4077 results about "Anti bacteria" patented technology

The invention provides a solar interface evaporator based on amphoteric polyelectrolyte photo-thermal hydrogel, a preparation method and application, and belongs to the field of solar interface evaporation. The solar interface evaporator with a three-dimensional multi-surface evaporation structure is prepared by combining the polyelectrolyte resisting effect of the amphoteric polyelectrolyte photo-thermal hydrogel and the porous capillary effect of the sponge, and has the characteristics of high light absorptivity, good water absorption effect, excellent antibacterial property, mechanical property, salt resistance, evaporation property and the like; particularly, compared with a traditional hydrogel-based solar interface evaporator, the water delivery capacity and the salt resistance in high-concentration saline water are greatly improved through the application of the autonomously designed zwitterionic hydrogel, water molecules in the saline water are activated through the cooperation of salt-resistant ionized water, the evaporation enthalpy is reduced, and the evaporation efficiency is improved. And a great positive effect is achieved on improvement of the evaporation rate. The evaporator is easy to prepare and excellent in multi-dimensional performance, and a new way and thought are provided for application to seawater desalination and wastewater treatment.

The invention belongs to the technical field of ceramic glaze, and particularly discloses antibacterial ceramic glaze and a preparation method thereof.The ceramic glaze is prepared from, by mass, 60-75 parts of basic glaze, 1-3 parts of nanometer titania, 2-6 parts of cosolvent, 0.5-3 parts of ochre, 5-10 parts of curcumin, 1-3 parts of stabilizer, 1-5 parts of rare earth antibacterial agent and 1-3 parts of sodium polyacrylate, and 1-6 parts of a composite additive. According to the antibacterial ceramic glaze and the preparation method thereof, the antibacterial performance, glossiness and smoothness of a glaze surface are improved, the crystal structure of the glaze can be refined through introduction of rare earth ions, the hardness of the glaze surface is enhanced, the wear resistance of a ceramic product is effectively improved, and the service life of the ceramic product is prolonged. Stable chemical bonds are formed in the glaze due to the special chemical properties of the rare earth elements, the resistance of the glaze to chemical substances such as acid and alkali is enhanced, and the chemical corrosion resistance of the ceramic glaze is improved.

The invention discloses a polypropylene composite material based on rare earth element modification and a preparation method and application thereof, and belongs to the technical field of medical instruments, and the polypropylene composite material comprises the following raw materials in parts by weight: 100 parts of medical grade PP, 3-8 parts of a rare earth organic complex, 5-10 parts of nano-hydroxyapatite, 2-5 parts of a maleic anhydride grafted PP compatilizer and 0.3-0.5 part of an antioxidant, the invention also provides specific preparation steps and application thereof. According to the invention, oxide + salt bimorphological rare earth and an organic ligand are complexed to form a rare earth organic complex, so that the problem of poor dispersity of inorganic rare earth is solved, and meanwhile, the material is endowed with antibacterial and antistatic functions; through a melt blending-in-situ fiber forming process, the rare earth complex forms gradient distribution in a polypropylene matrix, the surface layer is enriched with antibacterial components, and the inner layer is enhanced in mechanical property, so that a low-cost solution with high strength, antibacterial property and biocompatibility is provided for high-end medical instruments, and the market blank is filled.

This application relates to an EPP material and a folding mat using this EPP material, which relates to the field of EPP material technology. The EPP material is formed into a plate by welding EPP particles, and the surface of the plate is coated with a hydrophobic antibacterial paint. The raw materials for preparing the EPP particles include 80-100 parts by weight of polypropylene resin, 1-3 parts by weight of a nucleating agent, 6-8 parts by weight of a modified graphene composite material, 5-10 parts by weight of a flame retardant, 5-15 parts by weight of a reinforcing agent, and 0.5-1.5 parts by weight of a surfactant. The raw materials for preparing the modified graphene composite material include hydrophobic modified graphene oxide, hydrophobic antibacterial nano-zinc oxide, and a modified ammonium polyphosphate coupling agent. The folding mat using this EPP material includes an EPP material, a surface layer, and a sewing thread, and the surface layer and the EPP material are fixedly connected by the sewing thread. This application has the effect of improving the flame retardancy, waterproofness, and antibacterial properties of EPP material, and the resulting tatami mat is environmentally friendly, comfortable, and has a good user experience.

