8results about How to "High antibacterial efficiency" patented technology

This invention discloses a method for preparing and applying an antibacterial composite coating based on quaternized zinc oxide nanoparticles. The preparation method includes: grafting quaternary ammonium salt compounds onto the surface of zinc oxide nanoparticles to prepare synergistic antibacterial nanoparticles; modifying the substrate surface by co-deposition of dopamine and polyethyleneimine to introduce active functional groups; and spraying or dipping the quaternized zinc oxide nanoparticles onto the modified substrate surface to obtain the antibacterial composite coating. This novel antibacterial material preparation scheme can integrate the advantages of zinc oxide nanoparticles and quaternary ammonium salts, while solving key technical problems such as nanoparticle aggregation, weak interfacial bonding, and limited antibacterial efficiency. It is of great significance for promoting the upgrading of hygiene and safety in the fields of medicine, food, and building materials.

This invention discloses a periodontitis-targeted antibacterial supramolecular material, its preparation method, and its application. It belongs to the field of catalyst technology. The preparation method of the periodontitis-targeted antibacterial supramolecular material includes the following steps: dissolving 2,5-dihydroxyterephthalic acid and tetrakis(4-aminophenyl)porphyrin in a first solvent, adding a first catalyst to react, and obtaining a DHA-TAPP COF skeleton; dispersing the DHA-TAPP COF skeleton in a second solvent, adding 3-bromopropyltrimethylammonium bromide and a second catalyst to react, and obtaining Q-COF; dispersing Q-COF in a third solvent, mixing it with H2PtCl6 solution, and then placing it under light conditions to obtain Pt-Q-COF; dispersing Pt-Q-COF in a buffer solution, adding pyruvate oxidase for adsorption treatment, and obtaining POx-Pt-Q-COF. This invention achieves a synergistic effect of "targeted enrichment - dual ROS generation - closed-loop H2O2 supply" through material structure design and functional unit integration, thereby improving the clearance efficiency of periodontal pathogens while ensuring biocompatibility.

The present application belongs to the technical field of functional materials, and particularly relates to a coated carbon nanotube composite material and a preparation method thereof, and a functional polymer composite material and a preparation method thereof. The coated carbon nanotube composite material provided by the present application has a core-shell-shell structure coated in turn from inside to outside, wherein the carbon nanotube constitutes an inner core providing mechanical enhancement and an electrically conductive path, a silver layer coated on the surface of the carbon nanotube serves as an intermediate layer and a first antibacterial component, a copper oxide nanoparticle layer coated on the surface of the silver layer serves as an outer shell layer and a second antibacterial component, and the copper oxide layer and the silver layer form a heterojunction. The specific structure produces a synergistic effect of silver, copper oxide and carbon nanotube, so that the composite powder has the functions of high-efficiency antibiosis, antistatic and mechanical enhancement.

This invention discloses a high-gloss antibacterial ceramic glaze and its preparation method, relating to the field of ceramic glaze technology. By weight, its raw material composition includes: 75-85 parts of base glaze, 8-10 parts of antibacterial system, 6-10 parts of nucleating agent, 3-8 parts of colorant, 1.5-3 parts of auxiliary agent, 0.2-1.5 parts of functional additive, and 0.5-1.5 parts of nano-glossing agent. The functional additive is a compound of graphene quantum dots, quaternary ammonium salt modified montmorillonite, and rare earth carbonates in a weight ratio of (0.02-0.08):(0.1-0.3):(0.1-1). This ceramic glaze achieves a balance of high gloss, efficient and long-lasting antibacterial effect, and excellent glaze quality.

