226 results about "Chloroplatinic acid" patented technology

The invention relates to a preparation method of Pt monatomic nano-enzyme and application of Pt monatomic nano-enzyme in cardiac troponin I. The preparation method comprises the following steps: 1) ultrasonically dispersing cobalt salt, selenium powder, chloroplatinic acid, urea and sodium chloride in an alcohol solvent, heating and stirring until the solvent is completely volatilized to obtain a solid mixture, and grinding the solid mixture into powder; and 2) placing the powder in a heating device, carrying out Joule heat treatment in an air atmosphere, washing a reactant, and carrying out vacuum drying to obtain the Pt monatomic nano-enzyme. Se doping is introduced in the one-step chemical reaction process to construct oxygen vacancies, rapid heating and structural shaping are achieved in combination with Joule heat treatment, the Se-doped Co3O4-loaded Pt monatomic catalyst is obtained, the oxygen vacancies and Se doping sites are synergistically used as anchoring sites, Pt monatomic atoms are effectively fixed, and the loading capacity and dispersity of the Pt monatomic atoms are improved. The obtained material shows excellent POD-like enzyme activity, can be used for constructing a high-sensitivity colorimetric immunoassay system, and realizes rapid and accurate detection of cTnI.

The invention discloses a fuel cell cathode catalyst and a preparation method thereof, and belongs to the technical field of fuel cells. The preparation method of the fuel cell cathode catalyst comprises the following steps: adding a modified multi-walled carbon nanotube into a chloroplatinic acid aqueous solution with the mass concentration of 5g / L, carrying out ultrasonic treatment at 30-50 DEG C for 1-2 hours, and then carrying out freeze drying; and putting the dry powder into a horizontal tube furnace, introducing inert gas as protective gas, heating to 450-500 DEG C, preserving heat for 1 hour, cooling to room temperature along with the furnace, and taking out to obtain the fuel cell cathode catalyst. The modified multi-walled carbon nanotube is MWCNT / PEI / 5-formyl-2-thiopheneboronic acid, and the 5-formyl-2-thiopheneboronic acid is grafted after the PEI is grafted on the surface of the MWCNT, so that the dispersity of the MWCNT can be obviously improved, the agglomeration phenomenon of the MWCNT is reduced, the dispersion is more uniform, the loading capacity of platinum is high, the electrocatalytic activity of the catalyst is obviously enhanced, and the dosage of platinum is reduced.

The invention discloses a method for preparing a carbon monoxide normal-temperature oxidation catalyst by using electrolytic manganese residues and oil sludge, which comprises the following steps: uniformly mixing the oil sludge and the electrolytic manganese residues to obtain manganese oil sludge, uniformly stirring the manganese oil sludge and mixed halophilic desulfurizing bacteria, fermenting, and drying to constant weight to obtain fermented manganese oil sludge, the method comprises the following steps: carbonizing dry fermented manganese oil sludge to obtain a manganese carbide oil material, uniformly mixing the manganese carbide oil material with a blueberry extract to obtain a manganese carbide oil extract mixture, uniformly mixing and stirring the obtained manganese carbide oil extract mixture with a chloroplatinic acid solution, standing, filtering, washing, and drying to obtain the mixed halophilic desulfurizing bacteria. Drying to constant weight to obtain a platinum-doped carbonization extraction precursor, and finally roasting the platinum-doped carbonization extraction precursor to obtain the carbon monoxide oxidation catalyst. The composite catalyst with high specific surface area and multiple active sites is formed, and resource utilization of waste is achieved.

The invention discloses a method for determining the content of hydrogen ions in a chloroplatinic acid solution, and belongs to the technical field of analytical testing. In order to solve the problems that the chloroplatinic acid solution is yellow after being diluted and the manual titration end point is difficult to judge, a potentiometric titration method is adopted, and the end point is determined by measuring electrode potential mutation without depending on indicator color change. The method comprises the steps of test condition preparation, burette calibration, standard solution preparation and calibration, sample treatment and titration, result calculation and the like, a full-automatic potentiometric titrator is selected, the titration volume is controlled within the range of 10-15 mL, and a sodium hydroxide standard solution is used for sample titration after calibration. The relative standard deviation of the determination result is less than 0.5%, the adding standard recovery rate is between 96.3% and 103.1%, and the method has the characteristics of high analysis speed, high accuracy and good stability, is suitable for accurate detection of hydrogen ions in chloroplatinic acid production and quality inspection, and effectively solves the defects of the traditional method.