The invention relates to the technical field of textiles, and discloses a cool and washable bio-based nylon 56 fabric and a preparation method thereof. The preparation method of the cool and washable bio-based nylon 56 fabric comprises the following steps: loading modified nano aluminum oxide on modified aluminum nitride microchips to obtain a composite cool material; nylon 56, an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, polypentamethylene guanidine hydrochloride and a composite cool feeling material are subjected to blending extrusion and melt spinning, and then the bio-based nylon 56 fabric is woven. Mixing the composite modified boron nitride and ethanol to obtain finishing liquid; spraying the finishing liquid on one side of the bio-based nylon 56 fabric, and drying to obtain the cool washable bio-based nylon 56 fabric. The cool and washable bio-based nylon 56 fabric disclosed by the invention has excellent cool feeling, antibacterial property, washable property, moisture absorption property and unidirectional perspiration property.

The invention discloses a high-strength polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-strength polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of high-density polyethylene, 25 to 35 parts of linear low-density polyethylene, 12 to 18 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of nano silicon dioxide, 3 to 7 parts of organic montmorillonite, 1.5 to 3.5 parts of hindered amine light stabilizer, 1.5 to 2.5 parts of antioxidant 1010, 0.8 to 1.2 parts of calcium stearate, 0.8 to 1.2 parts of zinc stearate, 0.8 to 1.2 parts of silane coupling agent and 4 to 6 parts of maleic anhydride grafted polyethylene. The composite material is prepared from the following components in parts by weight: 1.5-3.5 parts of a quaternized chitosan-nano silver compound, 6-9 parts of a modified toughening agent, 4-7 parts of a modified heat-resistant agent, 1.5-3.5 parts of a processing aid, 0.15-0.35 part of dibenzoyl peroxide and 0.5-1.5 parts of a nucleating agent DBS. The composite material is excellent in comprehensive performance, high in strength, good in flexibility and puncture resistance, excellent in aging resistance, heat resistance, chemical resistance and antibacterial property, good in processability, capable of meeting the requirements of multiple fields such as packaging and agriculture, scientific in preparation method and high in practical value.

The invention relates to the field of building materials, and discloses a multifunctional foamed ceramic sound insulation and heat preservation material for buildings. Comprising the following raw materials in parts by weight: 42 to 48 parts of pottery clay tailings, 14 to 16 parts of fly ash, 10.5 to 12 parts of crushed stone materials, 2.8 to 3.2 parts of a silicon carbide foaming agent, 0.7 to 0.8 part of a borax fluxing agent, 7 to 8 parts of paraffin / silicon dioxide phase change microcapsules, 0.5 to 1.0 part of graphene, 2.0 to 2.5 parts of nano iron powder, 0.05 to 0.5 part of nano silver, 1.0 to 1.5 parts of photocatalytic titanium dioxide and 0.3 to 0.4 part of a fluorosilane coupling agent. A stable matrix structure is constructed through the argil tailings, the fly ash and the crushed stone materials, the silicon carbide foaming agent and the borax fluxing agent reduce the heat conductivity coefficient, the sound insulation performance is improved, the material is endowed with the antibacterial ability through nano-silver and photocatalytic titanium dioxide, indoor sanitation is guaranteed, and a super-hydrophobic layer is constructed through the fluorosilane coupling agent.

