21results about How to "Efficient preparation method" patented technology

This invention provides a steel material and a method for manufacturing the same, as well as a can and a method for manufacturing the same. The steel material of this invention has the following composition: by mass % C: 0.200% to 0.700%, Si: 0.05% to 1.00%, Mn: 20.0% to 40.0%, P: less than 0.030%, S: less than 0.0050%, Al: less than 5.00%, Cr: less than 7.0%, N: less than 0.0500%, O: less than 0.0050%, Ti: less than 0.005%, Nb: less than 0.005%, and contains one or more elements selected from Ca: less than 0.0100%, Mg: less than 0.0100%, and REM: less than 0.0200%, with the remainder consisting of iron and unavoidable impurities; the microstructure is such that the maximum crystal grain size at a position 1 mm below the surface of the steel is less than 200 μm.

The present invention addresses the problem of providing a method for producing a propionic acid derivative with excellent productivity. This problem is solved by a method for producing a compound represented by formula (1), said method comprising: a step A in which a compound represented by formula (2) and a compound represented by formula (3) M (R1) n (in the formula, M is a cation, and n is an integer corresponding to the valence of M) are reacted with each other; the compound shown in the formula (4): R6-X-H reacts with the compound shown in the formula (4): R6-X-H; and a step B in which a compound represented by formula (5): MFn is separated by filtration from the mixture obtained by the reaction. (In the formula, R1 is a halogen atom or the like, R2 and R3 are each independently a hydrogen atom, a halogen atom, an organic group or the like, X is an oxygen atom or a sulfur atom, R4 and R5 are each independently a hydrogen atom, a halogen atom, a hydrocarbon group which may have one or more substituents or the like, and R6 is a hydrocarbon group which may have one or more substituents. )

A method for one-step preparation of methylamine by hydrogenation amination of carbon dioxide, belonging to the field of catalysis. In a fixed-bed reactor, carbon dioxide, hydrogen, and ammonia are reacted. The catalyst comprises a microporous or mesoporous silica support, and the active component includes indium, zirconium, and at least one metal promoter selected from nickel, copper, palladium, rhodium, and platinum; the In 3d... 5 / 2 The binding energy is 444.0~444.7 eV, which is more than 0.2 eV lower than that of pure indium oxide; the single-pass conversion rate of carbon dioxide is not less than 50%, the total selectivity of methylamine is not less than 80%, and the selectivity of the byproduct carbon monoxide is not higher than 20%. This invention constructs a unique In-Zr-M active center, with In, Zr, and M uniformly co-distributed at the nanoscale. By adjusting the NH3 / CO2 ratio, the ratio of dimethylamine to trimethylamine can be controlled. The catalyst of this invention exhibits excellent performance and good stability, and has broad application prospects in the fields of carbon dioxide resource utilization and green synthesis of methylamine.

Examples relate to thin films, transparent laminates, applications as cover films, and multilayer electronic devices incorporating the thin film, which possess excellent optical properties such as refractive index, haze, and yellowness, as well as excellent mechanical properties. The thin film includes an elastic layer with a refractive index of 1.48 to 1.58 and a low-temperature damage index (the difference between tensile modulus and tensile strength at a specific temperature), wherein the low-temperature damage index of the elastic layer at -40°C is below 1300 MPa.

The invention discloses an Ag monatomic modified In2O3 single crystal film prepared based on pulse voltage discharge, a method thereof and a gas sensitive sensor, and the method comprises the following steps: 1) placing a substrate in a vacuum cavity of magnetron sputtering equipment, taking an indium oxide target as an In source, and growing on the substrate through a magnetron sputtering technology to obtain an indium oxide single crystal film; the substrate is yttrium oxide stabilized zirconia (YSZ); (2) placing the indium oxide single crystal thin film obtained in the step (1) on a vacuum chamber sample table which is internally provided with a pulse voltage discharge electrode and an Ag target material, evaporating Ag particles based on a pulse voltage discharge process, and depositing the Ag particles on the surface of the indium oxide single crystal thin film material to form dispersed clusters; and annealing to obtain the Ag single atom modified In2O3 single crystal thin film. The synthesis of a sensitive material with a high atom utilization rate and a stable structure is realized, and an advanced NO2 gas sensing device with high sensitivity and high selectivity is obtained.

