2464results about How to "Short preparation time" patented technology

A separation column and a method of making the separation column are provided. The separation column includes a separation channel and fritless separation medium in the channel. The separation medium includes a porous matrix, and the porous matrix includes a metal organic polymer, such as a photopolymer. The separation medium can be used to separate a sample of analytes.

The invention relates to the field of release agents, in particular to a method for obtaining a release agent layer on a base plate and a composite material containing the base plate and the release agent layer. The method for obtaining the parting agent layer on the base plate comprises coating a release agent on the base plate, and drying to form the parting agent layer on the base plate. The method is characterized in that the release agent comprises water, alcohol, epoxy resin and Al2O3 powder, wherein relative to 100g of Al2O3 powder, the dosage of the water is 300-600mL, the dosage of the alcohol is 300-600mL, and the dosage of the epoxy resin is 5-15mL. The release agent can be online directly sprayed on the surface of a composite titanium board, and can be quickly cured to form a self-drying type coating to achieve a parting effect, so that in a 4-6h constant-temperature process at 800-1000 DEG C and a rolling process of a titanium steel composite board, adhesion and surface roughness increase phenomena of a titanium-titanium interface are avoided, and the yield and the production efficiency for titanium steel composite board processing are improved.

The invention discloses an efficient in-situ preparation method of a graphene reinforced copper-based composite material, and relates to a method for preparing a graphene reinforced copper-based composite material and the method can be used for solving the problems of poor uniform dispersion, poor structure integrity of grapheme and complex process in the existing preparation method of the graphene reinforced copper-based composite material. The efficient in-situ preparation method of the graphene reinforced copper-based composite material comprises the following steps: putting copper powder in a plasma reinforced chemical vapor deposition vacuum device, introducing hydrogen, preserving heat at high temperature, then introducing argon and carbon source gas, depositing, stopping introducing the carbon source gas after ending the deposition, and finally, cooling below the room temperature to obtain grapheme/copper composite powder, and then primarily pressing, sintering and secondarily pressing the grapheme/copper composite powder to obtain the graphene reinforced copper-based composite material. The method is an efficient in-situ preparation method of a graphene reinforced copper-based composite material.

The invention discloses an oily high-temperature resistant protective coating material. The oily high-temperature resistant protective coating material is obtained after a raw material mixture is uniformly mixed, wherein the raw material mixture contains an oxidation protecting agent and an oily film forming agent; the oxidation protecting agent contains Al powder and Fe powder which are in the weight ratio of 1: (0.01-0.1). The invention further discloses an application of the oily high-temperature resistant protective coating material in titanium ingot production and a titanium ingot production method. The oily high-temperature resistant protective coating material disclosed by the invention has the advantages that the condition that the surface of a titanium ingot is not subjected to oxidation cracking under the condition that the titanium ingot undergoes constant temperature for 8 hours at the high temperature of 1,000 DEG C can be guaranteed, the forming possibility of an oxygen dissolved layer can be greatly reduced, and the yield and production efficiency of a titanium material are increased; the construction environment is not affected; the preparation process is simple; a variety of coating manners, such as pneumatic spraying, vacuum spraying and brushing, can be adopted. The titanium ingot production method disclosed by the invention has good economic and social benefits and has relatively broad popularization and application prospects in titanium plate and titanium tube production industries.

The invention provides a preparation method of a polylactic acid/nano cellulose composite material. The composite material comprises the following components in percentage by weight: 55 to 99.8% of polylactic acid, 0.1 to 15% of nano cellulose, and 0.1 to 30% of polyethylene glycol. The method comprises the following steps of: preparing a 5 to 15% an aqueous solution of microcrystalline cellulose, dripping concentrated sulfuric acid until the concentration of sulfuric acid reaches 40 to 60%, stirring and reacting for 1 to 2hours, carrying out centrifugation, ultrasound treatment and adjusting pH value to be neutral to obtain a nano cellulose suspension; dissolving polyethylene glycol, mixing with the nano cellulose suspension, stirring for 1 to 3hours at the temperature of 90 DEG C and carrying out vacuum drying to obtain a polyethylene glycol/nano cellulose comixture; and carrying out melt blending on the polyethylene glycol/nano cellulose comixture and polylactic acid for 5 to 8minutes at the temperature of 120 to 170 DEG C to obtain the composite material. The method is convenient and simple to operate, short in the time of the preparation process and solves the problem of uniform dispersion of nano-cellulose in the polylactic acid.

