99 results about "Nanoparticle dispersion" patented technology

The invention relates to the technical field of oil-displacing agents, and particularly discloses a targeted nano oil-displacing agent and a preparation method thereof. A preparation method of a targeted nano oil displacement agent comprises the following steps: S1, dispersing 10-30 parts by mass of silanized inorganic nanoparticles in an alcoholic solution, adding 5-12 parts by mass of a functional monomer, 8-20 parts by mass of a hydrophilic monomer and 5-15 parts by mass of a hydrophobic monomer in an inert atmosphere, uniformly mixing, heating to 75-85 DEG C, adding an initiator, carrying out a constant temperature reaction for 4-6 h, and cooling to obtain a pre-grafted nanoparticle dispersion liquid; s2, mixing the pre-grafted nanoparticle dispersion liquid with a composite surfactant, adjusting the pH value to 6.5-7.5, and mixing at 30-40 DEG C for 22-26 hours to obtain the targeted nano oil displacement agent, the targeting type nano oil displacement agent prepared by the invention can still keep excellent dispersion stability and ultralow interfacial tension under the condition of a high-salt oil reservoir, so that the oil displacement efficiency is remarkably improved.

The invention provides a method for optimizing the mechanical property of a bio-based composite material based on nano modification, and belongs to the technical field of high-molecular compound compounds.The method includes the steps that wood flour is subjected to silane coupling agent modification pretreatment, a functionalized nano particle dispersion liquid is prepared, the dispersity is evaluated through a graph theory model, and the mechanical property of the bio-based composite material is optimized. The modified wood flour and polyethylene are subjected to melt blending in a twin-screw extruder in proportion, the functionalized nanoparticle dispersion liquid is synchronously added, real-time regulation and control are performed by using an intelligent dispersion optimization model, and the network structure integrity is evaluated through gridding performance indexes. The tensile strength, the bending strength and the impact strength are comprehensively optimized by adopting a multi-objective optimization game model, the process parameters such as the nano-particle addition amount, the mixing temperature and the mixing time are adjusted according to the optimization result, and the optimization is repeated until the preset target values are reached, so that the problems that the nano-particles are non-uniformly dispersed, local stress concentration points are formed, and the stability of the nano-particles is improved are solved. The overall mechanical property is influenced.

The invention discloses a preparation method of a photoresponsive self-cleaning optical coating with a dynamic self-repairing function. The preparation method comprises the following steps: adding a monomer containing a Diels-Alder reaction bond into a polyurethane prepolymer, and reacting to obtain the polyurethane elastomer with self-repairing capability. An azobenzene derivative is connected to a polyurethane elastomer through a covalent bond, and the photoresponsive self-repairing polymer is obtained. Hydrophobically modified TiO2 nanoparticles are prepared in situ through a sol-gel method. In order to further improve the dispersity of the TiO2 nanoparticles in the polymer, a silane coupling agent is adopted to carry out surface modification on the TiO2 nanoparticles. The preparation method comprises the following steps: mixing a photoresponsive self-repairing polymer and a TiO2 nanoparticle dispersion liquid in proportion, uniformly stirring, coating the mixed liquid on the surface of a base material, forming a uniform coating through a brush coating or spray coating method, and curing the coating at a proper temperature. Due to the excellent characteristics of light response self-repairing, ultraviolet resistance, wear resistance and the like, the coating can keep a long transparent period and good antifouling durability in an outdoor environment.

The present invention provides a method of preparing a lipid nanoparticle dispersion using a twin screw extruder. The inventive DNLF fluids are isotropic fluids which include greater than 25% lipophilic content in the form of lipidic nanoparticles dispersed in a continuous aqueous matrix with turbidity less than 375 nephelometric turbidity units (NTU).

