30results about How to "Broad-spectrum high-efficiency antibacterial properties" patented technology

The invention discloses an application of a lysozyme two-dimensional nano-film as an antibacterial material. According to the application, the lysozyme two-dimensional nano-film serves as the antibacterial material, the lysozyme two-dimensional nano-film is formed on the surface of a substrate through in-situ growth only during the preparation of the lysozyme two-dimensional nano-film, or the prepared lysozyme two-dimensional nano-film is directly adhered to the surface of the substrate and can be formed on surfaces of substrates of various shapes through in-situ growth or adherence. Accordingto the application, the lysozyme two-dimensional nano-film serves as the antibacterial material and has broad-spectrum and efficient antibacterial performance, an antibacterial spectrum can be extended to three species of bacteria, i.e., gram-positive bacteria, gram-negative bacteria and fungi from category I bacteria of Classic gram-positive bacteria, the lysozyme two-dimensional nano-film presents good antibacterial efficiency to the three species of bacteria, and the antibacterial efficiency basically can reach 90% or more in 2 hours; the lysozyme two-dimensional nano-film has good adhesivity to substrates to be protected and is free of toxicity and adsorptivity to cells; and thus, the lysozyme two-dimensional nano-film has good antifouling properties to the cells and can serve as an ideal antibacterial food packaging material and a medical application program material.

The invention relates to a traditional Chinese medicine for curing burns, scalds and chronic fester and a preparation method thereof, belonging to the technical fields of a drug for curing burns, scalds and chronic fester and a preparation method thereof. The traditional Chinese medicine is prepared from the raw materials of 200-300 parts of lithospermum, 80-120 parts of Chinese angelica, 60-80 parts of radix angelicae, 300-500 parts of raw sanguisorba, 2000-3000 parts of sesame oil and 100-150 parts of Chinese wax. The preparation method comprises the following steps: 1) cleaning the raw materials, and removing impurities; 2) grinding the lithospermum, the Chinese angelica, the radix angelicae and the raw sanguisorba into fine powder, and filtering by a 300-meshed sieve; 3) pouring the powdery medicine into the sesame, and decocting for 1-3 hours until the powdery medicine becomes brown, adding the Chinese wax, heating while stirring, and boiling for 1-3 hours; and 4) naturally cooling the boiled liquor. The traditional Chinese medicine has the effective rate up to 100%, the recovery rate up to over 97% and good curative effect.

The invention discloses a pH responding type polyoxazoline-nano silver layer by layer self-assembly multilayer film and a preparation method thereof. The self-assembly film can prevent adhesion, has apH responding property, and can controllably release nano silver (an antibacterial agent). The preparation method comprises following steps: at first preparing a functional monomer 2-(2-methoxycarbonyl)ethyl-2-oxazoline, then preparing anionic polyoxazoline (Pox) with negative charges through copolymerization reactions; at the same time, reducing silver ions by utilizing catechol grafted chitosanto obtain nano silver composite sol (CCS-AgNPs); and alternatively assembling polyoxazoline with negative charges and nano silver with positive charges by a static layer by layer self-assembly methodto obtain the multilayer film with a pH responding property. The provided multilayer film can prevent the adhesion of bacteria, and can release nano silver to kill bacteria under the irritation of weak acids, and the functions of bacterium inhibiting and bacterium killing are integrated.

The invention discloses a nano-antibacterial anti-corrosion coating and a preparation method thereof, which belong to the field of chemical materials. The nano-anti-bacterial anti-corrosion coating consists of two components, A and B. The A component consists of polyether glycol, castor oil, polyaniline nano It is prepared by the reaction of fiber, toluene diisocyanate and n-butanol. The B component includes castor oil and stannous octoate; the A and B components are mixed according to the mass ratio of 2~5:1 to obtain the nano antibacterial anticorrosion coating. The coating has stable quality and is easy to construct. Simple, with high-efficiency antibacterial and anti-corrosion properties. At the same time, the coating has broad-spectrum bactericidal properties, good light and heat resistance, and has the characteristics of safety and no pollution to the environment; it can be widely used in long-distance oil, natural gas, water and other metals The inner wall of the pipeline is especially suitable for antibacterial and anticorrosion fields of chemical oil storage tanks.

The invention provides a disulfide bond cross-linked gelatin / ε - Polylysine active food packaging film and preparation method thereof. In the present invention, firstly, the mercapto compound is chemically covalently grafted onto the molecular chain skeleton of gelatin to prepare mercapto-modified gelatin, and then added to the mercapto-modified gelatin solution ε ‑Polylysine, mix the above solution evenly, pour it into a mold, and dry it at room temperature to prepare disulfide cross-linked gelatin / ε ‑Polylysine active food packaging film. The invention forms disulfide bonds and adds antibacterial polypeptides through the oxidation of grafted sulfhydryl groups in the air ε ‑Polylysine method, the gelatin-based active food packaging film prepared has high mechanical strength, good ultraviolet blocking ability, biodegradability, strong antibacterial performance and effective antioxidant performance. Therefore, the disulfide cross-linked gelatin / ε ‑Polylysine active food packaging film has broad application prospects in the field of food packaging materials.