43results about How to "Low production and preparation costs" patented technology

The invention discloses a kit for detecting alpha 1-microglobulin and a preparation method of the kit. The kit consists of a reagent R1 and a reagent R2 according to the volume ratio of 1: 1. The reagent R1 comprises 120-150 mmol/L of a buffer solution, 3-20 g/L of a stabilizer, 5-20 g/L of electrolyte, 3-20 g/L of a sensitizer, 0.5-10 g/L of a surfactant, 0.2-1 g/L of a preservative and purified water. The reagent R2 comprises 1.5-3.5 g/L of latex microspheres with two grain sizes, 20-150 mmol/L of a suffer solution, 3-20 g/L of a stabilizer, 5-20 g/L of electrolyte, 0.5 g/L of a preservative and purified water, wherein the latex microspheres with two grain sizes are respectively coupled with the same anti-human alpha 1-microglobulin polyclonal antibody. The pH value of the kit is 7.0-9.5. The kit is rapid in detection and high in accuracy. The production cost is greatly reduced. The kit is suitable for industrial production and has high application value.

The invention discloses a bulk heterojunction perovskite solar cell and a preparation method thereof. The perovskite solar cell adopts a co-deposition technology to combine a traditional double-layer structure of a perovskite layer and a hole transport layer into a single-layer bulk heterojunction light absorption layer formed by perovskite and hole transport materials, which can not only save a preparation process of the hole transport layer to simplify the structure and preparation technology of a device, but can also maintain the performance of the device at a higher level, thereby facilitating the practical production and application of low-cost and high-performance perovskite solar cells.

The preparation method of 2,6-dimethylphenol is to pass the reaction material mixed with methanol and water at a liquid space velocity of 0.5-2.0h-1 through a The fixed-bed reactor of the ortho-methylation catalyst is used for gas-phase catalytic reaction at 280-400°C and 0-1.5Mpa pressure to prepare 2,6-dimethylphenol. The ortho-methylation catalyst is composed of iron oxide, indium oxide, silicon dioxide, oxide Chromium, calcium oxide, alkali metal oxides and graphite. The phenol conversion rate of synthesizing 2,6-xylenol in the invention reaches 99 percent, the ortho position selectivity reaches 97 percent, and the service life of the catalyst reaches more than 3000 hours.

The invention relates to a composite material for preparing intermediate strength fibers and a quick forming method and an application hereof. The composite material comprises 100 parts of ultrahigh molecular weight polyethylene, 1-40 parts of a flow modifier, 0-10 parts of a lubricant, 1-40 parts of polyolefin and 0-1 part of an antioxidant. The method comprises the following steps: mixing ultrahigh molecular weight polyethylene with the flow modifier to prepare a compound A; mixing the lubricant with polyolefin through a mixing kettle to prepare a component B; and finally, mixing the component A, the component B and the antioxidant uniformly to prepare the composite material. The application comprises the following steps: extruding the compound special material through a single screw extruder to obtain a precursor; thermally stretching the precursor at 8-64 times at 110-150 DEG C; and finally, coiling the precursor to obtain a product. Compared with the prior art, no solvents are used, so that the method is more environment-friendly. By adding the flow modifier, the melt viscosity is reduced greatly, and the production efficiency is improved. Meanwhile, fibers also have excellentmechanical properties, and can replace nylon in the fields of marine ropes, fishing nets and fish tapes, sports articles and industrial protection.

The invention discloses cerium dioxide nanoparticle reinforced tin silver copper composite soldering paste. The cerium dioxide nanoparticle reinforced tin silver copper composite soldering paste is obtained by blending tin silver copper lead-free soldering paste and cerium dioxide nanoparticles, wherein the mass percentage of the cerium dioxide nanoparticles in the composite soldering paste is 0.05 to 0.5 percent. Through addition of the cerium dioxide nanoparticles, the microhardness and the mechanical property of the composite soldering flux are improved, the growth of solder joint interfaceintermetallic compounds can be effectively inhibited, the crystal particles of the solder joint interface intermetallic compounds can be refined, the welding reliability is improved, and a good application prospect is achieved.