The invention provides a tip Raman-based metal oxide nanoparticle in-situ detection method, which comprises: S1, dispersing metal oxide nanoparticles in a nanoparticle dispersion liquid, focusing laser to the tip of a nanometer tip through an objective lens, capturing a single nanoparticle by using an optical tweezers technology, and attaching the single nanoparticle to the nanometer tip; s2, focusing Raman laser on a nano needle tip-particle interface, generating a local high-temperature field through a photo-thermal near-field coupling effect, triggering a thermal chemical reaction of nano particles, and synchronously collecting a Raman spectrum; and S3, carrying out pretreatment and characteristic peak analysis on the collected Raman signal of the Raman spectrum, and determining the reaction critical temperature and the dynamic process in combination with temperature calibration data. According to the invention, capture and accurate heating of the nanoparticles are realized through photo-thermal coupling of the optical tweezers and the needle tip, and thermal chemical reaction monitoring of the nanoparticles is realized.

The invention provides a wear-resistant super-hydrophobic coating and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a porous structure coating which comprises a dispersion liquid of a micron-scale filler, resin and an auxiliary agent; (2) spraying the porous structure coating prepared in the step (1) on the surface of a base material by using a spraying technology to construct a stone-like paint or honeycomb-like firm porous network structure framework; (3) preparing a hydrophobic modified nanoparticle dispersion liquid; and (4) a hydrophobic modified nanoparticle dispersion liquid is sprayed on the porous network structure framework by using a spraying technology, the nanoparticles are embedded into the porous network structure framework, and the water contact angle of the composite coating is 158 degrees. The composite coating has high mechanical strength and excellent super-hydrophobic performance, and is endowed with wide application prospects.

The invention discloses a method for preparing open-cell zeolite molecular sieve homogeneous dispersion liquid under mild conditions. The method comprises the following steps: dispersing a molecular sieve containing a template agent in a quartz container filled with methyl pyrrolidone and hydrogen peroxide, and carrying out ultraviolet radiation on a solution in a continuous stirring state to obtain the activated open-pore zeolite molecular sieve dispersion liquid. According to the method provided by the invention, the organic template agent in micropores of the zeolite molecular sieve nanosheets or nanoparticles can be effectively removed at a temperature close to room temperature, the operation is simple, the condition is mild and pollution-free, and the problem that the zeolite molecular sieve nanosheets or nanoparticles are seriously agglomerated during traditional high-temperature roasting and pore opening is effectively solved. The highly dispersed open-pore zeolite molecular sieve nanosheet or nanoparticle dispersion liquid has a wide application prospect in construction of a two-dimensional zeolite molecular sieve membrane or a mixed matrix membrane.

The invention provides a preparation method of a perovskite solar cell, and belongs to the field of perovskite solar cells, and the preparation method comprises the following steps: S1, pretreating a transparent conductive substrate; s2, spin-coating the surface of the transparent conductive substrate with a nanoparticle dispersion liquid, and carrying out annealing treatment to obtain a flattened transparent conductive substrate; soaking the leveled transparent conductive substrate in a hydrogen peroxide solution with the concentration of 1-3%, washing and drying, and then carrying out ultraviolet ozone treatment to obtain a hydroxyl modified leveled transparent conductive substrate; s3, spin-coating a hole transport layer on the surface of the hydroxyl modified and flattened transparent conductive substrate; s4, spin-coating a perovskite light absorption layer on the surface of the hole transport layer; s5, spin-coating an electron transport layer on the surface of the perovskite light absorption layer; and S6, evaporating an electrode layer on the surface of the electron transport layer. According to the invention, the photoelectric conversion efficiency of the perovskite solar cell is significantly improved through leveling and hydroxylation treatment of the substrate.

The invention relates to a method (10) for manufacturing a metal powder of an alloy reinforced with a ceramic nanoparticle dispersion, comprising spherical metal particles that form a metal matrix and ceramic nanoparticles distributed in the metal matrix, wherein the method comprises: introducing a precursor alloy metal powder intended to form the metal matrix into a fluidisation chamber of a fluidised bed reactor (E1); injecting at least one fluidisation gas into the fluidisation chamber at an injection flow rate that is defined so that the powder particles are suspended due to the drag force exerted by the gas in the chamber and are individualised (E2, E3); heating the suspended metal powder particles in the gas stream to a heating temperature and for a heating duration that are defined so as to allow ceramic nanoparticles to form on the surface of the metal particles and inside the metal particles (E4).

