420results about How to "Reduce reunion" patented technology

The invention relates to the technical field of epoxy resin paint, and discloses waterborne epoxy paint suitable for containers and a preparation method of the waterborne epoxy paint. A component A of the waterborne epoxy paint comprises, by weight, 100 parts of waterborne epoxy resin and 0.5-0.8 part of a flash rust inhibitor; the component B comprises 6-8 parts by weight of a polyamide curing agent, 5-12 parts by weight of an organosilicon sulfonate polyurethane toughening agent and 0.2-1 part by weight of graphene oxide; the organic silicon polyurethane flexibilizer can play a role of a dispersing agent, the dispersity of graphene in the waterborne epoxy paint is improved, the main chain of the organic silicon polyurethane flexibilizer contains imino groups, the organic silicon polyurethane flexibilizer can be subjected to a curing reaction with epoxy resin, a flexible organic polysiloxane molecular chain is bonded into an epoxy resin molecular chain, and the flexibility of the waterborne epoxy paint is improved. A good toughening effect is achieved, so that the flexibility, the impact resistance and the corrosion resistance of a paint film are improved.

The invention relates to structural health monitoring intelligent concrete for airports and a preparation method thereof, and the method comprises the following steps: adding a polycarboxylic acid water reducing agent into water, and mixing to obtain a water reducing agent solution; adding carboxylated multi-walled carbon nanotubes, silica fume and fly ash into the water reducing agent solution, and mixing to obtain a carbon nanotube suspension; performing ultrasonic treatment on the carbon nanotube suspension to obtain a carbon nanotube dispersion liquid; and adding the carbon nanotube dispersion liquid into the dry material mixture, and mixing to obtain the structural health monitoring intelligent concrete for the airport. Compared with the prior art, the conductivity of the concrete can be effectively improved, so that the concrete has the function of monitoring structural health.

The invention relates to the technical field of coating preparation, and particularly discloses a multifunctional composite filler modified water-based coating and a preparation method thereof.The water-based coating is prepared from, by weight, 80-100 parts of modified core-shell acrylic acid dispersoid, 5-7 parts of multifunctional composite filler, 0.5-1 part of defoaming agent, 0.5-1 part of wetting agent, 2-5 parts of thickening agent, 1-2 parts of coalescing agent and 25-35 parts of deionized water. The water-based paint provided by the invention is modified by adding a proper amount of multifunctional composite filler, the performance is excellent, the stability is good, the components in the water-based paint have good compatibility by optimizing the preparation process conditions of the water-based paint, and the preparation method is simple to operate and suitable for industrial production.

The invention discloses a carbon ceramic composite conductive microsphere, a ceramic resistor and a preparation method, and belongs to the technical field of production of special materials of electrical equipment, and the method comprises the following steps: sequentially dipping porous mullite in a precursor solution of carbon and slurry containing carbon black, and carrying out drying treatment and carbon burying sintering to obtain the carbon ceramic composite conductive microsphere; the preparation method comprises the following steps: preparing a ceramic raw material, performing vacuum-assisted centrifugal impregnation on the ceramic raw material and slurry consisting of a binder in pug consisting of the ceramic raw material and a surfactant, sequentially performing drying and glue discharging treatment, primary isostatic pressing forming and air pressure sintering, cooling to room temperature, and performing mechanical treatment and electrode spraying to obtain the ceramic resistor. Impregnation improves the dispersibility and uniformity of the carbon material in the porous mullite to form a continuous conductive path, the carbon black-containing slurry improves the conductivity of the ceramic resistor, carbon-buried sintering generates in-situ carbon with abundant types, the combination of carbon and a ceramic interface is promoted, and the oxidation resistance, mechanical properties and electrical properties of the ceramic resistor are improved.

The invention relates to the technical field of titanium dioxide, and discloses a preparation method of high-dispersity nano titanium dioxide and application of the high-dispersity nano titanium dioxide in paints.The nano titanium dioxide is modified through KH560, epoxy groups are introduced to the surface of the nano titanium dioxide, then the nano titanium dioxide and active imino groups of DOPO carboxyl phenolic resin are subjected to a ring-opening reaction, and the high-dispersity nano titanium dioxide is obtained. The hydrophilic carboxyl-containing phenolic resin is introduced to the surface of the nano titanium dioxide, so that the hydrophilicity of the nano titanium dioxide is remarkably improved, the dispersity of the nano titanium dioxide in water is improved, the nano titanium dioxide has good compatibility with acrylic resin, and the hardness and tensile property of the acrylic resin are improved. The phenolic resin grafted on the surface of the nano titanium dioxide has very high char forming property, contains DOPO flame-retardant groups, and can play a very good condensed phase flame-retardant role, so that the water-based paint has a very good flame-retardant effect.