The invention relates to the technical field of rail circuit design, and provides a rail current collecting device, a rail vehicle bogie and a power supply rail. The rail current collecting device comprises the power supply rail and current collectors in contact with the power supply rail, a straddle-type monorail comprises a straddle-type monorail body, a first electrode and second electrodes, wherein the first electrode and the second electrodes are fixed to the straddle-type monorail body, the first electrode extends out of the upper surface of the straddle-type monorail body, the second electrodes extend out of the side surface of the straddle-type monorail body and are symmetrically distributed on the two sides of the first electrode, and the current collectors comprise an upper current collector in electrical contact with the first electrode, and two lower current collectors in electrical contact with the second electrodes located on two sides correspondingly. The rail current collecting device, the rail vehicle bogie and the power supply rail are high in applicability, and the power supply requirement of the rail vehicle can be met regardless of the driving direction of therail vehicle; and in addition, for a rail vehicle needing to be turned on, the rail collecting device can simplify the required rail structure and reduce the production and preparation cost.

The invention relates to a preparation method of a high-density silicon carbide composite and belongs to the technical field of composite processing. The method comprises steps as follows: main materials become a slurry finished product after being treated, the main materials comprise SiC granules and B4C granules, and the B4C granules are taken as a sintering aid; auxiliary materials are added to the slurry finished product, pre-casting slurry is prepared, and the auxiliary materials comprise acrylamide, methylene bisacrylamide and ammonium polyacrylate; ammonium persulfate is added to the pre-casting slurry, the mixture is stirred uniformly and subjected to forming, and a blank body is obtained; the blank body is firstly subjected to solvent degreasing and then subjected to thermal degreasing; the degreased blank body is sintered under the vibration pressure at the temperature of 2,000-2,100 DEG C, and the high-density silicon carbide composite is obtained finally. The prepared silicon carbide composite is uniform and stable in structure and quality, high in density and high in controllability and also has better toughness and strength.

The invention discloses a mineral microbial fertilizer. The mineral microbial fertilizer is mainly prepared from the following raw materials in parts by weight: 20-40 parts of fertilizer-grade calcium hydrogen phosphate, 20-40 parts of phosphogypsum, 10-18 parts of organic carbon, 1-7 parts of a bactericide, 2-5 parts of ammonium chloride and 3-5 parts of potassium chloride. A preparation method of the mineral microbial fertilizer comprises the following steps: a, mixing the raw materials; b, fermenting; a, adding the bactericide; d, drying and smashing; and e, cooling and packaging. The mineral microbial fertilizer disclosed by the invention has the advantages that the mineral microbial fertilizer not only has multiple effects in growth promotion, yield increase, bacteriostasis, disease resistance and soil improvement and restoration but also can provide nutrient elements necessary for growth for crops, and effect of the mineral microbial fertilizer is effectively improved.

The invention relates to a preparation method of a silicon carbide composite material and belongs to the technical field of composite material processing. The preparation method comprises treating main materials to obtain a slurry finished product, wherein the main materials comprise SiC particles and B4C particles as sintering aids, adding auxiliary materials into the slurry finished product to obtain slurry before casting, wherein the auxiliary materials comprise acrylamide, methylene bisacrylamide and ammonium polyacrylate, adding ammonium persulfate into the slurry before casting, carrying out uniform stirring, carrying out injection molding to obtain a blank, degreasing the blank through a solvent, carrying out hot degreasing and sintering the degreased blank under oscillation pressure at a temperature of 2000-2100 DEG C to obtain the silicon carbide composite material finished product. The silicon carbide composite material has uniform and stable structure and quality, high density, good controllability and good toughness and strength.

