76results about How to "Efficient manufacturing" patented technology

The invention relates to a preparation method of a three-dimensional ferrocobalt metal oxide oxygen evolution catalyst. According to the method, foamed nickel is selected as a carrier, the foamed nickel is pretreated, a metal ion and ethanol mixed solution is evenly adsorbed to the surface of the foamed nickel, then open fire ignition is carried out, and a second-level self-limiting combustion process is carried out, so that metal ions form a ferrocobalt metal oxide material with a three-dimensional network structure in situ on the surface of the foamed nickel. The method is simple and easy to implement, a target product can be generated within second-level time, and the area of a foamed nickel matrix is adjusted according to needs, so that the three-dimensional ferrocobalt metal oxide catalyst is prepared on a large scale. The material obtained by the invention is used as an oxygen evolution anode catalyst, and the three-dimensional network-shaped ferrocobalt metal oxide oxygen evolution catalyst shows excellent electrochemical performance.

The invention relates to the technical field of composite material bonding, in particular to a large-thickness composite material multi-layer bonding tool and process, the large-thickness composite material multi-layer bonding tool is used for assisting bonding of composite material plates, the bonding tool comprises an upper pressing plate and a lower bottom plate which are arranged in parallel, the upper pressing plate and the lower bottom plate are connected through a stand column, and the upper pressing plate is connected with a hydraulic device and used for applying pressure; a first heating plate is arranged on the face, away from the hydraulic device, of the upper pressing plate, and a second heating plate is arranged on the face, away from the hydraulic device, of the lower bottom plate. According to the large-thickness composite material multi-layer bonding tool and process, the bonding face with the uniform roughness is manufactured through treatment of the demolding cloth, the thickness of the adhesive layer is controlled through the glass beads, the upper pressing plate and the lower pressing plate of the tool are provided with the heating plates, the bonding face is rapidly heated and cured, the heating time of a large-thickness product is shortened, and the production efficiency is improved. The problems that the composite material in the middle of the structure is heated unevenly and the curing degree is insufficient are solved, and large-thickness composite material products can be rapidly and effectively manufactured.

The invention relates to the field of degassing membrane materials, and provides a preparation method of a hollow fiber membrane for degassing. In the preparation process, polyolefin is subjected to melt extrusion, a semi-formed product with a hollow inner cavity is formed under the action of cavity forming fluid, and firstly, the semi-formed product is cooled and pre-crystallized in an air cooling mode; then carrying out secondary cooling crystallization in an air blowing cooling mode, and rolling; and then carrying out annealing treatment, cold drawing treatment, hot drawing chambering and heat setting treatment on the hollow fiber membrane, and cooling to obtain the hollow fiber membrane. Wherein the crystallinity of polyolefin is greater than 40%, the melt index is 1-7g / min (Tm + 20 DEG C, 5kg), and the extrusion temperature of a die head is (Tm + 10)-(Tm + 40) DEG C; and the length-diameter ratio of the die head is 2-5. The polyolefin has proper crystallinity and melt index, and has proper die head extrusion temperature and die head length-diameter ratio in the spinning process, so that the thickness of the film is more uniform, the crystallinity is higher, and the film has a uniform pore structure, high tensile strength and better degassing efficiency.

The invention provides an oxytetracycline injection and a preparation method thereof, and belongs to the technical field of medicine preparation, the preparation method comprises the following steps: uniformly mixing 35-50 parts by weight of polyethylene glycol 400 and water, sequentially adding 0.4-0.6 part by weight of sodium formaldehyde sulfoxylate and 1.6-1.8 parts by weight of magnesium oxide, heating, adding 18-22 parts by weight of oxytetracycline, carrying out a complex reaction, adding monoethanolamine to adjust the pH value to 8.4-8.6, and uniformly stirring to obtain the oxytetracycline injection. And fixing the volume and filtering to obtain the oxytetracycline injection. The oxytetracycline injection prepared from the oxytetracycline can effectively improve the stability and the drug effect, prolong the half-life period of the drug and reduce the irritation.

