66 results about "Cuo nanoparticles" patented technology

The invention provides an industrial electrode for synthesizing urea through electro-catalysis C-N coupling and a preparation method and application of the industrial electrode, and belongs to the field of urea synthesizing.The industrial electrode for synthesizing urea through electro-catalysis C-N coupling comprises a conductive substrate and an electro-catalysis material coating the surface of the conductive substrate; the electrocatalytic material comprises a magnesium oxide modified copper oxide catalyst, and MgO nanoparticles and CuO nanoparticles in the magnesium oxide modified copper oxide catalyst are in contact with each other to form a heterostructure. The magnesium oxide modified copper oxide catalyst is used as an electro-catalysis material, MgO nano-particles and CuO nano-particles in the catalyst material are in contact with each other to form a heterostructure, after MgO is introduced, the CO2 adsorption and activation capacity is improved, CO and NHx coupling is promoted, and the urea Faraday efficiency is improved. The industrial electrode shows excellent selectivity and stability in the process of electro-catalytic synthesis of urea.

The present invention discloses a strong, non-toxic, antibacterial and antiviral nano-functional material and a preparation method thereof. The nano-functional material is green, non-toxic and harmless, and its antibacterial and antiviral effect can reach more than 99%. The new nano-material innovatively uses the natural antibacterial agent meta-dichlorostyrene meta-dichloroacetophenone as the main body of the material to exert its antibacterial and antiviral effects. This makes the new nano-material not only have extremely strong antibacterial and antiviral effects, but also as a natural antibacterial agent, when it is used as a textile material, it can be non-toxic and harmless to the human body, green and healthy. It has a better inhibitory effect on both Gram-negative and Gram-positive bacteria than nano-copper oxide and meta-dichlorophenylethanol and meta-dichloroacetophenone. The present invention also provides a preparation method for the nano-functional material, which includes chemical reaction processes such as boron hydrolysis reaction, catalytic oxidation reaction, electrocarboxylation reaction, and esterification reaction.

The invention relates to the field of packaging bags, in particular to a mildewproof and bacteriostatic composite packaging bag and a preparation method thereof, and aims to solve the problem that an existing packaging bag is lack of effective inhibition capability on breeding and reproduction of bacteria and molds. According to the composite packaging bag, the polypropylene resin serves as the main raw material, so that the composite packaging bag has high mechanical performance, the packaging requirements of different products can be met, reliable physical protection is provided for the products, and the products are prevented from being subjected to external physical damage and leakage; the fluorine-containing bis-imidazolium ionic compound and the modified nano-copper oxide are added into the composite packaging bag, growth of various common bacteria and molds can be effectively inhibited and killed under the synergistic effect of the fluorine-containing bis-imidazolium ionic compound and the modified nano-copper oxide, commodities in the packaging bag can be prevented from being damaged by microorganisms, the quality and the use value of the commodities are guaranteed, the shelf life of the commodities is prolonged, and moreover, the product quality is improved. The preparation method has the advantages of simple operation, easy industrial production, low cost and good market application prospect.

The invention discloses a preparation method of a magnesium alloy corrosion-resistant thermal control coating, and relates to the technical field of metal surface treatment. The preparation method comprises the following steps: carrying out numerical control laser texturing treatment on the surface of the magnesium alloy with an oxide film removed; the magnesium alloy subjected to numerical control laser texturing treatment serves as an anode, micro-arc oxidation treatment is conducted, and a micro-arc oxidation coating is formed on the surface of the magnesium alloy so as to improve the corrosion resistance and thermal control performance of the magnesium alloy; wherein the electrolyte additive is nano copper oxide subjected to irradiation modification treatment. According to the method, the magnesium alloy surface is subjected to laser texturing treatment, so that more regular and ordered holes are formed in the magnesium alloy surface, the activity and roughness of the magnesium alloy surface are improved, on one hand, the thermal control performance of the micro-arc oxidation coating is improved, and on the other hand, the microstructure uniformity of the micro-arc oxidation coating is improved; the porosity of the micro-arc oxidation coating is remarkably reduced, and the corrosion resistance of the micro-arc oxidation coating is improved.

