19results about How to "No reunion" patented technology

A production device for producing modified magnesium hydroxide without coarse particles comprises a semi-finished product bin (1), a first spiral reamer (2), a modification main machine (3), a cooling machine (4), an airflow powder screening machine (5), a pulse cloth bag collector (6), an induced draft fan (7), a second spiral reamer (8), a packaging machine (9), a modifier feeding port (10), a base (11), a stirring blade (12), a dust removal cloth bag (13) and a discharging port switch (14). According to the device disclosed by the utility model, the modification main machine and the airflow powder screening machine are arranged in a matched manner, the modification main machine solves the problem of modification temperature, and the airflow powder screening machine solves the problem of powder screening; the modified superfine magnesium hydroxide finished product is good in dispersing performance, free of agglomeration and excellent in flame retardant property and mechanical property; and airflow powder screening is not prone to blockage, high in screening efficiency and large in yield. The device is suitable for producing modified magnesium hydroxide without coarse particles.

This invention relates to an insulating oil and an oil-paper insulation system containing superhydrophobic nanoparticles, as well as their preparation method and application, belonging to the field of electrical equipment insulation technology. This invention provides an insulating oil containing superhydrophobic nanoparticles, wherein the superhydrophobic nanoparticles are silane-modified nanoparticles, and the nanoparticles include at least one of SiO2, TiO2, and h-BN; the insulating oil includes at least one of mineral insulating oil, synthetic insulating oil, and natural ester insulating oil. This invention achieves the superhydrophobicity of the nanoparticles and good compatibility with the oil phase through silane modification. Adding silane-modified nanoparticles to the insulating oil effectively reduces the water content of the insulating oil and optimizes the interfacial performance of the oil-paper. Combined with the low-temperature, high-efficiency, and uniform rapid impregnation process of this invention, the overall electrical performance and service life of the oil-paper insulation system are significantly improved.

The invention discloses a lithium manganate positive electrode material, a preparation method and an applied lead-lithium battery, relates to the technical field of lithium manganate positive electrode materials, and solves the problems that the existing lithium manganate positive electrode material is poor in structure and interface stability and poor in rate and cycle performance. The positive electrode material is composed of a lithium manganate matrix and a double-layer composite coating, the matrix is prepared by taking lithium carbonate and manganous-manganic oxide as raw materials and doping magnesium hydroxide, aluminum hydroxide and titanium dioxide multi-plasma phase; the lithium manganate positive electrode material is prepared by uniformly compounding a lithium manganate matrix modified by a spinel inner layer, vinyl functionalized MOF and a polyvinylidene fluoride-hexafluoropropylene copolymer on the surface of an aluminum foil receiver through an electrospinning-electrospray synergistic process. The material is applied to the lead-lithium battery, shows excellent electrochemical performance and has good practical application value.

The application provides a high-thermal-conductivity diamond / copper composite material and an SPS sintering process thereof, raw material pretreatment: selecting three kinds of monocrystalline diamond particles with different particle sizes, mixing the titanium-plated diamond obtained after vacuum titanium plating treatment; solid dry powder mixing: uniformly mixing a solid additive and graphene modified copper powder to prepare a copper-based composite dry powder; nitrogen intermittent airflow suspension dispersion: adding the titanium-plated diamond into a sealed covering tank to make the titanium-plated diamond suspended and dispersed in the sealed covering tank; atomization covering makes the copper-based composite dry powder uniformly covered on the surface of the titanium-plated diamond to obtain composite particles; vacuum low-temperature degreasing to obtain the composite particles after degreasing, and SPS sintering demolding to obtain the high-thermal-conductivity diamond / copper composite material. The coating is uniform and dense, has no exposure and no agglomeration, and significantly reduces porosity and interface thermal resistance; the proportioning is accurate, the degreasing is thorough, and there is no residue; the generation of brittle phases is inhibited, and the interface combination is excellent; the thermal conductivity is stable and greater than 700 W / (m*K), and the density is greater than or equal to 99%.