The invention provides a compound admixture for anti-crack limestone powder and a preparation method of the compound admixture. The compound admixture comprises, by mass, 60-70 parts of limestone powder, 28-40 parts of coal ash, 1-2 parts of polypropylene fibers and 0.1-0.2 part of triethanolamine. By the compound admixture for the anti-crack limestone powder, concrete contraction can be reduced and concrete anti-crack performance can be improved while working performance and mechanical performance of concrete are guaranteed, so that durability of limestone powder concrete is improved, and application of the limestone powder to the concrete is widened.

The invention relates to a green method for preparing high-quality graphene powder on a large scale at an ultra-low cost, which comprises the steps of (1) adding expanded graphite into an aqueous solution containing hydrophilic macromolecules and an alkaline reagent, mixing, and grinding to obtain graphite slurry; (2) carrying out ultrasonic treatment on the obtained graphite slurry, standing for a certain time, and selecting a graphene dispersion solution at the upper layer; (3) adding a precipitator into the obtained graphene dispersion solution, and carrying out suction filtration to obtain a graphene cake; and (4) washing and drying the obtained graphene cake, and roasting in a protective atmosphere at 350-800 DEG C to obtain the high-quality graphene powder.

The invention provides an amino acid Fe (III) chelate for treating and preventing iron-deficiency anemia. The amino acid Fe (III) chelate for treating and preventing iron-deficiency anemia is characterized by comprising the following components in percentage by mass: 10.5-21.7% of ferric iron salt based on iron ions, 5-12.5% of regulator, 30-65% of amino acid and the balance of deionized water. The preparation method comprises three steps of raw material prefabrication, solution preparation and chelation reaction. The novel production and preparation process is simple, the production and preparation cost is low, on one hand, the comprehensive utilization rate of raw materials is effectively increased, and raw material and energy losses in the production and preparation process are reduced;on the other hand, the quality stability of the chelate finished product can be effectively improved, and poor taste caused by iron ion fishy smell and irritation of iron ions to gastrointestinal digestive tracts are effectively reduced.

The invention relates to the technical field of fondaparinux sodium, and discloses a preparation method of fondaparinux sodium. The method comprises the following steps that 20-30 parts of mixed acidis taken, and is poured in a reaction kettle for stirring, at a stirring state, the temperature is increased to 60 DEG C, and then is maintained at 60 DEG C, stirring is continued for 20 min, a solution is left for later use, 10-20 parts of acetyl glucosamine, 20-23 parts of methyl alcohol and 10-14 parts of alkyl thiophosphate are taken in sequence, and are placed in a stirrer for full mixing, through ion exchange resin, reflux reaction is carried out for 10-20 hours, the reaction temperature is controlled at 50-70 DEG C, and a material is left for later use. According to the preparation method of fondaparinux sodium, through sedimentation, high-purity fondaparinux sodium is prepared, in a whole production process, through multiple distillation and separation processes, fondaparinux sodium impurities are removed thoroughly, obtained fondaparinux sodium has higher purity, through a whole vacuum concentration technology, fondaparinux sodium is purer, reaction of various links is carriedout more thoroughly, the production effectiveness is guaranteed, and the high purity of fondaparinux sodium is guaranteed.

The invention relates to the field of catalytic cracking catalyst preparation, and discloses a catalytic cracking catalyst and a preparation method thereof. The method comprises the following steps: 1) carrying out first ion exchange reaction on a sodium molecular sieve and a solution containing ammonium ions to obtain a molecular sieve subjected to ammonium ion exchange; 2) under a microwave condition, carrying out a second ion exchange reaction on the molecular sieve subjected to ammonium ion exchange and a solution containing rare earth element ions to obtain a molecular sieve containing rare earth elements; and 3) pulping the rare earth element-containing molecular sieve obtained in the step 2), clay, a binder, water and inorganic acid into gel, and drying and roasting the obtained gel. By adopting the method provided by the invention, roasting is not needed when the molecular sieve containing the rare earth elements is prepared, the preparation process is simple, and the catalytic cracking catalyst is excellent in catalytic performance.

