core-spun yarn includes core yarn and bacteriostatic fiber layer covered on the outside of core yarn. Base cloth layer uses antibacterial filament, the coated is antibacterial waterborne polyurethane, the bacteriostatic fiber layer used in plane three-way fabric layer, so that the science and technology cloth has bacteriostatic effect. And plane three-way fabric can provide isotropic tensile effect.

This application specifically discloses a method for preparing carboxymethyl chitosan with a wide molecular weight distribution and its application in hemostasis and repair, comprising the following steps: dispersing chitosan in anhydrous ethanol, adding glacial acetic acid, stirring, adding benzaldehyde, stirring, then adding sodium hydroxide solution and stirring, separating the solid and liquid, washing, and obtaining a wet material; adding the wet material to an ethanol-water solution under cold water bath conditions, adding a strong alkali solution, adding chloroacetic acid solution to react, adding carboxymethyl chitosan to the ethanol-water solution, then adding hydrochloric acid to obtain a powder; dividing the powder into three equal parts, adding hydrogen peroxide solution to anhydrous ethanol, adding the first part of the powder, stirring for 1-1.5 h, then adding the second part of the powder, continuing the reaction for 2-2.5 h, separating the solid and liquid, mixing with the third part of the powder, adding pure water, adding manganese dioxide, stirring, filtering, and drying to obtain the final product. The carboxymethyl chitosan of this application has a wide molecular weight distribution and excellent hemostatic and repair properties.