459 results about "Sodium molybdate" patented technology

The invention discloses a film coating agent for accelerating stabilization of a weathering resistant steel rust layer in a severe atmospheric environment. The film coating agent comprises a film-forming agent and a spraying agent, the film-forming agent comprises a gel agent and a transforming agent; the gel is prepared from one or more of tannic acid, carbomer, chitosan and gelatin; the transforming agent comprises one or more of magnesium sulfate, zinc sulfate and sodium molybdate; the spraying agent comprises an accelerant and an aggressive agent; the accelerant comprises one or more of sodium sulfate, potassium sulfate and chromium sulfate; the aggressive agent comprises one or more of sodium chloride, aluminum chloride and sodium fluoride. The film coating agent provided by the invention can form a stable and uniform rust layer on the surface of the weathering resistant steel, so that the corrosion resistance of the weathering resistant steel is improved.

The invention relates to the technical field of molybdenum metallurgy, and particularly discloses a crystal preparation method of ammonium heptamolybdate, which comprises the following steps: taking low-grade molybdenite, crushing, ball-milling, and calcining to obtain molybdenum calcine. And dispersing the molybdenum calcine with a sodium hydroxide solution, and filtering to obtain a leaching solution. And then adding a compound chelating agent into the leachate, carrying out adsorption and desorption treatment to obtain a sodium molybdate solution, then adjusting the pH value, carrying out ammonia leaching, and then carrying out cooling crystallization to obtain ammonium heptamolybdate. By adopting the prepared compound chelating agent, the purity of ammonium heptamolybdate prepared by taking low-grade molybdenite as a raw material can be improved, and after desorption treatment, separated precipitates can be used as the compound chelating agent again for adsorbing molybdate radicals, so that the aim of cyclic utilization is achieved.

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 technical field of compound fertilizers, and discloses a boron-zinc-molybdenum synergistic compound fertilizer, which is prepared from the following raw materials in parts by weight: calcium nitrate, ammonium polyphosphate, potassium sulfate, magnesium sulfate, disodium octoborate tetrahydrate, sugar alcohol chelated zinc, sodium molybdate and a synergistic auxiliary agent, the feed additive is prepared from a feed additive, an activator, 5-alginic acid oligosaccharide, aminolevulinic acid, sugar alcohol chelated magnesium, an antagonist, a stress-resistant enhancer and a coating material. According to the boron-zinc-molybdenum synergistic interaction compound fertilizer and the preparation process thereof, the disodium octoborate tetrahydrate, the sugar alcohol chelated zinc and the sodium molybdate are compounded according to a specific proportion, antagonism is avoided through proportion limitation, the synergistic effect of the three elements is remarkably enhanced, and the problem that a single element is insufficient or excessive is solved; chelated elements such as sugar alcohol chelated zinc and sugar alcohol chelated magnesium are combined with an activating agent (humic acid chelated calcium and silica sol) to form a gel-state chelate, so that the trace elements can be prevented from being fixed by soil, and the transfer efficiency of the trace elements in crops is improved.

The invention discloses a fermentation medium for regulating and controlling a clostridium aerovorans target product and a fermentation method of the clostridium aerovorans target product. The medium comprises a basic component and a regulating component, the basic components comprise ammonium chloride, potassium chloride, magnesium sulfate heptahydrate, sodium chloride, monopotassium phosphate, yeast powder, calcium chloride dihydrate, sodium selenite, nickel chloride hexahydrate, biotin, folic acid, pyridoxine hydrochloride, thiamine, riboflavin, nicotinic acid, D-calcium pantothenate, cobalamin, para aminobenzoic acid and lipoic acid; the adjusting component comprises sodium tungstate, ferrous sulfate and sodium molybdate, sodium tungstate and ferrous sulfate have a forward adjusting effect on increasing the yield of acetic acid, ethanol and butanol in the target product, and sodium molybdate has a reverse adjusting effect on the target product. By optimizing the proportion of trace elements in the culture medium, the clostridium metabolism efficiency is improved, synthesis of a target product is regulated and controlled, and the method is particularly suitable for industrial production of acetic acid, ethanol, butanol and the like.