The invention discloses a high-strength plastic titanium alloy and a preparation method thereof, and belongs to the technical field of titanium alloy materials. The structure of the titanium alloy is single equiaxed beta-Ti grains, and the titanium alloy comprises the following components: 23-25% of Nb, 5-8% of Zr, 2-5% of Sn, 0.5-1.5% of O and the balance of Ti and inevitable impurity elements. The preparation method comprises the steps of alloy casting, multi-stage homogenizing annealing, multi-pass DSA rolling, aging treatment, warm rolling, surface supersonic particle bombardment and the like. Oxygen atoms are introduced to form a local chemical ordered structure, dispersion strengthening of nano-particles is induced, a texture, a surface nanocrystalline layer and the like are controlled, and the strength-plasticity inversion problem of the beta titanium alloy is solved. The yield strength of the obtained titanium alloy reaches 1124 MPa, the elongation percentage is 14%, the titanium alloy has low elastic modulus and high biocompatibility and is suitable for the biomedical field, and the preparation method of the titanium alloy has reference value for improving the performance of other metal materials.

The invention discloses a preparation method of a CVD (Chemical Vapor Deposition) silicon carbide coating, and relates to a preparation method of a silicon carbide coating. The invention aims to solve the problems of poor uniformity and non-ideal anti-oxidation effect of the existing silicon carbide coating. The method comprises the following steps: 1, low-temperature plasma treatment; 2, preparing a nano particle dispersion liquid; 3, a CVD (Chemical Vapor Deposition) process; and 4, post-processing. The method is used for preparing the CVD silicon carbide coating.

The present disclosure relates to an electrically conductive nanoparticle dispersion and an electrically conductive composite nano structured material, CNSM. A CNSM comprises a liquid solvent having a pH above 8, a plurality of electrically conductive nanoparticles, and a binder, wherein the binder forms a matrix in which the electrically conductive nanoparticles are arranged and separated among them. Methods for heating using such a CNSM or dispersion are also provided.

The invention relates to the technical field of solid crystal glue materials, in particular to a reflective solid crystal glue material based on a nanoparticle dispersion technology, a preparation process and application. The coating comprises a resin matrix, a nanometer functional filler and an auxiliary agent system, wherein the resin matrix at least comprises epoxy resin, cyanate ester resin and benzoxazine resin; the nano functional filler is one of a nano particle material or a nano filler; through the synergistic effect of the surface-modified zinc oxide nanoparticles and the surface-modified cerium oxide nanoparticles and in combination with the total reflection characteristic of the titanium dioxide coated glass beads, an efficient reflection-refraction synergistic enhancement system is constructed; the plasma resonance effect of the surface-modified cerium oxide nanoparticles is matched with the high-refractive-index zinc oxide nanoparticles, so that the initial luminous flux of an LED is improved by 18%-22% compared with that of traditional solid crystal glue, the light utilization rate is improved by 20%-25%, the six-surface luminous potential of a chip is excavated, and therefore the quality of the solid crystal glue is improved.

The invention discloses a sheet deicing structure, a composite ice dredging coating and a preparation method thereof, and belongs to the technical field of wind power generation. The preparation method of the composite ice-dredging coating comprises the following steps: dispersing silicon dioxide nanoparticles in an organic solvent to form a nanoparticle dispersion liquid with the concentration of 1-10wt%; and then, adding low-surface-energy resin and a curing agent into the nano-particle dispersion liquid, and treating under the ultrasonic action and the ice-water bath condition to obtain the composite ice-dredging coating. In addition, the invention also provides the composite ice-dredging coating prepared by the preparation method. In addition, the invention further provides a blade deicing structure which sequentially comprises a surface anti-icing layer, a heating layer, a heat conduction layer and a structural layer from top to bottom. The surface anti-icing layer is made of the composite ice dredging coating. The composite ice dredging coating provided by the invention realizes effective ice prevention and removal of the blade.