The invention relates to the field of polystyrene auxiliaries, and particularly discloses a coating agent for expandable polystyrene as well as a preparation method and application of the coating agent. The coating agent for expandable polystyrene is prepared from the following raw materials in parts by weight: 28 to 42 parts of mono / diglycerol fatty acid ester, 32 to 42 parts of triglyceride, 22 to 32 parts of stearate, 1 to 5 parts of ethylene bis stearamide and 2 to 3 parts of polyvinyl alcohol, and the granularity of the raw materials is 300 to 325 meshes. The coating agent provided by the invention can be used for light-grade, flame-retardant and common-grade expandable polystyrene, and can reduce adhesion and agglomeration among expandable polystyrene particles, enhance the demolding effect and reduce volatilization and loss of a foaming agent and an auxiliary agent.

The invention discloses a system and a method for preparing synthesis gas through methane self-heat-supply thermocatalysis coupled photothermal catalysis cascade reforming, and the method comprises the following steps: methane and oxygen are combusted in a combustion furnace, the generated high-temperature gas enters a first reactor after heat exchange, the temperature in the first reactor is maintained at 700-800 DEG C, the molar ratio of CH4 to CO2 is 1: (0.8-1.2), the temperature in the first reactor is maintained at 700-800 DEG C, and the temperature in the second reactor is maintained at 700-800 DEG C; carrying out a thermocatalytic dry reforming reaction; after the gas reacted in the first reactor is subjected to heat exchange through a second heat exchanger, the gas enters a second reactor, the temperature in the second reactor is maintained at 500-600 DEG C, the molar ratio of CH4 to CO2 is 1: (0.8-1.2), and a photo-thermal catalytic dry reforming reaction is carried out; high-temperature gas obtained after reaction in the second reactor enters a third heat exchanger for heat exchange and then enters a third reactor, the temperature in the third reactor is kept at 300-400 DEG C, the molar ratio of CH4 to H2O is 1: (0.8-1.2), and a second-stage photo-thermal catalytic reaction is carried out.

The invention belongs to the technical field of material preparation, and aims to solve the problem that the comprehensive performance of a material is affected by non-uniform microstructure of the material due to the fact that the distribution and grain size of each phase in a metal ceramic matrix are difficult to accurately control in the conventional preparation process of the metal ceramic material. Therefore, the invention provides the preparation method of the fiber-reinforced metal ceramic material, and the preparation method comprises the following steps: pretreating silicon carbide fibers; mixing and grinding the titanium metal powder and the silicon carbide ceramic powder according to a preset proportion; adding silicon carbide fiber particles and putting the mixture into an ultrasonic mixer; adding a dispersing agent and a binding agent and mixing again; sequentially carrying out cold isostatic pressing molding and hot pressing molding on the mixture; and sequentially carrying out pre-sintering, high-temperature sintering, cutting and surface treatment on the obtained green body. The strength, toughness, hardness, high temperature resistance, wear resistance and corrosion resistance of the prepared metal ceramic material are remarkably improved, the high-performance requirement of the aviation field can be better met, and powerful support is provided for the aviation industry.

The invention discloses a silicon-tin-carbon composite material as well as a preparation method and application thereof, and the silicon-tin-carbon composite material sequentially comprises a porous silicon core, a first coating layer and a second coating layer from inside to outside, the first coating layer comprises a porous carbon material and tin located in pores of the porous carbon material, and the second coating layer comprises an amorphous carbon coating layer; pores of the porous silicon core contain tin and a porous carbon material. Tin of the silicon-tin-carbon composite material is located in pores of the porous carbon layer, so that the problem of tin expansion and the problem of tin agglomeration in the subsequent high-temperature carbonization process are buffered; meanwhile, a porous composite layer formed by tin and a porous carbon material is compounded to the surface and pores of the porous silicon core, so that the surface defects of porous silicon are repaired, and the expansion of silicon is limited to a certain extent; and on one hand, the outermost coated carbon layer can inhibit the volume expansion of silicon and tin in the charging and discharging process and increase the conductivity of the composite material.