The invention discloses an application of a molybdenum disulfide-based piezoelectric catalytic material in a seawater uranium extraction material, and relates to the technical field of seawater uranium extraction, thiourea and sodium molybdate are used as precursors, and a MoS2 nanoflower with a specific 1T / 2H composite crystal structure is constructed through a hydrothermal synthesis technology. The method is placed in a uranyl nitrate solution, ultrasonic treatment is combined, efficient extraction of uranium can be achieved, and the method has potential application to extraction of uranium from seawater. The method is simple in process and environment-friendly, almost does not generate harmful waste in the synthesis process, does not need complex operation, and has good amplification preparation potential.

The invention discloses a high-dispersion graphene conductive adhesive solution for a battery and a preparation method of the high-dispersion graphene conductive adhesive solution, and belongs to the technical field of conductive adhesive solutions. The high-dispersion graphene conductive adhesive solution for the battery prepared by the invention is prepared from the following raw material components in parts by mass: 6 to 8 parts of high-dispersion graphene, 4.5 to 13.5 parts of an adhesive and 60 to 90 parts of a solvent, the preparation method comprises the following steps: ultrasonically dispersing graphene in a mixed solution of hexadecyl triyl ammonium bromide and deionized water, sequentially adding hexadecyl triyl ammonium bromide, sodium molybdate dehydrate, bismuth nitrate pentahydrate and cerium nitrate hexahydrate, uniformly stirring and dispersing, performing hydrothermal reaction, washing, drying, grinding and sieving to obtain the high-dispersion graphene. The adhesive is prepared from an amphiphilic polyethylene glycol-polycaprolactone block copolymer and amphiphilic polyacrylate.

The invention provides a cocatalyst for promoting Fe < 3 + > reduction in the electro-Fenton application process and a preparation method thereof, and relates to the field of wastewater treatment.The preparation method comprises the steps that sodium molybdate, thiourea and coal gasification fine slag are evenly dispersed in deionized water, the mass ratio of sodium molybdate to thiourea is (0.30-2.5): (1.5-3.5), and a mixed system is obtained; the mixed system is subjected to heat preservation treatment at the temperature of 120-180 DEG C, sodium molybdate is subjected to a reduction reaction with thiourea after being subjected to thermal decomposition, nano lamellar cluster-shaped molybdenum sulfide is obtained, and reaction liquid is obtained; sediments in a reaction solution are subjected to microwave drying and freeze drying to obtain the cocatalyst for promoting Fe < 3 + > reduction in the electro-Fenton application process, Fe < 3 + > reduction can be promoted through valence change of molybdenum ions dissolved out of a solution and the unsaturated property of sulfur, and therefore Fenton reaction is enhanced to generate strong oxidizing free radicals to treat organic wastewater.

The invention belongs to the technical field of aviation static disc materials, and aims to solve the problem that the application of an existing copper-based static disc material in an aviation brake system is limited due to the fact that the comprehensive performance of the existing copper-based static disc material is weak. In order to achieve the purpose, the invention provides the aviation copper-based static disc material and the preparation method thereof. The aviation copper-based static disc material comprises, by mass, 55%-65% of high-purity electrolytic copper, 10%-15% of aluminum bronze alloy, 4%-8% of nano nickel powder, 2%-5% of chromium molybdenum alloy, 2%-6% of nano silicon carbide particles, 1.5%-4% of continuous carbon fiber bundles, 1%-3% of hexagonal boron nitride nanosheets, 0.5%-2% of tungsten carbide particles, 0.5%-2% of multilayer graphene, 0.3%-1.5% of sodium molybdate, 0.5%-1.5% of a coupling agent, 0.2%-1% of a nano lubricant and 0.1%-0.8% of an antioxidant. The comprehensive properties such as strength, hardness, high-temperature wear resistance, friction coefficient stability and corrosion resistance of the aviation copper-based static disc material are remarkably improved, the requirements of an aviation brake system are met, and the aviation copper-based static disc material is particularly suitable for being applied under complex working conditions.