The invention discloses a flame-retardant high-temperature-resistant fiber and a preparation method thereof, and relates to the technical field of fibers. When the flame-retardant high-temperature-resistant fiber is prepared, 1, 6-hexamethylenediamine, 1, 6-adipic acid, tetrahydrodifuran [3, 4-B: 3 ', 4'-D] furantetraone and a phosphorus-sulfur composite flame retardant are copolymerized to generate a polyamide-polyamide acid solution; 4-aminopyridine and the polyamide-polyamide acid solution are subjected to a reaction, and modified polyamide is prepared; the modified polyamide is subjected to melt spinning, and polyamide fibers are prepared; the preparation method comprises the following steps: pretreating nano titanium dioxide by using 4-bromobutyl trimethoxy silane to prepare modified nano titanium dioxide; mixing the modified nano titanium dioxide and ethanol to prepare a light-resistant antibacterial finishing agent; and carrying out post-treatment on the polyamide fiber by using an anti-light antibacterial finishing agent to prepare the flame-retardant and high-temperature-resistant fiber. The prepared fiber is excellent in comprehensive performance, particularly outstanding in flame retardance and high temperature resistance, and suitable for the fields of special protective clothing, high-temperature filtering materials and the like.

The invention belongs to the field of environment-friendly materials, and particularly discloses a method for preparing a high-performance exterior wall flame-retardant material from waste plastics. Through a unique formula, for example, waste polyethersulfone and the like are used as base materials, a waste basalt fiber and MOF derived carbon nanosheet composite reinforced phase, multiple novel flame retardants and the like are added, and innovative processes including pulsed electric field treatment, carbon dioxide supercritical fluid assistance and the like are combined, so that the material performance is remarkably improved. The tensile strength, the thermal stability, the flame retardant property and the like of the material are greatly enhanced, the material also has multiple functions of flexibility, self-cleaning, antibiosis and the like, and a new way is provided for high-value utilization of waste plastics and performance optimization of exterior wall materials.

The invention relates to a polyurethane foam technology in the technical field of medical dressings, in particular to medical silver-containing porous polyurethane foam. The composite material comprises a foam matrix, the foam matrix adopts gradient layering design and comprises a matrix inner layer, a matrix middle layer and a matrix outer layer, the aperture of each layer is sequentially increased, the porosity is gradually increased layer by layer, the matrix inner layer is provided with randomly dispersed inner-layer hollow silver-loaded fibers capable of slowly releasing silver ions for bacteriostasis, the matrix middle layer is fixedly provided with pH response microcapsules, and the pH response microcapsules are fixed on the matrix outer layer. In an alkaline environment, antibacterial peptides are released for synergic antibiosis, and silver-loaded fibers in the outer layer of the matrix outer layer are arranged in the radial direction to form a flow guide channel and release silver ions. Through gradient layered design, different sterilization structures are added, the temperature-sensitive hydrogel layer covering the surface of the outer layer of the base body is matched, sterilization and seepage are managed through environmental changes, and the advantages of being excellent in antibacterial performance, high in seepage management capacity, intelligent in adjustment and the like are achieved.

The invention relates to the field of super-hydrophobic materials, in particular to a basalt fiber composite material as well as a preparation method and application thereof. According to the composite fabric material provided by the invention, a multistage micro-nano rough surface of the MoS2 nanoflowers and the silver nanoparticles is constructed on the fiber substrate, so that not only is super-hydrophobic self-cleaning realized, but also the anti-icing performance is relatively high, and particularly, rapid heating is realized by combining broadband absorption of the MoS2 nanoflowers and a local surface plasma resonance effect of the silver nanoparticles; and meanwhile, the silver nanoparticles accelerate heat conduction, so that excellent ice melting capability is obtained. The high conductivity of the silver nanoparticles constructs a conductive path, and the layered structure of MoS2 triggers interface polarization, so that the electromagnetic shielding effectiveness of the X wave band is improved. The dual antibacterial mechanism of the MoS2 nanoflowers and the silver nanoparticles also realizes broad-spectrum efficient antibiosis, the preparation method is green and environment-friendly, the cost is low, and the requirements of complex scenes such as wearable electronic equipment, medical protection, polar region protection and national defense can be met.