The invention relates to the technical field of coatings, and provides a nano anti-corrosion waterproof coating capable of resisting high and low temperatures and acid and alkali, which is prepared from the following raw materials in parts by mass: 30 to 40 parts of pure acrylic emulsion, 10 to 20 parts of modified nano silicon dioxide, 2 to 4 parts of nano titanium dioxide, 3 to 6 parts of nano zinc oxide, 2 to 4.4 parts of auxiliaries and 5 to 9 parts of water, the modifier comprises dibasic ester and / or dihydric alcohol. According to the technical scheme, the problem that the performance of the nano coating is low due to the fact that the nano particles are easy to agglomerate and are not uniformly dispersed in the base material in the prior art is solved.

The invention provides a PtRu-based composite bifunctional catalyst and a preparation method and application thereof, the PtRu-based composite bifunctional catalyst comprises a carrier and a load loaded on the carrier, and the carrier comprises a graphitized carbon carrier; the load comprises platinum ruthenium-based metal particles and a compound with a chemical formula of HxMO3, wherein M comprises W or / and Mo. According to the PtRu-based composite bifunctional catalyst disclosed by the invention, the metal PtRu plays a role in resisting CO poisoning, and the HxMO3 plays a role of a proton acceptor, so that a hydrogen oxidation reaction is promoted. Meanwhile, the HxMO3 can strengthen a difunctional mechanism of a carbon monoxide oxidation reaction, and the CO poisoning resistance of the catalyst is improved. In addition, the graphitized carbon carrier with a specific graphite microcrystal size has good high-potential corrosion resistance and metal dispersibility, and metal agglomeration and performance degradation of the catalyst caused by high-potential corrosion of the carrier are greatly slowed down.

The invention discloses a high-stability silicon monoxide lithium ion battery negative electrode material and a preparation method thereof. The preparation method comprises the following steps: carrying out hydrothermal reaction on modified silicon monoxide micro powder and chromium nitrate nonahydrate to obtain MOF / silicon monoxide composite powder, and mixing the MOF / silicon monoxide composite powder with carbon nanotubes to obtain powder to be carbonized; and carbonizing the powder to be carbonized in a tubular furnace, and fluorinating with fluorine gas to obtain the high-stability silicon monoxide lithium ion battery negative electrode material. According to the preparation method, Cr-MOF coating is generated on the surface of the silicon monoxide powder in situ, agglomeration of the silicon monoxide powder is reduced, carbon nanotubes are evenly attached to Cr-MOF and then heated and carbonized, the carbon nanotubes are cured by a carbonization layer formed at a high temperature, the combination degree of the carbon nanotubes, a carbon layer and silicon monoxide is high, and the silicon monoxide powder is prepared. And under the synergistic effect with carbon fluoride formed by fluorination of fluorine, the stability of the silicon monoxide lithium battery negative electrode material is improved, the expansion rate of silicon monoxide is reduced, and the cycling stability of a lithium ion battery is improved.

The invention discloses a bimetallic MOFs mediated morphology-controllable catalyst, a preparation method and application thereof, and the preparation method comprises the following steps: respectively adding an iron salt, a cobalt salt and an organic ligand into an organic solvent, and then adding an alkaline regulator and a surfactant; transferring the stirred solution into a reaction kettle to carry out solvothermal reaction, and centrifuging, washing and drying the suspension after the reaction to obtain a bimetal organic framework (MOFs) precursor; and carrying out heat treatment in a gas atmosphere to obtain the catalyst. The bimetallic MOFs are obtained through a one-step solvothermal method, the size and morphology of the product are regulated through the alkaline regulator, agglomeration of catalyst nanoparticles can be reduced by adding the surfactant, the preparation method is simple, the specific surface area of the product is high, and when the catalyst is used for preparing high-carbon hydrocarbon through catalytic hydrogenation of carbon dioxide, the yield of the product is high. The conversion rate of carbon dioxide reaches up to 47.82%, the selectivity of high-carbon hydrocarbon reaches 59.68%, the selectivity of by-products carbon monoxide and methane is low, and the catalytic activity is good.