The invention relates to a preparation method of inorganic/organic multi-drug controlled release composite nano fiber scaffold, which includes the steps of preparing drug loading nanoparticle with particle size of 5-500 nm, preparing mixed solution of high molecular polymer and drug, adding multiple drug loading nanoparticles into the polymer solution, ultrasonically stirring, and carrying out electrostatic spinning to obtain inorganic/organic multi-drug controlled release composite nano fiber scaffold with diameter of 50-800 nm. The preparation method provided by the invention has the advantages of mild reaction conditions, simple operation, and easy experimental apparatus, and is in favor or large-scale production; the obtained multi-drug controlled release composite nano fiber scaffold has good stability and good biocompatibility and biodegradability, and can be stored for a long period of time, and the degradation product is non-toxic. The inorganic/organic multi-drug controlled release composite nano fiber scaffold can be widely applied in the fields of tissue engineering, biomedical engineering, drug therapy and the like.

A method of preparing silica aero-gel powders having a short preparation time and stable preparation processes. In the method, the silica aerogel powders are generated by using a water glass solution, an inorganic acid, an organosilane compound and an organic solvent. The method includes dispersion-solution generating, gelating and solvent exchanging and drying. In the dispersion-solution generating, a dispersion solution is generated by dispersing the water glass solution and the organosilane compound in the organic solvent. In the gelating and solvent exchanging, silica hydrogel is generated by adding the inorganic acid to the dispersion solution and simultaneously performing gelating and solvent-exchanging. In the drying, the silica aerogel powders are generated by drying the silica hydro-gel.

The invention discloses a catalyst for converting alcohols and ethers into aromatic hydrocarbons, as well as a preparation method and a use method of the catalyst, and belongs to the technical field of chemical engineering. The preparation method comprises the steps as follows: at first, taking a template agent, kaolin, sodium hydroxide and water as raw materials for preparing a hydrogen type nanoscale ZSM-5 molecular sieve, and then directly preparing the catalyst; or based on the hydrogen type nanoscale ZSM-5 molecular sieve, preparing the two-component, three-component or four-component catalyst with metal and/or a structure enhancer and/or a stabilizing additive. The catalyst comprises the following components in percentage by mass: 30-100% of the needle-like nanoscale ZSM-5 molecular sieve, 0-10% of the metal, 0-50% of the structure enhancer and 0-10% of the stabilizing additive. The invention further provides a method for enabling the catalyst to be used for converting alcohols and ethers into aromatic hydrocarbons. The catalyst is small in particle size, high in catalytic efficiency and low in use cost; the preparation method is simple and efficient; and the use method is reasonable and efficient.

The invention relates to an alkali halide-doped perovskite light-emitting diode. The alkali halide-doped perovskite light-emitting diode comprises a substrate, a hole transmission layer, an active light-emitting layer, an electron transmission layer, an electrode modification layer and an electrode, wherein the thickness of the active light-emitting layer is 5-100 nanometers, the active light-emitting layer comprises perovskite and an alkali halide doped in the perovskite, the molecular formula of the perovskite is one or more of CsPbCl<x>Br<3-x>, CsPbBr<x>I<3-x>, MAPbCl<x>Br<3-x>, MAPbBr<x<I<3-x>, FAPbCl<x>Br<3-x> and FAPbBr<x>I<3-x>, x is equal to 0, 1, 2 or 3, and the alkali halide is one or more of LiCl, NaCl, KCl, RbCl, LiBr, NaBr, KBr, RbBr, LiI, NaI, KI and RbI. The invention also provides a fabrication method of the alkali halide-doped perovskite light-emitting diode. The fabrication method comprises the steps of forming the hole transmission layer or the electron transmissionlayer o the substrate; modifying an alkali halide-containing perovskite precursor solution used as the active light-emitting layer on the hole transmission layer of the electron transmission layer; sequentially forming the electron transmission layer, a negative electrode modification layer and a negative electrode on the active light-emitting layer or sequentially forming the hole transmission layer, a positive electrode modification layer and a positive electrode on the active light-emitting layer; and performing package.

