37results about How to "Uniform particle size dispersion" patented technology

The invention belongs to the technical field of lithium ion batteries, and in particular relates to a high tap density lithium manganese iron phosphate positive electrode material and a preparation method and application thereof. The positive electrode material is prepared by mixing small particles of lithium manganese iron phosphate with a particle size of 0.3-0.8um and large particles of lithium manganese iron phosphate with a particle size of 3-5um in a mass ratio of 1-9:9-1, and the preparation method includes : (1) Preparation of dense ferromanganese phosphate; (2) Preparation of large and small particles of lithium iron manganese phosphate slurry; (3) Preparation of lithium iron manganese phosphate precursor powder; (4) Preparation of finished product of lithium iron manganese phosphate ; The obtained material is applied to the positive electrode material of lithium battery. The lithium manganese iron phosphate prepared by the invention has high tap density, high electrical capacity, good rate performance, high charge and discharge efficiency, large gram capacity, simple preparation process and easy control, low energy consumption and raw material cost, high production efficiency, It can be applied to large-scale industrial production.

The invention discloses yam bean dietary fiber powder with a prebiotic function and a preparation method thereof.The yam bean powder is prepared by taking fresh yam bean tuberous roots as raw materials through the steps of cleaning, peeling, slicing, color protecting, first-time grinding, freezing grinding, limited enzymolysis performing and drum drying, crosslinking adsorbing, complexing, secondary grinding, mixing, extrusion granulating, sieving and packaging, the prepared yam bean powder retains all dietary fibers of the yam beans and the original flavor of the yam beans, contains high-resistance starch and has the instant solubility and the prebiotic function.According to the yam bean dietary fiber powder with the prebiotic function and the preparation method thereof, embedding crosslinking, complexing, enzymatic debranching treating and drum drying are combined to be applied to the production process of the yam bean dietary fiber powder, the dissolving ability of the yam bean powder can be effectively improved, the fluidity and solubility are improved, the content of the resistance starch in the product is increased, and the significant effects on regulating the intestinal microecological balance and improving the gastrointestinal function are achieved; in addition, powder granules produced through extrusion granulating are uniform in granule size, loosened and porous and can be swelled and gelatinized in a short time, and therefore the good instant solubility and wet permeability are achieved.

The invention provides a chitosan modified cationic starch emulsifier and a method for preparing AKD emulsion thereof. The chitosan modified cationic starch emulsifier is obtained by reacting chitosan, cationic starch and crosslinking agent glutaraldehyde. It contains cationic starch, chitosan grafts and unreacted chitosan and cationic starch. Compared with cationic starch emulsifier, the sizing effect of chitosan-modified cationic starch emulsified by AKD is more significant. The KAD emulsion prepared by using this emulsifier has the advantages of good stability, small dairy particle size, environmental protection, and no organic chlorine, and can be applied to the preparation of food packaging paper.

The invention relates to a preparation method of a thin film material, and more specifically relates to a preparation method of a La0.7Ca0.25Sr0.05MnO3 ferromagnetic thin film. The preparation method comprises following steps: 1, lanthanum nitrate is added into a mixed solution of glacial acetic acid and ethylene glycol monomethyl ether so as to obtain a solution A; 2, a mixture of calcium acetate and strontium nitrate is added into the mixed solution of glacial acetic acid and ethylene glycol monomethyl ether so as to obtain a solution B; 3, manganese acetate is added into the solution B so as to obtain a solution C; 4, the solution A is mixed with the solution C, and 1 to 10ml of acetic acid is added so as to obtain a La0.7Ca0.25Sr0.05MnO3 solution; 5, a substrate is subjected to ultrasonic processing in acetone and absolute ethyl alcohol successively; 6, the La0.7Ca0.25Sr0.05MnO3 solution is added onto the processed substrate dropwise for spin coating so as to obtain a thin film D; 7, the thin film D is subjected to presintering so as to obtain a thin film E; 8, the thin film E is delivered into a rapid heat treatment furnace for roasting, and is cooled with the rapid heat treatment furnace to room temperature so as to obtain the La0.7Ca0.25Sr0.05MnO3 ferromagnetic thin film. The preparation method is capable of solving problems of existing technology used for preparing the La0.7Ca0.25Sr0.05MnO3 (LCSMO) ferromagnetic thin film that performance is poor, purity is low, density is low, and sintering temperature is too high in preparation processes. The LCSMO ferromagnetic thin film with uniform film thickness and excellent magnetocaloric effects is prepared via modified sol-gel method.

The invention relates to the field of medicinal preparations, in particular to a preparation method for a nanoliposome preparation of doxorubicin hydrochloride or doxorubicin. The preparation mainly comprises doxorubicin, egg yolk lecithin, cholesterol, an antioxidant, a buffer, sugar, injection water and the like. A preparation process comprises steps of preparation of blank liposome and doxorubicin nanoliposome, a process optimization step and the like. Freeze-dried powder prepared by the invention has high entrapment efficiency, high stability and a simple and practical preparation process.