The invention provides surface-modified aluminum oxide nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of nanoparticles and 3D printing materials. The alumina nanoparticle has a core-shell structure, an inner core is an alumina nanoparticle, and a shell layer is prepared by carrying out hydrolytic polycondensation on an organic silicon oligomer containing a photosensitive group and other organic silicon monomers. The surface-modified aluminum oxide nanoparticles are obtained by adding an organic silicon monomer containing a photosensitive group and other organic silicon monomers into an aluminum oxide nanoparticle dispersion liquid and carrying out hydrolytic polycondensation. The finally prepared modified aluminum oxide nano particles have nano sizes, have good dispersibility and stability in various photoactive diluents, and have low viscosity and high photoactivity, the preparation process is simple, the cost is low, and the method is suitable for industrial production. The mullite material with excellent mechanical properties and a complex topological structure can be prepared in batches through a 3D printing technology, and the market value is huge.

This invention discloses a method for preparing high-strength aluminum-magnesium-manganese alloy materials, belonging to the field of metallic materials technology. The method uses aluminum as a matrix and adds elements such as magnesium, manganese, zinc, copper, zirconium, and titanium to prepare a master melt. A nano-ceramic suspension of yttrium oxide is prepared, atomized and dried into powder, and blown into the melt to introduce nanoparticles. Semi-continuous casting, homogenization heat treatment, intense plastic deformation such as equal-diameter angular channel extrusion, hot rolling, and aging treatment are employed to achieve nanoparticle dispersion strengthening. Optimizations include nanoparticle replacement, multiphase strengthening, parameter adjustment, and in-situ phase formation, which refine the alloy grain to 80-200 nm, significantly improving strength. Compared with existing technologies, this invention's process is environmentally friendly and precisely controlled, suitable for high-strength applications such as inverter housings, achieving a tensile strength of over 450 MPa and an elongation ≥10%.

The invention belongs to the technical field of nano-particles, and particularly discloses fluorescent polyethylene glycol terephthalate nano-particles and a preparation method thereof. The preparation method comprises the following steps: crushing and alkali-washing a raw material containing polyethylene glycol terephthalate in sequence to obtain polyethylene glycol terephthalate particles; mixing the mixed solution with an organic solvent to obtain a mixed solution, mixing the mixed solution with a polyethylene glycol terephthalate particle poor solvent, and filtering to obtain polyethylene glycol terephthalate nanoparticles; the nano-particles are mixed with tween-20, and nano-particle dispersion liquid is obtained; and carrying out swelling reaction on the nano-particle dispersion liquid and a tetraphenyl ethylene solution to obtain the fluorescent polyethylene glycol terephthalate nano-particles. According to the invention, the particle size and shape of the nanoparticles can be accurately controlled, the consistency of products is improved, and the phenomena of sedimentation and aggregation are reduced. By controlling the aggregation state of molecules, fluorescence quenching is effectively avoided, and the defect that traditional organic fluorescence aggregation is easy to quench is overcome.

To provide a method for producing luminescent nanoparticle dispersion with high dispersibility, by suppressing re-agglomeration of nanoparticles, by using a dispersion medium where the square of the difference between the dispersion energy of the medium (δdSol) and the dispersion energy of the luminescent nanoparticles (δdLN), (δdSol-δdLN)2, is small, in the producing step of the luminescent nanoparticle dispersion.SOLUTION: A method for producing a luminescent nanoparticle dispersion, which includes a process 1 of performing liquid-phase synthesis of a coarse nanoparticle solution by mixing a luminescent nanoparticle precursor, an organic base compound, and an organic acid compound in an organic solvent, and then removing the organic solvent from the coarse nanoparticle solution through sedimentation separation to obtain the coarse nanoparticles, and a process 2 of re-dispersing the coarse nanoparticles by adding a dispersing medium where the squared difference (δdSol-δdLN)2 between the dispersing force energy of the dispersing medium (δdSol) and that of the luminescent nanoparticles (δdLN) is 3.0 MPa or lower, and then removing the coarse particles through classification.SELECTED DRAWING: None

