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9726results about How to "Raw materials are cheap and easy to get" patented technology

Preparation method of metal organic framework based composite phase-change material

The invention relates to a preparation method of a metal organic framework based composite phase-change material. The method comprises the steps that a metal organic framework material substrate is prepared selectively; hole diameter size design and hole channel polarity regulation and control are performed on the substrate according to the size and the kind of a core material, so that a phase-change core material to be loaded is matched better; the soluble phase-change core material is prepared into a solution; a metal organic framework material is dispersed in the prepared phase-change material solution; a phase-change material is adsorbed by utilizing an extra-large specific surface area and a nano hole channel structure of the metal organic framework material; drying is performed; and then the metal organic framework composite phase-change material with a shaping effect is obtained. According to the method, a novel metal organic framework based composite phase-change material is developed; the prepared metal organic framework based composite phase-change material can effectively avoid leakage and the like, and has the advantages of adjustable nano hole structure and wide core material selection range; the method is simple in technology and mild in reaction condition, and is suitable for scale production; and a raw material is cheap and easy to obtain.
Owner:UNIV OF SCI & TECH BEIJING

Hydrothermal synthesis method for lithium ion-cell anode material of ferric phosphate lithium

The invention discloses a hydrothermal synthesis method of lithium-ion battery anode material of lithium iron phosphate, relating two kinds of metal phosphate. The steps are as follows: lithium source and phosphorus source are dissolved in water or mixed with water, and added into the reaction autoclave, the quaternary cationic surfactants and the alkylphenols polyoxyethylene ethers nonionic surfactant is also added into the reaction autoclave, the air in the dead volume of the autoclave inside is purged by the inert gas, the autoclave is sealed and heated to 40-50 DEG C with stirring, a feed valve and an exhaust valve are opened, pure ferrous salting liquid is added into the autoclave, and then the autoclave is sealed for the reaction of the material at 140 to 180 DEG C for 30 to 480 minutes; the mixture ratio of the invention is set as follows: the molar ratio of Li, Fe and P is 3.0-3.15:1:1.0-1.15, and then the resultant is filtered, washed, dried and carbon-coated, thus the lithium iron phosphate is obtained. The lithium iron phosphate which is produced by the invention has the advantages that: the electrochemical performance is excellent, the particle size distribution of which the D50 is between 1.5 um to 2 um is even, the phase purity is above 99 percent and the electronic conductivity of the material is improved.
Owner:HEBEI LITAO BATTERY MATERIAL

Current collector carbon coated aluminum foil and its preparation method

The invention discloses a current collector carbon coated aluminum foil and its preparation method. A carbon-containing composite layer is arranged on the substrate of the current collector carbon coated aluminum foil, and is combined with the substrate through a binder, wherein the thickness of the carbon-containing composite layer is 1-100mum; the carbon-containing composite layer comprises granular conductive carbon black pre-dispersed by a dispersant, and fibrous conductive carbon; the granular conductive carbon black and the fibrous conductive carbon filled between the layers of the granular conductive carbon black form a netted node form conductive network. The composite layer is tightly combined with the substrate of the aluminum foil, so the conductivity and the corrosion resistance of the aluminum foil are improved, and the aluminum foil is protected from oxidation or chemical corrosion. The preparation method of the aluminum foil comprises the following operations: mixing the conductive carbon black with the dispersant in an organic solvent to pre-disperse, adding the fibrous conductive carbon, uniformly mixing, adding the binder to prepare a slurry, coating on the aluminum foil, and carrying out vacuum drying. The current collector carbon coated aluminum foil enables the interface impedances of the current collector and an active layer to be reduced, the internal resistance of a battery to be reduced, and the cycle life and the ratio performances of the battery to be improved when the aluminum foil is used as a lithium ion battery anode current collector. The aluminum foil has the advantages of simple technology, low cost and wide application prospect.
Owner:HUNAN CMAX NEW ENERGY TECH

Method for regulating ZIF-8 crystal morphology by utilizing surfactant

The invention provides a method for regulating ZIF-8 crystal morphology by utilizing a surfactant and belongs to the technical field of synthesis of porous materials. The method disclosed by the invention is mainly characterized in that the morphology and size of the ZIF-8 crystal are controlled by adding a certain amount of a surfactant. The specific preparation method comprises the following steps: respectively dissolving a zinc salt, a surfactant and dimethyl imidazole into a certain amount of water, stirring to enable the components to be fully dissolved, and preparing a solution; mixing adimethyl imidazole solution and a surfactant solution, fully stirring, finally adding a zinc salt solution, and mixing and stirring for 10 minutes; then transferring the mixed solution into a high temperature reactor, and reacting at a constant temperature for several hours; cooling, centrifuging, washing and drying, thereby obtaining the ZIF-8 crystal. The ZIF-8 crystal prepared by the method has excellent crystallinity and has five morphologies such as rhombic dodecahedron, cube, sheet, interpenetration twin and rod. The invention provides a novel method for controlling the morphology and size of MOFs materials.
Owner:NANJING UNIV OF TECH