The invention relates to a sulfydryl silicon dioxide coated magnetic biochar material, a preparation method thereof and an application of the sulfydryl silicon dioxide coated magnetic biochar material in adsorbing and removing cadmium ions, the material takes biochar prepared from aquaculture byproducts as a substrate, and Fe3O4 magnetic particles, a silicon dioxide coating layer and a sulfydryl functional group are loaded in sequence. The method comprises the following steps: firstly, synthesizing magnetic biochar containing SiO2-coated Fe3O4 particles on the surface by a coprecipitation method under an alkaline condition, and then carrying out sulfydryl modification on the magnetic biochar by a grafting method to finally prepare the sulfydryl-modified silicon dioxide-coated magnetic biochar adsorbent. The adsorbent prepared by the method has the characteristics of high specific surface area, abundant pore structures, a large number of sulfydryl active groups and the like, shows high adsorption capacity and good selectivity on cadmium ions in water, and can be conveniently separated and recycled through magnetism. The material can also be used for adsorbing lead, copper, zinc, chromium and other heavy metal ions, the preparation process is simple, and the material has wide application prospects in the field of heavy metal wastewater treatment.

The invention relates to the technical field of novel biological materials, and particularly discloses an active oxygen and lactic acid dual-driven chemotactic nano motor and a preparation method thereof. Comprising lactate oxidase and selenium nanoparticles, the selenium nano-particles are formed by ascorbic acid and sodium selenite through a chemical reduction method, and the surfaces of the selenium nano-particles are modified with polysaccharide for stabilizing the selenium nano-particles; the lactate oxidase is loaded on the selenium nano-particles to form the nano-motor. Lactic acid is specifically consumed by loading lactic acid oxidase on the surface of the selenium nano-motor, due to high selectivity, the nano-motor can perform directional chemotactic movement towards a lactic acid high expression site, and the excellent oxidation resistance of selenium nano-particles can remove active oxygen and avoid oxidative stress damage, so that the lactic acid and the active oxygen are consumed at the same time.

The main objective of this invention is to provide an efficient method for manufacturing a polished glass plate for display. This method is characterized in that, if any glass plate in the third glass plate group of any polishing machine in the first system breaks during polishing, the broken glass plate is not recycled. Then, the other glass plates in the third glass plate group that have completed polishing normally, and the glass plates in the first glass plate group to be polished from this point onward, are simultaneously transported with the same amount of movement. Next, the glass plate to be polished by the polishing machine that malfunctioned is not supplied to the first system, but is transported downstream together with the other glass plates in the third glass plate group that have completed polishing normally. Finally, the glass plate to be polished by the polishing machine that malfunctioned is determined to be insufficiently polished through an inspection process and is then re-polished.

The application discloses a polycrystalline cubic boron nitride composite sheet and a preparation method thereof, and relates to the technical field of superhard materials. The preparation method of the polycrystalline cubic boron nitride composite sheet comprises the following steps: pretreating cubic boron nitride to obtain cubic boron nitride coated with silicide; the silicide comprises at least one of silicon carbide, silicon nitride, silicon boride and silicon carbonitride; mixing the cubic boron nitride coated with silicide and a binder to obtain a mixture; and performing sintering treatment on the mixture and a hard alloy base body to obtain the polycrystalline cubic boron nitride composite sheet. The preparation method is simple and efficient, and the polycrystalline cubic boron nitride composite sheet prepared by the method has the characteristics of good corrosion resistance, good oxidation wear resistance, good diffusion wear resistance, good chemical wear resistance, good heat resistance and long service life.

The application discloses a vanadium pentoxide-based magnesium battery positive electrode material and a preparation method thereof. The application obtains flower-spherical vanadium pentoxide through a hydrothermal reaction of an ammonium metavanadate and a mixed solution of reactants and subsequent calcination; the method has high production efficiency, is convenient to produce, has short preparation time, is low in cost and has good repeatability. The flower-spherical vanadium pentoxide nanomaterial is used as a magnesium battery positive electrode material, more surface active sites can be exposed, ion transmission channels are increased, the problem of stacking and agglomeration of vanadium pentoxide nanosheets in a cycle process is solved, the exposed (001) crystal face reduces the interface side reaction of an electrode and an electrolyte surface, the storage capacity of vanadium pentoxide is greatly improved, the vanadium pentoxide has good cycle stability and is an excellent magnesium battery positive electrode material.

