31results about How to "High antibacterial efficiency" patented technology

The invention provides antibacterial polypropylene plastic, and aims to obtain a composite antibacterial agent with the advantages of an inorganic antibacterial agent and an organic antibacterial agent by compounding the inorganic antibacterial agent and the organic antibacterial agent, and the antibacterial polypropylene plastic which is good in antibacterial property, good in migration resistance, good in mechanical property, good in mechanical property, good in mechanical property and the like is obtained by adding the obtained composite antibacterial agent into the polypropylene plastic. The invention discloses antibacterial polypropylene plastic with long-acting antibacterial property.

The invention relates to the technical field of preparation of antibacterial gloves, in particular to a preparation method of degradable breathable antibacterial gloves, and an emulsion formula of the degradable breathable antibacterial gloves comprises the following components in parts by weight: 100 parts of nitrile rubber modified polylactic acid, 5-10 parts of modified antibacterial filler, 1-3 parts of an anti-aging agent, 0.5-3 parts of a vulcanizing agent, 0.3-2 parts of a vulcanization accelerator and 0.5-1 part of a foaming agent. Through a high-molecular compound composition system, nitrile rubber modified polylactic acid, modified antibacterial filler and other components are compounded to prepare the glove with controllable degradability, lasting antibacterial property and good air permeability; on the basis of covalent binding of silicon dioxide loaded with antibacterial groups and modified chitosan, the synergistic antibacterial effect of the modified antibacterial filler is achieved, and therefore the antibacterial performance of the glove is improved.

The invention provides a photodynamic and chemotherapy synergistic antibacterial composite material, the composite material comprises an intermediate composite material and hyaluronic acid HA coating the outer side of the intermediate composite material, and the intermediate composite material takes a photosensitizer i-ZnPPOPs as a substrate and is loaded with calcium peroxide and gentamicin. The composite material has excellent bacteria targeting characteristic and antibacterial effect. Specifically, hyaluronic acid can target hyaluronidase secreted by bacteria so as to capture the bacteria, and then the intermediate composite material is transferred to the surfaces of the bacteria and interacts with negatively charged bacterial membranes. Then, the exposed biomass-based CaO2 is released and reacts with water to generate H2O2 and O2, so that oxygen deficit of the infected wound surface is relieved, generation of < 1 > O2 in the i-ZnPPOPs is effectively promoted, and the photodynamic antibacterial effect is further improved. Meanwhile, the released gentamicin can further improve the antibacterial efficiency of the chemotherapy.

The invention relates to the technical field of PVC materials, in particular to an antibacterial medical PVC material and a preparation method thereof. The antibacterial medical PVC material is prepared from the following raw materials in parts by weight: 70 to 100 parts by weight of PVC resin, 10 to 30 parts by weight of plasticizer, 8 to 16 parts by weight of filler, 2 to 4 parts by weight of stabilizer, 1 to 3 parts by weight of coupling agent, 0.5 to 2 parts by weight of lubricant, 1 to 3 parts by weight of epoxy linseed oil, 0.2 to 0.8 part by weight of antioxidant 1010 and 5 to 12 parts by weight of antibacterial composite additive. The adopted antibacterial composite additive is formed by compounding an antibacterial agent and modified graphene, the prepared medical PVC material has good antibacterial performance and mechanical performance, meanwhile, the technological operation is simple, the production cost is low, meanwhile, the medical PVC material has good processing performance, the application prospect is wide, and the medical PVC material is suitable for popularization and application. The method is widely applied to the field of medical application.

The invention discloses a dsRNA nano preparation for preventing and controlling phytophthora capsici as well as a preparation method and application of the dsRNA nano preparation. The nucleotide sequence of the phytophthora capsici sugar transporter protein HXT4 gene is as shown in SEQ ID NO.1, and the ASPN-dsRNA nano preparation is obtained by mixing dsRNA as shown in SEQ ID NO.2 and amino-modified mesoporous silica. By exogenous application of the ASPN-dsRNA nano preparation, gene expression silencing of the target gene phytophthora capsici sugar transporter HXT4 is induced, so that pathogenicity of phytophthora capsici is reduced or even lost, and the purpose of protecting crops is achieved. The preparation can effectively reduce the pathogenicity of phytophthora capsici, the inhibition rate on phytophthora capsici infection can reach 72%, and the prevention and control efficiency on phytophthora capsici reaches 87%. The ASPN-dsRNA nano preparation is high in stability and obvious in prevention and control effect, and provides a new prevention and control strategy and means for developing a precise prevention and control method for crop epidemic diseases.

