436 results about "Nanoparticles dispersion" patented technology

An object of the present invention is to provide an infrared-shielding nanoparticle dispersion that has a property whereby visible light is adequately transmitted, and light in the near-infrared region is adequately shielded; an infrared-shielding body manufactured using the infrared-shielding nanoparticle dispersion; a method for manufacturing infrared-shielding nanoparticles that are used in the infrared-shielding nanoparticle dispersion; and infrared-shielding nanoparticles manufactured using the method for manufacturing infrared-shielding nanoparticles. The present invention is a method for manufacturing infrared-shielding nanoparticle dispersion obtained by dispersing infrared-shielding nanoparticles in a medium, an infrared-shielding body manufactured by using the infrared-shielding nanoparticle dispersion, and infrared-shielding nanoparticles used in the infrared-shielding nanoparticle dispersion, wherein the infrared-shielding nanoparticles include a substance expressed by the general formula MXAYW(1-Y)O3 (where M is one or more elements selected from H, He, alkali metals, alkaline-earth metals, rare earth elements, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi, and I; A is one or more elements selected from Mo, Nb, Ta, Mn, V, Re, Pt, Pd, and Ti; W is tungsten; O is oxygen; 0<X≦1.2; 0<Y≦1).

A method for making nanoparticles via metal salt reduction comprises, first, mixing metal salts in a solvent. Second, a reducing agent is added to the solvent at a temperature in the range of 100° C. to 350° C. Third, the nanoparticles dispersion is stabilized. Fourth, the nanoparticles are precipitated from the nanoparticle dispersion. Finally, the nanoparticles are re-dispersed into the solvent. The metal salt comprises a combination of FeCl2, FeCl3, Fe(OOCR)2, Fe(RCOCHCOR)3, CoCl2, Co(OOCR)2, Co(RCOCHCOR)2, and one of Pt(RCOCHCOR)2, PtCl2. The reducing agent comprises one of MBR3H, MH, M naphthalides, and polyalcohol; wherein R comprises one of H and an alkyl group, wherein M comprises one of Li, Na, and K. Long chain alkyl diols, and alkyl alcohol, can be used as a co-surfactant or a co-reducing agent to facilitate nanoparticle growth and separation.

The invention discloses a preparation method of a water-based super-hydrophobic or super-amphiphobic coating. Nano-particles are ultrasonically dispersed into water, the pH of the solution is adjusted to obtain a nano-particle dispersion; The silane coupling agent is hydrolyzed under stirring to obtain an organosilane polymer / nanoparticle composite suspension; and then applied to the surface of the base material by spraying or dipping to obtain a water-based superhydrophobic / superamphiphobic coating. The present invention successfully prepares a water-based super-hydrophobic or super-amphiphobic coating with excellent performance without using any additives (organic solvent, surfactant and water-based solvent), and has many advantages such as water-based environmental protection, low price and excellent performance. , It has broader application prospects in the fields of self-cleaning surface, anti-corrosion coating, oil pollution prevention and oil transportation.

The invention discloses a transparent super-hydrophobic coating material. The raw materials of the transparent super-hydrophobic coating material comprise gas-phase silica nano-particle dispersion liquid which consists of gas-phase silica nano-particles and a solvent, and a hydrophobic treating agent. The invention further discloses a preparation method of a transparent super-hydrophobic coating; a coating of a micro-nano structure is prepared by rubbing and coating a substrate with the gas-phase silica nano-particle dispersion liquid, and then the coating is subjected to surface hydrophobization treatment by the hydrophobic treating agent to obtain the transparent super-hydrophobic coating. According to the super-hydrophobic coating material provided by the invention, hydrophobization treatment manners can be changed flexibly according to the difference of coated substrates; the method for preparing the super-hydrophobic coating has low requirement on equipment; the using cost is extremely low; the method is simple; the coating application is convenient; a large-area high-efficiency super-hydrophobic coating can be prepared; the prepared super-hydrophobic has excellent super-hydrophobicity, high transparency, droplet impact resistance, temperature and pH stability, durability, and repeated rubbing and coating capacity, and can be applied to almost all currently known solid surfaces.