The invention discloses a PA6 nylon composite material for a high-temperature-resistant filter screen and a preparation method of the PA6 nylon composite material, and relates to the technical field of composite materials. The invention discloses a PA6 nylon composite material for a high-temperature-resistant filter screen. The nylon material is prepared from the following raw materials in parts by weight: 60 to 80 parts of modified PA6 nylon, 10 to 20 parts of modified glass fiber, 2 to 5 parts of montmorillonite, 0.3 to 0.8 part of antioxidant 1010, 0.2 to 0.6 part of stearic acid, 0.5 to 1.0 part of ethoxylated fatty amine, 1 to 3 parts of nano titanium dioxide, 1 to 3 parts of polytetrafluoroethylene micro powder, 3 to 8 parts of aluminum hydroxide, 0.5 to 1.5 parts of chitosan, 1 to 3 parts of hyperbranched polyamide and 0.5 to 1.5 parts of urea-formaldehyde resin coated epoxy resin microcapsules. And 0.3 to 0.8 part of sodium polyacrylate. The PA6 nylon composite material for the high-temperature-resistant filter screen has remarkable advantages. The material disclosed by the invention is high in mechanical property, good in thermal stability and stable in size at high temperature; the self-cleaning, antibacterial and antistatic functions are realized, and the filtering efficiency is high; chemical corrosion resistance, wear resistance and low water absorption are achieved; part of the raw materials can be recycled, the environmental protection concept is met, and the use requirement of the high-temperature-resistant filter screen in a complex environment can be met.

The invention provides a gamma-cyclodextrin-based metal organic framework composite material as well as preparation and application thereof. The metal organic framework composite material based on gamma-cyclodextrin comprises chitosan, gamma-CD-MOFs (Metal Organic Frameworks) and an active substance. The preparation method comprises the following steps: by taking chitosan as a film material base material, synthesizing gamma-CD-MOFs by utilizing a hydrothermal method, and then loading cinnamyl aldehyde with antibacterial property, 2-methoxycinnamyl aldehyde with ultraviolet light resistance and curcumin with an antioxidant effect into the gamma-CD-MOFs. And finally, mixing with chitosan with better film-forming property, and spraying on glass or the surfaces of fresh fruits. The gamma-CD-MOFs has the characteristic of slowly releasing bioactive substances, is non-toxic and is a material capable of being applied to food packaging.

The invention provides a nitrogen-doped biomass-based fluorescent carbon quantum dot, a preparation method and application, and relates to the technical field of carbon nanomaterials, the method comprises the following steps: mixing a biomass material and deionized water under an ultrasonic condition, adding a nitrogen source, and carrying out ultrasonic dispersion to obtain a uniformly dispersed to-be-reacted solution; reacting the to-be-reacted solution at a preset temperature for a preset time to obtain a mixed product solution; and filtering and dialyzing the mixed product solution to obtain the nitrogen-doped biomass-based fluorescent carbon quantum dot solution. The nitrogen-doped biomass-based fluorescent carbon quantum dot prepared by the method shows a stable fluorescent effect and good water solubility, the free radical clearance rate can reach 90% or above, and the antibacterial rate can reach 99% or above. The method can be used in the fields of drug sustained release, bioimaging and the like.

The invention relates to the field of film materials, and discloses a degradable antibacterial film material and a preparation method thereof.The film material comprises degradable matrix resin, a modified additive, a plasticizer and a lubricant; the modified additive is prepared by loading a natural antibacterial agent on a modified flame-retardant composite filler; the modified flame-retardant composite filler is prepared by reacting cinnamyl aldehyde with a flame-retardant composite filler and forming a complex with zinc acetate dihydrate; the flame-retardant composite filler is prepared by reacting epoxidized composite filler with 1, 5-naphthalene diamine and then further reacting with phytic acid; according to the invention, the natural antibacterial agent is loaded in the modified flame-retardant composite filler through a vacuum impregnation method, and the mechanical property, antibacterial property and flame-retardant property of the material are enhanced by adding the modifying additive, so that the flame-retardant and antibacterial composite material has the advantages that the flame-retardant and antibacterial properties of the material are improved, and the service life of the material is prolonged. Meanwhile, diffusion / permeation of gas and water molecules in the film is adjusted.