The invention relates to the technical field of emulsion preparation, and discloses a metal-polyphenol network graphene oxide Janus nanosheet as well as a preparation method and application thereof, GO JNSs is taken as a solid emulsifier to encapsulate EOs, the problems that EOs are easy to volatilize and poor in water solubility at normal temperature can be solved, and the metal-polyphenol network graphene oxide Janus nanosheet and auxiliaries in a system can achieve a synergistic effect to resist bacteria. The Pickering emulsion containing GO JNSs has good emulsion stability, has excellent hydrophilicity and adhesion performance of polyphenol, can significantly enhance the wetting and spreading effects of emulsion droplets on leaf surfaces, and inhibits rebounding and splashing of the liquid droplets. The preparation process of the GO JNSs and the JNSs-EU-PE is simple, the process is environment-friendly, and the GO JNSs and the JNSs-EU-PE have industrial production prospects.

The invention belongs to the field of advanced structure ceramic preparation, and particularly relates to a load-bearing type high-temperature bedplate and a manufacturing method thereof. The preparation method of the load-bearing type high-temperature bedplate comprises the following steps: (1) sequentially paving the outer layer material, the inner layer material and the outer layer material into a mold, and carrying out high-pressure forming to obtain a formed blank; (2) drying the formed blank to obtain a dry blank; and (3) firing the dry blank at the temperature of 1550-1680 DEG C to obtain the bedplate. The preparation method comprises the following steps: by taking low-zirconium corundum, white corundum, fused mullite and andalusite as raw materials, introducing zirconite and tabular corundum fine powder, and respectively preparing an outer layer material and an inner layer material; the high-strength wear-resistant bedplate with a low-zirconia corundum outer layer and a staggered structure in which zirconia corundum crystals are filled in gaps of a mullite network is formed through pressure forming and sintering, has good high-temperature strength and excellent thermal shock resistance, can bear constantly changing impact of high-low temperature circulation of a pushed slab kiln, and has long service life.

The invention discloses a distillation purification method for preparing a silane coupling agent, and belongs to the technical field of preparation of silane coupling agents. The distillation and purification method for preparing the silane coupling agent comprises the following steps: step 1, mixing a silane coupling agent crude product, tetrahydrofuran, an organic antioxidant and an auxiliary agent, heating, mixing and stirring to obtain a mixture; 2, adding the mixture into a distillation tower, heating and distilling, controlling the heating temperature and the distillation rate, and ensuring stable and continuous evaporation and condensation of the silane coupling agent; and 3, collecting the condensed liquid into a collector, separating the liquid, filtering, and drying to obtain the silane coupling agent. According to the method, the product purity and yield of the silane coupling agent can be effectively improved.

The invention discloses a printed circuit board and a preparation method thereof, and the method comprises the steps: obtaining a to-be-processed plate; the to-be-machined plate is subjected to first drilling treatment, so that a plurality of first target holes are formed in the to-be-machined plate in sequence; carrying out second drilling treatment on the to-be-processed plate to sequentially prepare a plurality of second target holes in the to-be-processed plate so as to prepare a printed circuit board; wherein the plurality of first target holes and the plurality of second target holes are alternately arranged in sequence one by one. By means of the mode, the problem that heat cannot be dissipated in time due to the fact that the interval time is too short in the same area can be effectively solved, heat agglomeration in the preparation process is further reduced, the layering situation caused by heating of the conductive layer and the dielectric layer is reduced, and the structural stability and reliability of the printed circuit board are improved.

The invention relates to the technical field of card protection films, and discloses an anti-ultraviolet card protection film and a preparation process. Nano titanium dioxide is used as an ultraviolet shielding agent to effectively reflect and absorb ultraviolet rays. The isocyanate group on the surface of TDI-modified silicon dioxide can produce a chemical bonding effect with a hydroxyl group of a hydroxyl-containing copolyester, and the bonding force is relatively strong, thereby improving the interface compatibility between the nano titanium dioxide and a substrate, and the ultraviolet transmittance is relatively low, so that ultraviolet light in the medium-wave region and the long-wave region can be better absorbed. The modified polyethylene terephthalate contains units similar to the structure of the card protection film substrate, thereby improving the dispersibility of the nano titanium dioxide in the substrate and weakening the damage of ultraviolet light to polyethylene terephthalate molecules. At the same time, the molecular chain contains a biphenyl aromatic structure, which increases the rigidity of the molecular chain, helps to improve the heat resistance of the polyester, and further prolongs the service life of the card protection film.

