262 results about "Nanoparticle dispersion" patented technology

The present invention relates to processes for preparing a stable suspension of carbon nanoparticles in a thermal transfer fluid to enhance thermal conductive properties, viscosity, and lubricity. One process is to disperse carbon nanoparticles directly into a thermal transfer fluid and other additives in the present of surfactants with intermittent ultrasonication. The second process is carried out in three stages. First, carbon nanoparticles are dispersed into a volatile solvent. Then, a thermal transfer fluid, surfactants, and other additives are added into this intermediate dispersion and mixed thoroughly. At last, the volatile solvent is removed to produce a uniformly dispersed nanofluid. The third process is to disperse carbon nanoparticles at an elevated temperature into a homogeneous mixture of surfactants and other additives in a thermal transfer fluid with help of a physical agitation. The present invention also relates to compositions of carbon nanoparticle nanofluids, such as nanolubricants and nanogreases. The nanofluid of the present invention is a dispersion of carbon nanoparticles, particularly carbon nanotubes, in a thermal transfer fluid in the present of surfactants. Addition of surfactants significantly increases the stability of nanoparticle dispersion. For nanogreases, carbon nanoparticles function both as a thickener to modulate viscosity and as a solid heat transfer medium to enhance thermal conductivity and high temperature resistance.

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 present invention relates to a process for preparing a stable suspension of carbon nanoparticles in a hydrophilic thermal transfer fluid to enhance thermal conductive properties and other characteristics such as freezing point of an antifreeze coolant. The process involves the step of dispersing carbon nanoparticles directly into a mixture of a thermal transfer fluid and other additives in the present of surfactants with intermittent ultrasonication. The present invention also relates to the composition of a hydrophilic nanofluid, which comprises carbon nanoparticles, particularly carbon nanotubes, a hydrophilic thermal transfer fluid, and at least one surfactant. Addition of surfactants significantly increases the stability of nanoparticle dispersion.

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.

A nanocomposite comprising a plurality of nanoparticles dispersed in a metallic alloy matrix, and a structural component formed from such a nanocomposite. The metallic matrix comprises at least one of a nickel-based alloy and an iron-based alloy. The nanocomposite contains a higher volume fraction of nanoparticle dispersoids than those presently available. The structural component include those used in hot gas path assemblies, such as steam turbines, gas turbines, and aircraft turbine. A method of making such nanocomposites is also disclosed.

A process for replacing the continuous phase of a nanoparticle dispersion with a less polar phase, includes filtering the dispersion through a semi-permeable membrane filter to remove the continuous phase, and introducing a less polar phase.

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.

A process for producing lightweight materials for a battery comprises lightweight polymer substrate coated with dispersions of nano particles, conductive matrixes and active material.

A process is described for the synthesis of metallic nanoparticles by chemical reduction of metal salts in the presence of organic ligands capable of binding to the metal particle surfaces and stabilizing them against agglomeration. The resultant nanoparticles or dispersions of the particles can be sintered into highly conductive films or traces at temperatures as low as 80° C. in 10 minutes or less.

A pigment dispersant is disclosed comprising a tri-block copolymer having a first block comprising a glycidyl (meth)acrylate reacted with a napthoic acid, a second block comprising (meth)acrylic acid alkyl esters, and a third block comprising (meth)acrylic acid alkyl esters, wherein said third block is different from said second block. The dispersant is suited for use in a nanoparticulate dispersion comprising pigment particles having an average primary particle size of less than 100 nm.

A UV-shielding silicone coating composition comprises (A) a dispersion in a dispersing medium of composite zinc oxide nanoparticles which are obtained by coating zinc oxide nanoparticles with an oxide or hydroxide of Al, Si, Zr or Sn, the dispersion having a photocatalytic degradability of up to 25%, (B) a silicone resin, (C) a curing catalyst, and (D) a solvent, the solids content of composite zinc oxide nanoparticle dispersion (A) being 1 to 50% by weight based on silicone resin (B). The composition is transparent to visible light, mar resistant, UV-shielding, weatherable, and durable.

A mild, simple process of preparing lignin nanoparticle dispersions is disclosed. Additionally, compositions and methods of making lignin nanoparticle-polymer complexes comprising derivatized and / or non-derivatized lignin nanoparticle dispersions and water soluble and / or water dispersible polymers are disclosed. Further, methods of using at least one of the lignin nanoparticle dispersions, derivatized lignin nanoparticle dispersions, and / or the lignin nanoparticle-polymer complex to impart rinse-resistant properties, such as hydrophilic properties, to substrates, or function as tunable nanoparticle surfactants are disclosed.