The invention discloses a carbon-doped titanium dioxide nanotube-molybdenum disulfide energy-storage antibacterial material and a preparation method thereof. The preparation method comprises the following steps: carrying out primary anodic oxidation on a clean titanium foil in a mixed electrolyte of ethylene glycol, water and ammonium fluoride; after ultrasonic treatment is carried out in a hydrochloric acid solution for set time, secondary anodic oxidation is carried out, and the mixed electrolyte of the secondary anodic oxidation is the same as that of the primary anodic oxidation; annealing the titanium foil subjected to anodic oxidation twice in an argon atmosphere, putting an annealed sample into a mixed solution of sodium molybdate, a sulfur source and glucose, and carrying out hydrothermal treatment; and the titanium foil subjected to hydro-thermal treatment is cleaned and dried, and the carbon-doped titanium dioxide titanium foil with the surface covered with molybdenum disulfide is obtained. The MoS2-coated carbon-doped titanium dioxide nanotube (TNT-C-atMoS2) with high biocompatibility developed by the invention has a synergistic effect of charge antibiosis and chemical sterilization, so that the problem of intractable biological fouling of a titanium-based metal material in ocean engineering equipment is effectively solved.

The invention relates to the field of coating materials, and provides a high-wear-resistance stainless steel-based composite coating which is composed of dumbbell-shaped silver-doped silicon carbide, sea urchin-shaped titanium dioxide, 304 stainless steel powder, NiCrBSi nickel-based autolytic alloy powder and the like. The silver-doped silicon carbide is prepared through sol-gel, high-temperature carbonization and acid pickling, and the titanium dioxide filler is obtained through hydrothermal synthesis and calcination. Supersonic flame spraying deposition is adopted, the compactness and bonding strength are enhanced through laser remelting, and finally the wear resistance, the pollution resistance and the antibacterial performance are improved through vacuum annealing, mechanical polishing and hydrophobic coating modification. The design of dumbbell-shaped silver-doped silicon carbide and urchin-shaped titanium dioxide is adopted, high-wear-resistance, antibacterial and high-binding-force coating performance is achieved, the problems of wear resistance and bacteriostasis are solved, and the coating is suitable for the fields of cabinet door plates and the like.

The invention discloses a household nano self-cleaning material containing rare earth elements and a preparation method of the household nano self-cleaning material, and aims at solving the problems that a traditional self-cleaning material is narrow in light response range, single in function, poor in durability, non-environment-friendly in preparation process and the like. The material comprises 5-15 parts of rare earth oxide, 50-70 parts of nano titanium dioxide, 10-20 parts of mesoporous silica, 3-8 parts of a fluorinated modifier and 2-5 parts of a bio-based adhesive. Wherein the rare earth elements are doped in titanium dioxide crystal lattices, so that the forbidden band width is reduced, the photocatalytic response range is widened to visible light, and the photocatalytic efficiency is remarkably improved. The preparation method of the material comprises the steps of precursor preparation, hydrothermal reaction, fluorination modification and coating forming, a low-temperature hydrothermal method, supercritical CO2 modification and a photocuring technology are adopted, and the material has the functions of self-cleaning, antibiosis and VOCs degradation, is suitable for various base materials such as household building materials, textiles and electric appliance surfaces, meets the composite requirements of modern home for health and environmental protection, and has wide application prospects. And the preparation process is green and pollution-free, and conforms to the sustainable development concept.