The invention relates to a platinum-zinc alloy supported nitrogen-doped porous multi-layer carbon material and preparation and application thereof, the carbon material takes a rod-like graded porous carbon nanomaterial as a carrier, and platinum-zinc alloy particles and zinc monatomic are jointly supported on the surface of the carrier; the preparation method comprises the following steps: S1, adding zinc acetate and hexadecyl trimethyl ammonium bromide into DMF (Dimethyl Formamide), carrying out ultrasonic treatment, adding into a polyacrylonitrile solution, and stirring; s2, performing electrostatic spinning on the obtained spinning precursor solution; s3, adding the obtained nanofiber into a zinc acetate dihydrate solution, then adding a dimethylimidazole solution, carrying out hydrothermal reaction, soaking the obtained product in a chloroplatinic acid methanol solution, and then carrying out freeze drying; and S4, heating carbonization is carried out under the protection of an inert atmosphere, then annealing and cooling are carried out, and the PtZn-Zn-N4-HPCNFs material is obtained. Compared with the prior art, the catalytic performance and the like in the reaction processes of oxygen reduction reaction (ORR), chlorine evolution reaction (CER) and the like can be effectively improved.

The invention belongs to the technical field of rhenium alloy materials, and particularly relates to a high-strength rhenium alloy material and a preparation method thereof. The rhenium alloy material is prepared from the following raw materials in percentage by mass: 12 to 24 weight percent of molybdenum, 6 to 9 weight percent of niobium, 2 to 5 weight percent of cobalt, 1 to 3 weight percent of tungsten, 0.5 to 1.2 weight percent of modified tantalum carbide, 3 to 6 weight percent of high-entropy rare earth and the balance of rhenium and other inevitable impurities. The modified tantalum carbide is prepared by the following preparation process: adding tantalum chloride, zirconium oxychloride and phenolic resin into a mixed solution of acetylacetone and n-butyl alcohol, stirring for 1-2 hours under a heating condition, dropwise adding ammonia water, continuously stirring for 0.5-1 hour, and drying to obtain a precursor; calcining the precursor, and cooling to obtain the modified tantalum carbide. The rhenium alloy prepared through the method has high hardness, good bending strength and excellent high-temperature mechanical property.

A preparation method of a platinum-boron aluminum catalyst for dehydrogenation of methylcyclohexane comprises the following steps: step 1, taking aluminum nitrate nonahydrate, adding CTAB (cetyltrimethyl ammonium bromide), and pouring absolute ethyl alcohol into a beaker A; adding boric acid and deionized water into a beaker B, and pouring the solution in the beaker B into the beaker A; slowly dropwise adding ammonia water into the beaker A, then adding absolute ethyl alcohol, and aging; evaporating the solution in the beaker A, drying in a drying oven, and finally putting in a muffle furnace; preparing a B-O-Al carrier with a large specific surface area; step 2, putting the B-O-Al carrier with the large specific surface area and absolute ethyl alcohol into a beaker, then adding a chloroplatinic acid solution, then putting the beaker into ultrasonic waves for oscillation, and then putting the beaker into a drying oven for drying to obtain a Pt / B-O-Al (unreduced) catalyst; and putting the Pt / B-O-Al (unreduced) catalyst into a tubular furnace, and reducing the Pt / B-O-Al (unreduced) catalyst under the condition of H2 to finally obtain the Pt / B-O-Al catalyst. The catalyst has the characteristics that the low-temperature requirement is low, the sintering inactivation resistance is high, and high-efficiency, long-life and stable dehydrogenation can be realized under the low Pt loading capacity (1wt%).

