356results about How to "Few preparation steps" patented technology

The invention discloses an eggshell type nickel-based catalyst and a preparation method and application thereof, belonging to the technical field of nickel-based catalysts and aiming at developing the eggshell type nickel-based catalyst for meeting the demand. The research shows that the eggshell type nickel-based catalyst can be prepared by dissolving nickel salt into ammonia water solution, loading the mixed solution on a catalyst carrier by adopting a spraying or immersing mode, drying, roasting and reducing. The active component of nickel is mostly centralized in an area from the surface of the carrier to the part of 0.7mm below the surface and can remarkably improve the conversion rate and the selectivity of the catalyst. The invention can be applied to the technical fields of hydrogen addition and trace amount of carbon monoxide removal from hydrogen and the like.

The invention discloses a metal support half-cell of a solid oxide fuel cell and a preparation method thereof. The half-cell comprises a porous metal supporting layer thick membrane, a porous cermet gradient transition layer film, a porous anode layer and a compact electrolyte layer film from down to up. The porous gradient transition layer composed of a mixed oxide and a oxide with a fluorite structuring can avoid the direct contact of the porous metal supporting layer and the porous anode layer, and the mutual diffusion of Fe/Cr elements in the metal supporting layer and Ni element in the porous anode layer can be reduced under high temperature sintering condition. The mixed oxide is reduced to an alloy under the work condition of the cell; a high anode active material is formed at a side interface of the anode, a high conductivity composite material which takes the alloy as a main phase is formed on the side interface of a metal support body, so that higher conductivity is presented, ohmic resistance is reduced, electrocatalytic activity is not reduced, long-term stability for operation of the cell can be ensured, and good combination of the porous metal supporting layer and the porous anode layer can be simultaneously realized.

Chemical polymerization procedures initiated by, and proceeding from, a biomolecule, particularly a protein, for the formation of biomolecule-polymer conjugates, particularly protein-polymer conjugates, which have therapeutic uses, are intermediates for forming other materials or are usable in diagnostic sensors are disclosed. Polymerization can be initiated by a protein in the absence of additional initiation agents to form the protein-polymer conjugate. Alternatively, polymerization is initiated in the presence of an additional initiation agent that does not interact with the protein. Amino acids existing in the protein can serve as the sites for initiation of the polymerization or the protein can be modified to contain site(s) for initiation or protein with active sites can be prepared by recombinant methods, chemical ligation, solid-phase synthesis, or other techniques to generate site(s) for initiation.

The invention relates to an efficient electrode wire for precision mould cutting. The efficient electrode wire comprises a core material and a shell layer wrapping the surface of the core material, the core material is made of yellow copper from the processes of smelting, casting, stretching and annealing, the shell layer is a discontinuous shell layer formed by heating, continuously drawing and continuously annealing a zinc metal plating layer plated on the yellow copper core material, and the discontinuous shell layer comprises shell particles which radially cover 40-90% of the surface of the core material and are distributed at intervals along an axial direction of the surface of the core material. The invention further relates to a preparation method of the electrode wire. The preparation method is simple in production technology, strong in operability, less in preparation steps, simple in production equipment and easy to prepare satisfactory products and realize large-scale and automated production. The efficient electrode wire is strong in universality and is particularly suitable for precision mould cutting.

The invention discloses a nitrogen-doped carbon-coated molybdenum selenide/graphene core-shell array sandwich structure composite material, a preparation method and application thereof. The method includes: dissolving selenium powder in hydrazine hydrate to form a solution A; dissolving a sodium molybdate dehydrate solution in water to form a solution B; mixing the solutions to form a reaction solution, placing a vertical grapheme collector electrode material growing on a carbon cloth in the reaction solution to carry out hydrothermal reaction, and then conducting washing and drying to obtain a VG-MoSe2 core-shell array structure; dissolving dopamine hydrochloride in water, then soaking the VG-MoSe2 core-shell array structure in the dopamine hydrochloride aqueous solution, carrying out water bath polymerization, and performing washing drying; and carbonizing the dopamine polymerized core-shell array structure under high temperature condition in protective atmosphere, thus obtaining the nitrogen-doped carbon-coated molybdenum selenide/graphene core-shell array sandwich structure composite material. When used as a sodium ion negative electrode material, the constructed composite material has high reversible charge-discharge capacity, long cycle life and excellent rate performance.