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.

The present invention provides an aminohydantoin Schiff base 4-pyridine quaternary ammonium salt precursor compound and its preparation method and application, which belongs to the synthesis and application technical field of quaternary ammonium salt Schiff base halamine high-efficiency composite antibacterial agent. Aminohydantoin hydrochloride, 4-pyridine formaldehyde and propylene bromide are used as raw materials to prepare an aminohydantoin Schiff base 4-pyridine quaternary ammonium salt precursor compound. And, the application process of the precursor compound is to pretreat the fiber or fabric with 3-mercaptopropyltriethoxysilane, then arrange it with the precursor compound, and finally halogenate it to obtain an antibacterial material. The method of the present invention has mild reaction conditions, simple process and good antibacterial effect. The 1-ADPAH-R antibacterial agent synthesized by the method and its halamine precursor combine the advantages of multiple antibacterial structures, so that the antibacterial agent has water solubility, is easy to operate when preparing the antibacterial material, and can prepare an antibacterial material with excellent antibacterial properties.

The invention discloses an antibacterial coating material and a preparation method thereof as well as a surgical suture and a preparation method thereof, and belongs to the field of medical materials. The preparation method comprises the following steps: grafting a quaternary ammonium salt group and a catechol group to chitosan, modifying the chitosan, and reacting the modified chitosan with silver nitrate to generate nano-silver. Modified chitosan is adopted as a reducing agent and a stabilizing agent, a stable nano-silver solution is formed under irradiation of light containing ultraviolet rays, the surface of an existing mainstream surgical suture main body is coated with a chitosan nano-silver composite material, and the surgical suture with the good antibacterial effect is obtained. According to the antibacterial coating material and the preparation method thereof as well as the surgical suture and the preparation method thereof, the antibacterial effect can be improved, the preparation method is simple, the process condition is mild, and the antibacterial coating material is suitable for large-scale production.

The invention discloses an epsilon-polylysine modified TiO2 (at) Au Jauns core-half shell structure nanometer material as well as a preparation method and application thereof. The epsilon-polylysine modified TiO2 (at) Au Jauns core-half shell structure nanometer material is characterized in that a layer of semigold shell grows on a TiO2 nanometer microsphere core plated with a gold atom layer, and epsilon-polylysine is modified on the outer side of the TiO2 nanometer microsphere core. The preparation method comprises the following steps: plating a layer of Au on a TiO2 nano-microsphere by using an ion sputtering instrument, growing a layer of semi-gold shell on a gold atom layer through sodium ascorbate (AA) reduction in a HAuCl5 aqueous solution, and modifying epsilon-polylysine. The nano material disclosed by the invention can be actively targeted to a cell membrane through epsilon-polylysine, and has a very good antibacterial effect.

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 invention provides a compounding method and application of a plant extract with antibacterial effect, and relates to the technical field of natural plant extracts. The plant extracts are compounded in pairs by alopecuroides alopecuroides extract, a Mongolian allium extract and an oblique stem astragalus extract to prepare alopecuroides-Mongolian allium compound, a Mongolian allium-oblique stem astragalus compound and alopecuroides-oblique stem astragalus compound; the alopecuroides-Mongolian allium compound is prepared by alopecuroides extract and a Mongolian allium extract in a volume ratio of 1:1; the Mongolian allium-oblique stem astragalus compound is prepared by alopecuroides extract and an oblique stem astragalus extract in a volume ratio of 1:1; the alopecuroides-oblique stem astragalus compound is prepared by alopecuroides extract and an oblique stem astragalus extract in a volume ratio of 1:1; and the alopecuroides-oblique stem astragalus compound is prepared by alopecuroides extract and an oblique stem astragalus extract in a volume ratio of 1:1. After compounding the three plant extracts of alopecuroides, Mongolian allium and oblique stem astragalus in pairs, the bacterial concentration is significantly reduced, and the antibacterial efficiency of the three plant extracts is effectively improved.