The invention discloses a carbon-doped carbon nitride nanotube as well as a preparation method and application thereof in photocatalytic reaction, and belongs to the technical field of inorganic photocatalytic nano materials. Comprising the following steps: roasting urea, melamine and 2, 4, 6-triaminopyridine under protective gas; adding the carbon-doped carbon nitride nanotube, 5-hydroxymethylfurfural and chloroplatinic acid hexahydrate into the deionized water; photocatalytic hydrogen evolution is started to cooperate with selective oxidation reaction of 5-hydroxymethylfurfural. The carbon-doped carbon nitride prepared by the preparation method disclosed by the invention is in a nanotube shape; and the catalyst can be effectively applied to solar photocatalytic hydrogen evolution to cooperate with selective oxidation of 5-hydroxymethylfurfural to generate 2, 5-diformyl furan. The invention mainly solves the problems that the value-added reaction cooperated with the hydrogen production process cannot be realized and the overall economic value cannot be improved in the traditional hydrogen production means. The method is an effective, practical and simple method, is suitable for laboratory preparation and industrial production, and has huge development space and application prospect.

The invention relates to the technical field of adhesive preparation and application, in particular to a high-voltage-resistant damp-heat-resistant organosilicon sealant for a new energy power system. The organic silicon sealant is prepared from a component A, a component B and a platinum-ionic liquid catalyst, the component A is prepared from the following components: modified boron-nitrogen heterocyclic polysiloxane, a fluorine-containing siloxane composite filler, 3-epoxypropoxy propyl triethoxy silane and 2, 5-dimethyl hexynediol; the component B is prepared from the following components: hydrogen-terminated silicone oil, perfluorononyl polydimethylsiloxane, nano zinc oxide and gamma-methacryloxy propyl trimethoxy silane; and the platinum-ionic liquid catalyst is prepared from chloroplatinic acid and 1-butyl-3-methylimidazolium hexafluorophosphate. The high-pressure-resistant damp-heat-resistant organic silicon sealant provided by the invention has better heat-conducting property and high-pressure resistance, after 1200h damp-heat aging treatment, the retention rates of the heat conductivity and the volume resistivity are both greater than 91%, and the sealant has good extreme damp-heat weather resistance.

The invention discloses imprinted resin, a preparation method thereof and application of the imprinted resin in platinum recovery. The preparation method of the imprinted resin comprises the following steps: S1, carrying out nucleophilic substitution reaction on chloromethyl polystyrene resin and N-(2-mercaptoethyl) acrylamide in a solvent, and collecting the resin after the reaction is finished; s2, adding a chloroplatinic acid solution into the resin obtained in the step S1, and carrying out a coordination reaction; s3, adding a cross-linking agent and an initiator into the system obtained in the step S2, carrying out polymerization reaction, and collecting resin after the reaction is finished; and S4, adding an eluent into the resin obtained in the step S3, and desorbing chloroplatinic acid radical ions to obtain the imprinted resin. The imprinted resin provided by the invention has high selectivity, high adsorption capacity and good regeneration performance on chloroplatinic acid radical ions, and is suitable for efficient recovery and resource utilization of platinum.

The invention discloses a wear-resistant EVA material and a preparation method thereof, and relates to the technical field of high polymer materials. When the wear-resistant EVA material is prepared, nano cellulose and a triazole type ultraviolet absorbent react to prepare modified nano cellulose; the preparation method comprises the following steps: sequentially reacting silicon dioxide with 4-anilinoethyltriethoxysilane and 4-vinylaniline to prepare modified silicon dioxide; reacting the ethylene-vinyl acetate copolymer with allyl dichlorophosphine and eugenol in sequence to prepare a modified ethylene-vinyl acetate copolymer; melting and mixing the modified ethylene-vinyl acetate copolymer, the modified nanocellulose, the modified silicon dioxide, hydrogen-containing silicone oil and chloroplatinic acid, and performing compression molding to obtain the wear-resistant EVA material. The wear-resistant EVA material prepared by the invention has excellent wear resistance, flame retardance and aging resistance.