The invention relates to the technical field of medical supplies, and discloses an anti-puncture medical packaging film and a preparation method thereof. Comprising the following raw materials in parts by weight: an ethylene copolymer, modified aramid fibers, a reinforcing agent, an auxiliary agent, an antioxidant and an antistatic agent. The preparation method of the anti-puncture medical packaging film comprises the following steps: raw material blending, tape casting, film blank drying, stretching and shaping, and rolling. According to the technology, the modified aramid fibers are fully dispersed in the packaging film with the ethylene copolymer as the matrix, so that the puncture resistance of the packaging film is greatly improved, sharp objects are effectively prevented from penetrating through the packaging film, medical products are better protected, the damage risk of the products in the transportation and storage process is reduced, meanwhile, through modification, the service life of the packaging film is prolonged, and the service life of the packaging film is prolonged. The antibacterial performance is improved, and the medical material is more suitable for protection application of medical equipment.

The invention discloses a solar interface evaporator and a preparation method and application thereof. The evaporator comprises a porous cellulose supporting layer and a photo-thermal composite hydrogel layer loaded on the cellulose supporting layer, and the porous cellulose supporting layer and the photo-thermal composite hydrogel layer are combined in a gel in-situ cross-linking mode to form an integrated composite structure. The photo-thermal composite hydrogel layer is composite hydrogel formed by cross-linking polyvinyl alcohol, chitosan quaternary ammonium salt and carbon black. The preparation method comprises the following steps: adding polyvinyl alcohol and chitosan quaternary ammonium salt into a solvent to form a transparent mixed solution, adding the carbon-based photothermal conversion material, and continuously heating and stirring to prepare a hydrogel precursor solution; then adding glutaraldehyde and hydrochloric acid, and carrying out cross-linking reaction to form a hydrogel system; and immersing the cellulose sponge, standing, circularly and alternately freezing and unfreezing, and finally freeze-drying to obtain the product. The evaporator disclosed by the invention integrates highlight absorption, high heat utilization, water transportation, salt resistance and antibiosis, can realize large-scale production, and is suitable for scenes such as seawater desalination, sewage purification and emergency water supply.

The invention relates to the technical field of building decoration materials, in particular to a high-performance antibacterial mildew-proof sealant and a preparation method thereof. The sealant is prepared from the following raw materials in parts by weight: 20 to 30 parts of silane modified polyurethane, 40 to 50 parts of nano calcium carbonate, 20 to 30 parts of a plasticizer, 3 to 7 parts of a hydroxyl silane coupling agent, 0.4 to 0.8 part of a mildew preventive, 0.3 to 0.7 part of an ultraviolet light absorber, 0.3 to 0.7 part of a de-foaming agent and 0.8 to 1.2 parts of a first catalyst. The high-performance antibacterial and mildew-proof sealant has long-acting antibacterial and mildew-proof performance, and excellent mechanical performance and weather resistance of the sealant can be maintained, so that the requirements of industries such as building, medical treatment and food processing on high-performance, healthy and environment-friendly sealing materials are met; and the preparation method is simple and controllable, the production cost is relatively low, and large-scale production can be realized.

The invention belongs to the technical field of hot melt adhesives, and particularly relates to a polyurethane hot melt adhesive composition and application thereof. The polyurethane hot melt adhesive composition comprises the following components in parts by weight: 40-50 parts of polyester polyol; 20 to 25 parts of bio-based polyether polyol; 25 to 30 parts of bio-based isocyanate; 15 to 20 parts of functionalized polydopamine; 5-10 parts of a filler; 0.5 to 0.8 part of a catalyst; 0.5 to 1 part of a coupling agent; 1-3 parts of a chain extender; the bio-based polyether polyol and the bio-based isocyanate are added into the components of the polyurethane hot melt adhesive composition provided by the invention, so that the polyurethane hot melt adhesive composition is better in environmental protection performance, and the polyurethane hot melt adhesive is modified by adding the functionalized polydopamine; the polyurethane hot melt adhesive composition with good cohesiveness, mechanical property, water resistance, flame retardance and antibacterial property is prepared, and is suitable for use requirements in different fields.