The invention discloses a polylactic acid fiber antibacterial membrane as well as a preparation method and application thereof, and relates to the technical field of fiber filtering membranes. The polylactic acid fiber antibacterial film comprises first fibers, second fibers and antibacterial particles, the first fibers and the second fibers are stacked randomly, and the antibacterial particles are loaded on the surfaces of the first fibers and the second fibers; wherein the diameter ratio of the first fibers to the second fibers is 1: (11-30), and the average diameter of the antibacterial particles is 10-100 nm; the first fiber and the second fiber both comprise polylactic acid, and the antibacterial particles are made of titanium dioxide and / or modified titanium dioxide. The components and the structure of the polylactic acid fiber antibacterial film are limited, so that the polylactic acid fiber antibacterial film has excellent antibacterial efficiency and filtering efficiency.

The invention discloses a preparation method of a cinnamyl aldehyde loaded silicon dioxide nano antibacterial agent, relates to a preparation method of a nano antibacterial agent, and aims to solve the technical problem that the antibacterial effect is influenced due to the fact that the conventional cinnamyl aldehyde antibacterial agent is easy to volatilize and poor in water solubility. The preparation method comprises the following steps: adding silicon dioxide into an alcohol solution of cinnamyl aldehyde, heating to boil, carrying out reflux reaction, and then centrifugally separating out a precipitate, thereby obtaining the cinnamyl aldehyde loaded silicon dioxide nano antibacterial agent. When the concentration of the nano-antibacterial agent is 0.4-1g / L, the diameter of an inhibition zone of the nano-antibacterial agent to staphylococcus aureus is about 30-55mm, and the diameter of an inhibition zone of the nano-antibacterial agent to escherichia coli is about 27-45mm. The method can be used in the field of antibacterial agents.

The present invention relates to an antibacterial additive based on cross-linked antibacterial polymer particles and a method for producing the same, a vinyl chloride resin composition and a molded product. The antibacterial additive of the present invention includes cross-linked antibacterial polymer particles, which contain at least one unit selected from unit A and unit B, a unit based on vinyl chloride and a unit based on a cross-linking monomer, unit A is selected from at least one of the units shown in the following formula (A1) and the units shown in the following formula (A2): unit B is selected from at least one of the units shown in the following formula (B1), the units shown in the following formula (B2) and the units shown in the following formula (B3): wherein R1 to R4 are each independently hydrogen or an alkyl group having 1 to 12 carbon atoms, X is independently selected from at least one of -O-, -S-, and -NR5-, R5 is hydrogen, Y, an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 6 to 12 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and Y is a group having an antibacterial group.

The present invention relates to the field of denture base materials, and provides a 3D printing high-strength oral denture base and a preparation method thereof. The denture base is prepared from the following components: titanium oxide composite microspheres coated with chitosan, surface modified boron nitride nanotubes coated with nano-silver particles, acrylic resin, polyetheretherketone, anhydrous ethanol, defoamer, dispersant, and photoinitiator. Preparation method: S1. Disperse fillers, and prepare a uniform mixed solution by ultrasonic and mechanical stirring; S2. Prepare a resin base liquid, add acrylic resin, polyetheretherketone and other materials and stir evenly; S3. Print and form, and use a DLP light-curing 3D printer to print the denture base; S4. Finishing, including demoulding, cooling and surface grinding treatment, finally obtaining a finished denture base. The present invention solves the strength and antibacterial problems of the denture base by combining titanium oxide composite microspheres with chitosan coating layers and surface modified boron nitride nanotubes coated with nano-silver particles, respectively, and has a wide range of application value.

The invention belongs to the technical field of oral bacteriostasis, and particularly relates to a disinfection and bacteriostasis oral spray and a preparation method thereof. The disinfection and bacteriostasis oral spray comprises a liquid component and a solid component, the liquid component is prepared from the following components in parts by volume: 1 to 20 parts of PEG-40 hydrogenated castor oil, 1 to 20 parts of 1, 2-propylene glycol, 0.1 to 5 parts of chamomile essential oil, 0.1 to 5 parts of lavender essential oil, 0.1 to 5 parts of mint essential oil, 0.1 to 5 parts of tea tree essential oil and 20 to 90 parts of water; on the basis of the mass of 20-90 parts by volume of water, the solid component is prepared from the following components in parts by mass: 0.1-5 parts of tannic acid, 0.1-5 parts of L-arginine and 0.1-20 parts of a flavoring agent. The tannic acid and various plant essential oils can synergistically improve the antibacterial effect of the oral spray, and the diameter of the inhibition zone of the composite essential oil microemulsion added with the tannic acid is obviously larger than that of the single tannic acid solution and the single composite essential oil microemulsion.