The invention discloses a Karstedt catalyst and a preparation method thereof, and belongs to the technical field of catalysts. The preparation method provided by the invention comprises the following steps: firstly, chloroplatinic acid reacts with three different siloxanes to generate a zero-valent platinum complex, the siloxanes are tetradimethyl vinyl siloxy silane, tetramethyl divinyl disiloxane and 1, 3-dimethyl-1, 1, 3, 3-tetraethylene disiloxane, calcium oxide is added in the reaction to be matched with sodium bicarbonate to neutralize, and then the zero-valent platinum complex is obtained. And after the reaction, reducing residual bivalent platinum by using sodium borohydride, and finally loading by using an SBA15 molecular sieve as a carrier to obtain the finished product Karstedt catalyst. The multi-ligand Karstedt catalyst is formed by combining a tetradentate ligand, a conventional chain ligand and a branched chain polyvinyl ligand, the multi-ligand Karstedt catalyst has high catalytic activity and stability, the loading capacity and the loading binding force are improved through a network architecture of a complex configuration, the dosage of the supported catalyst is reduced, and the cyclic utilization rate is improved.

The preparation method mainly comprises the following steps: dissolving chloroplatinic acid, lanthanum salt and manganese salt in water according to a certain proportion, adding a complexing agent, adjusting the pH value, and carrying out gelation, drying and high-temperature calcination to obtain a perovskite precursor; and treating in a reducing atmosphere, so that platinum atoms are selectively dissolved out from crystal lattices, high-dispersion platinum nanoparticles are formed on the surface, and finally, the composite catalyst with extremely low platinum loading capacity is obtained. According to the method, platinum species are stably anchored through the perovskite carrier, the platinum atom utilization rate and catalytic stability are remarkably improved, excellent electrocatalytic activity and durability are shown in the oxygen reduction reaction, and the method can be widely applied to energy conversion equipment such as zinc-air cells and fuel cells and has important practical application value.

The invention discloses a preparation method of a titanium anode for disinfecting a swimming pool. The preparation method comprises the following steps: carrying out surface pretreatment on a titanium substrate; preparing a coating solution A, a coating solution B, a coating solution C and a coating solution D, wherein the coating solution A is a chloroplatinic acid n-butyl alcohol solution with the concentration of 0.05-0.1 mol / L; the coating liquid B is an n-butyl alcohol mixed solution containing chloroplatinic acid and tantalum pentachloride, and the total metal ion concentration of the coating liquid B is 0.05-0.1 mol / L; the coating liquid C is an n-butyl alcohol mixed solution containing chloroplatinic acid and ruthenium trichloride, and the total metal ion concentration of the coating liquid C is 0.6-0.8 mol / L; the coating liquid D is a butanol solution containing ruthenium trichloride, and the total metal ion concentration of the coating liquid D is 0.3-0.5 mol / L; and the surface of the titanium substrate is sequentially coated with the coating liquid of all the coatings, drying and sintering treatment are conducted after coating of each coating, and a compact bottom layer, a middle buffer layer, a transition layer and a surface active layer are sequentially formed. According to the preparation method of the titanium anode for disinfecting the swimming pool, an optimized micro-crack structure which is controlled in crack number, small in size and uniform in distribution is constructed, so that the service life of the anode is remarkably prolonged while the efficient disinfecting capacity is guaranteed. The invention also provides the titanium anode prepared by the method.

The invention relates to a preparation method of a hydrolysis modified organic silicon high-temperature-resistant anticorrosive coating, and belongs to the technical field of anticorrosive coatings. The preparation method comprises the following steps: heating 1, 1 '-bis (dimethylsilyl) ferrocene, methylbenzene, chloroplatinic acid, 2, 2, 3, 3, 4, 4, 4-heptafluorobutyl acrylate and bis-(2-methylallyl) cyclooctyl-1, 5-diene ruthenium, and reacting to obtain an intermediate product 1; weighing methyltrimethoxysilane, phenyltrimethoxysilane and the intermediate product 1, uniformly stirring and mixing, slowly dropwise adding diluted hydrochloric acid, hydrolyzing, and heating to react, so as to obtain modified silicon resin; adding the modified silicon resin into petroleum ether, and adding silicone oil, an organic tin catalyst, a bis-ammonia coupling agent, filler and a curing agent to obtain the anticorrosive paint.