The invention discloses a Janus cotton fabric with radiation refrigeration and antibacterial functions and a preparation method thereof.The preparation method creatively achieves multifunctional integration through multistage structural design and interface engineering and specifically comprises the steps that 1, a bionic silicon dioxide nano sheath layer grows on the surface of cotton fiber in situ through a controllable sol-gel method; the monodispersity of the nanoparticles is ensured by optimizing the ratio of the TEOS to the silane coupling agent; (2) introducing high-refractive-index nanoparticles to construct a dual-scale photonic crystal structure, and enhancing solar spectrum reflection by using a plasma resonance effect; (3) performing hydrophilic interface modification by adopting a biomacromolecule self-assembly technology to form a super-hydrophilic antibacterial layer; and (4) constructing a super-hydrophobic interface on the single side of the fabric through precise spraying, and finally forming a Janus structure with an asymmetric wetting gradient. The preparation process is mild in condition and high in controllability, and the obtained Janus fabric has excellent antibacterial performance (the antibacterial rate gt; 99.5%) and radiation refrigeration performance (daytime sub-environment temperature drop gt; 8 DEG C).

The invention discloses a rare earth antibacterial ceramic and a preparation method thereof, and belongs to the technical field of ceramic materials, the rare earth antibacterial ceramic comprises a base material, a rare earth antibacterial agent and an auxiliary additive, the base material is coated with a zirconium silicate coating layer; the matrix material is one of aluminum oxide or zirconium oxide, the rare earth antibacterial agent is a ternary composite oxide composed of at least three lanthanide elements, the lanthanide elements comprise Ce, Y, La and Nd, and the invention provides a preparation method of the composite material. Through collaborative innovation of ternary rare earth composite modification, zirconium silicate interface coating and a gradient sintering process, the core problems of single antibacterial spectrum, high-temperature failure and insufficient durability of traditional antibacterial ceramic are solved, and the antibacterial property, stability, biological safety and mechanical property are remarkably improved; and the method has clear technical progress and industrial application value.

The invention discloses a graphene antistatic PC composite material and a preparation method thereof, and belongs to the technical field of composite materials. 150-160 parts of polycarbonate resin, 10-20 parts of modified graphene, 2-5 parts of light stabilizer, 2-5 parts of ultraviolet absorber, and 2-5 parts of lubricant are weighed by weight and added to a high-speed mixer, and sent into a twin-screw extruder after mixing evenly, and after melt extrusion, cooled and pelletized to obtain a graphene antistatic PC composite material. The modified graphene contains graphene, quaternary ammonium salt structure and hindered phenol structure, and the modified graphene contains lipophilic benzene ring and long carbon chain, so the modified graphene has good compatibility with the polycarbonate resin containing benzene ring and other raw materials, and the modified graphene can be evenly dispersed in the composite material, and is not easy to agglomerate, so that the modified graphene can fully play a role, giving the composite material excellent antistatic, antibacterial and anti-aging properties.

The invention provides a waterproof and windproof warm-keeping fabric and a production process thereof, and relates to the technical field of textile fabrics, the waterproof and windproof warm-keeping fabric comprises a protective surface layer, a windproof temperature-locking middle layer and a skin-friendly warm-keeping inner layer which are sequentially arranged from outside to inside, and the three layers are compounded through a gradient hot melt adhesive; the protective surface layer is a graphene oxide modified polyester fiber fabric treated by a composite hydrophobic finishing liquid; the windproof temperature-locking middle layer sequentially comprises a non-swelling environment-friendly TPU film, a polytetrafluoroethylene microporous film and a Cs0. 33WO3 modified PA6 / 66 hollow fiber net from outside to inside, and the three are laminated and compounded into an integrated structure through hot pressing; and the skin-friendly warm-keeping inner layer is a bamboo pulp fiber-cotton-skin-friendly antibacterial polyester fiber blended fabric loaded with phase change microcapsules. The fabric disclosed by the invention integrates excellent waterproof, windproof and warm-keeping properties, is suitable for outdoor and cold-proof clothes, and has both functions and comfort.

