30results about How to "Performance varies" patented technology

The invention discloses a positive electrode material of a high-capacity lithium ion battery and a preparation method of the positive electrode material. The preparation method comprises the following steps: dissolving raw materials into de-ionized water to prepare a mixed solution A and a mixed solution B, which have the same volume and different concentrations; adding a sodium hydroxide solution and an ammonia water solution into a container C in a parallel flow manner to be subjected to co-precipitation, so as to prepare a co-precipitate Ni1-x-yCoxAly(OH)2+y precursor; after ageing, filtering, washing and drying the prepared co-precipitate precursor, uniformly mixing the co-precipitate precursor with a lithium source; pressing and molding mixed materials, putting the mixture into a pipe furnace for presintering, and sintering the mixture in an oxygen / oxygen-enriching air airflow to obtain a target product. The positive electrode material of the lithium ion battery, provided by the invention, has no impure phases and has high crystallization quality; the product has a uniformly-distributed grain diameter and a regular spherical shape, and has a very high specific discharge capacity and relatively excellent circulating stability; the positive electrode material can meet high-energy density and high-power charging and discharging requirements, a process is simple and a manufacturing cost is relatively low.

The invention relates to a preparation method of a Sn-base composite solder sheet based on a porous Ni / Cu alloy. The preparation method comprises the steps that first of all, a layer of Cu is preparedon the surface of porous Ni metal, and then high-temperature sintering is carried out, so that mutual diffusion between Ni and Cu is facilitated, and bonding of Ni and Cu is further tight; and then the porous Ni / Cu alloy is immersed into the molten Sn-base solder, and finally is rolled into a foil. In the porous Ni / Cu alloy subjected to high-temperature sintering treatment, the bonding strength of Ni and Cu is higher and the oxidation resistance is better through the mutual diffusion between Ni and Cu, and the relatively high strength, good plasticity, high corrosion resistance and high ductility are shown. Along with change of sintering parameters and electroplating parameters, concentration distribution gradients of Ni and Cu in the porous Ni / Cu alloy are different, reaction between theporous Ni / Cu alloy and the Sn-base solder is rapider in the brazing process, and the soldering reliability is high.

The invention belongs to the technical field of modified inorganic nanometer functional materials and discloses a novel nano-fluid and its preparation method and an application thereof. The preparation method comprises the following specific steps: dissolving inorganic nanoparticles in water, adjusting pH to alkaline by adding alkali, carrying out ultrasound, adding the inorganic nanoparticle solution into a silane coupling agent ethanol solution to react for 4-48h so as to obtain a nanoparticle solution containing epoxy functional groups; adding tertiary amine and hydrochloric acid to react for 1-48h, adding polyoxyethylene ether sulfonate to react for 1-48h, and purifying to obtain the novel nano-fluid. The novel nano-fluid is a fluid-like shape. Processability of nanoparticles is raised. The novel nano-fluid also can be used as a special solvent and a reaction medium. The preparation method is simple and easy to operate. Modified nanoparticles will not be agglomerated. Physicochemical properties of nanoparticle kernel are still retained, and nano-fluids with different properties can be obtained by adjusting the type of inorganic nanoparticles and polymerization degree of polyoxyethylene ether sulfonate.

The invention relates to a manufacture method for electric conductive polyaniline that is made from aniline monomer taking oxidative polymerization. The feature is that cyclodextrin is added during the oxidative polymerization process, and the mol ratio of aniline monomer and cyclodextrin is 1: (0.1-1.2). The method is easy to operate and has environment protection process.