The present application relates to the technical field of catalytic hydrogenation reaction, and discloses a preparation method and application of an organic phosphine shell modified nanocatalyst, which comprises the following steps: adding a carbon carrier in an alcohol solvent and ultrasonic dispersion, then adding a chloroplatinic acid containing alcohol solution, and stirring at 0-15 DEG C; subsequently, an organic phosphine containing alcohol solution and a reducing agent are added, and the stirring is continued; finally, rotary evaporation is carried out, and drying is performed to obtain the nanocatalyst; the nanocatalyst is a platinum catalyst with a core-shell structure loaded on the surface of the carbon carrier. By introducing the organic phosphine ligand to the surface of the nanometer platinum particles, the core-shell structure nanoparticles with a flexible organic phosphine ligand modified shell are constructed, the adsorption and desorption strength and configuration of the active site electronic structure, the reaction microenvironment, the reactants and the intermediate state of the reaction interface are regulated, and the selective and efficient hydrogenation of the aromatic hydrocarbon containing nitro or carbon-carbon double bond is realized.

The application discloses a platinum complex with controllable activity and a preparation method and application thereof, which is formed by coordination of vinyl siloxane, modified ligand and chloroplatinic acid; the modified ligand is prepared by reaction of maleic anhydride, allylamine and hydroxymethyl dimethyl phosphite. The application introduces amide groups and phosphite groups into the molecular chain of maleic anhydride, uses the groups as coordination compounds to coordinate with vinyl siloxane and platinum, and can improve the normal-temperature storage stability of the platinum catalyst while still keeping high catalytic activity of the platinum catalyst on the hydrosilylation reaction; when the platinum complex is used for catalyzing preparation of addition-type liquid silicone rubber, no inhibitor needs to be added, and the silicone rubber has good mechanical properties.

The invention discloses a preparation method of a platinum-based hydrogen evolution catalyst with a nanoscale high-curvature tip, the platinum-based hydrogen evolution catalyst takes a nickel net as a substrate, the nickel net is firstly placed in ethylene glycol, metal salt deposition is carried out under a water bath condition, then chloroplatinic acid solution treatment is carried out, and finally cleaning and drying are carried out to prepare the platinum-based hydrogen evolution catalyst. The preparation method is simple, the process is easy to control, the prepared catalyst is of a three-dimensional multi-stage dendritic structure with tips, a large number of nanoscale tips on the dendritic structure can effectively enrich reactant active water molecules and have a repulsive effect on products, and the electrochemical kinetics performance is greatly improved. The catalyst has excellent water electrolysis hydrogen evolution performance and good stability, and in 6M potassium hydroxide, only 94 mV overpotential is needed to reach the stable current density of 500 mA. Cm <-2 >.

The application provides a method for preparing chloroplatinic acid based on waste platinum catalyst, comprising the following steps: pretreating the waste platinum catalyst to obtain crude metal platinum; dissolving the crude metal platinum in aqua regia to obtain a mixed solution; adjusting the pH of the mixed solution to 2.0-3.0, adding a first batch of reducing agent and dispersant, and reacting at 70-80 DEG C for 8-20 min to perform the first step reduction; adjusting the pH to 3.0-4.0, adding a second batch of reducing agent and dispersant, and continuing to react at 70-80 DEG C for 8-20 min to perform the second step reduction, so as to obtain a nano platinum system; separating to obtain monodisperse nano platinum; dissolving the monodisperse nano platinum in a hydrochloric acid-hydrogen peroxide system, the molar ratio of hydrochloric acid to hydrogen peroxide being 4:1-6:1, the dissolving temperature being 130-140 DEG C, and the dissolving time being 20-30 min, so as to obtain a chloroplatinic acid solution; and evaporating and crystallizing the chloroplatinic acid solution to obtain chloroplatinic acid crystals.