The invention discloses a preparation method of a CuO-coated N-C electroreduction CO2 catalyst with a multilayer square structure. The method comprises the following steps: dissolving a Cu (NO3) 2 solid in an N, N-dimethylformamide solvent to obtain a solution A, adding terephthalic acid, polyvinylpyrrolidone K10-14 and dodecanoic acid into a reaction kettle, transferring the solution A into the reaction kettle, and adding absolute ethyl alcohol; and heating the reaction kettle in a drying oven, after the reaction is finished, centrifugally collecting a product, and cleaning and drying to obtain the Cu-BDC precursor with a multi-layer square structure. The Cu-BDC precursor is placed in a muffle furnace to be calcined, and the CuO-coated N-C electroreduction CO2 catalyst of a multi-layer square structure can be obtained. According to the method, nanoscale CuO particles can grow on the surface of the Cu-BDC precursor on the basis of retaining the multi-layer square structure of the Cu-BDC precursor, so that CuO plays a catalytic role as much as possible, and the electro-catalytic property of CuO-N-C is improved.

The present disclosure provides a method for preparing nano copper oxide flakes, and relates to the technical field of metal powder nanomaterial preparation. The method comprises: configuring copper salt into a copper precursor aqueous solution containing a surfactant, and configuring alkali into an alkaline solution; converting the copper precursor aqueous solution containing a surfactant into a copper micro-nano aerosol containing a surfactant, and converting the alkaline solution into an alkali-containing micro-nano aerosol; performing a gas phase confined micro-region mixing pre-reaction on the copper micro-nano aerosol containing a surfactant and the alkali-containing micro-nano aerosol to obtain a copper-alkali mixed solution, and transferring the copper-alkali mixed solution to a polytetrafluoroethylene reactor for hydrothermal reaction to obtain a nanoparticle solution containing a copper compound; performing solid-liquid separation, washing, drying and roasting on the nanoparticle solution containing a copper compound to obtain a nano copper oxide flake. The present disclosure reduces the preparation cost of the nano copper oxide flake on the basis of improving the preparation efficiency of the nano copper oxide flakes.

The invention discloses a marine antifouling and anticorrosive coating with copper ion controllable release and self-repairing functions and a preparation method of the marine antifouling and anticorrosive coating, and belongs to the technical field of marine equipment antifouling and anticorrosive coatings. In order to solve the problems that a traditional copper-based antifouling coating is too fast in initial release of copper ions, poor in antifouling persistence, easy to damage and difficult to give consideration to antifouling and self-repairing performance, the preparation method comprises the following steps: firstly, preparing a KH560 modified nano copper oxide / activated carbon antifouling agent; controllable release of copper ions is achieved through the adsorption effect of activated carbon and interface modification of KH560. Secondly, taking PTMG and TDI as raw materials, and introducing FDME and BMI to construct a self-repairing polyurethane matrix containing reversible covalent bonds and hydrogen bonds; finally, the antifouling agent is introduced into the self-repairing polyurethane matrix according to a specific proportion, and the composite coating is prepared. According to the invention, long-acting controllable release of copper ions and synergistic improvement of self-repairing and corrosion resistance of the coating are realized, and the coating is suitable for long-term protection of marine equipment.

The invention discloses a flue gas wet desulphurization composite nano synergist and a preparation method thereof, the flue gas wet desulphurization composite nano synergist comprises the following components by mass: 60-70 parts of organic acid, 10-20 parts of a nano metal oxide compound, 5-10 parts of a surfactant, 3-8 parts of a pH value regulator, and 3-8 parts of a dispersant; the organic acid is a mixture of adipic acid and glutaric acid; the nano metal oxide compound is a mixture of nano titanium dioxide, nano zinc oxide and nano copper oxide, and the mass ratio of the nano titanium dioxide to the nano zinc oxide to the nano copper oxide is (2-5): (1-4): 1. The problems that in an existing desulfurization process, the desulfurization efficiency is low, the limestone utilization rate is not high, equipment is prone to scaling and corrosion, and desulfurization by-products are poor in quality are solved. The desulfurization synergist can significantly improve the desulfurization efficiency, reduce the operation cost, reduce the damage to equipment, and improve the overall performance and stability of a desulfurization system.