The invention belongs to the field of astaxanthin synthesis, and particularly relates to an immobilized biological enzyme, a preparation method thereof and a synthesis method of astaxanthin monoester. The preparation method of the immobilized bio-enzyme comprises the following steps: deriving a magnetic carbon carrier, and immobilizing a bio-enzyme liquid on the derived magnetic carbon carrier. The immobilized bio-enzyme obtained by adopting the method provided by the invention can catalyze free astaxanthin to efficiently synthesize astaxanthin monoester, the yield of astaxanthin monoester is relatively high, meanwhile, magnetic loss caused by removal of astaxanthin monoester from a material can be effectively avoided, the problem that the bio-enzyme is difficult to separate in application is solved, and the obtained immobilized bio-enzyme can be recycled.

A peritoneal dialysis (PD) container is provided, comprising an injection-stretch blow-molded container body, an injection site, and a pop-out outlet valve. The PD container can be included in a PD treatment system, which also includes a coil, a patient connector, and a drainage bag. All these components are made of a polyolefin material. In an alternative embodiment, a two-piece outlet delivery device comprising an outlet base insert and a peelable tube can be used instead of the pop-out outlet valve. Kits for the PD treatment system are also provided.

The application relates to a high-pressure-resistant PES filter membrane and a preparation process thereof, which comprises a porous main body, the porous main body comprises a mesoporous layer, a pre-filter layer and a separation layer in sequence along the thickness direction, the surface of one side of the mesoporous layer is a liquid inlet surface, the SEM average pore diameter of the pre-filter layer is larger than that of the mesoporous layer; the PMI average pore diameter of the filter membrane is 0.15-0.6 microns; a plurality of liquid inlet holes are distributed on the liquid inlet surface, the SEM average pore diameter K of the liquid inlet hole is 0.2-1.5 microns, and the hole area rate of the liquid inlet surface is 5-35%; the pore diameter of the liquid inlet hole is not less than 1.5K, which is a main liquid inlet hole, and the hole area rate of the main liquid inlet hole is 2-25%. After the mesoporous layer is introduced into the filter membrane, the mechanical property of the filter membrane is obviously improved, so that the pore structure of the porous main body on the liquid inlet surface and near the liquid inlet surface of the filter membrane does not deform too much under high pressure, so that the filter membrane still maintains a large effective flow channel area, and the high flux and high load of the filter membrane are ensured.

The invention discloses a preparation method and application of a bimetallic nano-enzyme induced MOFs (at) CDs material, and the preparation method at least comprises the following steps: I, dissolving FeCl3, CoCl2 and 2-aminoterephthalic acid in N, N '-dimethylformamide to form a mixed solution I, and carrying out a reaction I to obtain a bimetallic MOFs material; step II, mixing tricarballylic acid and m-phenylenediamine, and carrying out a reaction II to obtain carbon dot powder; step III, dissolving the carbon dot powder obtained in the step II in methanol, and adding rhodamine B dye to obtain a CDs material; and IV, dissolving the bimetallic MOFs material obtained in the step I and the CDs material obtained in the step III in water, stirring, and drying to obtain the MOFs (at) CDs material. The synthesized nano-enzyme is simple to prepare and high in catalytic activity, the carbon dot material is encapsulated into the MOFs material, the fluorescence characteristic of the MOFs material is enhanced, and the carbon dot material is combined with o-phenylenediamine to be used for detecting H2O2.

The invention discloses a pre-lithiation method based on magnetron sputtering and application, and belongs to the field of batteries, and the pre-lithiation method comprises the following steps: S1, cutting a base material to be pre-lithiated into a required size for later use in advance; s2, the cut base material is placed on an objective table in a magnetron sputtering working chamber, a cabin door is closed, a vacuum pump is started, the interior of equipment is vacuumized, when the internal pressure reaches a fixed value A, argon is introduced at a certain gas flow, and the angle of a gate valve is adjusted to enable the internal pressure to be kept at a fixed value B; then, all sputtering parameters are set and recorded, and the base material is subjected to pre-lithiation; and S3, the base material subjected to magnetron sputtering pre-lithiation is subjected to lossless transfer through a glove box, and the influence of air on the pre-lithiation material is avoided. The method not only can be compatible with various battery systems, but also can effectively control the process, so that the pre-lithiation efficiency is greatly improved. In addition, the pre-lithiated material can be transferred in a lossless manner through a glove box, so that the influence caused by air is avoided.