The invention relates to the technical field of electrolytic water platinum-based catalysts, in particular to a preparation method of an electrolytic water platinum-based catalyst, which comprises the following steps: S101, carrier pretreatment: carrying out acid treatment on a carbon carrier to obtain a defect-rich carbon carrier; s102, reacting: mixing an alkali solution, a chloroplatinic acid solution and the treated carbon carrier slurry in proportion, and reacting to obtain a mixed solution of a platinum-carbon catalyst and alcohol; and S103, filtering and drying: filtering the mixed solution of the platinum-carbon catalyst and the alcohol, and drying to obtain the dried platinum-carbon catalyst. The platinum-carbon catalyst prepared by the method has relatively high electrochemical activity, relatively good dispersity and relatively high metal utilization rate.

The invention relates to the technical field of preparation of alloy electrocatalysts, in particular to a method for preparing an alloy electrocatalyst by a rotary microwave-assisted method, which comprises the following steps: stirring and mixing carbon powder, cobalt chloride, deionized water and absolute ethyl alcohol, adding ammonia water, ultrasonically dispersing, filtering and collecting a filter cake, and drying to obtain the alloy electrocatalyst. Drying, heating, introducing hydrogen, carrying out heat preservation treatment, and collecting to obtain a precursor; taking the precursor, adding ethylene glycol, a sodium hydroxide solution, chloroplatinic acid and deionized water, carrying out ultrasonic-assisted treatment, collecting to obtain a mixed solution, placing the mixed solution in a sealed reaction device, and carrying out rotary microwave treatment; and carrying out pressure treatment, filtering, taking a filter cake, drying, heating, carrying out heat preservation and annealing treatment, collecting an annealed material, carrying out acid pickling treatment, and drying. The synergistic effect of the rotating microwaves ensures that the materials are uniformly heated, the particle aggregation phenomenon is reduced, a foundation is laid for the high activity and durability of the catalyst, and the method is more suitable for industrial large-scale production.

The invention belongs to the technical field of oil-based super lubrication, and particularly relates to a construction method of super-lubrication low-viscosity polar polyether modified silicone oil. The preparation method comprises the following steps: reacting allyl polyether with hydrogen-containing silicone oil according to a mass ratio of (70-80): 1 under the catalytic condition of chloroplatinic acid to obtain low-viscosity polar polyether modified silicone oil, and mixing 0.5 wt.%-1.5 wt.% of a polar additive, 0.1 wt.%-0.5 wt.% of surface functionalized nanoparticles and 97.5 wt.%-99.4 wt.% of the low-viscosity polar polyether modified silicone oil according to mass percent to obtain the compound lubricating oil. Performing ultrasonic treatment on the composite lubricating oil, and standing to obtain the super-lubricating low-viscosity polar polyether modified silicone oil. The polar additive molecules and the small-size and easy-to-disperse functional nanoparticles are compounded at the same time, so that the interaction between a lubricating film and a friction surface is remarkably enhanced in a cross-scale manner, and a friction pair motion interface is promoted to form a friction composite film with high bearing and low shearing characteristics; and stable ultralow friction and abrasion under the working conditions of wide rotating speed and wide load are achieved, and theoretical and technical supports are provided for engineering application of the oil-based super-lubrication technology.

The invention relates to the field of catalysts, and discloses a preparation method of a metal-loaded hierarchical porous amorphous nanoflower catalyst, which comprises the following steps: S1, dissolving ammonium molybdate tetrahydrate in a mixed solution for reaction, cooling to room temperature, washing and drying to obtain a product I; s2, adding the product I into a mixed solution for ultrasonic dispersion, then adding ammonium molybdate tetrahydrate, sequentially adding a tris (hydroxymethyl) aminomethane solution and a dopamine hydrochloride solution under vigorous stirring, then rapidly dropwise adding ammonia water, continuously stirring for reaction, and then performing centrifugal separation, washing and drying to obtain a product II; s3, taking the product II, adding ketjen black, grinding, heating to 800 DEG C in an N2 atmosphere, preserving heat at a constant temperature, and naturally cooling to obtain a product III; and S4, dissolving the product III in ethylene glycol for ultrasonic treatment, dissolving chloroplatinic acid in deionized water, transferring into ethylene glycol, slightly stirring, transferring into a reaction kettle for reaction, cooling to room temperature, taking out a product IV, washing and drying to obtain the catalyst. The catalyst provided by the invention has abundant microporous and mesoporous structures, and accelerates electron and proton transmission.