The invention discloses a method for preparing micro-nano copper oxide powder through a microwave method and application of the micro-nano copper oxide powder. The method comprises the following steps: a) preparing a copper ion solution; b) adding a dispersing agent and a surfactant; c) adding urea; d) microwave heating reaction; e) separating and purifying a product; and f) drying and calcining. According to the preparation method, the rapid heating characteristic of microwave radiation is utilized, the effect of urea is combined, dispersing agents such as polyvinylpyrrolidone (PVP) and the like and surface active agents are added into a solution containing copper ions, the copper oxide nano-particles with the particle size distribution being 50-100 nanometers and even being controllable to be in the micron order are prepared, and the copper oxide nano-particles have good crystal structures and dispersity; the method is simple in process, high in reaction speed and low in energy consumption, and the obtained copper oxide nano particles can be used for preparing high-performance and high-purity copper oxide nano materials and have wide application prospects.

The invention relates to the technical field of photocatalysis, in particular to an I-type p-n heterojunction photocatalyst as well as a preparation method and application thereof. According to the photocatalyst, an n-type semiconductor metal organic framework NUS-8 is used as a matrix, a p-type semiconductor CuO is loaded, and an I-type p-n heterojunction structure is constructed. The preparation method comprises the following steps: by taking NUS-8 and cupric salt as raw materials and N, N-dimethylformamide as a dispersion medium, performing coordination anchoring on Cu < 2 + > on the surface of NUS-8 under solvothermal, oxidizing to form CuO nanoparticles, and constructing a coupling interface to obtain the photocatalyst. An energy band of the material is in I-type (straddling type) arrangement, a built-in electric field is formed by Fermi level difference at an interface, directional separation and migration of photo-induced electrons and holes are effectively driven, and the catalytic activity and stability of a photocatalytic reaction are remarkably improved. The material has the advantages of simple and convenient process, stable structure, excellent photocatalytic performance and the like, and is suitable for environment and energy related fields such as photocatalytic CO2 reduction and the like.

The invention discloses a preparation method of tungsten-coated tungsten / copper powder for tungsten-copper slurry, which comprises the following steps: ensuring that copper is uniformly distributed on the surface of tungsten powder by utilizing the charge adsorption effect of nano copper oxide and the tungsten powder, then reducing the nano copper oxide under a hydrogen condition, and improving the binding force of copper and tungsten by utilizing the energy change of a reduction reaction. Then a functional phase material of a tungsten-tungsten / copper structure is prepared through PVD tungsten layer plating, the binding force of tungsten copper and a tungsten layer is improved through heat treatment, segregation of a copper phase in the high-temperature co-firing process is prevented through the tungsten layer with the compact surface, meanwhile, the layering and cracking phenomena of the material after slurry high-temperature sintering can be reduced through configuration of tungsten powder with different granularities, and the material density is improved; and the square resistance is effectively reduced.

In the patent, an inorganic metal nano material CuO is used as a sacrificial template to prepare the high-flux hollow fiber ultrafiltration membrane, and the prepared membrane has high interception performance, can maintain stable improvement of permeation flux and can be used for rapid ultrafiltration. Results show that the pure water flux of the CuO membrane is increased from 88 Lm <-2 > h <-1 > to 130 Lm <-2 > h <-1 >, compared with a membrane added with CuO nanoparticles with the same mass, the flux is increased by about 1.5 times, and the filter flux of BSA is increased from 29.7 Lm <-2 > h <-1 > to 35.5 Lm <-2 > h <-1 >. Meanwhile, the rejection rate of BSA (Bovine Serum Albumin) is 93%. In the future, the method for preparing the high-flux ultrafiltration membrane by using the inorganic metal nano material as the sacrificial template can be applied to manufacturing of other separation membranes in different industries, and meanwhile, a route is provided for flexible design and convenient manufacturing of the high-permeability hollow fiber ultrafiltration membrane in industrial ultrafiltration.