This application discloses a method for preparing antibacterial functional graphene nanocolloids, belonging to the field of graphene technology. Using micron-sized flake graphite with an average lateral dimension of 1-10 μm and a thickness of less than 1 μm as raw material, the raw material undergoes pretreatment with an acidic ammonium sulfate aqueous solution, followed by a three-stage temperature-controlled oxidation process, with hydrogen peroxide added in two steps. After solid-liquid separation, washing, drying, and short-time calcination, a functional graphene oxide intermediate is obtained. The intermediate is dispersed with a biocompatible dispersant and then sequentially subjected to high-shear emulsification, two-stage milling, high-speed mixing under nitrogen protection, and high-pressure microfluidic circulation treatment to obtain a transparent nanocolloid. The product has a lateral dimension D50 of 90-110 nm, 2-3 layers, an oxygen content of 10-15 atomic percent, and excellent antibacterial properties, making it applicable to antibacterial coatings, biomedical equipment, wound dressings, water treatment membranes, and food packaging materials.

This invention belongs to the field of acrylic fabric technology. This invention provides a preparation process for antibacterial acrylic fabric, comprising: dispersing modified nanocellulose and silver-loaded carbon spheres in an acrylic dosing solution to obtain a spinning solution; spraying the spinning solution into a coagulation bath through a spinning head, whereby coagulation forms nascent fibers; and subjecting the nascent fibers to stretching, washing, oiling, drying, and weaving to obtain the antibacterial acrylic fabric. This invention introduces modified nanocellulose and silver-loaded carbon spheres into acrylic fibers. Modified nanocellulose has excellent specific surface area and dispersibility, enabling it to effectively load antibacterial components as a carrier. The silver-loaded carbon spheres utilize the broad-spectrum antibacterial properties of silver ions, fixing silver ions on the surface and interior of the porous carbon spheres through physical adsorption and chemical bonding, preventing the loss of silver ions and thus achieving durable antibacterial properties. The introduction of this dual antibacterial mechanism results in an antibacterial acrylic fabric with significant antibacterial effects, effectively inhibiting the growth and reproduction of various bacteria.

The invention provides a polyformaldehyde antibacterial mildewproof master batch and a preparation method thereof.The polyformaldehyde antibacterial mildewproof master batch comprises polyformaldehyde resin, a long-carbon-chain alkyl glycidyl ether modified guanidine salt polymer anti-harmful-microorganism material, a main antioxidant, an auxiliary antioxidant, a formaldehyde absorbent, a deacidification agent, a lubricant and a dispersant.The preparation method comprises the steps that after the components are evenly mixed according to the proportion, the mixture is put into a mold, and the mold-proof master batch is obtained; adding the mixture into a double-screw extruder; and under the protection of inert gas, carrying out melt blending on the blended materials through a twin-screw extruder, and granulating to obtain the polyformaldehyde antibacterial and mildew-proof master batch. The polyformaldehyde antibacterial and mildewproof master batch is applied to manufacturing of polyformaldehyde plastic products with antibacterial and mildewproof functions, the addition amount of the polyformaldehyde antibacterial and mildewproof master batch is 2-10% of that of a polyformaldehyde resin base material, and the prepared antibacterial and mildewproof polyformaldehyde plastic products have excellent antibacterial, mildewproof and dissolution-resistant properties, lasting antibacterial and mildewproof effects, safety and the like.

The invention relates to the technical field of microorganisms, in particular to bacillus velezensis SCSX39 and application thereof. The bacillus velezensis SCSX39 is classified and named as bacillus velezensis, and is preserved in the China General Microbiological Culture Collection Center on September 15, 2025, and the preservation number of the bacillus velezensis SCSX39 is CGMCC (China General Microbiological Culture Collection Center) No. 35918. The strain is a safe strain, can show strong inhibitory activity on various mango anthracnose pathogenic bacteria and globulosporium of colletotrichum, and has an inhibitory effect on growth of various food-borne pathogenic bacteria from food sources such as steamed buns and sauces, and potential multifunctional application prospects of the strain are indicated. The invention provides a special and efficient core strain resource for green prevention and control of anthracnose and the like after mango harvesting, provides an important strain material for development of novel microbial source pesticides, and has important significance for mango industry development.