The variable hydraulic press and distillation reservoir process scientific formula non ionic or electrolyte mechanically refined and nanoparticle dispersion preform slurry extrusion with or without ionic suspension Preform slurry high wear-heat resistant parts electronic composite coils, windings, annealing, drawn, spun, coils, windings, wire, woven textile mesh, shielding, parts brushes, inductors, antinode couplers, electric rheostats, starters, motors, alternators, generators, ionic suspension enhanced composite coils, composite windings, spun wound coils and windings beryllium Be4, magnesium Mg12, copper Cu29 and carbon nanofoam C6, electronic parts capacitors, ionic suspension circuit battery cells, electronic parts rheostats, resistors, transformers, transducers, rectifiers, power supplies, or heat sinks Preform slurry high wear-heat resistant parts aerospace, automotive, and transportation brake calipers, rotors, pads, and bushings Preform slurry non ionic or electrolyte mechanically refined and nanoparticle high wear-heat resistant parts precision casting molds 2.5 phase die cast molding Building Materials fine concrete, mortar, brick, and tiles.

An optically reliable high refractive index (HRI) encapsulant for use with Light Emitting Diodes (LED's) and lighting devices based thereon. This material may be used for optically reliable HRI lightguiding core material for polymer-based photonic waveguides for use in photonic-communication and optical-interconnect applications. The encapsulant includes treated nanoparticles coated with an organic functional group that are dispersed in an Epoxy resin or Silicone polymer, exhibiting RI˜1.7 or greater with a low value of optical absorption coefficient α<0.5 cm−1 at 525 nm. The encapsulant makes use of compositionally modified TiO2 nanoparticles which impart a greater photodegradation resistance to the HRI encapsulant.

The invention relates to the technical field of nano materials and specifically relates to amino-modified silica with dual drug-loading effects. According to the technical scheme, firstly, mesoporous silica nanoparticles are prepared by a template method; secondly, surface amino modification is carried out onto the mesoporous silica nanoparticles by 3-aminopropyltriethoxy silane; thirdly, ursolic acid is chemically coupled to the spherical mesoporous silica nanoparticles by amido bonds; and fourthly, the coupled nanoparticles are dispersed in DMF (dimethyl formamide) solution; a proper amount of ursolic acid is added, mixed and stirred; and finally vacuum drying is carried out to obtain the amino-modified silica with dual drug-loading effects. The mesoporous nano material with dual drug-loading effects prepared by the mesoporous silica disclosed by the invention is high in loading rate, can achieve controlled release effect for the loading drug ursolic acid, so that drug effect lasts for a long period time, and therefore, bioavailability of the ursolic acid is greatly improved.

A metal nanoparticle dispersion comprising: a dispersion of a polymer compound (X), which comprises a polyalkyleneimine chain (a), a hydrophilic segment (b) and a hydrophobic segment (c), and metal nanoparticles (Y).

Belonging to the technical field of heat storage and transfer, the invention provides a ternary nitric acid nano-molten salt heat transfer and storage medium, a preparation method and application thereof. The ternary nitric acid nano-molten salt heat transfer and storage medium contains a ternary nitric acid molten salt system formed by potassium nitrate, sodium nitrate and sodium nitrite. The ternary nitric acid nano-molten salt heat transfer and storage medium is characterized in that it also includes metal oxide nanoparticles and / or non-metal oxide nanoparticles. The nanoparticles are dispersed into the ternary nitric acid molten salt system to undergo compounding so as to form the ternary nitric acid nano-molten salt heat transfer and storage medium. The ternary nitric acid nano-molten salt involved in the invention has a low melting point, an upper limit use temperature up to 600DEG C, good thermal stability, and high heat conductivity, thus being very suitable for the heat storage and transfer system of industrial energy storage and solar-thermal power generation.

The present invention is preparation process of magnetic particle / polymer / silica magnetic microsphere and belongs to the field of magnetic material technology. The technological process includes the following steps: 1. dispersing nanometer hydrophobic magnetic particle in solvent comprising silane reagent and olefin monomer to form oil phase, dissolving surfactant in water to form water phase, mixing to form oil-in-water suspension, adding initiator to initiate polymerization to obtain magnetic microsphere with polymer in the surface; and 2. dispersing the magnetic microsphere with polymer in mixed solvent comprising alcohol, water and ammonia water and hydrolyzing condensation of ethyl silicate to grow silica layer. The present invention has simple silica layer growth process and excellent controllability, and the prepared magnetic composition particle has excellent biocompatibility and high chemical stability and may be further functionated.