The application discloses a high-performance copper-aluminum interface eutectic composite material, which comprises an aluminum plate and copper plates, the aluminum plate is a base layer, the upper and lower copper plates are cover layers, and a eutectic layer is formed between the aluminum plate and the upper and lower copper plates; the aluminum plate comprises the following components in percentage by weight: Si: 0.04-0.25%, Fe: 0.1-0.3%, Ti: less than 0.15%, and the rest is Al and inevitable impurities; the copper plate comprises the following components in percentage by weight: Pb: less than 0.03%, Fe: less than 0.1%, and the rest is Cu and inevitable impurities; and a preparation method of the high-performance copper-aluminum interface eutectic composite material is provided. The application has higher shearing strength and peeling strength; metallurgical bonding can be realized between the composite metals, a eutectic layer is formed, and the bonding strength of the material can be met; and compared with the existing composite material production mode, the preparation method is simpler, more economical and more efficient.

This invention discloses a novel electropolymerizable ionic liquid with an X-Y structure, wherein X includes at least one of aniline, pyrrole, and thiophene, and Y includes at least one of imidazole and pyridine. This ionic liquid allows for the electrochemical polymerization of monomer materials on the cathode surface via an in-situ formation process, achieving electrochemical in-situ coating of the cathode material. This effectively transports lithium ions while avoiding the impact of the high oxidation activity of high-voltage active materials on electrolyte stability, thereby preventing battery capacity loss.

The application provides a Stropharia rugosannulata enzymatic powder extruded noodle and a preparation method thereof, and belongs to the technical field of food processing. The Stropharia rugosannulata enzymatic powder extruded noodle comprises the following components in parts by weight: 90-110 parts of cereal powder, 2-10 parts of semi-solid enzymatic Stropharia rugosannulata mushroom powder and 0.2-0.8 parts of salt. The Stropharia rugosannulata is prepared into Stropharia rugosannulata enzymatic powder by using a semi-solid enzymatic technology, so that the technical problems of poor solubility, low usage and poor noodle forming of mushroom powder are overcome, the Stropharia rugosannulata enzymatic powder extruded noodle with improved nutritional value and functional activity, reduced salt usage, smooth taste, unique mushroom aroma and salty taste is prepared. The preparation method of the Stropharia rugosannulata enzymatic powder extruded noodle is simple and efficient, and is suitable for large-scale production.

This invention relates to the fields of genetic engineering and enzyme engineering, and particularly to glucose dehydrogenase mutants, their preparation methods, and their use in the synthesis of NMNH. The glucose dehydrogenase mutants are obtained by mutation at one or more sites at positions 39, 51, 75, 93, 157, 195, 208, or 236 of the amino acid sequence of the wild-type glucose dehydrogenase. The glucose dehydrogenase mutants of this invention exhibit high catalytic activity and can efficiently catalyze the synthesis of NMNH from NMN. Using the constructed glucose dehydrogenase mutants to catalyze the synthesis of NMNH from NMN, the yield of NMNH can reach 41.2 g / L.

Provided are: a production method for a liquid containing a carboxyl group-containing resin, which is excellent in stability over time; and a stabilization method for a carboxyl group-containing resin. The production method for a liquid containing a carboxyl group-containing resin according to the present invention is characterized by comprising: a process A of synthesizing a first liquid containing a carboxyl group-containing resin by causing a reaction intermediate obtained by reacting an epoxy compound (a) with an unsaturated monobasic acid (b) to react with a polybasic acid dianhydride (c) and a polybasic acid monanhydride (d) in an organic solvent; and a process B of obtaining a second liquid containing a carboxyl group-containing resin by adding water to the aforementioned first liquid containing a carboxyl group-containing resin.

Provided is a method for producing an electrode for an all-solid-state battery, with which it is possible to satisfactorily produce an electrode for an all-solid-state battery. A method for manufacturing an electrode for an all-solid-state battery according to one embodiment of the present invention comprises: a pressing step; a transfer printing process; and a peeling step. In the pressing step, active material layers are formed on the front surface and the back surface of the current collector, respectively, and pressing is performed. In the transfer step, the solid electrolyte layer disposed on the sheet is transferred onto the active material layers formed on both surfaces of the current collector. The peeling step peels the sheet from the solid electrolyte layer.

