58 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 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 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 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 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 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.

The invention provides low-hysteresis electronic skin as well as a preparation method and application thereof, and particularly relates to the technical field of biological materials. The preparation method specifically comprises the following steps: S1, preparing seed particles by utilizing a seed feeding emulsion polymerization method, and finishing directional polymerization of the seed particles to obtain a seed emulsion containing the seed particles; s2, preparing a nano-particle dispersion liquid by using the seed emulsion containing the seed particles; s3, preparing a multivalent metal ion solution; s4, the nano-particle dispersion liquid and the multivalent metal ion solution are cross-linked through dynamic coordination bonds to form the three-dimensional network hydrogel electronic skin. According to the invention, self-synthesized nanoparticles are used as a multifunctional cross-linking agent and a conductive matrix, and are subjected to coordination reaction with multivalent metal ions, so that entropy elasticity of the nanoparticles is combined with dynamic nature of metal coordination bonds, and the purposes of low hysteresis, high flexibility, high conductivity and adjustable performance are achieved at one stroke.

The application discloses a high-stability resveratrol lipid Pickering emulsion and a preparation method thereof. The preparation method is as follows: (1) resveratrol is dissolved in anhydrous ethanol, mixed with high-melting-point lipids, heated to obtain an oil phase, edible emulsifiers are dissolved in distilled water, heated to obtain an aqueous phase, the aqueous phase is slowly poured into the oil phase and stirred, and then the mixed solution is subjected to high-speed shearing, ultrasonic treatment and cooling to obtain a resveratrol-loaded lipid nanoparticle dispersion; (2) the above particle dispersion is mixed with edible vegetable oil, and subjected to ultrasonic emulsification treatment to obtain the high-stability resveratrol lipid Pickering emulsion. The application has the advantages of convenient operation and mild conditions, the dispersibility of resveratrol is improved by means of the lipid nanoparticles, the oxidation stability of the food-grade lipid Pickering emulsion is greatly improved, and the application can be widely applied to the food, medicine and cosmetic industries.

The invention discloses wafer rough polishing liquid based on a nano-particle dispersion technology and a preparation method thereof. The preparation method comprises the following steps: S1, surface modification of nano abrasive particles; s2, preparing a polishing solution; s3, a third-stage dispersion process; s4, carrying out online monitoring and regulation; and S5, filtering and packaging. The core-shell three-layer structure composite abrasive particle is adopted for the nano abrasive particle, the inner layer is high-hardness mechanical grinding, the middle layer is used for buffering impact and enhancing dispersion, the outer layer is used for accelerating oxidation reaction, the grinding efficiency and uniformity are improved, the composite dispersing agent ensures stable dispersion of the nano particle through the dual mechanisms of electrostatic repulsion and steric hindrance, agglomeration is avoided, and the wear resistance of the nano particle is improved. During dispersion, high-energy ball milling, high-shear emulsification, ultrasonic cavitation and magnetic field assistance are combined, aggregates are effectively crushed, abrasive particles are refined, dispersion stability is enhanced, accurate parameters such as particle size, potential and viscosity are ensured through online monitoring and regulation, the performance of the polishing solution is improved through the whole process, and the wafer polishing quality and efficiency are guaranteed.

The invention provides an electron transport layer and a preparation method thereof, and a perovskite solar cell, and the preparation method comprises the steps: firstly, mixing a water-based SnO2 nanoparticle dispersion liquid with a silane coupling agent, and carrying out a grafting modification reaction under heating and stirring conditions, after the reaction is finished, centrifuging, washing and drying to obtain modified SnO2 powder of which the surface is grafted with a silane coupling agent; secondly, dispersing the modified SnO2 powder in an organic solvent compatible with the perovskite light absorption layer, and performing ultrasonic treatment to obtain SnO2 organic dispersion liquid; and finally, coating the SnO2 organic dispersion liquid on a substrate through a spin-coating method, and carrying out annealing treatment to obtain the electron transport layer. The water-based SnO2 nano-particles are subjected to graft modification through the silane coupling agent, so that the agglomeration tendency of the water-based SnO2 nano-particles in an organic solvent can be effectively inhibited to realize stable dispersion, and a uniform and compact SnO2 thin film with excellent electron transmission performance can be formed on a perovskite light absorption layer through a spin-coating process.

This invention discloses a self-triggered thermoelectric catalytic nanoparticle material, its preparation method, and its application. The preparation method includes adding antimony salt, bismuth salt, tellurium salt, PVP, and sodium hydroxide solution to ethylene glycol and stirring to obtain a mixture. The mixture is then sealed and reacted at 220–240°C to obtain BST nanoparticles. The BST nanoparticles are placed in deionized water and hydrochloric acid solution is added. Then, the mixture is ultrasonicated and centrifuged to collect the precipitate. The precipitate is then washed and dispersed in deionized water to obtain a BST nanoparticle dispersion. Calcium chloride and PAA are dissolved in deionized water, and the BST nanoparticle dispersion is added dropwise under stirring and ultrasonicated. Hydrogen peroxide is added to the mixture and stirred. The mixture is then centrifuged, the precipitate is collected, and washed. The self-triggered thermoelectric catalytic nanoparticle material of this invention exhibits high specificity and strong targeting by triggering catalytic therapeutic effects in response to the tumor microenvironment.