Sol-gel method for preparing earth silicon/titanic oxide hollow microballoon

The invention provides a method for preparing an SiO2 / TiO2 hollow microsphere by a sol-gel method. The method is mainly characterized in that cation polystyrene microsphere (PS) is used as a formwork; ethyl silicate and butyl titanate are respectively used as raw material and diluted ammonia is taken as regulator of pH value; a multi-layer organic-inorganic hybrid composite microsphere is obtained by the sol-gel reaction under the temperature of 70-80 DEG C. Formwork particle of the obtained deposition is removed by a calcining process to obtain the SiO2 / TiO2 hollow microsphere. By changing the consistency of reactant, content of surfactant and calcining temperature, the SiO2 / TiO2 hollow microsphere with different spherical shell thickness, density and grain size can be obtained. The hollow microsphere prepared by the method has high photo-catalytic activity, overcomes the shortage that existing preparation method of hollow microsphere can only prepare single shell layer microsphere; the multi-layer hollow microsphere can be prepared, the technique is simple, the cost is low and the preparation method of the invention is suitable for industrialized production.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI

High-liquid absorbing rate micro-nano structure polymer electrolyte membrane and preparation method thereof

The invention discloses a preparation method of a high-liquid absorbing rate micro-nano structure polymer electrolyte membrane, wherein the membrane is prepared by polymer material being packed on a support frame. The method comprises the following steps of: by being processed, the polymer membrane has a micro-nano structure, forms holes with micron level and nanometer level, and forms a netty distribution hole structure with the nanometer holes of the support frame; and the polymer which is crossly linked layer by layer is packed on the special support frame to form a special netty micro-nano structure polymer electrolyte membrane. The polymer membrane of the micro-nano structure can absorb large numbers of electrolyte, greatly increase liquid-absorption rate, and improve the affinity of diaphragm to the electrolyte; the netty micro-nano structure leads the electrolyte to be kept in the membrane well, leads lithium ion in the polymer electrolyte membrane to be evenly distributed, leads the concentration to be to balanced, and lead the current density in the battery to be evenly when discharging electricity; and the special support frame guarantees the mechanical capability of the membrane. The preparation technology of the polymer electrolyte membrane has simple route and easily obtained raw material, can be operated under a normal condition, and does not need harsh production environment. The polymer lithium ion battery prepared by the membrane has good electrochemistry capability.
Owner:CHANGSHA HIGH TECH INDAL DEV ZONE CAISHENG NEW ENERGY TECH

Method for preparing aromatic hydrocarbons through hydrogenation of carbon dioxide

The invention provides a method for preparing aromatic hydrocarbons through hydrogenation of carbon dioxide. A gas mixture composed of carbon dioxide and hydrogen is directly converted under the catalysis of a multifunctional composite catalyst under the reaction conditions of a temperature of 250 to 450 DEG C, a pressure of 0.01 to 10.0 MPa, space velocity of 500 to 50000 mL / (h.g<cat>) and a H<2> / CO<2> mol ratio of 0.5 to 8.0 so as to produce the aromatic hydrocarbons. The composite catalyst is prepared by mixing a first component with a second component, wherein the first component is a Fe-based catalyst for preparation of low-carbon olefins through hydrogenation of carbon dioxide, and the second component is one or more than two selected from a group consisting of molecular sieves modified or unmodified by metals and mainly exerting aromatization effect on olefins. According to the method, the one-way CO2 conversion rate can reach 33% or above; the selectivity of hydrocarbon products can be controlled to be 80% or above; the content of methane in hydrocarbon products is lower than 8%; the content of C<5+> hydrocarbons is higher than 65%; and the aromatic hydrocarbons account for63% or more of the C<5+> hydrocarbons. The method opens up a novel route for production of aromatic hydrocarbons from carbon dioxide.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1

Preparation method of vilazodone or its hydrochloride

The invention discloses a preparation method of vilazodone or its hydrochloride, which comprises the following steps: the compound of formula (I) is mixed with the compound of formula (II) 5-(1 -piperazinyl)-benzofuran-2-formamide reaction, then collect vilazodone shown in formula 1 from the reaction product; Gained vilazodone 1 is in a solvent, and hydrochloric acid is salified to prepare formula (A ) shown vilazodone hydrochloride. The present invention overcomes the defects and deficiencies in the existing preparation methods of vilazodone and its intermediates, is more suitable for the large-scale industrial preparation of vilazodone hydrochloride, has obvious creativity, and has a relatively large positive progress effect and practical application value. The reaction formula is as follows:
Owner:SHANGHAI INST OF PHARMA IND