The invention belongs to the technical field of copper foils, and particularly relates to a production process of a copper foil and the copper foils, and the production process of the copper foils comprises the following steps: reacting a copper raw material with sulfuric acid to generate a copper sulfate solution; the copper sulfate solution is electrolyzed, and crude foil is obtained; the raw foil is subjected to surface treatment, the surface treatment comprises a roughening process, in the roughening process, a roughening solution comprises an additive C and an additive D, the additive C comprises one or a mixed solution of two or more of sodium tungstate, sodium molybdate, ammonium molybdate, tin sulfate and titanium sulfate, and the concentration of the additive C is 10-60 ppm; the additive D comprises high-molecular organic matters such as hydroxyethyl cellulose and ethylene glycol, and the concentration of the additive D is 30-50 ppm; and carrying out target temperature treatment on the crude foil subjected to the surface treatment to obtain the copper foil. Through the copper foil production process in the scheme, the peeling strength attenuation rate of the copper foil after high-temperature treatment can be reduced.

The invention discloses a three-dimensional multi-interface heterostructure lithium-sulfur battery interlayer, a preparation method thereof and a lithium-sulfur battery, and the preparation method comprises the following steps: placing acidified carbon cloth in a mixed solution of cobalt nitrate, nickel nitrate and hexamethylenetetramine for primary hydrothermal reaction to prepare NiCo2O4 (at) CC; the NiCo2O4 (at) CC is placed in a mixed solution of nickel chloride and sodium molybdate, a secondary hydrothermal reaction is carried out, and NiMoO4 (at) NiCo2O4 (at) CC is obtained; according to the preparation method, NiMoO4-coated NiCo2O4-coated CC is subjected to thermal reduction annealing in a mixed atmosphere of hydrogen and argon, the three-dimensional multi-interface heterostructure lithium-sulfur battery interlayer is prepared, active sites of the three-dimensional heterostructure are increased, the oxidation-reduction reaction efficiency under high sulfur loading capacity is improved, the nano-particle anchored amorphous nanosheets form the multi-interface heterostructure, and the performance of the lithium-sulfur battery is improved. Good chemical adsorptivity and catalytic conversion on polysulfide in the battery are realized, and the cycle life of the battery is prolonged.

The invention provides a culture method for improving immunity of fishes. The culture method comprises the following steps: S1, selection of culture points; S2, specification and layout of net cages; S3, selection and throwing of fish fries; according to the fry disinfection method disclosed by the invention, the fry are soaked and disinfected by using a compound disinfectant prepared from povidone iodine, polysorbate, citric acid and vitamin C in a specific proportion, so that pathogenic microorganisms on the surfaces and gill parts of fish bodies are effectively killed. According to the breeding management, the immunity of the fish body is comprehensively enhanced by feeding the fish with an immune conditioner composed of campesterol palmitate, immunomodulatory peptide, beta-glucan and astaxanthin in a specific proportion. According to the bottom mud management, the content of harmful substances is reduced by putting a bottom mud modifier composed of sodium molybdate, nitrifying bacteria, photosynthetic bacteria, tetrandrine and sodium alginate in a specific proportion, growth of pathogenic bacteria is inhibited, nutrient substance circulation is promoted, the water quality environment is optimized, and healthy growth of fry is promoted.

The invention discloses a self-template synthesized linear biochar-based bimetallic material as well as a preparation method and application thereof, and belongs to the technical field of carbon materials. The method comprises the following steps: pretreating ganoderma lucidum residues, and pyrolyzing in a nitrogen atmosphere to prepare charcoal; and mixing the prepared biochar with cobalt nitrate and sodium molybdate to prepare CoMoO4 nanoparticles with in-situ growth of the biochar, and then washing and drying to obtain the BC-coated CoMoO4 linear biochar-based bimetallic material. Heterojunctions formed by binding sites of cobalt-molybdenum bimetal and biochar in the material form more defect sites, the synergistic effect of the metal and the micro-nano fibrous biochar is exerted, the degradation rate in the application of catalytic degradation of bisphenol A can reach 98.18% or above, a multiple reaction mechanism with sulfate free radicals is jointly shown, and the photocatalytic degradation of bisphenol A is realized. And the method has higher adaptability and effectiveness for complex pollutants.