The invention discloses a biodegradable polylactic acid composite material and a preparation method thereof, and relates to the technical field of polylactic acid materials. The method comprises the steps that firstly, chitosan activated through hydrochloric acid is subjected to graft modification through a KH550 silane coupling agent, meanwhile, nano-zinc oxide is subjected to surface modification through stearic acid, the chitosan and the nano-zinc oxide are mixed, spray drying is conducted, and antibacterial composite powder is prepared; the preparation method comprises the following steps: performing hydrochloric acid activation and KH570 silane coupling agent modification on nano silicon dioxide, performing hydroxypropylation modification on alkali lignin, and performing reflux crosslinking reaction on the modified alkali lignin, KH570 modified nano silicon dioxide, polycaprolactone, methyl methacrylate and azodiisobutyronitrile to prepare a heat-resistant reinforcer; uniformly mixing polylactic acid, poly (butylene succinate), the antibacterial composite powder, the heat-resistant reinforcer, tributyl citrate, polyethylene glycol and talcum powder, and extruding and granulating by using a twin-screw extruder to obtain the heat-resistant antibacterial material. The composite material prepared by the invention has excellent antibacterial property, heat resistance and biodegradability.

The present invention discloses a chitosan-modified highly transparent antibacterial polylactic acid film and a preparation method and application thereof. The polylactic acid film comprises the following raw materials by weight: 10 to 16 parts of modified chitosan, 35 to 55 parts of polylactic acid, 5 to 15 parts of casein, 50 to 300 parts of solvent and 30 to 50 parts of gelatin, wherein the solvent comprises hexafluoroisopropanol and acetic acid solution. The antibacterial polylactic acid film provided by the present invention has good toughness, strength and transparency, is suitable for the field of food packaging, can extend the shelf life of food, and can reduce plastic waste pollution.

The invention discloses a modified PET recycled material and a preparation method thereof, and belongs to the technical field of plastic recycling. Comprising the following raw materials in parts by weight: 70-90 parts of a pretreated PET reclaimed material, 8-24 parts of modified graphene oxide, 3-9 parts of an antioxidant and 3-5 parts of a lubricant. Wherein the antioxidant can achieve a synergistic effect, so that the oxidation resistance of the PET recycled material is greatly improved; wherein the modified graphene oxide has good compatibility with a PET matrix, and can play a synergistic effect with groups on the surface of the modified graphene oxide, so that the flame retardance, antibacterial property and certain heat resistance of the PET recycled material are remarkably enhanced; therefore, the PET recycled material is modified and recycled, the pollution of waste materials is reduced, the recycling of resources is realized, and the modified PET recycled material also has excellent oxidation resistance, stable and efficient flame retardance, antibacterial property and heat resistance to a certain degree, and has important application value in the technical field of plastic recycling.

The invention discloses an environment-friendly nano antibacterial PE (polyethylene) wood-plastic plate, which is prepared from wood flour, silane modified PE gel, glass fiber powder, nano cellulose, borax, acrylate resin and PE wax. According to the invention, through chemical bond connection between the silane modified PE gel and inorganic particles such as the glass fiber powder and the nano cellulose, and a toughening effect of the acrylate resin, mechanical properties such as tensile strength, bending strength and impact strength of the plate are greatly improved; through use of high-crystallinity nano-crystalline cellulose and modified wood flour, the hydrophobicity of the material is improved, meanwhile, due to the fracture and repair mechanism of boric acid ester bonds, the network structure is compact, water is difficult to permeate into a cross-linked network of PE / wood flour, and thus the water resistance of the board is improved; phosphonic acid and quaternary phosphonium salt ionic liquid in the silane modified PE gel have lasting antibacterial property; and the balance of water permeability and waterproofness is realized through a process of combining cross-linked gel, evaporation hole making and hot press molding.