An organic layer capable of forming surface areas having an adsorption property different from that of a periphery due to the chemical change of a surface functional group is formed on a board. The surface of the organic layer is patterned and oxidized by a scanning probe microscope to form an array pattern in which small sections for adsorbing nanoparticles are arranged. Then, nanoparticle dispersed solution is applied to the organic layer having the array pattern or the organic layer is dipped in the nanoparticle dispersed solution to form a particle layer on the organic layer. At this time, the nanoparticles in the nanoparticle dispersed solution are respectively fixed only onto the small sections. Therefore, a nanoparticle array on which groups of nanoparticles are arranged in an array can be obtained. Thus, the nanoparticle array on which the groups of the nanoscale particles are arranged on the board is efficiently formed

The invention provides a molten nano-carbonate heat transfer and accumulation medium, and a preparation method and an application thereof, and belongs to the technical field of heat storage and transmission. The molten nano-carbonate heat transfer and accumulation medium contains a molten carbonate system formed by potassium carbonate, sodium carbonate, lithium carbonate and sodium chloride, nanoparticles are added into the molten carbonate system, and the nanoparticles are metal oxide and / or nonmetal oxide; and the nanoparticles are dispersed into the molten carbonate system, and the molten nano-carbonate heat transfer and accumulation medium is formed through compounding. The melting point of molten nano-carbonate is low, so the molten nano-carbonate heat transfer and accumulation medium has an upper limit use temperature of 800DEG C, has a good heat stability and a high heat conductivity, and is very suitable for the heat accumulation and transfer systems of industrial energy accumulation and solar photo-thermal power generation.

A nanoparticle thin film, a method for dispersing nanoparticles and a method for producing nanoparticle thin film using the same. The method for dispersing nanoparticles may include modifying the surface of nanoparticles with a charged material, drying the surface-modified nanoparticles under vacuum and / or dispersing the dried nanoparticles in a solvent. According to the methods provided, the nanoparticle thin film may exhibit more stability, lesser defects and / or lesser aggregation of nanoparticles. In addition, 2-dimensional and / or 3-dimensional nanoparticle thin films may be produced in which nanoparticles may be more uniformly applied over larger areas. The nanoparticle thin films produced by the methods may be more effectively used for a variety of applications (e.g., flash memory devices, DRAMs, hard disks, luminescent devices, organic light-emitting diodes (OLEDs) or the like).

The invention relates to a nanometer molten binary nitrate heat-transfer heat-storage medium and a preparation method thereof and belongs to the field of solar photo-thermal electricity generation. The nanometer molten binary nitrate heat-transfer heat-storage medium is characterized in that nano-particles are dispersed in a KNO3-NaNO3 and KNO3-NaNO2 solid-liquid phase-change molten binary nitrate system at a high temperature so that the nanometer molten binary nitrate heat-transfer heat-storage medium is compounded, and the nano-particles comprise SiO2, ZnO, Al2O3, TiO2, CaO and / or MgO nanoparticles. The nanometer molten binary nitrate heat-transfer heat-storage medium solves the problem that the existing nanometer molten binary nitrate system has a low heat conductivity coefficient, poor heat stability and a narrow use temperature scope and can be widely used in the technical field of solar photo-thermal electricity generation.

The invention relates to a method for preparing a mesoporous silica nanometer composite flame retardant, comprising the following steps of: (1) using a silicon source as a precursor, preparing a silica compound by a sol-gel chemical principle under the action of a structure-directing agent, and removing the structure-directing agent to obtain mesoporous silica; (2) dissolving a certain amount of phosphorus type and phosphorus-nitrogen type fire retardants in water or a volatile solvent to form an uniform solution; and (3) adding a proper amount of the mesoporous silica particles prepared from the step (1), stirring for hours at a certain temperature, removing water or the volatile solvent, carrying out vacuum drying, grinding, and sieving to obtain the mesoporous silica nanometer composite flame retardant. The preparation method provided by the invention has advantages of simple preparation process, mild condition and safe process. The prepared composite flame retardant is nanoparticles, has good dispersibility and excellent synergistic flame retardant and smoke suppression effects, and can be widely applied in flame retardation of a plurality of materials.