The application discloses a kind of step-by-step doping preparation ultra-thin BME ceramic dielectric capacitor and preparation method, and the ultra-thin BME ceramic dielectric capacitor is by dielectric layer and dielectric layer mutual superposition and is fired, the dielectric layer includes dielectric layer and electrode printed on dielectric layer, the dielectric layer includes the following raw materials: coated BSCT main matrix, liquid flux agent;Coated BSCT main matrix includes the following raw materials: BSCT material, magnesium nitrate, manganese acetate, oxovanadium oxalate, rare earth nitrate;Liquid flux agent is by nano copper oxide, tetraethyl orthosilicate, tributyl borate in proportion, targeted doping is carried out by step-by-step doping, and new three-layer structure is formed to obtain good comprehensive performance.

The invention discloses a modified lacquer film-forming material based on nanometer copper oxide particles and a preparation method and application thereof, and belongs to the technical field of high polymer materials, the modified lacquer film-forming material comprises the nanometer copper oxide particles, a natural lacquer matrix, a dispersing agent and a flexibilizer, the preparation method comprises the following steps: step a, preparing a film-forming agent; adding nano copper oxide particles into an organic solution of a silane coupling agent, carrying out ultrasonic dispersion, and then carrying out centrifugal drying to obtain modified nano copper oxide particles; step b, mechanically stirring the modified nano copper oxide particles and a natural lacquer matrix under the protection of nitrogen, and synchronously adding a dispersing agent and a toughening agent to obtain a composite system; and step c, spraying or brushing the composite system onto the surface of a base material, and curing in an environment to form a film, so as to obtain the modified lacquer film-forming material. The method has the advantages of high catalytic efficiency and high environmental compatibility, and the film-forming property of the lacquer can be remarkably improved.

The invention belongs to the technical field of electro-catalysis, and particularly discloses a Cu nanoparticle / acidified carbon nanotube catalyst and a preparation method and application thereof.According to the preparation method, acidified pretreated carbon nanotubes with good conductivity and high specific surface area are selected as a substrate, CuO nanoparticles are evenly loaded through a hydrothermal method, and the Cu nanoparticle / acidified carbon nanotube catalyst is obtained; and growing a zeolite imidazate framework material-8 (ZIF-8) on the surface of the CuO nanoparticle-loaded carbon nanotube in situ, and regulating the thickness of an ultrathin nitrogen-carbon layer on the surface and coordination of Cu-N by regulating the calcining temperature and time. According to the Cu nanoparticle / acidified carbon nanotube catalyst as well as the preparation method and the application thereof, the Cu nanoparticles are encapsulated in a confined manner, so that long-service-life electrically-driven CO2 is converted into a high-added-value C2 + product, catalytic active sites of the Cu nanoparticles are fully exposed, the charge transfer rate is increased, and the intrinsic activity of the Cu active sites is improved.

The present invention provides a chip-type hemispherical copper oxide microelectrode, a preparation method and an application thereof. The copper oxide microelectrode comprises nano-copper and nano-copper oxide that are in-situ grown and stacked on a conductive substrate to form a semi-microsphere, wherein the surface layer of the semi-microsphere is formed by stacking the nano-copper oxide. The chip-type hemispherical copper oxide microelectrode, the preparation method and the application thereof provided by the present invention have a rough interface structure and exposed stereoscopic crystal planes at the same time. Therefore, the constructed microelectrode has good stability and reproducibility. When it is applied to a sensor for detecting glucose, excellent sensitivity, anti-interference property and stability can be obtained. At the same time, the semi-microspheres of the microelectrode are not easy to fall off, and the performance difference between the microelectrodes is small, making it possible to mass-produce enzyme-free glucose sensors in large quantities.