The invention discloses a touch display panel, a preparation method thereof and a touch display device. The preparation method of the touch display panel comprises the following steps: providing a first substrate and a second substrate; coating an electrically conductive first glue material on the first substrate and coating an insulating second glue material on the second substrate; or coating the insulating second glue material on the first substrate and coating the electrically conductive first glue material on the second substrate, wherein the second glue material is frame-shaped and the projection of the first glue material on the first substrate is located outside the projection range of the second glue material on the first substrate; aligning and fitting the first substrate and the second substrate to form the touch display panel.

The invention discloses a preparation method of MoO3 @ mSiO2 microspheres, belonging to the technical field of nano material preparation. The preparation method comprises the following steps: through taking hexadecyl trimethyl ammonium phosphomolybdate as a core, coating the core with a layer of SiO2 by using a sol gel method, and then calcining the obtained product so as to obtain a core-shell hollow structured MoO3 @ mSiO2 microsphere. The MoO3 @ mSiO2 microsphere is good in dispersity, has a particle size of 200-900 nm and is of a hollow core-shell structure, the core is MoO3, and a shell is porous SiO2. The microsphere has a good catalytic effect on an esterification reaction between acetic acid and butanol for synthesizing butyl acetate; and under the reaction conditions that the reaction temperature is 150 DEG C, the molar ratio of acetic acid to butanol is 1:5, the application amount of a catalyst accounts for 36% of the mass of the acetic acid and the reaction time is 3h, the esterification rate of the acetic acid can reach 93.8%.

The invention belongs to the technical field of sensors, and particularly relates to a novel ammonia sensor and a preparation technology thereof. The novel ammonia sensor comprises a gas sensitive material and a substrate, wherein the gas sensitive material uniformly coats the surface of the substrate uniformly, and comprises the component of reducing graphene which is wrapped with a cobaltosic oxide composite nano material; the coating thickness of the gas sensitive material is 1micron-100microns. The ammonia sensor is relatively high in responsiveness of an ammonia gas, and meanwhile has the advantages of relatively good selectivity, flexibility and stability and relatively low operation temperature.

The invention discloses a photoelectrochemical adaptor sensor as well as a preparation method and application thereof. The photoelectrochemical adaptor sensor comprises a conductive glass electrode, wherein the reacting end surface of the conductive glass electrode is modified with a composite membrane consisting of phosphorus hybridization graphite phase carbon nitride nanosheets loading gold nanoparticles; and a specific adaptor probe is self-assembled on the surface of the membrane. The preparation method of the photoelectrochemical adaptor sensor comprises the following step: modifying thephosphorus hybridization graphite phase carbon nitride nanosheets loading the gold nanoparticles and the specific adaptor probe on the reacting end surface of the conductive glass electrode. The sensor disclosed by the invention has the advantages of high stability, long service life, high anti-jamming capability, wide detection range, low detection limit and the like. The preparation method of the photoelectrochemical adaptor sensor has the advantages of simple technology, convenient operation, safety, low cost, no pollution, high production efficiency and the like. The sensor disclosed by the invention can be widely applied to detecting pollutants (such as antibiotics) in mediums such as a water body and a living body and has the advantages of high utilization rate, wide application range, high application value and the like.

The invention provides a method for preparing magnesium lithium alloy cerium salt and molybdate-phosphate-zirconium fluoride conversion coating, which comprises: subjecting the magnesium lithium alloy to degreasing, pickling and activating; performing conversion by cerium salt for 10 to 15 minutes in cerium salt conversion solution under conditions of a pH value of 3 to 4 and a temperature of 40 DEG C, and forming a layer of rare earth conversion coating on the surface of the magnesium lithium alloy; and immersing in molybdate-phosphate-zirconium fluoride conversion solution to perform conversion for 12 to 15 minutes under conditions of a pH value of 3.7 to 3.8 and a temperature of 50 to 55 DEG C. The method has better anticorrosion effect and is environment friendly; the bonding force between the conversion coating and the substrate is high; the color of the conversion film is uniform; the anticorrosion performance is high; and the obtained molybdate-phosphate-zirconium fluoride conversion solution has high recycling value and long service life and can be better reduce production and application cost.

The invention discloses a preparation method of a carfilzomib intermediate (alpha S)-[[2-(4-morpholinyl)acetamido]phenylbutyryl]-L-leucyl-L-phenylalanine (I), which comprises the following steps: with 2-(4-morpholinyl)acetic acid (V), 4-phenyl homophenylalanine ester (VI), L-leucine ester (VIII) and L-phenylalanine ester (X) as raw materials, performing an amidation reaction and a hydrolysis reaction to generate (alpha S)-[[2-(4-morpholinyl)acetamido]phenylbutyryl]-L-leucyl-L-phenylalanine (I). Compared with the prior art, the preparation method has the advantages of simple process, easily available raw materials and few side reactions, adapts to industrial production and promotes the economic and technological development of the raw medicine.