The invention provides an anaerobic gas-feeding bacterium subjected to mutagenesis screening and application of the anaerobic gas-feeding bacterium in high-yield acid production through synthesis gas conversion. The anaerobic gas-feeding bacterium is a Clostridium sp. Strain P38 strain, and the preservation number of the anaerobic gas-feeding bacterium is CGMCC (China General Microbiological Culture Collection Center) No.46262. According to the invention, an acid-producing Clostridium sp. Strain P38 strain is obtained through ARTP mutagenesis screening, and through optimization of culture conditions, especially addition of sodium molybdate in a culture system and control of the pH value of the culture system, the maximum concentration of bacteria fermented by the anaerobic gas-feeding bacteria Clostridium sp. Strain P38 and the capability of fermentation acid production are improved, the maximum cell concentration of the strain can reach OD600nm-2. 0Abs, the maximum acetic acid yield is 5g / L, and the hexanoic acid content is 3.5 g / L.

The present invention provides a preparation method of high-viscosity hydroxypropyl methylcellulose. A preparation method of high-viscosity hydroxypropyl methylcellulose comprises the following steps: grinding and alkalizing refined cotton cellulose; adding methyl chloride and propylene oxide for etherification reaction; successively adding a crosslinking agent and an aqueous fulvic acid solution for reaction; adding potassium naphthylacetate, sodium sulfite and sodium molybdate and then drying. In the present invention, during the etherification reaction of alkalized cellulose, a crosslinking agent prepared by mixing sodium tetraborate and sodium tripolyphosphate is added for crosslinking reaction, which can reduce the content of water-soluble groups of the prepared hydroxypropyl methylcellulose, achieving the effect of increasing the viscosity of hydroxypropyl methylcellulose. Coating the crop surface with the high-viscosity hydroxypropyl methylcellulose not only has a better surface glazing effect, but also can increase its sugar content.

The invention discloses a chromium-free fingerprint-resistant coating agent for a galvanized steel sheet and a preparation method of the chromium-free fingerprint-resistant coating agent. The chromium-free fingerprint-resistant coating agent is prepared from the following elements in percentage by mass: 1%-5% of sodium molybdate or / and sodium tungstate, 0.5%-2% of a phytic acid-chitosan compound, 0.3%-1.0% of a chelating titanate coupling agent, 2%-5% of fluorosilane modified nano SiO2, 30%-55% of waterborne hyperbranched polyurethane resin, 0.5%-2% of oxidized polyethlene wax and the balance of deionized water. The chromium-free fingerprint-resistant coating agent disclosed by the invention has excellent fingerprint resistance, high adhesive force and environmental protection property, is free of white rust in neutral salt mist for 150 hours and red rust in neutral salt mist for 360 hours, the white rust area is less than 5%, the industrial requirements of galvanized steel sheet surface treatment are met, and the problem of environmental risk in the prior art is avoided by adopting the combination of bio-based corrosion inhibitors.

The invention discloses a method for preparing a core-shell structure phase hydrorefining catalyst, comprising the following contents: (1) gelling, aging and filtering a first precipitant, a sodium molybdate solution and a solution containing Ni and Si to obtain a filter cake of a first slurry, and then treating it with a mixed aqueous solution of aluminum salt and organic alcohol to obtain a mixed slurry; (2) adding a Ni-containing solution, a sodium tungstate solution, a second precipitant and the mixed slurry obtained in step (1) to a reactor containing water and an oily liquid to gel and age them to generate a second slurry; (3) filtering, drying and molding the slurry to obtain a molded product; (4) soaking the molded product in an organic acid solution, and desalting the soaked molded product to obtain a catalyst. The preparation process of the method is clean and pollution-free, and the prepared catalyst has a core-shell structure, a large pore volume and a large pore size, and is used in processes such as distillate hydrodesulfurization and denitrogenation, and has high hydrodesulfurization and hydrodenitrogenation reaction performance.

The invention discloses an anti-sulfate-attack preparation method of solid waste concrete, and relates to the technical field of building materials and civil engineering, the anti-sulfate-attack solid waste concrete is prepared from the following materials in parts by weight: 100 parts of cement, 30-50 parts of composite solid waste cementing material, fly ash, steel slag micro powder and coal gangue according to a given mass ratio, 60-80 parts of modified recycled aggregate; 0.05-0.1 wt% of sodium molybdate as an erosion inhibitor. According to the invention, solid waste activation-interface reconstruction-ion competition-structure self-healing is taken as a core, synchronous spanning of solid waste concrete in the dimensions of sulfate erosion resistance, resource consumption, construction convenience and the like is realized through multi-process collaboration, and the gelation potential of solid wastes such as fly ash and steel slag is accurately excited through microwave targeted activation, so that the construction efficiency is improved. And a dense microstructure is reconstructed by combining a nano-SiO2 induced crystallization technology, so that excellent mechanical properties are still ensured when the solid waste mixing amount exceeds 70%.