The present invention discloses a laser-written high-temperature resistant nano copper and its preparation method and application. The precursor solution is obtained by heating and stirring an alcohol solvent, an organic dispersant, an organic auxiliary agent, and a formate; nano copper oxide is added to the precursor solution and ultrasonically dispersed to obtain nano copper oxide ink; the nano copper oxide film is coated on a pretreated substrate and then subjected to laser direct writing induced passivation / photothermal reduction sintering. The high-temperature resistant nano copper has good oxidation resistance and thermal stability and excellent conductivity. The present invention is simple to prepare, wherein the nano copper oxide ink can be stored for a long time and is not affected by oxidation, and is suitable for a variety of manufacturing processes such as printing, coating, and printing. Moreover, based on laser direct writing, the processing efficiency is high, and the multi-performance integration of high-temperature resistant nano copper can be achieved in one step. The high-temperature resistant nano copper in the present invention can be used as an interconnect circuit in a full laser in-situ direct writing integrated sensor system, and can be widely used in aerospace, automobile, electronics and other fields.

The application discloses a preparation method of an electric contact material and an electric contact, and the preparation method comprises the following steps: adding a graphene oxide dispersion solution into a target dispersion solution to uniformly disperse, so as to obtain a graphene composite material; the target dispersion solution comprises nano copper oxide powder, nano lanthanum oxide powder and a surfactant; the graphene composite material is subjected to removal and reduction treatment, so as to remove the surfactant in the graphene composite material, and a reduced metal composite material is obtained; the metal composite material comprises graphene, copper, copper oxide and lanthanum oxide; the metal composite material is subjected to ball milling treatment, so as to obtain an electric contact composite material containing lanthanum oxide and graphene. According to the embodiment of the application, the lanthanum oxide and the graphene can be uniformly dispersed, so that the electric conductivity and the anti-welding performance of the electric contact material are effectively improved.

The present invention belongs to the field of catalysts, and specifically relates to a recyclable peroxidase mimetic enzyme, its preparation method, and application. The peroxidase mimetic enzyme comprises PVA aerogel and CuO nanoparticles, wherein the CuO nanoparticles are loaded on the surface of the PVA aerogel. The preparation method comprises sequentially immersing the PVA aerogel in a copper salt solution and an alkaline solution, washing, and drying the aerogel to obtain the peroxidase mimetic enzyme. The peroxidase mimetic enzyme prepared by the present invention not only has excellent catalytic performance, but is also easy to recycle and separate after the catalytic reaction, can be reused, and still maintains good catalytic performance after repeated recycling ten times. Moreover, when the peroxidase mimetic enzyme is removed during the catalytic reaction, the reaction rate is significantly reduced, achieving the effect that the reaction can be controlled at any time. In addition, the peroxidase mimetic enzyme can achieve highly sensitive and instant detection of hydroquinone / catechol, has a simple operation process, does not require specialized instruments and professionals, greatly improves detection speed, and reduces labor costs.

The invention discloses a copper-graphite-nanometer copper oxide three-dimensional interface electrical contact material and a preparation method and application thereof, and belongs to the technical field of electrical contact materials.The copper-graphite-nanometer copper oxide three-dimensional interface electrical contact material is prepared from, by mass, 50-60% of small-size spherical copper powder, 0.5-1% of microcrystalline graphite, 0.5-1% of nanometer copper oxide, 0.5-1% of nanometer copper oxide and the balance copper oxide. According to the carbon content, the copper / nanometer copper oxide / graphite composite powder accounts for 5%-6%, the trace alloy elements account for 2%-3%, the balance is the large-size spherical copper powder, D50 of the small-size spherical copper powder is smaller than 1 micrometer, and D50 of the large-size spherical copper powder is 1-30 micrometers. According to the invention, by elaborately designing the spatial distribution and interface state of copper, graphite and nano copper oxide in the microscopic scale, collaborative optimization of conductivity, mechanical strength and arc performance is realized, and the high-performance, low-cost and environment-friendly electrical contact material is obtained.

The invention relates to the technical field of building materials, and discloses an anti-crack high-performance concrete and a preparation method thereof, the anti-crack high-performance concrete comprises an energy synergistic long-acting micro-expanding agent formed by light calcined magnesia modified by a nano copper oxide catalyst; the multi-signal response type self-repairing agent is composed of anhydrous metastable state aluminosilicate glass body powder and slow release type fluoride salt particles. The preparation method comprises the following steps: mechanically co-grinding the two functional components and a part of the cementing material to obtain a functional master batch, and mixing the functional master batch with the remaining materials. Through the synergistic effect of the functional components and the unique preparation process, the drying shrinkage of the concrete is effectively inhibited, and the mechanical property is improved. When cracks are generated, the self-repairing system can be triggered by signals such as moisture to react with the micro-expansive agent in a synergistic manner, and a compact product is generated to effectively block the cracks, so that the durability and reliability of the concrete are remarkably improved, and the technical problem of cracking of concrete materials is solved.