The invention discloses a method for preparing phase-changing fiber having a core-shell beaded structure. The method includes: dissolving phenolic resin and polymer component in an organic solvent to form a resin solution, and putting the resin solution in an injector connected to a spinning head skin layer; putting a lower temperature phase changing material in an injector connected to a spinning head core layer; acquiring phase-changing nascent fiber on a rotation or flat plate receiving device; and putting the obtained phase-changing nascent fiber in a curing solution to be cured, and washing and drying the cured phase-changing nascent fiber to obtain the phase-changing fiber having the core-shell beaded structure. The beaded phase-changing fiber having a special structure is prepared through a single-step coaxial electrostatic spinning method, and the preparation steps of the phase-changing fiber are reduced; the connected core-shell structure is obtained through the coaxial electrostatic spinning method, secondary load can be reduced, the energy density of the phase-changing fiber is improved, and the efficacy of the phase-changing fiber can be improved; and skin and core beads prepared by the electrostatic spinning method can coat the phase-changing material well, and the coating performance of the phase-changing fiber can be improved.

The invention discloses a preparing method of a carbon fiber/polyaniline wave-absorbing electromagnetic shielding composite. The preparing method includes the following steps that 1, oiling agents and impurities on the surface of a fiber product are removed, and moisture on the surface is removed for use; 2, the carbon fibers obtained in the step 1 are taken and pasted on stainless steel foil with a conductive silver adhesive to serve as an anode, Cu foil serves as an cathode, an aqueous solution with aniline and a dopant mixed is selected as an electrolytic solution, a polyaniline film is electropolymerized on the surface of the carbon fibers through the electropolymerization method, and a carbon fiber/polyaniline composite is obtained; 3, the carbon fiber/polyaniline composite obtained in the step 2 is taken to serve as electromagnetic shielding bi-component functional filler, epoxy resin is selected as a resin matrix, and the carbon fiber/polyaniline wave-absorbing electromagnetic shielding composite is obtained through the extrusion forming technology. The carbon fiber/polyaniline composite prepared through the preparing method has the advantages of high electric conductivity of the carbon fibers, high electric conductivity of polyaniline and double-loss structure wave absorbing, and can be applied to the fields of electromagnetic shielding and the like.

The invention relates to a method for preparing nano aluminum oxide coated tungsten powder, belonging to the field of powder metallurgical preparation. The method solves the problems of being uneven in particle size, not reaching nanoscale, being easy to pollute, agglomeration of powder and the like in the current preparation of the nano aluminum oxide coated tungsten powder. The coated power is characterized in that nano aluminum oxide is coated on the surface of micron-sized tungsten powder, and the mol content of the aluminum oxide is 10-30%. The method for preparing the coated powder is characterized in that ammonium metatungstate powder and aluminium sulphate powder are dissolved in distilled water together, and then dispersed in liquid nitrogen for pre-freezing by using a nitrogen spray gun after being clarified; the pre-frozen mixture is placed into a freeze-dryer for vacuum drying, so that freeze-dried powder can be obtained; under hydrogen atmosphere, the freeze-dried powder is calcined and deacidized in a sectional form, and composite powder of the nano aluminum oxide coated tungsten powder can be obtained. The invention has the advantages of fewer steps in the preparation process, simple operation, cheap and easily obtained raw materials and needing not to add matrix phase particles in advance.

The invention relates to a foaming agent and a preparation method thereof, and belongs to the technical field of preparation of foamed aluminum and foamed aluminum alloy. The foaming agent has a composition ratio of 20-25% by weight of quicklime, 30-40% by weight of coke, 10-15% by weight of potassium carbonate, and the balance is calcium sulfate. The steps of preparing foamed aluminum and foamed aluminum alloy with the foaming agent mentioned in the present invention: (1) melting process: put the aluminum alloy ingot into the crucible, heat it to 680-720 ° C and keep the temperature until it melts; (2) increase Viscosity process and foaming process: Add 1.5~3% foaming agent to the aluminum melt and stir for 5 minutes at a stirring speed of 1500~2000rpm to increase the viscosity of the melt and distribute the foaming agent in the aluminum melt (3) Heat preservation process: After the foaming agent is mixed evenly, keep the temperature at 680-720°C for 5-10 minutes. (4) Cooling process: After the aluminum foam is formed, it is naturally cooled in the air or forced to water. The foaming agent of the invention has low cost, is economical and effective, and can replace TiH2 foaming agents.