The invention discloses an enzyme-free methyl parathion detection sensor, and preparation and application methods thereof. The sensor comprises a three-electrode system, wherein a graphene/carbon nanotube/chitosan deposition modified glassy carbon electrode is used as a working electrode, a platinum sheet is used as a counter electrode, and a calomel electrode is used as a reference electrode. In the detection process, by using the graphene/carbon nanotube/chitosan deposition modified glassy carbon electrode as the working electrode, the platinum sheet as the counter electrode and the calomel electrode as the reference electrode, an electrochemical work station is utilized to determine the content of methyl parathion. The enzyme-free methyl parathion detection sensor disclosed by the invention has the advantages of short preparation time and environment friendliness, is simple to operate, and can be recycled; and the low detection limit is 0.8ng/L. The invention also has the advantages of short sample detection time and simple treatment.

The present invention relates to a preparation method for diamond surface visualization, and is characterized in that the preparation method includes the following steps: firstly, the cleanness of the diamond surface; secondly, the preparation of the insulated layer of the diamond surface; thirdly, the preparation of the photosensitive resist pattern of the insulated layer surface; fourthly, the preparation of the insulated layer pattern of the diamond surface; fifthly, wiping off photosensitive resist remained on the surface of the diamond insulated layer; sixthly, the preparation of a metal folium used for sculpturing the diamond surface; seventhly, the diamond provided with the metal folium on the surface prepared in the sixth step is put in a vacuum chamber, and inlet working gas, a plasma body is produced by blazing the electric energy or the electromagnetic energy, under the temperature of 800 to 900 DEG C, the diamond is sculptured, thus the diamond with visualization surface can be obtained; eighthly, the diamond with visualization surface can be obtained by eliminating the metal folium remained on the diamond surface. The present invention has the advantages of prepared extensively, easy to operate, short time for preparation, and no obvious preferential mechanical erosion to the crystal boundary of the polycrystalline diamond.

The invention belongs to the technical field of carbide ceramics, and concretely relates to a high-entropy boron-containing carbide ultrahigh temperature ceramic powder and a preparation method thereof. The molecular formula of the ceramic powder is XCyBz, wherein X is at least two of Zr, Ti, Hf, V, Nb, Ta, Cr, Mo and W, y is equal to or more than 0.6 and less 1.0, z is more than 0 and equal to orless than 0.4, and y + z = 1. The ceramic powder has a single phase face-centered cubic structure. The preparation method comprises the following steps: carrying out ball-milling mixing on at least two metal powders and C powder, carrying out pressureless plasma sintering and crushing to obtain carbide powder, mixing the carbide powder with B2O3 powder and a carbon source, and then performing high temperature sintering and crushing to obtain the ceramic powder. The ceramic powder is a single-phase solid solution, has the face-centered cubic structure, and contains the boron element, so the ceramic powder integrates the high temperature resistance of carbides and the oxidation resistance of borides, and can be used to prepare an ablation and oxidation resistant high-entropy boron-containing carbide ultrahigh temperature ceramic block or composite material.

The invention discloses a preparation method for a polycarboxylic acid series comb-shaped surface active agent, which comprises the following steps of: mixing two comonomers, an initiator, a chain transfer agent and a solvent under the protection of nitrogen, heating to a reacting temperature for polymerization to obtain an intermediate polymer; adding a graft compound, a catalytic agent and a dissolvant into the intermediate polymer, carrying out graft reaction at graft temperature, decompressing and removing part of solvent in a reaction system after reaction, and then precipitating the product with a precipitator; dissolving filter cakes with the solvent; precipitating the dissolved solution with the precipitator again, dissolving repeatedly, precipitating again and then refining, and finally decompressing and drying the product to the constant weight. The preparation method has the advantages of reasonable technology, simple operation, low preparation cost, mild reacting conditions and good product quality.