Copper mine tailing slag porous ceramic material and preparation method thereof

A copper mine tailing slag porous ceramic material comprises copper mine tailing slag, a pore-foaming agent, an adhesion agent and a fluxing agent. A preparation method comprises the steps of using the copper mine tailing slag as aggregate, adding the pore-foaming agent, the adhesion agent, the fluxing agent and water to be stirred evenly, using a mold to perform compression molding to obtain a blank, controlling the temperature and sintering through a high-temperature procedure after drying, and obtaining porous ceramics. Raw materials used by the copper mine tailing slag porous ceramic material are cheap and easy to obtain, the compression strength of the porous ceramic material can be remarkably improved and can reach to 5-25 MPa only by adding the copper mine tailing slag and a small amount of additives, and the apparent porosity can reach to 40%-65%. A large amount of beneficiation tailing slag can be utilized effectively, the environmental pollution is reduced, wastes are turned into wealth, and the prepared porous ceramic material can be used as an excellent adsorbing material and a filter material. The technical process is simple, the utilization amount of the copper mine tailing slag is large, secondary pollution is not caused, the porous ceramic material is high in compression strength and porosity, and the resource utilization of the copper mine tailing slag is achieved. The copper mine tailing slag porous ceramic material is suitable for industrial production.
Owner:CENT SOUTH UNIV

Preparation method of diatomite ceramic particles or ceramic plates

The invention relates to a preparation method of diatomite ceramic particles or diatomite ceramic plates. The preparation method of the diatomite ceramic particles comprises the following steps: grinding diatomite, adding cosolvent, mineral powder and vegetable fiber powder to mix evenly and grind; and adding water to mix, shaking to obtain diatomite ceramic particles, and roasting to obtain the finished diatomite ceramic particles. The preparation method of the ceramic plates comprises the following steps: using evenly mixed powder to perform dry pressing with a pressure forming machine, or using mud with the water content of 15-25wt% to perform extrusion forming; and roasting to obtain the diatomite ceramic plates. The formed and dried diatomite ceramic plates or diatomite ceramic particles are soaked in slurry prepared from anatase titanium dioxide nanometer powder or metatitanic acid powder and then dried and roasted to obtain diatomite ceramic particles or diatomite ceramic plates with photochemical activity. In the invention, the low temperature sintering method is adopted to prepare the diatomite diatomite ceramic plates and ceramic particles which have high diatomite content and good adsorption property and water resistance and can be combined with various functional components on the surface. The diatomite ceramic products in the invention are convenient to use and have simple production technology and cheap and easy available raw materials.
Owner:JILIN UNIV +1

Preparation method of covalent organic framework composite microspheres with core-shell structures

The invention relates to a preparation method of covalent organic framework composite microspheres with core-shell structures. The method comprises the following steps: dissolving silicon dioxide microspheres, a first construction element and a second construction element in an organic solvent; and after adding a catalyst, rapidly synthesizing into the composite microspheres with core-shell structures at a certain temperature. In a preparation process, reaction conditions are gentle, the method is simple, and the yield is high; the prepared covalent organic framework composite microspheres have the advantages of good core-shell morphology, high specific surface area, ordered pore structures, good mechanical stability, thermal stability, chemical stability and the like, if the microspheres are used as a chromatographic stationary phase, the chromatographic mass transfer resistance can be reduced effectively, the theoretical plate height is improved, and finally, column efficiency and degree of separation are improved; and if the microspheres are used as solid-phase extracting filler, the enrichment effect can be improved remarkably. The covalent organic framework composite microspheres with core-shell structures have good application prospects in the aspect of separation and enrichment of small organic molecules.
Owner:FUZHOU UNIV

Preparation of carbon nanotube material embedded with quantum-dot modified metal organic framework

The invention provides preparation of a carbon nanotube material embedded with a quantum-dot modified metal organic framework. The preparation comprises the following steps of firstly, adding a certain amount of powder quantum dots to a formed metal organic framework precursor solvent so that the quantum dots of which the diameters are matched with the sizes of pore passages are embedded into the pore passages of the formed metal organic framework; secondly, uniformly mixing the obtained quantum-dot modified metal organic framework and melamine powder, and performing high-temperature processing to obtain a composite material (QD / UMCM-1@CNT) in a carbon nanotube embedded with the quantum-dot modified metal organic framework; and finally, enabling Pt to be loaded on a surface of the composite material carbon nanotube (Pt / QD / UMCM-1@CNT) by microwave radiation heating to be used as a positive electrode catalyst of a methanol fuel cell. Compared with a traditional hydrothermal method for synthesis of the carbon nanotube, the quantum-dot modified metal organic framework obtained by high-temperature processing is embedded into the composite material in the carbon nanotube, the structural aspects such as the length and the diameter of the carbon nanotube are more consistent, and a catalyst substrate with a unified structure is easier to form.
Owner:QINGDAO UNIV
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