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

The invention relates to preparation of nanometer graphene oxide modified cotton fibers and an antibiosis product thereof, wherein the preparation comprises that: (1) graphite oxide is prepared; (2) the graphite oxide and a cross-linking agent are put in a beaker, deionized water is added, and ultrasonic processing is performed to obtain a uniformly dispersed graphene oxide solution; and (3) preparation of an antibiosis product adopts a two dipping and two rolling technology. The nanometer graphene oxide modified cotton fibers and the antibiosis product thereof have characteristics of simple preparation, low cost, good security, broad-spectrum and high efficiency antibacterial property, excellent launderability and excellent permeability.

The invention discloses a high molecular weight guanidine salt and polybasic amine antibiosis type polymer and a preparation method and the application thereof. The polymer comprises a repeated unit structure as right, wherein, X1 and X2 are the same or different polybasic amines; Y is Cl<->, NO3<->, HCO3<-> or H2PO4<->; Z is polyprotic acid, polyprotic acid anhydride or multielement ester. When in preparation, the mixture of polynary amine and guanidine salt is heated for reaction, and then polyprotic acid, polyprotic acid anhydride or multielement ester is added, and the temperature is continuously raised for reaction. The invention solves the problem that the polybasic amine and the guanidine salt react through a main body, thereby being difficulty to obtain a higher molecular weight polymer. In lower reaction temperature and shorter reaction time, by the chain expanding reaction to a polynary amine and guanidine salt prepolymer by the polyfunctionality substance, the high molecular weight guanidine salt and polybasic amine antibiosis polymer is formed. The polymer can be used as the anti fungus agent of the fiber product, the paper product, the non-weaving product and the tissue, etc.

The invention discloses application of a two-dimensional lysozyme nanometer film as an antibacterial material. According to the invention, the two-dimensional lysozyme nanometer film is used as the antibacterial material and it only needs to grow the two-dimensional lysozyme nanometer film on the surface of a substrate in situ during preparation of the two-dimensional lysozyme nanometer film or directly adhering the two-dimensional lysozyme nanometer film onto the surface of the substrate, and the two-dimensional lysozyme nanometer film can grow on the surfaces of substrates of different shapes in situ or adhere onto the surfaces of substrates of different shapes. As the antibacterial material, the two-dimensional lysozyme nanometer film has broad-spectrum and high-efficiency antibacterial properties, has a broadened spectrum of resisting bacteria including Gram-positive bacteria, Gram-negative bacteria and fungi compared with conventional classical Gram-positive bacteria and shows good antibacterial efficiency to the Gram-positive bacteria, Gram-negative bacteria and fungi, wherein antibacterial efficiency of the Gram-positive bacteria, Gram-negative bacteria and fungi all reach 90% or more within 2 h; the two-dimensional lysozyme nanometer film has good adhesion on a protected substrate and no toxicity and adsorptivity to cells, so the two-dimensional lysozyme nanometer film has good anti-fouling property to cells; and the two-dimensional lysozyme nanometer film can be used as an ideal antibacterial food packaging material and a medical application program material.

The invention discloses an antibacterial (methyl) acrylate monomer containing pyridine quaternary ammonium salt and a carbamate structure as well as a preparation method and application of the antibacterial (methyl) acrylate monomer. The antibacterial (methyl) acrylate monomer containing the pyridine quaternary ammonium salt and the carbamate structure, prepared with the preparation method disclosed by the invention, can be taken as an antibacterial additive for methyl vinyl silicone rubber. The monomer is characterized by containing a (methyl) acrylate structure with reaction activity, and can participate in vulcanization in the vulcanization process of the methyl vinyl silicone rubber and form chemical bonding with the methyl vinyl silicone rubber, thereby endowing the methyl vinyl silicone rubber with the long-acting antibacterial property; meanwhile, the normal use of the silicone rubber is also not affected.

The invention discloses a flame-retardant polypropylene material as well as a preparation method and application thereof. The flame-retardant polypropylene material is prepared from the following rawmaterials in terms of 100 parts by mass: 72-85 parts of copolymerization polypropylene resin, 8-15 parts of brominated flame retardant-antioxidant 1010 compound, 3-6 parts of antimonic flame retardant, 1-3 parts of titanium dioxide, 0.5-1.2 parts of lubricant, 1-2 parts of antistatic agent, 0.5-1.2 parts of antioxidant and 0.3-1 part of antibacterial agent. The flame-retardant polypropylene has agood antistatic effect, has a surface resistance of 108-109 omegas, is high in glossiness, does not produce flame retardant precipitate, has a flame retardant rating of UL94V-0, and has the advantagesof being capable of inhibiting bacterial growth for a long time, being good in antibacterial effect and the like. The preparation method is simple and efficient, easily guarantees flame retardance and high-brightness white color of the material, and is high in production efficiency.

The invention provides a disulfide bond crosslinked gelatin/epsilon-polylysine active food packaging film and a preparation method thereof. The preparation method comprises the following steps: firstly, chemically covalently grafting a sulfhydryl compound onto a gelatin molecular chain skeleton to prepare sulfhydrylated modified gelatin; and adding epsilon-polylysine into the sulfhydrylated modified gelatin solution, uniformly mixing the solutions, pouring the mixed solution into a mold, and drying at room temperature to prepare the disulfide bond crosslinked gelatin/epsilon-polylysine activefood packaging film. According to the gelatin-based active food packaging film and the preparation method thereof, by means of the method that grafted sulfydryl is oxidized in air to form disulfide bonds and antibacterial polypeptide epsilon-polylysine is added, the prepared gelatin-based active food packaging film has high mechanical strength, good ultraviolet blocking capacity, biodegradability,high antibacterial performance and effective oxidation resistance. Therefore, the disulfide bond crosslinked gelatin/epsilon-polylysine active food packaging film provided by the invention has a wideapplication prospect in the field of food packaging materials.