The invention belongs to the metal material field, in particular to a hexagonal soft magnetic ferrite material that can be sintered at a low temperature directly. The invention is characterized in that the invention adopts Bi2O3 as one of the constituent, and replaces Ba2+ with Bi3+, and divalent metal Me2+ with Fe3+ to balance the overall electricity price. The crystal phase of the hexagonal soft magnetic ferrite material is Y-type hexagonal ferrite, and the molecular formula is Ba2-xBixMe2+xFe12-xO22, 0<x<0.5. Me is one or several types of Co, Zn, Cu, Mg, Mn, and Ni. The material has the advantages of low sintering temperature, wide sintering temperature, simple production method, application to industrialized production, stable performance, high reliability, and high indexes of performance. The magnetic conductivity of sintered samples is 2-30, cut-off frequency 500MHz-8GHz, temperature change rate not above 10-6 / DEG C, resistance rate above 108 ohm is multiplied by cm, and dielectric coefficient 10-20, which meet and even exceed requirements on magnetic medium by sensing components such as UHF inductance and piece magnetic bead, and various combined piece components.

The invention discloses a degradable photocurable resin and a preparation method thereof. The photocurable resin comprises 40 to 90 parts by weight of a degradable (methyl)acrylate prepolymer, 10 to 60 parts by weight of a small molecule (methyl)acrylate reactive diluent and 0.5 to 3 parts by weight of a photoinitiator. The degradable photocurable resin has the ability to degrade under the conditions of acid, alkali, neutral and biological enzyme, and can be applied to the fields of coating, biomedicine, 3D printing and the like.

The invention discloses a preparation method of a carbon-dioxide-base polyurea high polymer material, belonging to the technical field of preparation of high polymer materials. The method solves the problem that the carbon-dioxide-base polyurea in the prior art can not satisfy the requirements, and widens the application range of the carbon-dioxide-base polyurea. The preparation method comprises the following step: polymerizing amino-terminated polyurea oligomer with a chain extender, an epoxy resin, an alkyd resin, a phenol formaldehyde resin, a urea-formaldehyde resin or other active-terminated oligomers to obtain the carbon-dioxide-base polyurea high polymer material. The structural formula of the amino-terminated polyurea oligomer is disclosed as Formula I. The preparation method is green and environment-friendly, has the advantages of no pollution, simple technique, favorable atomic economical efficiency and wide application range, can prepare high polymer materials with various properties through further reaction between amino-terminated polyurea oligomers with different structures and different substrates, and is suitable for multiple purposes.

The invention discloses a low temperature synthetic method for lithium vanadate with long service life, which comprises the following steps: firstly, reacting a lithium compound and a vanadium compound in water for 0.5 to 10 h at the temperature of room temperature to 90 DEG C according to the molar ratio (0.9 to 1.1) of a lithium ion and a vanadium ion, wherein the weight ratio of the water and a solid mixture is (1 to 10):1; secondly, drying the product prepared in the step 1 at the temperature of room temperature to 120 DEG C, wherein the drying time is 1 to 24h; and thirdly, annealing for 0.5 to 5h at the temperature of 100 to 400 DEG C. The invention has the advantages of accurate composition, long cycle life, controllable electrochemical performance, easy adulteration, cladding and other decorations, simple preparation method and low flow energy consumption.

The invention relates to a poly (alkene carbonate) diol-polylactic acid segmented copolymer and a preparation method thereof. A copolyester of the invention is a segmented copolymer generated from ring-opening copolymerization of poly (alkene carbonate) diol with a weight-average molecular weight of 500-10000g / mol and lactide. Specifically, the preparation method comprises the steps of: subjecting a previously fully dried reactant and lactide as well as a ring-opening catalyst to a vacuum-pumping-nitrogen charging metathesis operation in a container for 5-10 times, then pumping high vacuum to a pressure of 5-15Pa, raising the temperature to a range of 110-180DEG C, and leaving the reaction to proceed for 6-72h, thus finally obtaining the poly (alkene carbonate) diol-polylactic acid segmented copolymer of high molecular weight. Wherein, the reactant can be one or more of poly (ethylene carbonate) diol, poly (propylene carbonate) diol and poly (butylene carbonate) diol. According to the invention, the technological operation is simplified. The chain segment length of a final product and the molecular weight of the copolymer can be adjusted by controlling the molecular weight and the adding amount of the poly (alkene carbonate) diol so as to obtain copolyesters of different performances.