Manufacture process scientific formula mechanically refined and nanoparticle dispersion preform slurry non ionic or electrolyte carbon nanofoam CNFs with or without ionic suspension elements manufactured, Preform slurry high wear-heat resistant parts electronic component composite coils, composite windings, drawn, annealing, spun, coils, windings, wire, woven textile mesh, shielding, brushes, inductors, antinode couplers, electric rheostats, starters, motors, alternators, generators, ionic suspension element enhanced composite coils, composite windings, drawn, annealing, spun, coils, windings, wire, woven textile mesh, shielding, brushes, capacitors, battery cells, rheostats, electronic resistors, transformers, transducers, rectifiers, power supplies, or heat sinks, Preform slurry carbon nanofoam CNFs extrusion high wear-heat resistant parts aerospace, automotive, and transportation brake calipers, rotors, pads, washers, spacers, and bushings, Preform slurry carbon nanofoam CNFs extrusion high wear-heat resistant parts precision casting molds manufacturing highly pure metal, Super Alloy, acid-solid, alkaline, glass, acrylic, halide, alkalide, or ceramics specializing in 2.5 phase die cast molding.

The invention discloses a preparation method for gold magnetic composite nanometer particles. Firstly, magnetic nanometer particles of Fe3O4 are prepared by using a chemical co-precipitation method, the surface of the magnetic particles are modified by a silane coupling agent, then with the modified nanometer particles of Fe3O4 as seeds and oil amine as a reduction agent, gold ions are reduced to metallic gold on the surface of the magnetic nanometer particles in an ultrasonic condition, then the nanometer particles are prepared. The nanometer particles have the advantages of good dispersion, strong magnetic response and having double bonds that can lead to polymerization reaction on the surface of the particles. The nanometer particles have the diameter of 30 to 50nm and saturation magnetization of 6.8 to 17.6 emu per gram, thus showing super paramagnetism. The nanometer particles not only have magnetic response function, but also can carry out polymerization reaction with a plurality of functional monomers, thus having wide application prospect in a plurality of fields, targeted drug control and release, hyperthermia, isolation of protein and enzyme, etc.

The invention belongs to the field of high polymer composites and particularly relates to a nanoparticle / graphene oxide composite modified high polymer material and a preparation method thereof. The composite is prepared from nanoparticle / graphene oxide composite particles and a macromolecular polymer matrix, wherein the nanoparticle / graphene oxide composite particles are synthesized with an electrostatic self-assembly method, that is, an amino modified nanoparticle dispersion liquid is ionized to have positive charges while graphene oxide contains a large quantity of carboxyls and hydroxyls and is ionized to have negative charges, particles with positive and negative charges are sufficiently contacted, and electrostatically self-assembled nanoparticle and graphene oxide composite particles are obtained. The prepared nanoparticle / graphene oxide composite modified high polymer material has excellent mechanical and tribological performance, is simple and efficient to prepare and has goodapplication prospects in automobiles, aerospace, electronic and electrical engineering, machinery, weapons and other fields.

The invention relates to graphene nano particle compound aerogel microspheres and a preparation method thereof, and belongs to the field of functional materials. The graphene nano particle compound aerogel microspheres are prepared from, by weight, 100 parts of deionized water, 0.05-1.5 parts of graphite oxide and 0.1-5 parts of nano particles. The raw materials are subjected to 1,600W ultrasound wave irradiation for 60 min to 180 min after being mixed to be prepared into a graphene oxide nano particle dispersion solution, the graphene oxide nano particle dispersion solution is atomized into graphene oxide nano particle drop microspheres through a spraying method, the graphene oxide nano particle drop microspheres are put in a cooling bath for receiving liquid collection, graphene oxide nano particle cold microspheres are obtained through filtering, and graphene oxide nano particle compound aerogel microspheres are obtained after freeze drying; the graphene nano particle compound aerogel microspheres are obtained through a thermal reduction method or chemical reduction method. The products are uniform in size, are provided with a porous net structure, are evenly loaded with metal / inorganic nano particles, and are low in mass and small in density. Meanwhile, the preparation method is easy to operate, simple and efficient.