The present invention addresses the problem of providing a method capable of solving the problems of conventional known solids and crystallization methods relating to a triphenol compound represented by chemical formula (A). As a solution, a crystal of a triphenol compound represented by chemical formula (A) and a method for producing the same are provided. [chemical] # imgabs0 #

The present invention provides an information creation method and an information creation device for effectively creating additional information relating to the characteristics of each of a plurality of sounds included in sound data. An information creation method according to one embodiment of the present invention comprises: a first acquisition step for acquiring sound data including a plurality of sounds from a plurality of sound sources; a setting step of setting accuracy for the sound source or the sound; and a creation step for creating, on the basis of the accuracy, information relating to the characteristics of the sound as attached information of the moving image data corresponding to the sound data.

The invention relates to a hot-rolled high-strength steel strip having a composition, in wt%, C: 0.06-0.12 wt%, Mn: 1.20-2.20 wt%, Ti: 0.07-0.15 wt%, Si: up to 0.65 wt%, Al: up to 0.10 wt%, P: up to 0.02 wt%, S: up to 0.01 wt%, Nb: up to 0.03 wt%, N: up to 0.01 wt%, optionally one or more elements selected from the group consisting of Cr: up to 0.25 wt%, Mo: up to 0.10 wt%, V: up to 0.30 wt%, P: up to 0.20 wt%, S: up to 0.01 wt%, N: up to 0.01 wt%, and optionally one or more elements selected from the group consisting of Fe: up to 0.20 wt%, Mn: up to 0.20 wt%, N: up to 0.20 wt% %, Cu: up to 0.20 wt.%, Ni: up to 0.50 wt.%, B: up to 0.005 wt.%), the balance being Fe; the invention relates to a steel plate having a microstructure of precipitation-strengthened acicular / bainite ferrite and / or bainite having an MOD index of at least 0.85 at 1 / 4 thickness, a second phase component of at most 5 vol%, an average grain size (GSN 15) of at most 2.0 [mu] m in the rolling direction and based on a grain tolerance angle of 15 degrees, a total large-angle grain boundary length (sigma GBL 15-65) at 1 / 4 thickness of at least 1060 mm1, and a thickness of at least 10 [mu] m. And a gamma-fiber X-ray random intensity ratio measured by XRD at 1 / 2 thickness of at least 27; and wherein the steel strip has at least the following mechanical properties: a yield strength of 600-820 MPa, an ultimate tensile strength of 730-950 MPa, a tensile elongation of at least 11%, a reaming capacity of at least 45%, a work of fracture of at least 100 J. The invention also relates to a method for producing such a hot-rolled high-strength steel strip.

The present invention relates to a substrate for spectroscopic analysis comprising a polycrystalline structure and a method for manufacturing the same. More specifically, the present invention relates to a substrate for spectral analysis based on a general-purpose material including a polycrystalline structure having improved signal strength and signal uniformity, and a method for manufacturing a substrate for spectral analysis including a polycrystalline structure having a shape controlled by a simple process on the surfaces of various materials.

The objective of the present invention is to provide a method and a system for continuous production of microorganisms without the need for sterilization. The present invention provides a novel method for continuously producing microorganisms by proliferating a stored microorganism inoculum without the need for sterilization and a system therefor. According to the present invention, a novel method and system for producing microorganisms in which the need for sterilization for avoiding contamination with unwanted bacteria is reduced as compared with general methods and systems for producing microorganisms are provided.