The invention discloses a barium titanate coated Ni particle material synthesized under the assistance of a spray drying technology and a method thereof, and belongs to the technical field of metal powder material preparation. The method comprises the following steps: firstly, taking metatitanic acid and barium hydroxide as raw materials, and mixing the metatitanic acid and the barium hydroxide with nano and submicron Ni powder to prepare a mixed solution; secondly, synthesizing a Ni-based composite material intermediate by adopting a spray drying method; and finally, sintering in a tubular furnace to form the barium titanate coated Ni powder. The barium titanate coated Ni inner electrode material is Ni coated BaTiO3 spherical particles with a core-shell structure, the particles are of a core / shell microstructure, a shell layer is a barium titanate coating layer with the thickness of 10-15 nm, and the particle size of the particles is 100-150 nm. According to the method, required equipment can be scaled, components and microstructures are easy to regulate and control, and the method has high sphericity and dispersity, high compactness and good repeatability; the particle size and distribution can be changed by adjusting process parameters; meanwhile, good interface bonding with a ceramic dielectric layer is realized, and the key problems of mismatching of interlayer interface volume shrinkage, easy cracking and the like in the sintering process are relieved.

The invention relates to a high-temperature-resistant high-toughness epoxy adhesive film and a preparation method thereof, and belongs to the technical field of epoxy adhesive films. The high-temperature resistance and mechanical strength of the filler are remarkably improved by calcining a mixture of magnesium phosphate, glucose and montmorillonite at a high temperature, filler agglomeration is reduced by a carbonaceous film formed by carbonizing glucose, and the dispersity and compatibility are improved; after the carbon fibers are pretreated by nitric acid, the interface bonding force between the carbon fibers and the resin matrix and the calcined montmorillonite is enhanced, and the overall toughness of the composite filler is improved; and the composite filler forms a skeleton structure in a resin matrix, so that the toughness and high temperature resistance of the epoxy adhesive film are effectively improved. Besides, the polyamic acid is added into the epoxy resin, and the high temperature resistance and toughness of the epoxy resin are further improved through the formation of a semi-interpenetrating network structure or chemical bond action by utilizing the characteristic that a polyamic acid molecular chain segment can maintain relatively good mechanical properties at high temperature; the prepared epoxy adhesive film is suitable for various application scenes with high-temperature and high-toughness requirements.

The invention provides refractory concrete and a preparation method thereof, and belongs to the technical field of concrete. The preparation method comprises the following steps: modifying basalt fiber, modifying granite stone powder, grafting and mixing. The step of modifying the granite stone powder comprises the following steps: putting the granite stone powder into an ethanol solution, adding sorbitol laurate and polyoxyethylene sorbitan monolaurate, stirring at the stirring temperature of 46-50 DEG C, uniformly stirring, adding threonine, carrying out ball milling treatment for 26-30 minutes at the ball milling rotating speed of 114-125rpm according to the ball-to-material ratio of (3-5): 1, and after the ball milling is finished, cooling to room temperature to obtain the modified granite stone powder. Filtering and drying to obtain modified granite stone powder; the particle size of the granite stone powder is 135 to 145 nm; the mass concentration of the ethanol solution is 45-50%; the mass ratio of the granite stone powder to the ethanol solution to the sorbitol laurate to the polyoxyethylene sorbitan monolaurate to the threonine is (8.3 to 8.7) to (90 to 97) to (1.0 to 1.2) to (1.1 to 1.5) to (4.5 to 4.9); the prepared refractory concrete is high in strength, excellent in water permeability resistance, good in high-temperature corrosion resistance and low in linear shrinkage rate.

The invention relates to the technical field of epoxy resin, and discloses a polyarylamide modified boron nitride-epoxy resin composite material, hydroxylated nano boron nitride reacts with a diazo group of 4-diazo diphenylamine sulfate to obtain aminated nano boron nitride, the aminated nano boron nitride and a 3, 5-diaminobenzoic acid monomer are subjected to a polymerization reaction to obtain polyarylamide modified boron nitride, and the polyarylamide modified boron nitride-epoxy resin composite material is prepared through the following steps: reacting hydroxylated nano boron nitride with a diazo group of 4-diazo diphenylamine sulfate; the polyarylamide modified boron nitride has good compatibility with epoxy resin, amino-terminated groups can be subjected to ring-opening reaction with epoxy groups of the epoxy resin, nano boron nitride is organically combined with the epoxy resin under the bridging action of polyarylamide, covalent bonds formed between a large number of amino groups on the surface and the epoxy resin in the curing process, and the epoxy resin can be cured to form the epoxy resin. The interface thermal resistance of the filler and the epoxy resin is reduced, the superhigh resistivity of the nano boron nitride, the reduction of agglomeration and the modification of the filler enable the polyarylamide modified boron nitride-epoxy resin composite material to show excellent thermal conductivity.