The application discloses a precious metal embedded porous carbon coated honeycomb ceramic monolithic catalyst and application thereof. The liquid phenolic resin polymer containing chloroplatinic acid is uniformly coated on the surface of the cordierite honeycomb ceramic through impregnation treatment; in an oxygen-nitrogen mixed atmosphere, one-stage solidification makes the liquid phenolic resin polymer containing chloroplatinic acid coated on the surface of the cordierite honeycomb ceramic completely solidified; two-stage calcination makes oxygen react with chloroplatinic acid, so that the chloroplatinic acid is decomposed, and the negative influence of chloride ions on the catalyst is eliminated; in an inert gas argon atmosphere, carbonization makes the phenolic resin polymer carbonize under high-temperature conditions to form porous carbon, and meanwhile, platinum ions are reduced to platinum single elements and embedded by the porous carbon, so that the precious metal (platinum, iridium) embedded porous carbon coated honeycomb ceramic monolithic catalyst is finally prepared.

The invention belongs to the field of aviation composite material manufacturing, and particularly relates to a preparation method of a benzocyclobutene modified cyanate ester composite material. Common high-temperature-resistant resin cannot have the characteristics of low dielectric, low loss, high temperature resistance and thermal oxidative aging resistance at the same time. The preparation method comprises the following steps: adding chloroplatinic acid with the mass fraction of 1%-5% into a benzocyclobutene monomer, and carrying out prepolymerization to obtain a benzocyclobutene prepolymer with the viscosity of 500-1000 mpas; the preparation method comprises the following steps: carrying out copolymerization on a benzocyclobutene prepolymer and cyanate ester according to a molar ratio of (1: 9)-(1: 1) to obtain a benzocyclobutene modified cyanate ester copolymer with the viscosity of 5000mpas-20000mpas; coating the release paper with the modified cyanate ester copolymer by using a hot melting method prepreg machine, wherein the coating temperature is 50-100 DEG C; then the benzocyclobutene modified phenolic aldehyde type cyanate ester prepreg is obtained through compounding with a fiber fabric, the compounding temperature is 50-100 DEG C, and the glue content of the prepreg is 33%-43%; and laminating and curing a certain number of layers of prepreg according to the thickness. The high temperature resistance and thermo-oxidative aging resistance of the cyanate ester resin can be improved, and the characteristics of low dielectric constant and low loss of the cyanate ester resin are maintained. The requirements of the high-temperature-resistant thermo-oxidative-aging-resistant wave-transparent resin-based composite material for the radome are met.

The invention discloses gas stove battery coated paper and a preparation method thereof, and relates to the technical field of coated paper. When the gas stove battery pulp layer paper is prepared, a double H-pyrazole methylamine ligand and 1-vinyl-1, 1, 3, 3-tetramethyldisiloxane are subjected to graft copolymerization on starch, and modified starch is prepared; the preparation method comprises the following steps: carrying out reaction on polyvinyl alcohol and 3-butylene phosphonic acid monomethyl ester to prepare modified polyvinyl alcohol; the triaryl s-triazine microspheres and 3-sulfydryl-N, N, N-trimethylpropane-1-ammonium chloride are subjected to a reaction, and functional triaryl s-triazine microspheres are prepared; preparing composite slurry from modified polyvinyl alcohol, modified starch, polyacrylamide, functional triaryl-s-triazine microspheres and chloroplatinic acid; and coating base paper with the composite slurry, drying, slitting and rewinding to obtain the gas stove battery slurry layer paper. The prepared gas stove battery pulp layer paper has excellent high temperature resistance, leakage prevention, flame retardance and mechanical strength.