The application discloses a kind of high tough AlSi10MgMn alloy and preparation method thereof, the composition of high tough AlSi10MgMn alloy includes: silicon 8.0~11.0%, magnesium 0.17~0.60%, manganese 0.2~0.6%, titanium 0.08~0.40%, boron 0.004~0.018%, strontium 0.3~0.6%, rare earth metal 0.1~0.3%, unavoidable impurity less than 1%, the balance is aluminum, the aforementioned percentage is mass percentage.The high tough AlSi10MgMn alloy of the application, surface neat, the mechanical properties such as tensile strength and elongation are significantly improved;Alloy grain is fine, dispersion uniform, no aggregation, no burning loss;Preparation method is simple and easy to operate.

The invention relates to the technical field of nano materials, in particular to a preparation method of a Zn-based bimetal MOFs material and application of the Zn-based bimetal MOFs material as a medical drug carrying material. The preparation method comprises the following steps: preparing Zn, Mn and a ligand according to a molar ratio of 1: 1: (72-80), and mainly comprises the steps of preparation of metal salt solutions, coordination polymerization reaction, separation and purification, and drying. The process for preparing the Zn-based bimetallic MOFs material is simple and environmentally friendly, the obtained product has the excellent performance of being small in particle size, regular and stable, and the material loaded with doxorubicin hydrochloride has high loading rate and has potential clinical conversion value.

The application belongs to the field of high polymer materials, and particularly discloses a modified basic magnesium carbonate and a PA12 composite material and a preparation method thereof.The preparation method of the modified basic magnesium carbonate comprises the following steps: adding sodium carbonate and magnesium chloride into a sodium hydroxide solution to perform a water bath reaction to obtain the basic magnesium carbonate; adding the basic magnesium carbonate and acrylic acid into deionized water to perform a water bath reaction to obtain acrylic acid modified basic magnesium carbonate; and adding the acrylic acid modified basic magnesium carbonate, glycidyl methacrylate and an initiator into an organic solvent aqueous solution to perform a water bath reaction to obtain the modified basic magnesium carbonate.The modified basic magnesium carbonate prepared by the application can decompose and absorb heat at high temperature, release water vapor and carbon dioxide and other non-combustible gases, dilute the oxygen concentration on the surface of the combustion object, and reduce the temperature of the combustion area, so as to play a role in flame retardation.In addition, the magnesium oxide produced by decomposition covers the surface of the material to form a protective layer, and further prevents the combustion.

The application provides a carbon-based gallium monatomic material for electrocatalytic oxygen reduction synthesis of hydrogen peroxide, the carbon-based gallium monatomic material is composed of carbon atoms, oxygen atoms and gallium atoms, does not contain gallium oxide form, has a Ga-O-C structure, and the three atoms are uniformly distributed; the gallium atoms and the oxygen atoms are bonded in the form of a covalent bond, and the oxygen atoms are bonded with the carbon atoms; the gallium atoms are uniformly dispersed on the carbon-based base material in the form of monatomic atoms. The carbon-based gallium monatomic material provided by the technical scheme of the application is used for electrocatalytic oxygen reduction synthesis of hydrogen peroxide, only C, O and Ga three elements are present in the prepared carbon-based gallium monatomic material, and the three elements are uniformly distributed in the form of monatomic atoms and are free of agglomeration and crystallization, the carbon-based gallium monatomic material has high conductivity of carbon material, overcomes the defects that a homogeneous catalyst is unstable and is prone to agglomeration, and simultaneously, compared with other heterogeneous catalysts in the prior art, the catalytic selectivity has good controllability and the catalytic selectivity is greater than 90%.

The invention discloses a method and a device for synthesizing lithium sulfide with a controllable particle size. The method comprises the following steps: S1, dissolving lithium sulfide; performing evaporation concentration and low-temperature drying to obtain a lithium hydrosulfide powder raw material; s2, introducing high-purity hydrogen sulfide gas into a crushing and mixing chamber, and further crushing and fully mixing under strong impact of high-speed jet flow; s3, performing vulcanization reaction through the fluidized bed reaction chamber to obtain high-purity lithium sulfide particles; and S4, after synthesis is completed, transferring into a glove box. Compared with the prior art, the method disclosed by the invention has the advantages that the ethanol is adopted as a solvent, the uniformity of a lithium sulfide initial blank shell can be ensured to the greatest extent through a recrystallization method, and the high-quality lithium sulfide with controllable particle size can be obtained more quickly by accurately controlling the pressure of high-speed jet flow and regulating and controlling the particle size of a precursor material through the crushing and mixing chamber; the purity is higher, the particle size distribution is more uniform, the operation process is simple, convenient and feasible, and the method is suitable for large-scale industrial production.