The invention discloses a method for improving the bottom layer quality of copper-containing oriented silicon steel and the copper-containing oriented silicon steel, and belongs to the technical field of electrical steel manufacturing. The method for improving the quality of the copper-containing oriented silicon steel bottom layer comprises the steps that molten steel with specific components is smelted and then subjected to continuous casting to form a blank, then the plate blank is subjected to heating, hot rolling and acid pickling and then subjected to primary cold rolling to obtain a primary cold-rolled plate, then the primary cold-rolled plate is subjected to intermediate annealing and secondary cold rolling to obtain a secondary cold-rolled plate, and the secondary cold-rolled plate is subjected to hot rolling and acid pickling to obtain the copper-containing oriented silicon steel bottom layer. And after decarburization annealing is conducted on the secondary cold-rolled sheet, the secondary cold-rolled sheet is coated with a separant, then high-temperature annealing and purification annealing are conducted in sequence, and finally uncoiling, flat stretching annealing and insulating coating coating are conducted to obtain the copper-containing oriented silicon steel. According to the method, the machining stress of secondary rolling is eliminated, the situation that the oxidation film is broken due to the too large pressing rate is avoided, the glass film bottom layer good in quality is obtained, the magnetic performance of a product is improved, and iron loss is reduced.

A lithium electrochemical energy generation and storage device includes a negative electrode, a positive electrode, at least one separator between the negative electrode and the positive electrode, an electrolyte, and at least one current collector in contact with at least one of the negative electrode and the positive electrode; wherein the current collector exhibits an electrical resistivity greater than 0.005 ohm / square; wherein the electrochemical device exhibits a 2C capacity greater than 70% of the capacity measured at 0.5 C, such a current collector further comprising an insulating support layer coated with at least one electrically conductive layer wherein the electrically conductive layer has a thickness of less than 2 microns.

The invention relates to the field of pipelines, in particular to a PE profile which at least comprises a first PE layer and a second PE layer, the first PE layer is of a strip-shaped structure, and the second PE layer wraps and is welded to the peripheral side wall of the first PE layer. According to the PE profile, the second PE layer wraps the first PE layer and is welded to the first PE layer, so that the size of the PE profile can be increased, namely, the size of the PE profile is increased by wrapping the core material layer by layer instead of directly extruding and molding the PE profile to a specified size at a time, and the outer wrapping layer can be welded to the core material by utilizing the material characteristics of PE; therefore, the core material can be independently cooled and then is coated with the outer cladding layer to form the PE profile, the problems that a large-size PE profile is directly extruded and processed, internal cooling is slow, and stable forming is difficult are solved, and the PE profile is convenient to manufacture, stable in structure, convenient to control in size, high in yield and good in effect.

The invention discloses an asymmetric gradient sintering composite medium as well as a preparation process and application thereof. The composite medium comprises a supporting layer, a composite layer and a separation layer for intercepting various fine substances, wherein the separation layer comprises first particles for forming a porous structure; the supporting layer comprises second particles for forming a porous structure, and the composite layer comprises first particles and second particles for forming a porous structure; the first particles and the second particles are polyethylene substances; the thickness of the composite layer is not less than 0.1 mu m, and the crystallinity of the separation layer is 40-85%; the PMI average pore size of the composite medium is 0.1-25 [mu] m, and the overall porosity is 25-75%; the whole composite medium has proper aperture and porosity, and has the composite layer with certain thickness, so that the composite medium has high composite strength while having high interception efficiency and high flux, and the separation layer and the support layer are not easy to separate during long-time work; the method is especially suitable for recycling catalysts and precious metals.

The present invention provides a secondary battery in order to improve the life and stability of the secondary battery by cutting off a current in an abnormal operating state of the secondary battery, the secondary battery comprising: an electrode assembly; an electrode current collector extending from the electrode assembly; the electrode tab is electrically connected with the electrode current collector; and a current cutoff member disposed between the electrode current collector and an electrode tab, the current cutoff member including: a first member connected to the electrode current collector and including a PTC element; and a second member connected to the electrode tab, the first member including a structure protruding upward in the direction of the electrode tab at or above a predetermined current value to be separated from the electrode current collector.