The invention relates to the technical field of graphene electric heating films, and discloses a graphene electric heating film and a preparation method thereof. The graphene electric heating film comprises a graphene electric heating film body formed by sequentially and compositely connecting an insulating heat conduction layer, a graphene electric heating film layer, an insulating heat insulation layer and a film forming substrate, wherein a plurality of hollowed-out holes are formed in a graphene electric heating film layer in the graphene electric heating film body, and the plurality of hollowed-out holes are uniformly arranged. According to the invention, the plurality of hollowed-out holes are formed in the graphene electric heating film layer, and the plurality of hollowed-out holes can be processed on a specific mold for producing the graphene electric heating film layer, so the use amount of preparation materials can be reduced to a certain extent, production and preparation cost is saved, the lightweight use requirement is met, and an actual use range is widened.

The invention provides an acoustic metamaterial based on an impedance matching effect and an acoustic device. The acoustic metamaterial comprises a plurality of microstructures, and the microstructures are of a plane symmetrical structure. The microstructures are formed by arranging a plurality of groups of hard boundary material structures with sound wave incident gaps along a preset axis, and the symmetric plane of the microstructures are perpendicular to the preset axis; and the plurality of groups of hard boundary material structures comprise at least two groups of hard boundary material structures with different effective sound speeds. According to the acoustic metamaterial based on the impedance matching effect, incident sound waves can pass through the hard boundary material in a wide working frequency range in a wide-angle and almost non-reflective mode, the problem that impedance of a traditional hard boundary material is not matched is solved, and the application range of some common hard boundary materials in daily life in acoustic engineering is widened.

The invention provides a preparation method of a novel hydrogen catalytic combustion non-noble metal catalyst, and belongs to the field of hydrogen catalytic combustion. The preparation method comprises the following steps: taking cordierite Mg2Al4Si5O18 as a carrier; coating a coating slurry prepared by taking gamma-Al2O3 powder as a raw material; preparing a manganese-cobalt-copper-iron-nickel mixed solution according to different manganese-cobalt-copper-iron-nickel atom molar ratios, dipping to obtain 10wt% MnO2-Co2O3-CuO-Fe2O3-NiO/gamma-Al2O3/cordierite, and preparing a catalyst product through reduction in H2 atmosphere. The non-noble metal supported catalyst containing cobalt, manganese and other elements can be used for replacing a noble metal catalyst, and can solve the problems that the noble metal catalyst in the industry is extremely expensive and is easy to lose at high temperature. The catalyst prepared in the invention can realize catalytic combustion at a low hydrogen temperature and has excellent catalytic performance, heat resistance, stability and economical performance.

The invention provides animal husbandry disinfection dry powder containing T-ZnOw and nano composite inorganic matters. The animal husbandry disinfection dry powder is composed of the following components in percentage by mass: 1.1-3.4% of nano silver, 8-13% of silver nitrate premix in percentage by silver ion, 15-31.3% of nano T-ZnOw, 23-45.3% of montmorillonite, 1.3-3.5% of sodium bicarbonate, 1.1-3.2% of glucose, 1.9-2.2% of sodium chloride, 0-2.8% of composite antibiotics, and the balance of polypropylene super absorbent resin. The preparation method comprises three steps of primary mixing, solution preparation and secondary mixing and blending. On one hand, compared with traditional disinfection powder, the disinfection capacity is greatly improved, and the application range of killing and inhibiting capacity of harmful microorganisms such as bacteria and viruses is effectively expanded; on the other hand, in the using process, the disinfectant has the sterilization and anti-inflammation capacity on livestock body surface wounds, the livestock body surface health can be effectively improved, and livestock cross infection caused by skin diseases is prevented.