A disclosed preparation method for small-size graphene comprises the steps: step 1, mixing a graphite powder raw material and a solvent to obtain a graphite mixed solution; step 2, putting the solution in a container, and fixedly arranging a homogenizing head of a stator-rotor apparatus of a stator-rotor mixer below the liquid level; step 3, starting a cooling system and the stator-rotor mixer for processing; and step 4, performing standing processing or centrifugation separation on the prepared solution to remove incompletely-peeled particles, and collecting the supernatant to obtain a stable dispersion solution of small-size graphene. According to the preparation method, a rotor rotating with a high speed drives a fluid to have a high-speed motion, so that high velocity gradient and high shear force are generated, and also graphite sheets are subjected to peeling and refining because the high-speed fluid bumps bosses of a hole wall of a stator, and the prepared graphene is small in dimension, concentrated in distribution and high in single-layer ratio. The method has the characteristics of small equipment investment, low raw material cost, simple, easy and practicable operation and impressive output, and is suitable for large-scale industrialized production as well as laboratory research.

The invention discloses a method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel. The method is characterized by comprising the following steps of: obtaining Cr12MoV or Cr12Mo1V1 steel by adopting primary smelting with an electric furnace, ladle refining and vacuum degassing process smelting; pouring the tapped steel to form a 6 to 9t octangular ingot; conveying the octangular ingot to a press at the temperature of more than or equal to 300 DEG C, forging the octangular ingot to a blank with the diameter of 300 to 700 millimeters, removing surface defects by annealing, polishing or turning and local grinding, performing cold saw cutting on the end face and blanking to form a cake blank; and heating the cake blank to the temperature of between 1,150 and 1,190 DEG C, upsetting and forging the cake blank by using the press, annealing and turning, and thus obtaining the large cake forgings of the high-carbon and high-chromium cold working die steel. By adopting the method, the yield is improved to 40 to 60 percent; and the manufactured large cake forgings of the high-carbon and high-chromium cold working die steel can comprehensively meet the requirements of hardness, impact toughness and the like and ultrasonic flaw detection quality.

The invention relates to the field of multi-principal element high-entropy alloy materials and in particular relates to a method for preparing a high-entropy alloy coating, belonging to the field of coating preparation. The method for preparing the high-entropy alloy coating comprises the following steps: pretreating a substrate, so that the surface of the substrate is clean and flat; preparing high-entropy alloy powder, uniformly mixing, and adding 3-6wt% of organic solution in the alloy powder; uniformly mixing the organic solution and the high-entropy alloy powder, and preparing into paste; uniformly coating the pasty alloy powder on the treated substrate, wherein the thickness of the coating layer is 0.3-6mm; baking the treated coating layer and substrate in an oven at the temperature of 55-80 DEG C for 20-30 hours; cladding the coating layer on the surface of the substrate through gas tungsten arc welding. According to the method for preparing the high-entropy alloy coating, the high-entropy alloy coating with the thickness of 0.3-6mm can be prepared, a heat affected zone to the substrate in the preparation process is small, and the coating is uniform in distribution and firmly bound to the base material.

The invention relates to the technical field of organic silicon polymer application and provides a preparation method of a shear thickening fluid. The preparation method realizes compatible matching of micro/nano-particles and a dispersion medium and improves system shear thickening effects and system storage stability. The shear thickening fluid is prepared by mixing micro/nano-particles and an organic silicon polymer, wherein a mass ratio of the micro/nano-particles to the organic silicon polymer is (1-3): (2-4). The preparation method is simple and has short preparation time. The shear thickening fluid obtained by the preparation method has stable quality, can be mass-produced easily, has low energy consumption, produces less three wastes and has a low cost. The invention also provides a use of the shear thickening fluid in a liquid protection composite material. The liquid protection composite material prepared from the shear thickening fluid has no toxicity and no pollution and is suitable for a human body and industrial production.