73results about How to "Improve antibacterial durability" patented technology

The bamboo viscose fiber preparing process includes the steps of preparing bamboo material, cutting, screening, washing, pre-treatment, digestion, eliminating sand, concentration, chlorination, alkali refining, bleaching, acid treatment, eliminating sand and concentration, fishing, soaking, squeezing, crushing, ageing, yellowing, grinding, dissolving, filtering, defoaming, filterin,g spinning, drafting, cutting, post-treatment, drying and packaging. The bamboo viscose fiber thus prepared is antibacterial, cool, smooth, fine and bright, and the present invention creates a new field for developing viscose fiber products.

The invention is concerned with the preparation method for new povidone iodine anit-bacterium dressing that uses the carboxymethyl chitosan to fix. The graft of the carboxymethyl chitosan (Polyacrylates - copolymer - N - vinylpyrrolidone) dissolves in water and processes complexation with iodine, reduces pressure and distillation to wipe off the solvent and part of un-reactive iodine, uses normal heptanes to marinate and wash the produce in order to wipe off the un-reactive iodine, processes freeze drying and crushing to get the new povidone iodine anit-bacterium dressing that uses the carboxymethyl chitosan to fix: t he graft of the carboxymethyl chitosan (Polyacrylates - copolymer - N - vinylpyrrolidone).

The invention discloses an antibacterial conductive fiber and a preparation method thereof. The antibacterial conductive fiber comprises a skin layer containing an antibacterial agent and a resin matrix, and a core layer containing an antibacterial agent, a conductive component and a resin matrix, wherein the content of the antibacterial agent is gradually reduced from the skin layer to the core layer, the area of the radial section of the core layer is gradually reduced by extending from the geometric center of the radial section of the fiber to the skin layer, at least three extending ends are formed, and the ends of the extending ends on the radial section are all curves with certain curvatures. The core layer of the provided antibacterial conductive fiber adopts the special-shaped section, so that electrostatic charges generated by the composite fiber in friction are concentrated at the extending ends of the core layer, the charges are dissipated by utilizing a point discharge phenomenon, and an antibacterial agent gradient formed from the core layer to the skin layer provides a lasting antibacterial effect for the fiber.

The invention discloses a method for preparing antibacterial coating by mugwort, mugwort oil is used for microcapsule coating, solid mugwort oil is prepared and used in a core layer and a shell layer of core-shell emulsion polymerization, a cross-linking agent is used for core-shell cross linking, the mugwort oil is controlled to release slowly, and nanometer materials and a cationic emulsifier are used for enhancing the antibacterial effect. The method for preparing the antibacterial coating by the mugwort solves the technical problems that the mugwort oil is coated, the solid mugwort oil is formed and and used in the core layer and the shell layer of core-shell type acrylic resin, the nanometer materials, the cationic emulsifier and a natural antibacterial agent are used for achieving a synergistic effect, the mugwort oil is controlled to release slowly, and the antibacterial property of the acrylic resin is improved.

The invention discloses a dendritic electrostatic spinning/electret composite nanofiber membrane filter material. The material is composed of the following raw materials of, by weight, 75 to 90 parts of polythioetherimide, 7 to 13 parts of silicon monoxide, 10 to 16 parts of powdered activated carbon, 2 to 3 parts of a 3-aminopropyltriethoxysilane coupling agent, 0.8 to 2 parts of glacial acetic acid, a proper amount of deionized water, 4 to 7 parts of metatitanic acid, a proper amount of a 0.6 mol/L AgNO3 solution, a proper amount of N-methyl pyrrolidone, 0.5 to 2 parts of dibutyl phthalate and 1 to 3 parts of tetra-n-propylammonium chloride. Silicon nanowires containing alpha-quartz are prepared, the electrostatic spinning/electret composite fiber filter material is prepared through the electrostatic spinning technique and has the excellent electric charge storage performance, and the filter efficiency of the filter material is greatly improved. In addition, nano-silver is added, nano-titanium dioxide is loaded, the antibacterial endurance property of the filter material is improved, and the long-time high-efficiency filter effect is achieved.

The invention discloses a gelatin/polyetherimide compound electret fiber filtration material prepared through electrostatic spinning. The gelatin/polyetherimide compound electret fiber filtration material is prepared from, by weight, 65-80 parts of polyetherimide, 10-18 parts of gelatin, 6-11 parts of silicon oxide, 9-16 parts of powdery activated carbon, 1-3 parts of 3-aminopropyl triethoxy silane coupling agent, 0.8-2 parts of glacial acetic acid, a proper amount of ionized water, 3-6 parts of metatitanic acid, 0.6 mol/L AgNO3 solution, a proper amount of N-methylpyrrolidone and 0.8-2 parts of acetic acid. Alpha-quartz-containing silicon nanowires are prepared by adopting the material, the gelatin/polyetherimide compound electret fiber filtration material is prepared through an electrostatic spinning technology and has excellent charge storage stability, and the filtering efficiency of the filtration material is greatly improved. In addition, nano silver is added and nano titanium dioxide is loaded to improve the antimicrobial persistence performance of the filtration material and to achieve a long-term and efficient filtration effect.

The invention relates to a preparation method of an antibacterial polyester. The method comprises the steps that (1) antibacterial agent is melt blended with polyester to obtain a blend, the antibacterial agent is hydroxybenzoic acid and ester derivatives thereof, and the polyester contains terminal hydroxyl groups and the terminal carboxyl groups; (2) a solid phase reaction is conducted on the blend under vacuum conditions, which allows the antibacterial agent to be combined with the polyester through covalent bond, and the solid phase reaction temperature is 80-190 DEG C. 24-hour bacteriostasis rate of finally obtained antibacterial polyester against staphylococcus aureus and Escherichia coli is >=99%, the 24-hour bacteriostasis rate against the staphylococcus aureus and the Escherichiacoli after the antibacterial polyester is washed 50 times with water is 95%, and after the antibacterial polyester is illuminated for 12 hours by ultraviolet ray of intense of 70 MuW/cm<2>, the 24-hour antibacterial rate against the staphylococcus aureus and the escherichia coli is 98%. The preparation method is simple, the antibacterial agent reacts covalently with polyester molecular chains through low-temperature solid phase viscosity increasing, and excellent antibacterial properties are obtained while the quality of the polyester is ensured.

The invention discloses a preparation method of nano-bamboo charcoal antibacterial fibers for pets, and relates to the technical field of textiles. According to the method, modified starch and nano-silver are organically combined, so that the nano-silver cannot be easily aggregated, dissolution and dispersibility of the nano-silver in carrier slices are improved, and the nano-silver has good antibacterial effects. A prepared active addition agent has adhesive property and more active groups, the nano-silver is connected with the fibers through a chemical bond, and the adhesiveness of the nano-silver on the fibers is improved, so that the antimicrobial durability of the fibers is prolonged. The prepared bamboo charcoal fibers have excellent moisture absorption performance, abrasion resistance and excellent antibacterial performance and are applicable to making of pet clothes, and bamboo charcoal is provided with renewable resources, wide in source, economical and environmentally friendly.