The degradable plastic packaging bag is prepared from the following raw materials in parts by mass: 20 to 40 parts of low-density polyethylene resin, 10 to 30 parts of high-density polyethylene resin, 50 to 100 parts of pretreated starch, 5 to 15 parts of dendritic polyamidoamine, 5 to 15 parts of starch, 1 to 10 parts of polyvinyl alcohol, 1 to 2 parts of formaldehyde, 1 to 3 parts of citric acid and 1 to 3 parts of calcium stearate. The pretreated starch is obtained by carrying out enzymolysis on starch through pullulanase and then reacting with a cationic etherifying agent. The invention discloses a preparation method of the degradable plastic packaging bag, which comprises the following steps: adding the pretreated starch and the dendritic polyamidoamine into the water, adding the starch and the polyvinyl alcohol, uniformly stirring, adding the formaldehyde in a stirring state, and performing ultrasonic dispersion to obtain the modified starch; and mixing the low-density polyethylene resin, the high-density polyethylene resin and the citric acid, adding the calcium stearate and the modified starch, continuously stirring, performing blow molding, and sequentially performing traction, printing and heat sealing to form a bag.

This invention discloses a star-shaped polyamino acid nanoparticle with long-cycle properties, its preparation method, and its applications, belonging to the field of biomedical technology. The nanoparticles of this invention have a star-shaped structure with a polyamide-amine dendritic macromolecule as the core and copolymerized amino acids as arms; the nanoparticles are first initiated by polyamide-amine as an initiator. N -Carboxylic acid ring anhydride and second N The nanoparticles are prepared by random copolymerization of anhydride monomers within a carboxylic acid ring in an organic solvent. The organic solvent is a mixture of a low-polarity haloalkane and a high-polarity amide or cyclic ether solvent in a volume ratio of 9:1. This preparation method is simple and efficient. This invention, by controlling the types of amino acids, the charge of the nanoparticles, and their topological structure, demonstrates that the star-shaped topology and glutamic acid / lysine side chains play a crucial role in achieving long-term cycling. These nanoparticles have broad application prospects in the preparation of therapeutic tumor drugs.

The application provides N-(3,5,6-trimethylpyrazine-2-methylene)-huperzine A and a synthetic method and application thereof. A structural formula is as follows: a preparation method thereof comprises the following steps: (1) carrying out bromination reaction on tetramethylpyrazine to obtain 2-bromomethyl-3,5,6-trimethylpyrazine; (2) carrying out condensation reaction on huperzine A and 2-bromomethyl-3,5,6-trimethylpyrazine to obtain N-(3,5,6-trimethylpyrazine-2-methylene)-huperzine A. The compound not only has acetylcholinesterase inhibition effect, but also can prevent brain nerve tissue aging and cell apoptosis by eliminating ROS and free radicals and resisting oxidative damage, so as to intervene in the development of Alzheimer's disease.

The application relates to the field of lithium ion battery negative electrode material preparation, and discloses a silicon-carbon composite material and a preparation method and application thereof. The composite material comprises graphite, nano-silicon, a nitrogen-containing carbon layer between the graphite and the nano-silicon, and a carbon coating layer wrapping the nano-silicon. The silicon-carbon composite material provided by the application has good charge-discharge cycle stability when applied to a lithium battery negative electrode material.

The present application relates to a kind of rare earth complex light stabilizer and its preparation method and use, the rare earth complex light stabilizer includes [Ce (triRNTB) 2]X3 And / or RE (BP) 3, the rare earth complex light stabilizer includes 40-100 parts by weight of [Ce (triRNTB) 2]X3 And 0-60 parts by weight of RE (BP) 3.The present application uses the rare earth complex as new functional additive is introduced into organic fluorescent dye light conversion system.By constructing "light conversion-stable" dual functional composite system, both can solve the light stability bottleneck of small molecule dye, also can realize light conversion efficiency compensation using the light-induced luminescence enhancement effect of complex.The strategy provides innovative material design ideas for developing long life, high stability blue light conversion film, and has important practical significance for promoting the technology upgrading of light conversion material.