The invention discloses polyamide imide which is obtained by the exchange of terminal groups. The structural general formula of the polyamide imide is showed on the right, wherein, X in the formula is the remanent part of diisocyanate removed diisocyanato; the R' is the remanent structure of a compound containing active hydrogen removed hydrogen and the limiting viscosity number thereof is 0.1dL / g to 0.4dL / g. The invention also discloses a preparation method of the polyamide imide. As the polyamide imide provided by the invention which is obtained by the exchange of terminal groups not only has a great variety of terminal groups, thus being capable of obtaining polyamide imide which cannot be obtained through direct terminating method, but also has a higher molecular weight, stable storage and is characterized by simple preparation and low cost, and the polyamide imide disclosed by the invention can greatly widen the application range of the polyamide imide.

The present invention discloses a composite positive osmosis membrane and a preparation method thereof, wherein the positive osmosis membrane is formed by compounding a polymer and graphene compositelayer and a highly porous substrate lower layer, the polymer is a copolymer formed by carrying out free radical polymerization on an isopropyl acrylamide monomer and a N,N-methylene diacrylamide monomer, the highly porous substrate is a porous aromatic polymer film, a mass ratio of the two monomers is 1:9-9:1, and the mass of the graphene is 2.5-70% of the mass of the copolymer. The preparation method comprises precursor solution preparation, film coating, heat treatment, and other steps. The positive osmosis membrane of the present invention has high water flux and high salt rejection rate.

The invention discloses a ferrocenyl benzoxazine-containing monomer or precursor and its preparation method as well as a ferrocenyl benzoxazine-containing resin prepared by thermal curing of the monomer or precursor. The preparation method provided by the invention comprises the following steps of: mixing and dissolving 1-400 wt% of reactants and organic solvents in a reactor while the temperature is controlled within 40-130 DEG C and the reaction lasts for 0.5-24 hours; washing a purification product by the use of an alkaline solution at the concentration of 0.01mol / L-5mol / L, washing the product to neutral by the use of pure water, removing the organic solvents, and drying to prepare the ferrocenyl benzoxazine-containing monomer or precursor. The ferrocenyl benzoxazine-containing resin is obtained by the heating, ring-opening and curing molding of the monomer or precursor. The monomer or precursor has low curing temperature, has a self-catalysis curing function, is widely applied, and can undergo crossing and curing under the heating condition without a catalyst and with no release of micromolecules. The cured ferrocenyl benzoxazine-containing resin has high temperature resistance and electromagnetic properties, and has an application prospect in the aspects of high temperature ceramics, electrochemical induction, high dielectric materials, magnetic ceramic body and the like.

The invention relates to a poly(alkene carbonate) diol-polybutylene succinate copolymer and a preparation method thereof. The copolymer is formed by randomly copolyesterifying 6 to 120 poly(alkene carbonate) diol molecules and 5 to 180 polybutylene succinate molecules. The preparation method adopts a direct melt polycondensation method, and comprises the steps of: esterifying 1, 4-butanediol, butane diacid and stannous chloride in a reaction kettle first, and then adding titanium tetraisopropylate into the reaction kettle to react for 1 to 8 hours to obtain a polybutylene succinate oligomer; and performing a melt copolycondensation reaction on a reactant, the polybutylene succinate oligomer and a catalyst to obtain a poly(alkene carbonate) diol-polybutylene succinate random copolymer, wherein the reactant is poly(ethylene carbonate) diol, poly(propylene carbonate) diol or poly(butylene carbonate) diol. The method simplifies process operation, and can adjust the block length of a final product and the molecular weight of the copolymer by controlling the molecular weight and the adding amount of the poly(alkene carbonate) diol to obtain copolyesters with different performances.