The invention relates to the technical field of wave absorbing materials, and to a preparation method of a flaky carbonyl iron / molybdenum disulfide composite wave absorbing material and corresponding materials, comprising: adding sodium dodecylbenzene sulfonate, sodium molybdate, and thiourea to an ethanol solution according to a ratio and stirring to obtain a precursor solution; placing the precursor solution in a reactor for hydrothermal reaction to obtain a hydrothermal reaction solution, centrifugally washing the hydrothermal reaction solution to obtain a hydrothermal reaction product, vacuum drying the obtained hydrothermal reaction product to obtain a molybdenum disulfide nanomaterial; mixing the molybdenum disulfide nanomaterial with flaky carbonyl iron according to a ratio and grinding to obtain a mixed powder, bonding the mixed powder to obtain a flaky carbonyl iron / molybdenum disulfide composite wave absorbing material. The preparation method of the flaky carbonyl iron / molybdenum disulfide composite wave absorbing material and the corresponding materials of the invention can prepare a wave absorbing material with excellent electromagnetic wave absorption performance and can meet the absorption requirements of different frequency bands.

The invention provides a preparation method of high-purity molybdenum trioxide, which belongs to the technical field of molybdenum trioxide production and comprises the following steps: S1, crushing, grinding and roasting molybdenum ore sand to obtain crude molybdenum oxide, adding the crude molybdenum oxide into a sodium hydroxide solution, heating, stirring and filtering to obtain a crude sodium molybdate solution; s2, adjusting the pH value of the crude sodium molybdate solution to 5.5-7.0, introducing the crude sodium molybdate solution into an exchange column of macroporous cation exchange resin, then adjusting the pH value of the solution to 7.0-8.5, and introducing the crude sodium molybdate solution into an exchange column filled with anion exchange resin to obtain a high-purity sodium molybdate solution; s3, excessive ammonia water is added into the high-purity sodium molybdate solution, ammonium molybdate is separated out, washing and drying are conducted, and high-purity ammonium molybdate is obtained; and S4, the high-purity ammonium molybdate is put into a rotary calcining furnace, rare earth oxide is sprayed on the inner wall of a furnace tube, and the high-purity molybdenum trioxide is prepared by adopting a calcining mode of firstly heating, then cooling and then heating. According to the invention, the purpose of producing high-purity molybdenum trioxide is realized.

The invention provides a new energy automobile battery flexible disassembling adhesive and a preparation method thereof, and belongs to the technical field of new energy automobile batteries, the flexible disassembling adhesive comprises the following components by weight: 45-50 parts of deionized water; 8 to 10 parts of gamma-butyrolactone; 5 to 8 parts of propylene glycol methyl ether acetate; 2 to 3 parts of microencapsulated lipase; 2 to 3 parts of nano cellulose immobilized protease; 6 to 8 parts of urea peroxide; 0.5 to 1 part of nano manganese dioxide; 0.7 to 1.1 parts of a sodium citrate / sodium lactate buffer solution; 1.5 to 2.5 parts of polyvinylpyrrolidone K30; 0.8 to 1.2 parts of hydroxypropyl methyl cellulose; 0.05 to 0.1 part of a graphene oxide nanosheet; 0.5 to 0.8 part of a benzotriazole derivative; 0.1 to 0.3 part of sodium molybdate; 6 to 8 parts of sorbitol; and 5-7 parts of ascorbic acid. The flexible disassembly adhesive solves the problems of low efficiency, serious environmental pollution, high safety risk and low material recovery rate in traditional battery disassembly.

A method of forming a lubricant coating, a method of coating a bearing surface with a lubricant coating, and a vehicle including a bearing including a lubricant coating. A substrate, such as a bearing, including a surface and an electrode are immersed in an electrolyte bath. The electrolyte bath includes an aqueous electrolyte solution including sodium metabisulfite (Na2S2O5), sodium molybdate (Na2MoO4·2H2O), a pH modifier, an anionic surfactant, and water. A first pulsed direct current is applied through the aqueous electrolyte solution using a direct current power supply and a molybdenum disulfide (MoS2) layer is formed on the surface of the substrate.