The invention relates to a preparation process of a mildew-proof antibacterial self-cleaning coating. The preparation method comprises the following steps: preparation of a waterborne polyurethane emulsion, synthesis of waterborne polyurethane (WPU-TNO) of TNO, preparation of an antibacterial mildew-proof fatting agent through esterification reaction, preparation of dendritic mesoporous silica, modification of the dendritic mesoporous silica by APTES, preparation of a silica-loaded nano-silver antibacterial agent, and preparation of nano TiO2 self-cleaning hydrosol. According to preparation of the silicon dioxide loaded nano-silver / TiO2 self-cleaning / WPU-TNO antibacterial coating, an emulsification method and a lipidation method are creatively combined, the prepared material shows a good self-cleaning function and excellent antibacterial and mildew-proof performance, and the silicon dioxide loaded nano-silver / TiO2 self-cleaning / WPU-TNO antibacterial coating has the advantages of being stable, environmentally friendly, biosafe, excellent in self-cleaning function, mildew-proof, antibacterial and the like.

The invention discloses an antistatic antibacterial polypropylene composite membrane material and a preparation method thereof, and belongs to the technical field of membrane materials. The preparation method comprises the following steps: a, preparing a polyketone spinning solution, and carrying out electrostatic spinning to obtain a polyketone nanofiber membrane; b, modifying the polyketone nanofiber membrane by adopting polydopamine and silver nitrate to obtain a modified polyketone nanofiber membrane loaded with silver nanoparticles; c, putting the polypropylene granules into a mold frame, and carrying out hot pressing through a press vulcanizer to form a polypropylene film; and d, stacking the modified polyketone nanofiber membrane loaded with the silver nanoparticles on a polypropylene membrane, putting the polypropylene membrane and the modified polyketone nanofiber membrane into a mold frame, and carrying out hot press molding through a press vulcanizer to obtain the anti-static antibacterial polypropylene composite membrane material. The antibacterial efficiency, barrier property and impact resistance of the polypropylene composite film material are greatly improved, the polypropylene composite film material also has an antistatic function, meanwhile, the addition amount of silver nanoparticles in the composite film is reduced, and the cost is effectively reduced.

The present invention relates to an antibacterial additive based on a non-crosslinked antibacterial polymer and a method for producing the same, a vinyl chloride resin composition and a molded product. The antibacterial additive of the present invention comprises: a non-crosslinked antibacterial polymer comprising at least one unit selected from unit A and unit B and a unit based on vinyl chloride, wherein unit A is selected from at least one of the units represented by the following formula (A1) and the units represented by the following formula (A2); unit B is selected from at least one of the units represented by the following formula (B1), the units represented by the following formula (B2) and the units represented by the following formula (B3): wherein R1 to R4 are each independently hydrogen or an alkyl group having 1 to 12 carbon atoms, X is independently selected from at least one of -O-, -S-, and -NR5-, R5 is hydrogen, Y, an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 6 to 12 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and Y is a group having an antibacterial group.

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.

The invention discloses packaging paper with hydrophobic, antibacterial and writing functions and a preparation method thereof. The preparation method comprises the following steps: S1, mixing a monomer, an initiator, cellulose pulp and water, and uniformly stirring to obtain a mixed solution; s2, heating the mixed solution to carry out copolymerization reaction, and cooling to room temperature after the reaction is finished to obtain a copolymerization solution; s3, dopamine hydrochloride and a Tris-HCl buffer solution are added, stirring is carried out under the room temperature condition, and cellulose pulp deposited with polydopamine and a copolymer is obtained; s4, performing suction filtration to obtain formed cellulose paper; and S5, drying the cellulose paper, soaking the cellulose paper in water, soaking the cellulose paper in an aqueous solution containing 1-octylsulfonic acid ions and silver ions, washing the cellulose paper with water, drying the cellulose paper, and performing ultraviolet light reduction to obtain the packaging paper with hydrophobic, antibacterial and writing functions. According to the invention, the packaging paper with hydrophobic, antibacterial and writing functions can be prepared without an organic solvent and a fluorine-containing reagent.

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.