The invention belongs to the technical field of biomedical materials. The invention provides a composite nano preparation for treating diabetic ulcer and promoting wound healing and a preparation method thereof. The preparation method comprises the following steps: mixing tetra (4-carboxyl phenyl) porphyrin and FeCl3. 6H2O for reaction, then adding a mixed solution composed of benzoic acid and 3, 5-dicarboxyphenylboronic acid for reaction, and then performing centrifugal drying; dispersing in water, adding a chloroplatinic acid solution, stirring, adding a sodium borohydride solution, continuously stirring, and centrifugally drying; stirring with a mixture of curcumin, flavonoid glycoside and astragaloside in ethanol, and carrying out centrifugal drying; and finally, stirring with glucose oxidase in water, and centrifugally drying. The composite nano preparation provided by the invention has an excellent antibacterial effect on multi-drug-resistant bacteria, can effectively destroy a biological membrane, can well treat diabetic ulcer and promote wound healing, and has a relatively good application prospect.

The application discloses a wear-resistant EVA material and a preparation method thereof, and relates to the technical field of polymer materials. In the preparation of the wear-resistant EVA material, modified nano cellulose is prepared by reacting nano cellulose and a triazole type ultraviolet absorber; modified silicon dioxide is prepared by sequentially reacting silicon dioxide with 4-anilinoethyl triethoxysilane and 4-vinyl aniline; modified ethylene-vinyl acetate copolymer is prepared by sequentially reacting ethylene-vinyl acetate copolymer with allyl phosphine dichloride and eugenol; the modified ethylene-vinyl acetate copolymer, the modified nano cellulose, the modified silicon dioxide, hydrogen-containing silicone oil and chloroplatinic acid are melt-mixed to prepare the wear-resistant EVA material by compression molding. The wear-resistant EVA material prepared by the application has excellent wear resistance, flame retardation and anti-aging performance.

This invention belongs to the field of biosensing technology, specifically relating to a modified carbon fiber electrode for detecting dopamine, its preparation method, and its application. The modified carbon fiber electrode comprises a carbon fiber electrode onto which gold-platinum bimetallic nanoparticles and polydopamine are sequentially modified. The preparation method specifically includes: firstly, modifying the surface of activated carbon fiber filaments with chloroauric acid and sodium citrate to obtain Au@CF; then, modifying the Au@CF surface with ascorbic acid and chloroplatinic acid to obtain platinum nanoparticles, obtaining Au / Pt@CF; finally, immersing the Au / Pt@CF in a dopamine solution to coat the Au / Pt@CF surface with polydopamine, obtaining PDA@Au / Pt@CF. This electrode has advantages such as high sensitivity, low detection limit, strong anti-interference ability, good biocompatibility, and high mechanical stability, making it suitable for dynamic monitoring of dopamine in the living brain.

The application relates to a preparation method of a Pt single-atom nanoscale enzyme and application of the Pt single-atom nanoscale enzyme in detection of cardiac troponin I, and the preparation method comprises the following steps: 1) ultrasonic dispersion of cobalt salt, selenium powder, chloroplatinic acid, urea and sodium chloride in an alcohol solvent, heating and stirring until the solvent is completely volatilized, grinding the solid mixture into a powder; 2) performing Joule heat treatment on the powder in a heating device under an air atmosphere, and performing washing and vacuum drying on the reactants to obtain the Pt single-atom nanoscale enzyme. In the one-step chemical reaction process, Se doping is introduced to construct oxygen vacancies, rapid heating and structure shaping are realized by combining the Joule heat treatment, a Pt single-atom catalyst loaded with Se-doped Co3O4 is obtained, the oxygen vacancies and the Se doping sites are used as anchor sites in cooperation, the Pt single atoms are effectively fixed, and the loading capacity and the dispersity of the Pt single atoms are improved. The obtained material shows excellent POD-like enzyme activity, can be used for constructing a high-sensitivity colorimetric immunoassay system, and realizes rapid and accurate detection of cTnI.