According to the low-temperature plasma activated water preparation system, the preparation method and the application, a direct-current voltage-driven air jet plasma generation device which is small and convenient and does not need a complex gas circuit is utilized in the preparation system, and air is adopted as working gas to treat an aqueous solution; an aqueous solution rich in active oxygen, active nitrogen and other active ingredients is efficiently generated, and the active ingredients have high oxidation-reduction potential and can effectively degrade PhSMe. The concentration of active particles in PAW is improved by optimizing the discharge voltage, the discharge time and the concentration of the sodium molybdate solution, so that the degradation effect of PhSMe is improved. An auxiliary agent sodium molybdate is introduced in the degradation process, and the degradation effect is two times higher than the pure PAW treatment effect.

The application provides a weathering steel surface rust layer stabilizing treatment agent for industrial atmospheric environment, and the chemical composition of the weathering steel surface rust layer stabilizing treatment agent is as follows in terms of mass fraction: 25-45% of acrylic resin, 2.0-6.0% of chromium sulfate, 3.0-8.0% of ferrous oxide, 2.0-6.0% of ferric oxide, 0.5-3.5% of copper sulfate, 0.3-1.5% of sodium bisulfite, 1.0-6.0% of sodium molybdate, 0.5-3.5% of nickel sulfate, 2.0-5.0% of potassium phosphate, 0.05-0.5% of surfactant, 0.05-0.5% of defoaming agent, 0.05-0.5% of dispersing agent, 0.05-0.5% of thickening agent, and the balance is water, wherein the amount of plasticizer added is 2-5% of the resin. The stabilizing treatment agent in the application can promote the weathering steel surface to form a stable and dense rust layer within 0.5-1 year after the surface of the weathering steel is treated before use.

The invention relates to the technical field of epoxy resin coatings, and particularly discloses a low-corrosion snow-melting and deicing coating and a preparation method thereof. The low-corrosion snow-melting and deicing coating comprises a component A, a component B and a component C in a mass ratio of 100: (40-50): (90-100), and the component A comprises the following raw materials: 100 parts of epoxy resin, 15-25 parts of a polyurethane elastomer, 2-5 parts of an epoxy reactive diluent, 0.5-1 part of a defoaming agent, 2-5 parts of a silane coupling agent and 30-50 parts of a microcapsule snow-melting agent; the component B comprises the following raw materials in parts by weight: 40-60 parts of a polyamide curing agent and 5-10 parts of phytic acid; the component C comprises a reinforcing filler; the microcapsule snow-melting agent comprises a core material and a polyurethane wall material wrapping the core material, wherein the core material comprises potassium acetate and sodium molybdate in a mass ratio of 100: (2-4). According to the invention, the slow release effect of the snow-melting agent in the snow-melting and deicing coating can be improved, and the coating has excellent low corrosion and cracking resistance.

The invention discloses a highly antibacterial fabric and a preparation process thereof, and relates to the technical field of antibacterial fabrics, the highly antibacterial fabric comprises a composite fabric layer, an antibacterial adhesion layer, a zinc coating, a cotton fabric base material and a nano-silver antibacterial layer; the composite fabric layer is prepared from a polycaprolactone spinning solution and a polylactic acid spinning solution through electrostatic spinning, the polycaprolactone spinning solution is prepared from a polycaprolactone solution and a composite heterojunction suspension through mixing, and a composite heterojunction in the composite heterojunction suspension is prepared from sodium molybdate dihydrate and zinc through a hydrothermal method; the antibacterial adhesion layer is prepared from menthol modified polyacrylate; the zinc coating is prepared from a zinc target material through magnetron sputtering; the nano-silver antibacterial layer is prepared from hinokitiol modified chitosan through in-situ reduction of silver nitrate.