The invention discloses a kind of CuO nanoparticle-loaded titanium silicon molecular sieve CuO / TS-1 composite photocatalyst and its application, the Cu of load is carried on the lattice and surface of TS-1 in the form of CuO, is made by following preparation method: a certain amount of CuSO4 is dissolved in 10ml deionized water and stirred, and a certain amount of ammonia solution (1:1) is added until precipitation is completely dissolved to obtain copper ammonia complex; TS-1 powder is dissolved in deionized water, stirred, ultrasonicated, and uniformly distributed; Then copper ammonia complex is added dropwise to TS-1, stirred, CTAB is added and stirred, and hydrothermal reaction, washing, drying, grinding are carried out to obtain. Composite catalyst of the present invention can be excited by visible light, utilizes the synergy of the adsorption of TS-1 and the photocatalytic action of the composite and the photo-Fenton action of copper dopant, and achieves the purpose of efficiently degrading tetracycline antibiotic wastewater.

A method of producing hydrogen gas that includes contacting a catalytic MnO2 / MgO / CuO / g-C3N4 nanocomposite with a solution including water and a borohydride source. The catalytic MnO2 / MgO / CuO / g-C3N4 nanocomposite includes 5 to 15 wt. % MgO nanoparticles, 5 to 15 wt. % MnO2 nanoparticles, 15 to 25 wt. % CuO nanoparticles, and 55 to 65 wt. % g-C3N4 nanosheets. The MgO nanoparticles, MnO2 nanoparticles, and CuO nanoparticles are disposed on the g-C3N4 nanosheets.

The present disclosure provides a method for preparing spindle-shaped nano-copper oxide, which relates to the technical field of the preparation of powder nano-materials. The method includes: under the action of magnetic stirring, configuring a copper salt into an aqueous solution of a copper precursor and configuring an alkali into an alkaline mixed solution; using a high-frequency ultrasonic dispersion device to convert the aqueous solution of the copper precursor into a copper-containing micro-nano aerosol and converting the alkaline mixed solution into a micro-nano aerosol containing a mixed alkali; performing gas-phase confined micro-region mixing on the copper-containing micro-nano aerosol and the micro-nano aerosol containing the mixed alkali to obtain a copper-alkali mixed solution, and transferring the copper-alkali mixed solution to a polytetrafluoroethylene reaction kettle for hydrothermal reaction to obtain a nano-particle solution containing a copper compound; performing solid-liquid separation, washing, drying, and calcination on the nano-particle solution containing the copper compound to obtain spindle-shaped nano-copper oxide powder. The present disclosure solves the problem that it is impossible to use a mixed alkali as a morphology control agent to synthesize spindle-shaped CuO nanocrystals.

The invention discloses a polyamide composite material which comprises the following components in parts by weight: 50-100 parts of polyamide resin; 15 to 30 parts of brominated polystyrene; 6 to 13 parts of a flame retardant synergist; 35 to 55 parts of glass fiber; 0.5 to 4 parts of nano copper oxide; and 0.5 to 2 parts of nano zinc oxide. According to the invention, a bromine-antimony flame-retardant polyamide material system is selected, nano copper oxide and nano zinc oxide are added, are dispersed in a material matrix during melt blending modification, can be combined with a polyamide end group, and can absorb and neutralize free acid brought by a flame retardant; meanwhile, nanoscale zinc oxide and nanometer copper oxide form a complexing effect under the double-screw shearing effect, the wear resistance of the material can be remarkably improved, the synergistic flame retardant effect is achieved, the effect of stabilizing a material system is achieved, the metal corrosion resistance of the material is effectively improved, and the service life of the material is prolonged. Therefore, the flame-retardant modified polyamide composite material with both high wear resistance and metal corrosion resistance is realized.