The invention discloses a hydrogen-corrosion-resistant coating material for a hydrogen-rich electrolyte environment and a preparation method thereof, and relates to the technical field of hydrogen-corrosion-resistant coating materials, the coating material comprises the following components by weight: a metal matrix reinforcing material: 30%-50% of nickel and 5%-10% of cobalt; the ceramic particles comprise 10%-20% of aluminum oxide and 5%-15% of The coating material disclosed by the invention shows excellent corrosion resistance, wear resistance and hydrogen embrittlement resistance in a hydrogen-rich electrolyte environment. The nickel-cobalt alloy layer is kept stable at high temperature and high pressure, hydrogen permeation is blocked, and material degradation is prevented. Aluminum oxide and silicon carbide improve the hardness and wear resistance of the coating, and the coating is kept intact in temperature circulation. The rare earth elements yttrium oxide and cerium oxide enhance the oxidation resistance and hydrogen embrittlement resistance. And the dispersing agent and the cross-linking agent further improve the uniformity, compactness and adhesion of the coating, so that the coating is suitable for industrial parts in high-pressure and high-stress environments.

The invention relates to the technical field of intelligent materials, and discloses a p-MXene conductive ink and BC reinforced polymer composite film and a preparation method and application thereof.The composite film comprises MXene and bacterial cellulose, the surface of the MXene is coated with waterborne polydopamine, waterborne polyurethane is embedded in the bacterial cellulose, and the surface of the MXene is coated with waterborne polyurethane; hydroxyl groups in the water-based polydopamine and amino groups in the water-based polyurethane form hydrogen bonds to connect the MXene with the bacterial cellulose. The composite film obtained by the invention has excellent mechanical properties and electrical properties, and also has comprehensive properties such as electromagnetic shielding and stress-strain sensing.

The invention discloses a preparation method for in-situ generation of an Al3Fe nanoparticle reinforced aluminum-based composite material, and belongs to the technical field of metal-based composite material preparation. Comprising the following steps that (1) mixed powder is prepared, and the mixed powder is weighed according to the mass percent of 3%-13% of nano carbon-coated iron powder and the balance pure Al; (2) carrying out ball-milling treatment on the mixed powder, loading the mixed powder into a ball-milling tank, and carrying out ball-milling treatment on the mixed powder in an argon environment; (3) sintering and molding; (4) carrying out hot extrusion on the sintered composite material block; the tensile strength of the high-volume-fraction in-situ generated Al3Fe nano-particle reinforced aluminum-based composite material at room temperature reaches 473.76 MPa, the hardness reaches 175.47 HV, the tensile strength at high temperature can reach 204.63 MPa, and the high-volume-fraction in-situ generated Al3Fe nano-particle reinforced aluminum-based composite material has the advantages of being high in strength, resistant to abrasion, low in thermal expansion coefficient, excellent in heat-conducting property and the like.

The invention relates to the technical field of powder metallurgy, and discloses a rapid cooling method and device for preparing metal and alloy powder through gas atomization, and the method comprises the following steps: S1, smelting a metal or alloy melt in a smelting chamber until the metal or alloy melt is molten into metal or alloy liquid meeting process requirements, the liquid enters the atomization device through the temperature-resistant metal and alloy liquid corrosion-resistant liquid guide pipe, and the metal or alloy liquid flowing through the atomization device enters the atomization device under the action of sonic inert gas; the device comprises a smelting chamber, an atomizing chamber and an atomizing device, the smelting chamber is arranged above the atomizing device and connected with the atomizing device through a flow guide pipe, the atomizing device is installed above the atomizing chamber, and the atomizing device is communicated with the atomizing chamber. The powder discharging pipe communicates with the atomizing chamber, smooth conveying of metal and alloy powder is achieved, the air powder mixing channel is connected with the extending channel and the expanding channel, the gradually-shrinking and gradually-expanding airflow channel design is formed, and the mixing and cooling efficiency of airflow and powder can be improved.