This application discloses a steel pipe jacking core filling material and its preparation method. The raw materials of the steel pipe jacking core filling material in this application include gel material, coarse aggregate, fine aggregate, wetting and dispersing agent, and water. The weight of the wetting and dispersing agent is 1.0-1.5% of the total mass of the gel material. The wetting and dispersing agent is compounded from maleic anhydride copolymer and organic bisacrylic surfactant. The cementing material includes cement, mineral powder, and fly ash. The molecular structure of the maleic anhydride copolymer is comb-shaped. The molecular weight of the main chain of the maleic anhydride copolymer is 5000-100000 g / mol, and the molecular weight of the side chain of the maleic anhydride copolymer is 100-500 g / mol. The molecular structure of the organic bisacrylic surfactant is comb-shaped. The molecular weight of the main chain of the organic bisacrylic surfactant is 5000-100000 g / mol, and the molecular weight of the side chain of the organic bisacrylic surfactant is 2000-5000 g / mol. The filler material in this application has better fluidity and density properties, and better volume stability, which can meet the dual requirements of mechanical properties and durability of lifting filler materials.

The invention discloses a tulobuterol transdermal patch with a gradient drug release structure and a preparation method of the tulobuterol transdermal patch, belongs to the technical field of transdermal drug delivery systems, and aims at solving the problems that an existing single-layer tulobuterol patch takes effect slowly and is insufficient in later-stage drug release power. The transdermal patch sequentially comprises a backing layer, a gradient medicine-containing substrate layer and an anti-sticking release layer from top to bottom, the gradient drug-containing matrix layer comprises a high-concentration top long-acting drug release layer containing tulobuterol-mesoporous silica nanoparticles and a silicone adhesive, a middle-concentration middle stable drug release layer containing an SIS hot melt adhesive, and a low-concentration bottom quick-acting contact layer containing a specific penetration enhancer composition and an acrylate adhesive from top to bottom in sequence. Through the synergistic effect of bottom-layer penetration promoting driving, middle-layer stable transition and top-layer nanometer storage cavern relay, the traditional concentration barrier is broken through, and rapid effect taking within 1-2 hours and stable-state long-acting drug release within 24 hours or above are perfectly considered.

The invention discloses a surface coating process of a main shaft for a numerical control machine tool, and relates to the technical field of coating of main shafts of numerical control machine tools, and the surface coating process comprises the following steps: carrying out soft sand blasting on the main shaft, fixing the main shaft on a sand blasting table, carrying out 0.2 MPa low-pressure sand blasting for 3 minutes by using modified starch microspheres as a sand blasting medium, and cleaning the surface of the main shaft by using deionized water at 60 DEG C, fixing the main shaft in a suspension manner by using an elastic polyurethane clamp, putting the main shaft into a PVD vacuum coating chamber, and mounting a composite target material, a chromium target and a high-purity graphite target; modified starch microspheres are used as a soft sand blasting abrasive material, a soft matrix of the modified starch microspheres has excellent elasticity and plastic deformation capacity, the surface texture consistency of the spindle is guaranteed, and matrix microcracks and precision damage caused by a traditional hard abrasive material are avoided; by using the composite target material, a composite ceramic phase formed by nuclear phase zirconium dioxide and titanium dioxide has high hardness and excellent toughness, and the impact resistance of a subsequent coating can be enhanced through a stress buffer effect.

This invention belongs to the field of refractory materials technology, and relates to a high-strength nano-polycrystalline spraying material for non-ferrous metal smelting furnaces and its preparation method. The high-strength nano-polycrystalline spraying material comprises the following raw materials in parts by weight: 30-45 parts high-purity fused magnesia, 15-20 parts fused magnesia-chromium sand, 5-7 parts fused chromium corundum, 10-20 parts polycrystalline nano-magnesium oxide, 3-5 parts CA-80 type calcium aluminate cement, 3-5 parts silica sol, 8-15 parts chromium oxide micropowder, and 2-3 parts sodium carboxymethyl cellulose. After spraying onto copper smelting anode furnaces (Kaldor furnaces), the corrosion resistance, thermal shock stability, and service life are improved.