The invention relates to a preparation method of an aluminum alloy corrosion-resistant composite coating, and belongs to the technical field of aluminum alloy treatment. The method comprises the following steps: firstly, mixing sodium phosphate, sodium silicate, sodium fluoride, ammonium metavanadate, sodium molybdate and sodium hydroxide according to a specific proportion to prepare a micro-arc oxidation liquid medicine, and carrying out micro-arc oxidation treatment on a pretreated aluminum alloy to form a black micro-arc oxidation coating; then, potassium permanganate and hydrogen peroxide are used for treating the multi-walled carbon nanotubes, zinc elements are introduced into the carbon nanotubes, the carbon nanotubes and the graphene oxide are combined through ball milling treatment, meanwhile, a silane coupling agent KH560 is added, compatibility is further enhanced, and the composite filler is obtained. And the composite filler is mixed with water-based acrylic resin emulsion, water-based polyurethane emulsion and the like to prepare an electrophoretic coating, and the aluminum alloy subjected to micro-arc oxidation is subjected to electrophoretic deposition treatment to obtain the composite coating. The aluminum alloy corrosion-resistant composite coating prepared through the method has excellent absorbance and good corrosion resistance.

The present invention provides a method for preparing high-purity molybdenum trioxide, belongs to the technical field of molybdenum trioxide production, and comprises the following steps: step S1, molybdenum ore is crushed and ground, roasted, crude molybdenum oxide is obtained, added to sodium hydroxide solution, heated and stirred, filtered, and crude sodium molybdate solution is obtained; step S2, the crude sodium molybdate solution is adjusted to pH 5.5-7.0, an exchange column of macroporous cation exchange resin is passed, and the solution pH is adjusted to 7.0-8.5, and an exchange column equipped with anion exchange resin is passed to obtain a high-purity sodium molybdate solution; step S3, excessive ammonia water is added to the high-purity sodium molybdate solution, ammonium molybdate is precipitated, washed, and dried to obtain high-purity ammonium molybdate; step S4, high-purity ammonium molybdate is put into a rotary calcining furnace, the inner wall of the furnace tube is sprayed with rare earth oxide, and a calcination mode of first heating, then cooling, and then heating is adopted to prepare high-purity molybdenum trioxide. The present invention realizes the purpose of producing high-purity molybdenum trioxide.

The present invention provides a method for producing a molybdenum-vanadium-aluminum-chromium alloy with high uniformity. The composition of the molybdenum-vanadium-aluminum-chromium alloy is as follows: Mo 25% - 28%, V 24% - 27%, Cr 28% - 31%, with the balance being Al, O ≤ 0.05%, C ≤ 0.05%, and the segregation of the main content being < 0.6%. It relates to the field of metallurgical technology. The technological steps are as follows: (1) Prepare an ammonium molybdate-ammonium dichromate-ammonium metavanadate precursor by hydrothermal method using sodium molybdate, sodium metavanadate, sodium dichromate, and ammonium chloride; (2) Perform high-temperature treatment on the precursor to obtain a MoO3 / V2O5 / CrO3 composite material; (3) Mix the MoO3 / V2O5 / CrO3 composite material, refined aluminum powder, and calcium oxide in proportion, load them into a furnace and ignite to undergo a thermite reaction to obtain a molybdenum-vanadium-aluminum-chromium alloy ingot. Compared with the molybdenum-vanadium-aluminum-chromium alloy produced by the traditional thermite method, the uniformity of the present invention is greatly improved, and it can be used for the production of titanium alloys such as TB2, TB9, TB15, and TB16.

The invention relates to the technical field of PE pipes, in particular to a PE pipe and a preparation method thereof. The PE pipe is prepared from, by weight, 40-60 parts of polyethylene, 6-8 parts of filler, 4-6 parts of auxiliaries, 4-6 parts of silicon dioxide, 2-4 parts of stabilizer and 2-4 parts of antioxidant. According to the invention, the filler is added in the preparation process of the PE pipe, and the coconut shell forms a porous carbon structure after being carbonized and ground, so that the interface bonding force between the materials can be effectively enhanced, and the coconut shell is uniformly dispersed in a PE matrix to bear part of external force and play a role in structure enhancement; thiomolybdate ions generated by thioacetamide and sodium molybdate can uniformly precipitate and grow on the surface and in pores of the coconut shell powder, and are tightly combined with the coconut shell powder, so that the structural stability of the PE pipe is effectively improved.