The present invention addresses the problem of providing a method for producing lipid nanoparticles, which enables the production of lipid nanoparticles having a narrow particle size distribution. According to the present invention, there is provided a method for producing lipid nanoparticles, the method comprising a step 1 for preparing a first solution that is an acidic aqueous solution containing an active ingredient, a step 2 for preparing a second solution that is a solution containing a specific lipid and an alcohol; a step 3 for preparing a lipid nanoparticle dispersion by mixing the first solution with the second solution in a flow channel, a pH adjustment step for adjusting the pH of the lipid nanoparticle dispersion, and an alcohol removal step, wherein the alcohol content in the lipid nanoparticle dispersion obtained in step 3 is 12.5-33 vol%, and the lipid nanoparticle dispersion is held for 1 minute or more after the completion of the step 3.

The invention discloses a multi-type emulsion composition and a preparation method thereof. The present invention relates to an emulsion composition in which an aqueous phase part and an oil phase part are mixed and emulsified, the aqueous phase part comprising a non-amphiphilic nanoparticle dispersion, the oil phase part comprising an emulsion comprising an oil part or a silicone part as an external phase, the emulsion composition comprising the aqueous phase part as a continuous phase, comprising the oil phase part as a dispersed phase, and the dispersed phase is surrounded by the non-amphiphilic nanoparticles.

The invention discloses a preparation method and application of a high-molecular polylactic acid nano composite material based on a copper-praseodymium metal organic framework, and belongs to the technical field of high-molecular composites.The preparation method comprises the steps that 1, polylactic acid is added into dioxane, and a uniform polylactic acid solution is prepared; step 2, dispersing the copper praseodymium MOF nano particles in dioxane to prepare a uniform dispersion liquid of the copper praseodymium MOF nano particles; step 3, adding the copper praseodymium MOF nanoparticle dispersion liquid obtained in the step 2 into the polylactic acid solution obtained in the step 1, and stirring at 60 DEG C for 1 hour to obtain uniform film forming liquid for later use; and 4, pouring the film-forming liquid obtained in the step 3 into a flat-bottom glass dish, and drying to obtain the polylactic acid nano-composite film with antibacterial and ammonia response functions. By adopting the preparation method, the high-molecular polylactic acid nano composite material with excellent properties such as water vapor barrier property, mechanical strength, ultraviolet shielding property, blue light shielding property and ammonia response discoloration property is obtained.

The invention discloses dispersed modified nanoparticles, a preparation method thereof, a hardening coating liquid and a hardening coating. The method comprises the following steps: S1, surface ammonification modification of the nanoparticles; S2, dispersion treatment of a composite dispersant; S2-1, preparation of the composite dispersant; and S2-2, uniformly dispersing a composite dispersant in an acrylic monomer, grinding, adding the surface ammoniation modified nanoparticles prepared in the step S1, and grinding and dispersing to obtain the modified nanoparticle dispersion liquid. Through multiple synergistic effects of particle surface modification, composite dispersant preparation and dispersion process matching, stable and uniform dispersion of nanoparticles in an acrylic monomer is realized; the coating hardness strengthening agent is applied to coating hardness strengthening, so that the hardness of a coating is remarkably improved, and meanwhile, good adhesive force and other mechanical properties are kept; and the preparation method provided by the invention is simple in process, is suitable for various matrix materials and coating systems, and has a wide application prospect.

Disclosed herein are compositions comprising silver nanoparticles with uniform particles and a narrow particle size distribution. Also disclosed herein are processes for preparing and purifying the dispersions of silver nanoparticles.