The invention provides an oxytetracycline hydrochloride injection and a preparation method thereof, and belongs to the technical field of medicine preparation.The preparation method comprises the steps that 40-70 parts of propylene glycol and water are taken to be evenly mixed, 0.4-0.6 part of sodium formaldehyde sulfoxylate and 0.8-1.0 part of magnesium oxide are sequentially added, then heating is conducted, 8-12 parts of oxytetracycline hydrochloride is added, a complex reaction is conducted till oxytetracycline hydrochloride is completely dissolved, volume metering and filtering are conducted, and the oxytetracycline hydrochloride injection is obtained. The oxytetracycline hydrochloride injection is obtained. The oxytetracycline hydrochloride injection prepared from the oxytetracycline hydrochloride can effectively improve the stability and reduce the irritation.

The present invention aims to provide a method for effectively preparing a cell mass containing pituitary tissue from pluripotent stem cells. The method for preparing a cell mass containing pituitary tissue comprises the following steps (1) and (2): (1) in the first step, pluripotent stem cells are suspended and cultured in the presence of a substance that inhibits the Wnt signal transduction pathway to form cell aggregates; (2) in the second step, the aggregates obtained in the first step are suspended and cultured in the presence of a substance that acts on the BMP signal transduction pathway and a substance that acts on the Sonic hedgehog signal transduction pathway to obtain a cell mass containing pituitary tissue.

The invention discloses a preparation method and application of a CDs / RhB-coated HZif-8 composite material, and the preparation method at least comprises the following steps: step I, dissolving ZnSO4 and 2-methylimidazole in methanol to form a mixed solution I, and reacting I to obtain a graded porous MOFs material; step II, dispersing citric acid and polyethyleneimine in N, N '-dimethylformamide to form a mixed solution II, and reacting the mixed solution II to obtain a carbon dot material; and step III, mixing the graded porous MOFs material obtained in the step I, the carbon dot material obtained in the step II and a rhodamine B solution, stirring, and drying to obtain the CDs / RhB-coated HZif-8 composite material. The synthesized material integrates two functions and can realize detection and removal of antibiotics, the graded porous MOFs structure can allow pre-concentration of a target analyte, and the detection sensitivity of the material is remarkably enhanced.

This invention provides a magnetic field-induced growth device for nanomaterials with adjustable magnetic field strength, characterized by having a furnace frame; a magnetic field unit located in the middle of the furnace frame for providing a magnetic field; a heating furnace located on the furnace frame for holding and heating the nanomaterials; and a cooling unit for cooling the upper and lower permanent magnets.

The invention discloses a dough top processing device, which relates to a food processing device, comprising a machine body, a horizontally arranged first conveyor belt is installed at the front end of the machine body, a second conveyor belt installed on the machine body is arranged at the output end of the first conveyor belt, a pleating mechanism for pleating the top of the dough on the first conveyor belt is arranged directly above the first conveyor belt, the pleating mechanism is installed on the machine body through a first displacement mechanism that can drive the pleating mechanism to perform reciprocating motion, and an auxiliary mechanism that can push the dough on the second conveyor belt to make it centered is also arranged, a drilling device for drilling holes in the top of the dough on the second conveyor belt is installed directly above the second conveyor belt, and the drilling device is installed on the machine body through a second displacement mechanism that can drive the pleating mechanism to perform reciprocating motion; the invention can effectively process and pleat the top of the dough and generate a skirt at the same time, so that the prepared buns are closer to the shape of handmade ones.

The present invention relates to a positive electrode active material in which the particle size of primary particles is uniform, so that the amount of fine powder is small, and the particles are rarely crushed in a fine crushing step and a rolling step for manufacturing a lithium secondary battery. The present invention relates to a positive electrode active material, a method for preparing the same, and a positive electrode and a lithium secondary battery comprising the same, in which the positive electrode active material comprises a lithium nickel cobalt manganese-based oxide having a nickel content of 50 mol% or more in all transition metals and being in the form of a single particle consisting of 10 or less primary particles, and a polydispersity index (PDI) value according to Equation 1 described in the specification is 1.0 to 1.8.