The invention discloses a self-assembly preparation method and application of multi-enzyme active nano-zinc oxide for treating salmonella enteritis, a trace amount of oleylamine is added as a protective agent, a self-assembly nano-enzyme is synthesized by a simple method, and the direct antibacterial effect of ZnO is improved; the minimal inhibitory concentration of ZnO synthesized by the same method in vitro is 250 [mu] g / mL, the minimal inhibitory concentration of ZnO doped with trace Cu and Mn is about 30 [mu] g / mL, and the bacteriostatic efficiency is improved by about 8 times; trace elements of copper (Cu) and manganese (Mn) are doped into a ZnO nano material, so that the ZnO nano material is endowed with various enzyme activities, peroxidase activity is exerted under the acidic condition of the stomach to generate bactericidal active oxygen, and superoxide dismutase and catalase activity for resisting oxidative stress are exerted when the ZnO nano material reaches neutral intestinal tracts, so that inflammation of the intestinal tracts is relieved; the traditional Chinese medicine composition can play a role in the acidic state of the stomach, can relieve inflammation of the intestinal tract in the intestinal tract, and can completely adapt to the environment of the gastrointestinal tract.

The present invention provides an antibacterial BOPP film and a preparation method thereof, wherein the BOPP film comprises an antibacterial base film, a reinforced antibacterial upper surface film, and a reinforced antibacterial lower surface film, wherein the antibacterial base film is located between the reinforced antibacterial upper surface film and the reinforced antibacterial lower surface film. The antibacterial BOPP film of the present invention is composed of an antibacterial base film, a reinforced antibacterial upper surface film, and a reinforced antibacterial lower surface film, wherein 1,2-benzisothiazolin-3-one antibacterial agent is added to the antibacterial base film, the reinforced antibacterial upper surface film, and the reinforced antibacterial lower surface film, thereby forming an antibacterial pathway vertically and improving the antibacterial efficiency; meanwhile, modified silicone microspheres are added to the reinforced antibacterial upper surface film and the reinforced antibacterial lower surface film, so that the antibacterial agent is evenly dispersed in the system, thereby improving the antibacterial performance of the film layer as a whole.

The invention discloses a modified ceramic masterbatch and a preparation method thereof. The modified ceramic masterbatch is composed of the following components in parts by weight: 90-100 parts of a ceramic matrix, 3-5 parts of an active ingredient, 0.8-1.2 parts of polyvinyl alcohol, and 0.3-0.7 parts of silicon dioxide nanoparticles. The modified ceramic masterbatch enhances the mechanical strength and antibacterial properties of the material by fusing a high-performance ceramic matrix with active ingredients, such as cephaladin and silver nanoparticles, using polyvinyl alcohol as a dispersant and silicon dioxide nanoparticles as a flux. Precise sintering processes and plasma spraying technologies further improve the compactness and surface activity of the masterbatch, ensure the effective release of the active ingredients, and enable it to show a wide range of application potentials in the fields of medical treatment, biomedicine, and environmental purification.

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.

The invention discloses a method for producing medical cotton swabs through multi-stage disinfection and sterile packaging. According to the antibacterial cotton swab disclosed by the invention, the antibacterial agent ensures that the nano-silver particles are uniformly dispersed and stably combined on the cotton swab material through a precise preparation process, and the beneficial effects of the antibacterial agent are maximized: the elaborately designed formula can provide a continuous antibacterial effect, and the large specific surface area of the nano-silver particles ensures that the nano-silver particles are in full contact with microorganisms; the addition of triclosan and quaternary ammonium salt enhances the antibacterial spectrum and is effective to various pathogens, and the slow-release carrier can effectively control the release rate of the antibacterial agent in the preparation process, so that the antibacterial agent can continuously play a role in a relatively long time; the slow-release carrier enables the antibacterial agent to be slowly released on the surface of the cotton swab or in the cotton swab, so that the antibacterial effect can be kept for a longer time, the need of frequently replacing disinfection products is reduced, and the stability of the antibacterial agent is enhanced.

The invention discloses a preparation method of a BOPP composite shrink film, and relates to the technical field of packaging materials, the BOPP composite shrink film comprises an outer layer, a base layer and a heat sealing layer; the outer layer comprises composite antibacterial particles, a liquid coupling agent, an antioxidant, a dispersing agent, a heat stabilizer, metallocene co-polypropylene, smooth master batch and POE; the base layer comprises polypropylene, a stiffening master batch and an antistatic master batch; the stiffening master batch comprises a mixture of hydrogenated petroleum resin and homo-polypropylene; composite antibacterial particles; the heat-sealing anti-sticking layer is prepared from polypropylene and titanium dioxide anti-sticking master batch; the toughness of the film can be improved, the composite antibacterial particles are uniformly distributed in the two layers, a more uniform antibacterial layer is formed, and the situation that the antibacterial effect is too strong or too weak locally is avoided, so that the overall antibacterial efficiency is improved.

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.