The invention discloses a preparation method and application of a novel metal-organic framework structure composite material based on fly ash and steel slag, and belongs to the technical field of environmental geotechnical .The preparation method comprises the following steps that aluminum chloride is prepared from fly ash, nanoscale Fe3O4 is prepared from steel slag, and the novel metal-organic framework structure composite material PVA-Fe3O4-Al-MOF is synthesized, the preparation method comprises the following steps: dispersing aluminum chloride into dimethylformamide, and then adding nanoscale Fe3O4 to obtain an aluminum chloride-dimethylformamide-ferroferric oxide mixed solution; the preparation method comprises the following steps: dissolving trimesic acid in dimethylformamide to obtain a trimesic acid-dimethylformamide solution; putting the aluminum chloride-dimethylformamide-ferroferric oxide mixed solution and the trimesic acid-dimethylformamide solution into a reaction kettle, heating to react for a period of time, and then carrying out solid-liquid separation to obtain Fe3O4 (at) Al-MOF; adding the Fe3O4 (at) Al-MOF into an aqueous solution of polyvinyl alcohol, soaking for a period of time, and then filtering to obtain PVA-Fe3O4 (at) Al-MOF;

The invention belongs to the technical field of photocatalytic materials, and provides a foamed ceramic-based catalyst as well as a preparation method and application thereof. The method comprises the following steps: S1, sequentially carrying out surface alkali treatment, surfactant modification and surface grafting modification on an organic foam template to obtain a modified foam template; s2, preparing a plurality of ceramic slurry with different solid contents, wherein the ceramic slurry comprises the following components: a binder, a rheological agent, a dispersant, a plasticizer, a zirconium oxide stabilizer, zirconium oxide, manganese dioxide, titanium dioxide, silicon dioxide and a solvent; s3, according to the slurry hanging sequence of the solid contents from high to low, ceramic slurry with different gradient solid contents is sequentially coated and hung on the surface of the modified foam template, drying and sintering are conducted, and the foamed ceramic-based catalyst is obtained. According to the invention, the surface of the organic foam template is modified, the components of the ceramic slurry are reasonably designed, and the ceramic slurry with gradient solid content is adopted for multiple times of slurry hanging, so that the porosity and compression strength of the foamed ceramic-based catalyst are simultaneously improved.

The invention relates to an ink-jet printing ink formula and a preparation method thereof, and belongs to the technical field of ink preparation. The carbon black color paste specifically comprises the following raw materials in parts by mass: 3 to 7 parts of carboxylated carbon black, 2 to 4 parts of modified protein, 1 to 3 parts of a dispersant, 0.1 to 0.3 part of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 0.1 to 0.12 part of N-hydroxysuccinimide, 1 to 5 parts of a 2-morpholinoethanesulfonic acid buffer solution, 0.1 to 0.3 part of an auxiliary agent and 10 to 50 parts of a composite solvent. The polyethylene glycol modified ethanol clostridium protein is used in the components, and carboxylated carbon black and the dispersing agent are combined, so that the compatibility among the components in the system is improved, and good thermal stability and system stability are achieved while the particle size of the black ink is refined.

The invention belongs to the technical field of high polymer materials, and particularly relates to a graphene nano composite material and a preparation method thereof. The graphene nano composite material is prepared from the following components: graphite powder, APTES (Aminopropyltriethoxysilane), polyvinyl alcohol, nano TiO2, polyethylene glycol dihydric alcohol, trimethylolpropane and isocyanate. The specific preparation steps of the graphene nano composite material are as follows: S1: preparation of graphene oxide; s2, introducing an amino silane group into the graphene oxide; s3, grafting polyvinyl alcohol and nano titanium dioxide; s4, carrying out in-situ polymerization grafting on the modified graphene oxide and polyurethane polyol to obtain a graphene nano composite material; according to the preparation method, the dispersity of graphene in a polyurethane matrix is enhanced through APTES functionalization and PVA grafting, and agglomeration is prevented; the APTES and the polyurethane form a covalent bond, so that the interface bonding is enhanced; pVA increases steric hindrance and improves toughness; tiO2 nanoparticles are stably dispersed, so that the impact resistance and the tensile strength are improved.