The invention provides a preparation method of a shear thickening liquid. According to the preparation method, nanoparticles are used as a solid phase component of an STF liquid; a non-volatile liquid medium and volatile diluting solvent are prepared into a mixed solution; and the nanoparticles are dispersed in the mixed solution under the effects of stirring and ultrasound to form an emulsion; and then the diluting solvent is removed under a vacuum condition to obtain an uniform, transparent and stable STF liquid.

The invention relates to phosphoric copolyamide / nano-meter montmorillonite flame-retardant composite material and a method for preparing the same. The invention mainly aims at solving the technical problems that the prior flame-retardant polyamide uses more inorganic flame retardant, is easy to precipitate and has poor flame-retardant effect and low mechanical property, and the halogenated flame retardant polyamide is easy to pollute the environment during combustion. The organic montmorillonite is dispersed in the form of nano-particles in phosphoric copolyamide formed by the polymerization of phosphoric prepolymer and nylon 66 salt. The method for preparing the phosphoric copolyamide / nano-meter montmorillonite flame-retardant composite material comprises the steps of preparing the solution of ethanol in hexamethylene diamine, preparing the nylon 66 salt, preparing the phosphoric prepolymer and preparing the phosphoric copolyamide / nano-meter montmorillonite flame-retardant composite material. The phosphoric copolyamide / nano-meter montmorillonite flame-retardant composite material needs less flame retardant, has high flame-retardant efficiency and high mechanical property and causes no poisonous and harmful gas during combustion to pollute the environment.

Surface-modified metal oxide nanoparticles each having a core-shell structure and having an organic functional group on a surface, characterized in that the refractive index thereof is controlled by selecting at least one element constituting the metal oxide as a core from elements of the groups 4 and 5 of the periodic table, and a nanoparticles-dispersed resin comprising a matrix resin and the above metal oxide nanoparticles dispersed therein, the metal oxide nanoparticles being those which can be homogeneously dispersed in the matrix resin without causing secondary aggregation and which have a high refractive index and are colorless, the nanoparticles-dispersed resin being that which is obtained by homogeneously dispersing the above metal oxide nanoparticles in the matrix resin and which has a high refractive index and is excellent in colorless transparency.

A process for the production of an aqueous dispersion of metal nano particles comprising palladium is provided. The process comprises the admixture of a water soluble organic polymer, a palladium salt and a first reducing agent to an aqueous liquid. The first reducing agent is a metal-containing polymer which has reducing properties or a saccharide which has reducing properties. The nano particles can include a second metal. The dispersions can be used as catalysts for electroless plating, to produce heterogeneous catalysts and in the production of anti-microbial devices and compositions.

The invention discloses a preparation method and an application of a flexible catalytic material for water electrolysis, and belongs to the technical field of hydrogen production by water electrolysis. The preparation method comprises the following steps: (1) preparing cobalt-based Prussian blue analogue nanoparticles; (2) dispersing the cobalt-based Prussian blue analogue nanoparticles in an organic solvent, then adding polyacrylonitrile to prepare a spinning solution, and electrostatically spinning to prepare a Co-PBA / PAN composite nanofiber membrane; (3) pre-oxidizing the Co-PBA / PAN composite nanofiber membrane, and then carbonizing in an inert atmosphere to prepare the flexible catalytic material for water electrolysis. In the catalytic material for water electrolysis prepared in the invention, cobalt carbide is uniformly dispersed in porous carbon fiber, so that catalytic sites are increased. Meanwhile, the porous carbon fiber provides carriers for the catalytic sites and enhancesthe conductivity, thereby improving the problems of easy falling and loss of conventional powder catalytic materials; and a production method is easy and convenient, environment-friendly and safe, and can achieve large-area continuous production.

The present invention is directed to a composition for preparing transparent conductive coating on transparent substrate by an environment friendly method. An aqueous foam dispersion containing metal nanoparticles can form a transparent film by spontaneous self-assembly, which becomes conductive after sintering. The foam formulation contains mainly water without any toxic organic solvent.