This invention discloses a plastic film production device and process based on nano-copper oxide antiviral masterbatch, belonging to the field of plastic film production technology. It includes a base with a feeding component on its top. The feeding component, along with a crushing component inside the feeding box, allows for secondary crushing of raw material particles, improving subsequent mixing. The purpose of this invention is to provide a plastic film production device and process based on nano-copper oxide antiviral masterbatch to address the problem that existing plastic films lack antibacterial and antioxidant functions. The product produced by this invention incorporates nano-copper oxide antiviral masterbatch during production, enabling the plastic film to kill bacteria and viruses. This avoids cross-infection of bacteria and viruses (such as COVID-19) caused by traditional plastic film products (such as packaging films and logistics bags) in daily life.

The invention discloses a polyamide composite material as well as a preparation method and application thereof. The polyamide composite material comprises the following components in parts by weight: 75-92 parts of polyamide resin; 15 to 30 parts of brominated polystyrene; 8 to 16 parts of a phosphorus-based flame retardant; 0.2 to 2.0 parts of nano copper oxide; 0.2 to 2.0 parts of inorganic blue toner; and 0.2 to 2.0 parts of inorganic red toner. In a brominated flame-retardant polyamide material system, a phosphorus-based flame retardant is introduced as a flame-retardant synergist, and nano copper oxide is matched with the inorganic blue toner and the inorganic red toner to obtain a black product, so that carbon black powder is effectively replaced, the CTI value of the material is improved while high glow wire performance is obtained, and the flame-retardant polyamide material is suitable for industrial production. The solvent resistance of the system is improved, and the black polyamide composite material with high glowing filament, high CTI value and excellent solvent resistance is realized.

This invention discloses a high-strength, environmentally friendly, antibacterial particleboard and its preparation method, belonging to the field of novel functional artificial board technology. The particleboard utilizes a coordination reaction between 4-vinylbenzoic acid and rare earth lanthanum to construct a rare earth coordinated organic shell layer in situ on the surface of nano-copper oxide. Then, using a mercapto-ene click chemistry reaction, the vinyl-containing core-shell nano-copper oxide is covalently bonded and fixed onto mercapto-modified montmorillonite sheets. Stable liquid antibacterial agents are prepared by reacting these agents with sodium silicate solution and polyethylene glycol solution, respectively, and added to the core and surface particleboard. This not only achieves synergistic antibacterial and anti-leaching effects but also utilizes the alkalinity of sodium silicate to accelerate the curing of diphenylmethane diisocyanate in the core layer, achieving simultaneous curing of the core and surface layers of the board, thus improving the board's performance and environmental friendliness.

An electroconductive material includes CuO nanoparticles that, when fired, becomes metallic copper defining an electroconductive component, a glass raw material mixture that becomes glass when fired, and a solvent that dissolves or disperses the CuO nanoparticles and the glass raw material mixture. The glass raw material mixture includes a metal salt configured as powder with a particle diameter of about 100 nm or less or as ions. The electroconductive material is applied to the surface of the ceramic body and then fired at a temperature higher than or equal to the melting point of the glass raw material mixture to form the outer electrodes.

The invention belongs to the technical field of pathogenic bacteria detection, discloses a rapid and visual pathogenic bacteria detection method and a portable detection device, and particularly discloses a sensor for detecting pathogenic bacteria, and the sensor is a1) or a2); (a1) comprises bfDNA-metal nano particles, S1-CuO and S2-CuO; (a1, a2) comprises ssDNA-metal nanoparticles, S1-CuO and S2-CuO. According to the preparation method, bifunctional nucleic acid is modified on the surface of metal nanoparticles to obtain bfDNA-metal nanoparticles, S1-CuO and S2-CuO are sequentially connected with the bfDNA-metal nanoparticles through complementary base pairing, S1-CuO and S2-CuO can be sequentially connected through loop chain hybridization to form a polymer with a plurality of CuO nanoparticles, and a sensor for detecting pathogenic bacteria is obtained. The method can be used for effectively detecting pathogenic bacteria and can also be used for detecting the sensitivity of antibacterial drugs.