The present invention discloses a preparation method and application of a polymer polylactic acid nanocomposite material based on a copper-lutetium metal organic framework (Cu-LU) metal organic framework (MOF), belonging to the technical field of polymer composite materials. The method comprises the following steps: first, adding polylactic acid to dioxane to prepare a uniform polylactic acid solution; second, dispersing copper-lutetium metal organic framework (MOF) nanoparticles in dioxane to prepare a uniform dispersion of the Cu-lutetium metal organic framework (MOF) nanoparticles; third, adding the Cu-lutetium metal organic framework (MOF) nanoparticle dispersion obtained in step two to the polylactic acid solution obtained in step one, stirring at 60°C for 1 hour, obtaining a uniform film-forming solution for later use; and fourth, pouring the film-forming solution obtained in step three into a flat-bottomed glass dish and drying it to obtain a polylactic acid nanocomposite film having both antibacterial and ammonia-responsive functions. The present invention utilizes the above preparation method to obtain a polymer polylactic acid nanocomposite material having excellent water vapor barrier, mechanical strength, UV shielding, blue light shielding, and ammonia-responsive color change properties.

A light-emitting element includes an anode and a cathode, a light-emitting layer positioned between the anode and the cathode, and a charge function layer positioned between the anode and the light-emitting layer and including a nanoparticle including a metal atom, in which the charge function layer includes an organic molecule including a first functional group capable of bonding to the nanoparticle, a second functional group having a hole transport property, and a hydrocarbon group having 1 to 4 carbon atoms.

A method of manufacturing an quantum dot light emitting device, a quantum dot light emitting device, and an electronic device, the method including: forming an anode, forming a quantum dot light emitting layer on the anode, forming an electron auxiliary layer including alkaline-earth metal containing oxide nanoparticles on the quantum dot emitting layer, and forming a cathode on the electron auxiliary layer, wherein the forming of the electron auxiliary layer includes: preparing a precursor dispersion including an alkaline-earth metal precursor, preparing a basic reducing agent solution containing a basic reducing agent, and adding the basic reducing agent solution into the precursor dispersion dropwise at a controlled rate to grow alkaline-earth metal containing oxide nanoparticles, dispersing the alkaline-earth metal containing oxide nanoparticles in a dispersion medium to prepare an alkaline-earth metal containing oxide nanoparticle dispersion, and coating the alkaline-earth metal containing oxide nanoparticle dispersion on the quantum dot light emitting layer.

The present invention relates to the field of nanomaterial processing and dispersion, and discloses a two-phase shear nanoparticle dispersion method, which mainly comprises the following steps: uniformly mixing the nanomaterial to be dispersed, a liquid working fluid, and a dispersant; cooling the mixture loaded into a tubular mold, and liquefying a small amount of the working fluid in the contact area between the solid mixture and the outer surface of a friction disk to form an extremely thin liquid film, which will form an extremely high shear flow field and exert a strong deagglomeration effect on the nanoparticles contained in the liquid film.

The present application relates to a method for manufacturing an inverse opal structure membrane filter, the method comprising the steps of: preparing a mixed solution by mixing a nanoparticle dispersion solution and a sacrificial particle dispersion solution; applying the mixed solution onto a substrate to dry it; and heat-treating the mixed solution, wherein the surface of the sacrificial particles is modified by positive charges or negative charges.

The application belongs to the field of inorganic nanomaterials, and particularly relates to a low-temperature synthesis method of modified tin dioxide nanoparticles for perovskite solar cells, which comprises the following steps: dispersing a water-soluble salt or hydrate of tin, urea and a metal salt modifier in water; and obtaining a modified SnO2 nanoparticle dispersion liquid by reacting at 15-30 DEG C for 3-4 days; the metal salt modifier is a metal salt of potassium, cesium, magnesium and / or zirconium. The modified SnO2 nanoparticles can promote the transmission and extraction of electrons in the solar cell, inhibit the recombination loss of the perovskite solar cell, and thus improve the power conversion efficiency and stability of the perovskite solar cell when the modified SnO2 nanoparticles are used as an electron transport layer to prepare the perovskite solar cell.