The invention provides a preparation method of a polyamide acid dispersion liquid. The preparation method comprises the following steps: dispersing metal oxide nanoparticles with the surfaces modified by a coupling agent into an organic solvent, thereby obtaining a nanoparticle dispersion liquid; and mixing the obtained nanoparticle dispersion liquid with dianhydride and diamine and reacting, thereby obtaining the polyamide acid dispersion liquid. According to the preparation method, the surfaces of the metal oxide nanoparticles are modified firstly; and then the nanoparticles are dispersed into the organic solvent with the low viscosity, so that the nanoparticles are dispersed evenly and stably, and therefore, the defect that the nanoparticles are not dispersed evenly because the polyamide acid solution is high in viscosity is overcome. Finally, the polyamide acid dispersion liquid is obtained by performing a polymerization reaction. A polyimide film prepared by the polyamide acid dispersion liquid is good in corona-resistant performance and mechanical performance.

The invention discloses an ultrasonic atomization assisted electrospinning technique and belongs to the field of preparation and applications of nano materials. According to the technique, prepared graphene, graphene oxide, carbon nano tubes and other nanoparticles are dispersed in a storage tank of an ultrasonic atomizer, atomization spraying of the nanoparticles is realized, and the problem of nanoparticle blocking caused with a conventional mixing method is solved. Ultrasonic atomization and electrospinning techniques are combined for use, a prepared nanoparticle polymer composite film has uniformly mixed nanoparticles, and agglomeration is not easily caused. The polymer fiber film prepared with the technique has high separation efficiency, good strength and excellent water resistance, and the physical and chemical properties of the composite film material are improved. Compared with a conventional electrospinning technique, graphene and the carbon nano tubes can be mixed in any ratio, the conventional blocking problem of an electrospinning sprayer is solved, and the technique has important application prospect in environment treatment and electrode material preparation.

The invention relates to a transparent heat-insulation polyvinyl alcohol poly-butyraldehyde nanocomposite and a preparation method thereof, belonging to the field of polymer-nano particle composite. Nano particles processed by coupling agent are dispersed in polyvinyl alcohol by ultrasonic wave and dispersing agent; under the action of catalyst, the nano particles and n-butanal are subjected to condensation reaction; nanocomposite is prepared with an in-suit dispersion one-step method; then, the nanocomposite and a proper quantity of antioxygen and film-forming solvent are stirred and mixed to obtain homogeneous solution; and then the homogeneous solution is poured into a mould to form the film. The film manufactured with the nanocomposite synthetized with the in-suit dispersion one-step method has even appearance, high transparency of a visible region and obvious heat-insulation effect of reflected infrared. The method is convenient to operate, and the production process route is simplified and shortened. Compared with other methods, the method can achieve same mechanical property and heat insulation effect, the adopted nano particle has small use amount, and therefore, production cost can be obviously lowered, which is favorable for industrial production. The transparent heat-insulation polyvinyl alcohol poly-butyraldehyde nanocomposite has wide application prospect in the safety glass industry of buildings and automobiles.

Nanoparticle dispersions of ZnS doped with a luminescent center and of CuxS are prepared together or separately by precipitation from aqueous solutions. When such dispersions are coated between conductive electrodes a Thin Film Inorganic Light Emitting Diode device is obtained.

The invention provides an ultraviolet curing coating composition with high wear resistance and fingerprint resistance and a preparation method thereof. The composition is prepared from the following components in parts by weight: 30-50 parts of high-functionality acrylate resin, 5-15 parts of fluorine-modified acrylate oligomer, 5-20 parts of an acrylate monomer, 5-15 parts of nanoparticle dispersion liquid, 5-9 parts of a photoinitiator, 0.05-2 parts of an auxiliary agent and 30-50 parts of a solvent. Compared with the prior art, the steel wool of the prepared ultraviolet curing coating composition is excellent in wear resistance and has fingerprint resistance and hand sweat resistance; and the coating has high hardness, is suitable for surface protection of plastic base materials, has excellent comprehensive performance, and can be applied to the related fields of mobile phone plastic rear covers, mobile phone films and the like.