The invention discloses a long-acting organic mixed fertilizer. The long-acting organic mixed fertilizer comprises the following ingredients in percentages by weight: 31-40% of pig manure, 13-19% of straw powder, 9-17% of earthworm manure, 11-21% of a cake fertilizer, 9-14% of kieselguhr, 4-6% of a seaweed extract and 1-4% of a nitrogen-phosphorus-potassium fertilizer. The various ingredients are proportioned in different percentages by weight, so that the obtained products are different in performances, thus obtaining different use effects; the proportions of the various raw materials are adjusted according to the differences of the needed nutrients in soil, thus ensuring that crops obtain enough nutrients during growth processes and ensuring the healthy growth of the crops.

The invention discloses a spiral-structure string and a manufacturing method thereof. The spiral-structure string is composed of a core string, collodion silks and an outer wrapping string. The core string and the collodion silks are intertwined and wrapped by the outer wrapping string to form the spiral-structure string. In braiding of the spiral-structure string, thickness and colors of peripheral yarns can be changed to achieve bright and colorful appearance. In addition, thickness and hardness of the core string and amount and positions of the collodion silks can be changed to form spiral-structure strings with different performances. The spiral-structure string is widely applicable to decorations of shoes, hats, clothes, households, bags and the like, and accordingly high attractiveness is realized.

The invention discloses an isotropic crosslinking beta-cyclodextrin / tungsten carbide composite microsphere and a preparation method thereof. The preparation method comprises the following steps: firstly, beta-cyclodextrin is dissolved into a sodium hydroxide aqueous solution, and the mixture is dripped with epichlorohydrin and undergoes stirring reaction under heating condition, so as to generateviscose; secondly, the viscose is added with tungsten carbide powder, oil dispersed phase and a dispersant under the condition of mechanical stirring to form a reversed phase suspension dispersion system; thirdly, the epichlorohydrin is added into the reversed phase suspension dispersion system, and the composite microsphere is obtained after mechanical stirring reaction; and fourthly, after the reversed phase suspension dispersion system is cooled, the composite microsphere is filtered, cleaned and neutralized, and subjected to wet sieving and expanded bed floatation. The composite microsphere developed by the method has the advantages of good hydrophilicity and sphericity, stable properties, low cost, high density, easy adjustment and so on, and can be used as a substrate during the process of expanded bed absorption as shown by an expanding performance test experiment.

The invention belongs to the metal material field, in particular to a hexagonal soft magnetic ferrite material that can be sintered at a low temperature directly. The invention is characterized in that the invention adopts Bi2O3 as one of the constituent, and replaces Ba2+ with Bi3+, and divalent metal Me2+ with Fe3+ to balance the overall electricity price. The crystal phase of the hexagonal soft magnetic ferrite material is Y-type hexagonal ferrite, and the molecular formula is Ba2-xBixMe2+xFe12-xO22, 0 H01F 1 / 34 C04B 35 / 26 C04B 35 / 64 1 4 1 2007 / 6 / 14 101106004 2008 / 1 / 16 000000000 University of Science and Technology Beijing Beijing 100083 Bai Yang Qiao Lijie Xu Fang luzhong qiang 11207 The Patent Agency of Beijing University of Science and Technology No.30 Xueyuan Road, Beijing 100083

The invention discloses a semiconductor vortex light laser based on topological photons, which belongs to the field of optoelectronic devices. The laser sequentially comprises a p electrode layer, a p-type ohmic contact layer, a two-dimensional photon topological structure layer, a refractive index guide layer, an active layer, an n-type ohmic contact layer and an n electrode layer from top to bottom. The two-dimensional photon topological structure is composed of a photonic crystal array with a photon spin-orbit coupling effect, each photonic crystal is formed by alternately stacking voltage layers and magnetic pressure layers, and vortex laser beams are generated through interaction of the two-dimensional photon topological structure on a light field in the active region. The spinning characteristic of laser output is changed through a two-dimensional topological photonics structure, and high-integration vortex laser output is effectively achieved.