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 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 discloses a patterned transparent electrode fabrication method. The method comprises the steps of (1) depositing a conductive nanoparticle dispersion solution on a porous filter membrane with a negative pattern mask to obtain a patterned transparent conductive film adhered on the porous filter membrane; and (2) removing the mask, transferring the patterned transparent conductive film on the porous filter membrane onto a transparent substrate, and removing the porous filter membrane to obtain the patterned transparent electrode; wherein the dispersion solution contains conductive nanoparticles 0.015wt% to 5wt%, dispersing agent 0.15wt% to 20wt%, and water in balance; and the dispersing agent is selected from arbitrary one or the combination of a surfactant, organic acid, high-molecular polysaccharide and DNA macromolecules. The method has the advantages of simple process, low cost and large material selection range, and can accurately design and control the formed pattern according to requirement.

The invention relates to a method for preparing a load type high-dispersion multi-component precious metal nanoparticle catalyst. The method comprises the steps of 1) under inert atmosphere, uniformly stirring a solvent and a surface active agent, then adding a precious metal precursor solution, rising the temperature, reacting for a certain period of time, cooling to the room temperature, adding normal hexane, and performing extraction layering; 2) uniformly mixing the obtained upper layer nanoparticle solution with a carrier, and stirring or performing ultrasonic treatment; and 3) centrifugating, washing and drying or baking the mixed solution to obtain the catalyst. For the precious metal catalyst, even under a relatively high carrying amount, relatively good precious metal nanoparticle dispersion degree can be still guaranteed; the particle sizes of the particles are uniformly distributed; the precious metal carrying amount is controlled easily and accurately; the particle sizes and the components of multi-component particles can be controlled; and the catalysis application range is wide. The process is simple; the preparation cost is low; the applicability is high; and load-type high-dispersion precious metal and the multi-component precious metal nanoparticle catalyst can be prepared in a large scale.

The invention discloses a grapheme oxide quantum dot function sphere nanoparticle, a polyamide reverse osmosis membrane / nanofiltration membrane modified by the nanoparticle and a preparation method. The grapheme oxide quantum dot function sphere nanoparticle comprises a sphere kernel taking positive charge nanoparticles as supports and grapheme oxide quantum dots wrapping the sphere kernel layer by layer, and is prepared by slowly adding grapheme oxide quantum dot dispersion liquid into positive charge nanoparticle dispersion liquid prior to centrifugal precipitation, separation and purification. The function sphere nanoparticle based modified polyamide reverse osmosis membrane / nanofiltration membrane is prepared by inlaying the grapheme oxide quantum dot function sphere nanoparticle in a reverse osmosis membrane / nanofiltration membrane polyamide separation layer, and can be applied to the fields of seawater and brackish water desalination, seawater and brackish water softening, drinking water treatment, advanced wastewater treatment and the like. The spherical shell type special-shaped nanochannel is provided with multiple inlets and outlets, and water flux of the membrane can be increased.

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 discloses a mesoporous silica nanomotor, and a preparation method and the application thereof, relates to a motor, a preparation method and the application thereof, and aims at solving the technical problem of large size of the existing motor. The mesoporous silica nanomotor adopts mesoporous silica particles with the particle sizes of 50 to 90 nm, and a platinum layer is sputtered on the partial surface of the nanomotor. The preparation method comprises the following steps: firstly, synthesizing mesoporous silica nanoparticles, secondly, performing hydrophilic treatment to silicon chips, thirdly, dripping silicon dioxide nanoparticle dispersion liquid onto the hydrophilic silicon chips, drying, and sputtering platinum onto the silicon chips, on which a single-particle layer is arranged, obtained in step III, and fourthly, drying after ultrasonic vibration for shaking off, so as to obtain the mesoporous silica nanomotor. The application is to put the mesoporous silica nanomotor into hydrogen peroxide solution to be used. The nanomotor has Yin and Yang structural characteristics and a carrying function, the preparation method is simple to operate, and the primary synthetic amount is large. The mesoporous silica nanomotor can be applied to fields of biomedical, chemical and environment detection.

Nanoparticle dispersions of ZnS doped with a luminescent center are prepared 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 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.

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.

An organic pigment nanoparticle dispersion, its preparation method, a colored photosensitive resin composition containing the dispersion, a photosensitive resin transfer material using the composition, a color filter using the transfer material, and an LCD device using the color filter are provided to improve contrast, display characteristics and display durability. An organic pigment nanoparticle dispersion comprises an organic pigment nanoparticle, and contains 0.001-500 ppm of an alkali metal or an alkaline earth metal. Preferably the organic pigment nanoparticle dispersion comprises a polymer having a weight average molecular weight of 1,000 or more. A colored photosensitive resin composition comprises the organic pigment nanoparticle dispersion; a binder; a monomer or an oligomer; and a photopolymerization initiator. Preferably the pigment of the dispersion is a pyrrolopyrrole-based pigment.