The application discloses a preparation method of silicon nitride nano-powder, relates to the technical field of inorganic non-metallic nano-material preparation, and is characterized by a direct nitriding reaction link of silicon vapor and nitrogen plasma. The method uses high-purity silicon vapor prepared by an existing process as raw material, introduces the high-purity silicon vapor into a nitrogen plasma reaction area, and under specific process conditions, the silicon vapor and the nitrogen plasma rapidly generate a nitriding reaction to form a silicon nitride nano-particle precursor. After condensation, collection and simple subsequent treatment, high-purity silicon nitride nano-powder is obtained. The core reaction link of the application does not need to prepare a solid silicon powder intermediate, has high reaction efficiency, high product purity and good dispersity, solves the problems of easy agglomeration and high impurity content of silicon nitride powder in the prior art, and the product can be applied to high-end fields such as high-temperature structural ceramics and semiconductor packaging.

The application discloses praseodymium-neodymium oxide and a preparation method thereof. The preparation method comprises the following steps: 1) adding a praseodymium-neodymium chloride solution and ammonia water into an ammonium acetate solution in a parallel flow mode, performing solid-liquid separation after the reaction is completed, and obtaining a praseodymium-neodymium oxide precursor; 2) performing calcination on the praseodymium-neodymium oxide precursor, and obtaining praseodymium-neodymium oxide. The praseodymium-neodymium oxide has a porous sheet structure. The praseodymium-neodymium oxide with the porous sheet structure can be obtained by using the preparation method.

The application relates to a kind of asphalt modifier and modified color asphalt, and belongs to the technical field of compound for asphalt modification.Nano material surface has higher active group, and easy to occur self-aggregation, so that nano material is difficult to realize complete dispersion in asphalt, which influences the low-temperature performance of modified asphalt.The application uses nano silicon dioxide which is sequentially surface modified by strong alkali solution, surfactant solution, hydrolysis solution of silane coupling agent and stearic acid solution.The nano silicon dioxide surface is sequentially modified in roughness, surface activity and organicity, which significantly improves the dispersibility of inorganic nano modifier in asphalt, avoids nano particle aggregation, limits high-temperature fluidity, and improves the high and low temperature performance of color asphalt.

This invention discloses an Al-Bi-Sn immiscible alloy and its rotational deposition solid-state additive manufacturing method, belonging to the fields of metal composite materials and solid-state additive manufacturing technology. In this invention, the Al-Bi-Sn immiscible alloy is, by atomic percentage (at.%), Al 100‑x‑ y Bi x Sn y The alloy is prepared by rotational deposition solid-phase additive manufacturing method, where x = 8~15, y = 7~20, and x+y = 15~35. By controlling the component ratio and microstructure, the present invention achieves uniform composite of BiSn solid solution matrix and Al phase particles, with no particle agglomeration, high density, and excellent hardness and self-lubricating wear resistance, which can directly meet the application requirements of lightweight wear-resistant components such as automotive bearings and dry friction bearings.

This invention discloses a polypropylene carbonate composite material modified with tea seed cake and its preparation method. The polypropylene carbonate composite material comprises modified tea seed cake and a polypropylene carbonate matrix, wherein the modified tea seed cake is obtained through surface modification via alkali treatment, silane coupling agent treatment, or organic acid treatment. This invention significantly improves the dispersibility and interfacial compatibility of tea seed cake, a natural biomass filler, within the polypropylene carbonate matrix by employing specific surface treatment methods. Simultaneously, by utilizing the active components of tea seed cake itself, a polypropylene carbonate composite material with significantly improved mechanical properties, thermal stability, anti-aging properties, and biodegradability is prepared, achieving high-value utilization of agricultural waste.

The invention relates to the technical field of pyrite mining, in particular to a composite flotation agent for pyrite mining and a preparation method and application thereof.The composite flotation agent is prepared from, by mass, 40-60 parts of N, N-diethyldithiocarbamate, 20-30 parts of sodium isoamyl xanthate, 5-10 parts of imidazole functionalized polystyrene nanoparticles, 8-15 parts of water glass, 2-5 parts of methyl isobutyl carbinol and 10-20 parts of deionized water. The prepared composite flotation agent is synergistic in component, high in selectivity, resistant to slime covering, low in VOCs, stable and efficient; the method is controllable in process, uniform in dispersion, high in product stability and suitable for industrial production; the method can adapt to complex sulphide ore mining, the grade and the recovery rate of pyrite concentrate are remarkably improved, and green and efficient separation is achieved.