This invention discloses a method for preparing a 3-butyn-2-ol derivative of compound (R) of formula (II) from a 3-butyn-2-one derivative of formula (I) via a reduction reaction, wherein the reduction reaction is an enzyme-catalyzed reduction reaction, and the enzyme is selected from carbonyl reductases. This invention can effectively prepare the target compound and has advantages such as simple operation, environmental friendliness, high yield, high selectivity, and low cost, making it suitable for industrial production.

The present application relates to the technical field of moisture-permeable membrane materials, and provides a polysulfone moisture-permeable hollow fiber membrane, the average pore size of a first surface is not greater than 100 nm, and the average pore size of a second surface is not less than 0.25 μm; the content of sulfonic acid groups on the first surface is greater than the content of sulfonic acid groups on the second surface, and the difference between the content of sulfonic acid groups on the first surface and the content of sulfonic acid groups on the second surface is not less than 1X10 ‑3 -4; the water conversion efficiency of the hollow fiber membrane is 40% to 70%, and the water vapor permeation rate of the hollow fiber membrane is 0.5 to 3 g / min. The structure of the polysulfone moisture-permeable hollow fiber membrane provided by the present application shows high water conversion efficiency and water vapor permeation rate, and also has good tensile strength, so that it has a long service life.

The hard carbon raw material purification device comprises a feeder, an extraction chamber, a purification channel, an evaporation chamber and a recovery channel, the feeder is arranged above the extraction chamber; one end of the purification channel is arranged below the extraction chamber, the other end of the purification channel is connected with the top of the evaporation chamber, and a filter is arranged at one end, close to the evaporation chamber, of the purification channel; one end of the recovery channel is connected with the upper part of the evaporation chamber, and the other end of the recovery channel is connected with an extraction liquid inlet of the extraction chamber. The utility model provides a hard carbon raw material purification device which can effectively prepare a hard carbon raw material from low-ash coal, the raw material purified by the hard carbon raw material purification device can obtain a high-purity hard carbon material after being washed, evaporated and dried for multiple times and subjected to high-temperature carbonization treatment, and due to the integrated design scheme of the hard carbon raw material purification device, the high-purity hard carbon material can be obtained. The purification process of the hard carbon raw material is simplified, meanwhile, the chemical reagent for extracting the low-ash coal can be recycled, chemical pollution is reduced, and the purification cost is reduced.

The invention relates to the technical field of chemical engineering, and discloses an organic solvent reverse osmosis membrane separation technology for dearomatization of diesel oil, and the method comprises the following steps: construction of a composite membrane material: preparation of a membrane material P1, and preparation of a thin-layer composite membrane; the organic solvent reverse osmosis testing device is mainly composed of a high-pressure pump, a pressure release valve, three parallel membrane components (membrane tanks 1, 2 and 3), a three-way valve, a pressure gauge, a pressure regulator, a flow meter, a feeding barrel and a pipeline; separating a binary organic solvent mixed system; and separation of an FCC diesel oil simulation system: testing the separation performance of the multi-component organic solvent of the simulated diesel oil by adopting a cross flow permeation system. Compared with a traditional thermal separation mode, the low-energy-consumption and non-phase-change organic solvent reverse osmosis membrane separation technology has the energy use efficiency of 10 times or above, and can become an effective technology for separating aromatic hydrocarbons in diesel oil.

According to the present invention, the following effects are achieved: by subjecting a mixture of 2,2,2-trifluoroacetaldehyde and hydrogen fluoride to a condensation reaction with an aryl compound under anhydrous conditions, 1,1,1-trifluoro-2,2-bisarylethane can be efficiently produced by a simple operation. The obtained 1,1,1-trifluoro-2,2-bisarylethane can be purified by a simple purification method such as crystallization operation and distillation to improve purity.