The invention relates to a titanium-based gradient lead dioxide composite electrode material for copper electrodeposition and a preparation method thereof, and belongs to the technical field of wet metallurgy anode plates. The titanium-based gradient lead dioxide composite electrode material for copper electrodeposition sequentially comprises a titanium substrate, a Sn-Ru-Ta-ZrOx oxide bottom layer, a beta-PbO2-nano SnO2 middle layer, an alpha-PbO2-copper coated graphite powder transition layer and a beta-PbO2-nano ZrN-cobalt coated hollow glass bead active layer from inside to outside. The invention further provides a preparation method of the titanium-based gradient lead dioxide composite electrode material for copper electrodeposition. The electrode material provided by the invention is applied to electrodeposited copper, and in an electrolytic copper solution which does not contain cobalt ions but contains manganese chloride ions, compared with a traditional Pb-0. 06wt% Ca-1.2wt% Sn anode, the cell voltage can be reduced by 480mV, the service life is prolonged by more than 3 times, the current efficiency is improved by more than 5%, and the current density can be increased to more than 2 times of the original current density.

The invention relates to a manufacture method for electric conductive polyaniline that is made from aniline monomer taking oxidative polymerization. The feature is that cyclodextrin is added during the oxidative polymerization process, and the mol ratio of aniline monomer and cyclodextrin is 1: (0.1-1.2). The method is easy to operate and has environment protection process.

The polyamide-imide obtained by end group exchange disclosed by the present invention has a general structural formula as follows: In the formula, X is the remaining part of the diisocyanate after removing the diisocyanate group, and R' is the active hydrogen-containing The remaining structure of the compound after removing hydrogen has an intrinsic viscosity of 0.1 to 0.4 dL / g. The invention also discloses a method for preparing the polyamide-imide. Because the polyamide-imide obtained by end group exchange provided by the present invention not only has a wide variety of end groups, but also can obtain polyamide-imide that is difficult to prepare by direct end-capping method, and has higher molecular weight, stable storage, and convenient preparation. The cost is low, thus greatly expanding the scope of use of polyamide-imide.

The invention relates to a preparation method of a Sn-base composite solder sheet based on a porous Ni / Cu alloy. The preparation method comprises the steps that first of all, a layer of Cu is preparedon the surface of porous Ni metal, and then high-temperature sintering is carried out, so that mutual diffusion between Ni and Cu is facilitated, and bonding of Ni and Cu is further tight; and then the porous Ni / Cu alloy is immersed into the molten Sn-base solder, and finally is rolled into a foil. In the porous Ni / Cu alloy subjected to high-temperature sintering treatment, the bonding strength of Ni and Cu is higher and the oxidation resistance is better through the mutual diffusion between Ni and Cu, and the relatively high strength, good plasticity, high corrosion resistance and high ductility are shown. Along with change of sintering parameters and electroplating parameters, concentration distribution gradients of Ni and Cu in the porous Ni / Cu alloy are different, reaction between theporous Ni / Cu alloy and the Sn-base solder is rapider in the brazing process, and the soldering reliability is high.

The invention discloses a ferrocenyl benzoxazine-containing monomer or precursor and its preparation method as well as a ferrocenyl benzoxazine-containing resin prepared by thermal curing of the monomer or precursor. The preparation method provided by the invention comprises the following steps of: mixing and dissolving 1-400 wt% of reactants and organic solvents in a reactor while the temperature is controlled within 40-130 DEG C and the reaction lasts for 0.5-24 hours; washing a purification product by the use of an alkaline solution at the concentration of 0.01mol / L-5mol / L, washing the product to neutral by the use of pure water, removing the organic solvents, and drying to prepare the ferrocenyl benzoxazine-containing monomer or precursor. The ferrocenyl benzoxazine-containing resin is obtained by the heating, ring-opening and curing molding of the monomer or precursor. The monomer or precursor has low curing temperature, has a self-catalysis curing function, is widely applied, and can undergo crossing and curing under the heating condition without a catalyst and with no release of micromolecules. The cured ferrocenyl benzoxazine-containing resin has high temperature resistance and electromagnetic properties, and has an application prospect in the aspects of high temperature ceramics, electrochemical induction, high dielectric materials, magnetic ceramic body and the like.