The invention discloses a preparation method of superfine anthraquinone. The preparation method of superfine anthraquinone comprises the following steps: a finished anthraquinone product, an organic solvent and water are mixed, stirred and dispersed, and a suspension is obtained; the suspension is pumped to a spray dryer for spray drying, and a product is obtained, wherein the mass ratio of the organic solvent to the water is 3%-6%:1, and the organic solvent adopts methyl alcohol or methyl tert-butyl ether. The preparation method has the advantages that flying powder is reduced, and environmental protection is realized.

The invention relates to a preparation method of a Mn element-doped cyclodextrin polymer material with an adsorptive separation function and application thereof. The Mn element-doped cyclodextrin polymer material takes cyclodextrin macromolecular polymer as the main body, and is prepared by simple and practicable inverse emulsion polymerization and KMnO4 solution dipping treatment. The cyclodextrin polymer material is characterized by relatively good spherical appearance, good mechanical strength and water setteability and dispersity, can fill the glass column and is easy to separate and regenerate for use. Meanwhile, the material can effectively adsorb and separate pesticide composite in water. The preparation method of the material is simple and low in cost, and thus has high application values and broad application prospect.

The invention discloses multi-pipe material aerial pushing equipment. The multi-pipe material aerial pushing equipment comprises a feed funnel; a discharge port of the feed funnel communicates a first feed pipe; a rough screen is arranged in the first feed pipe; a second feed pipe communicates above a discharge end of the first feed pipe; a heating device is arranged in the second feed pipe; a crusher communicates above a discharge end of the second feeding pipe, and includes a machine body; a feed port of the machine body communicates the discharge end of the second feed pipe; a rotary crushing cutter at least including two blades is arranged in the machine body; multiple projections are arranged on the surfaces of the blades of the crushing cutter; and a discharge pipe communicates below the machine body. The multi-pipe material aerial pushing equipment enables the particle sizes of materials, finally participated in the reaction, to be smaller through primary screening, heating dehumidification and crushing of powder-shaped materials, and is more uniform in dispersion of the particle sizes.

The invention relates to a blue fluorescent powder for white-light LED and a preparation method thereof. The chemical formula of the powder is Sc<4-4x>Al6Si3O21:4xCe<3+>; wherein in the formula, x represents the mole doping amount of rare earth activated ions (Ce3+), which are doped on the Sc3+ positions, 0.001<=x<=0.700. The prepared fluorescent powder can be well activated by the ultraviolet lights with a wavelength of 300 to 400 nanometers. The fluorescent powder can emit blue lights having a main peak at 425 nanometers, and thus the fluorescent powder can be well matched with an ultraviolet LED. The fluorescent is prepared by mixing compounds containing the required elements through a high-temperature solid-phase method or chemical synthesis method. The technology is simple and flexible, the repeatability is good, the operation is easy, the sources of the raw materials are wide, the chemical stability and thermal stability of the obtained products are both very good, crystallizing property of the synthesized fluorescent powder is good, the morphology is regular, the particle size is uniform, the luminescent efficiency is high, and thus the fluorescent powder is suitable for the preparation of LEDs excited by ultraviolet lights or near ultraviolet lights.

The invention provides a positive electrode material of a lithium-sulfur battery and a preparation method thereof, and aims at improving the electronic and electric conductivity so as to improve the capacity of a positive electrode of the lithium-sulfur battery and prolong the circle life of the lithium-sulfur battery, and solving the problem that the capacity of the positive electrode of the lithium-sulfur battery rapidly decreases, resulting in short circle life of the battery. The positive electrode material is characterized in that a BaTiO3 material is introduced, so that the electronic and electric conductivity of the positive electrode material can be improved, and the capacity and the circulating performance of the electrode can be effectively improved; the introduced porous carbonmaterial is high in specific area and high pore distribution performance, and a large number of elemental sulfur can be stored, so that high sulfur content in a composition is ensured; sulfur is uniformly distributed in porous carbon, so that the utilization rate of active substances of the sulfur can be increased; the pore channel structure of the porous carbon relieves the dissolution loss of anintermediate product which is polysulfide lithium, thus the shuttling effect is reduced; the service life of the battery is prolonged, and the coulombic efficiency is improved. The preparation methodis simple in processes, simple in equipment, short in manufacturing period, easy to operate, low in energy consumption, environmentally friendly, and easy for industrial production.

The invention discloses a multipurpose polylysine fluorescence self-assembly nano microsphere carrier and a preparation method and application thereof. By nano self-assembly technique, rhodamine marked polylysine fluorescence self-assembly nano microspheres can be prepared, azide group side chains with disulfide bonds can be modified, and by use of a click chemistry method, an alkynyl modified drug is connected with the fluorescent nano microspheres. The polylysine self-assembly nano microspheres linked with the drug can be used for tracing imaging analysis of the modified drug in animal and cell level. At the same time, the polylysine self-assembly nano microspheres can also be used to capture binding proteins of the modified drug, can release target binding proteins and associated proteins by cleavage of the disulfide bonds, and can be used for the study of drug effect targets. The invention provides a simple and fast tool and method for the study of the drug effect targets, and the method integrates drug tracing, target positioning and target protein capture and separation functions, is simple and practical, and has good application prospect in the study of drug action mechanisms and target discovery.