The invention relates to a method for preparing a light porous inorganic gelled material product from gel particles. The method comprises the following steps of: preparing pore former particles of which the particle sizes are between 0.5 and 5 millimeters from a natural linear polysaccharide polymer and a gelled cross-linking agent; and doping the pore former particles separately or together withexpanded perlite particles and polystyrene foam particles into an inorganic gel material in a compounding mode according to different proportions so as to obtain the light porous material product. The volume density, intensity, pore size and density distribution of the material can be conveniently adjusted by altering the particle size and mixing amount of the pore former particles. The heat conductivity coefficient of the prepared light porous material is only between 0.12 and 0.17 w / m.k and high heat preserving performance and high heat insulating performance are achieved. The material can be used for molding and manufacturing materials having requirements on light weight, heat preservation, heat insulation, sound insulation, energy conservation and the like. The preparation method has the advantages of simpleness, safety, low energy consumption and easy control and adjustment.

The invention discloses a block copolymer obtained by ring-opening copolymerization of 6,7-dihydro-5H-oxepin-2-ketone (DHO) series unsaturated lactone and lactide, and a preparation method thereof. The invention induces a DHO series unsaturated monomer into a main chain of polylactic acid to obtain an unsaturated polylactic acid block copolymer with a main chain containing a carbon-carbon double bond, and can induce a branch chain with appropriate length on the main chain of the polylactic acid by utilizing the carbon-carbon double bond with reactivity, which has great significance for improving the melt strength and processability of polylactic acid material. In addition, the preparation method of the unsaturated polylactic acid block copolymer has simple operation process, low synthesistemperature, and can adjust the chain length of each component in the unsaturated polylactic acid block copolymer and the molecular weight of the copolymer by controlling the adding amount of each reactant so as to obtain the unsaturated polylactic acid block copolymers with different properties.

The invention belongs to the technical field of modified inorganic nanometer functional materials and discloses a novel nano-fluid and its preparation method and an application thereof. The preparation method comprises the following specific steps: dissolving inorganic nanoparticles in water, adjusting pH to alkaline by adding alkali, carrying out ultrasound, adding the inorganic nanoparticle solution into a silane coupling agent ethanol solution to react for 4-48h so as to obtain a nanoparticle solution containing epoxy functional groups; adding tertiary amine and hydrochloric acid to react for 1-48h, adding polyoxyethylene ether sulfonate to react for 1-48h, and purifying to obtain the novel nano-fluid. The novel nano-fluid is a fluid-like shape. Processability of nanoparticles is raised. The novel nano-fluid also can be used as a special solvent and a reaction medium. The preparation method is simple and easy to operate. Modified nanoparticles will not be agglomerated. Physicochemical properties of nanoparticle kernel are still retained, and nano-fluids with different properties can be obtained by adjusting the type of inorganic nanoparticles and polymerization degree of polyoxyethylene ether sulfonate.

The invention discloses a novel construction steel bar sleeve. The novel construction steel bar sleeve comprises a sleeve body, a steel bar mechanical connecting hole, a slurry outlet and a grouting opening, the whole sleeve body is of a cylindrical structure, and the outer surface of the sleeve body is of a concave-convex structure; the steel bar mechanical connecting hole is formed in the left end of the sleeve body, and the steel bar mechanical connecting hole is of a through hole structure; the slurry outlet is formed in the left side of the upper end of the sleeve body; and the grouting opening is formed in the right side of the upper end of the sleeve body, the steel bar mechanical connecting hole is a threaded hole which is connected with the sleeve body after a steel bar is threaded, and the steel bar mechanical connecting hole is formed in the left end of the sleeve body in an embedded mode. The novel construction steel bar sleeve is manufactured by machining high-quality carbon structural steel, the performance of raw materials is improved through hot forging and pressing, the plane precision is guaranteed through numerical control cutting, the situation that the material properties are different due to uneven heat treatment is prevented through cooling liquid drilling, and finally rust-proof treatment is carried out, so that the novel construction steel bar sleeve is more stable, more reliable, better in performance and higher in machining size precision.