The invention discloses gold-ferroferric oxide Janus structure nanoparticles as well as a preparation method and application thereof, and relates to the technical field of magnetic nanoparticle imaging. The method comprises the following steps: reacting a gold source and a reducing agent in a mixed system of oleylamine and n-octane in a nitrogen atmosphere to obtain gold nanoparticles; the preparation method comprises the following steps: dispersing an iron source in oleylamine, and adding a gold nanoparticle dispersion liquid to obtain oil-phase gold-ferroferric oxide Janus structure nanoparticles; according to the preparation method, the gold-ferroferric oxide Janus nanoparticles with asymmetric structures are constructed and subjected to surface functional modification, so that the gold-ferroferric oxide Janus nanoparticles can be assembled in a specific acidic microenvironment, MPI imaging signals are remarkably improved while efficient enrichment at tumors is realized, and a new way is provided for tumor targeted visualization and radiotherapy sensitization.

This invention discloses a high-abrasion-resistant UV matte ink for printing and its preparation method. The high-abrasion-resistant UV matte ink for printing includes the following components: polyurethane acrylate, photoinitiator, raw tung oil, UV monomer, modified nanoparticle dispersion, matting agent, and additives. Compared with existing products, the ink of this application not only has excellent printability, but also has a fine and stable texture, is not prone to agglomeration, dries evenly and quickly, is fast and efficient in printing, has strong adhesion, and is tough and abrasion-resistant. When this ink is printed on digital 3C products, the printing thickness only needs to be 3-5 μm. Even after more than 5,000 rubs, the clarity and integrity of the pattern and text can still be guaranteed, greatly improving the durability of electronic products. It can be widely used for coating and protection of digital 3C products.

The present disclosure provides a cell-transfection agent including a composition including a de-watered functionalized polydisperse zwitterionic spinel nanoparticle dispersion, where each nanoparticle of the nanoparticle dispersion includes a core with a formula AB2O4 and is functionalized with a combination including free amine groups and thiol reactive groups, where A is a divalent cation and B is a trivalent cation, and where the composition is substantially free of irreversibly aggregated spinel nanoparticles. The present disclosure also provides therapeutic compositions including the cell-transfection agent, as well as methods of treatment and methods of manufacturing the cell-transfection agent and therapeutic compositions.

This application relates to the field of solar cell technology, and more particularly to a transparent conductive oxide electrode, its preparation method, and perovskite solar cells. An embodiment of this application provides a method for preparing a transparent conductive oxide electrode, comprising the following steps: reacting a metal salt with an alkali, then sintering the precipitate to obtain nanoparticles; dispersing the nanoparticles in a solvent to prepare a nanoparticle dispersion; and preparing a transparent conductive oxide electrode on a substrate using a wet process. In a first aspect, this application employs a wet process to prepare the transparent conductive oxide electrode. This preparation method is gentle and does not cause any energy damage to the substrate during the preparation of the transparent conductive oxide electrode. Furthermore, the transparent conductive oxide electrode can possess both low resistivity and high carrier mobility, while also ensuring transmittance in the IR region (infrared).

A method includes a step of preparing a nanoparticle that has a perovskite-type crystal structure as an allotrope and includes multiple crystal structures, a step of preparing a ligand solution containing a solvent that has a relative dielectric constant of a prescribed value or less and an associative ligand that includes a main chain having a plurality of carbon atoms and a polar group having a higher polarity than the main chain and self-associates in the solvent, and a step of preparing a nanoparticle dispersion by bringing the nanoparticle and the ligand solution into contact with each other, wherein the step of preparing a nanoparticle dispersion includes a step of selectively increasing the ratio of the content of a prescribed crystal structure in the multiple crystal structures.

A multi-type emulsion composition and a preparation method thereof are disclosed. The emulsion composition is a composition in which a water part and an oil part are mixed and emulsified, the water part includes a non-amphipathic nanoparticle dispersion, the oil part includes an emulsion and the emulsion includes an oil phase or silicone phase as an external phase, the emulsion composition includes the water part as a continuous phase and the oil part as a dispersed phase, and the dispersed phase is surrounded by the non-amphipathic nanoparticles.

A method for manufacturing photolithographic masks based on nanoparticle arrays is disclosed. This method utilizes inkjet printing to create a controllable array of water droplets. Nanoparticle arrays of different diameters are then sprayed onto the surface of the water droplets. The nanoparticle dispersion is immiscible with the water droplets, forming a nanoparticle monolayer film on the droplet surface. After heating and drying, a nanoparticle monolayer array is formed, which is then transferred to a flexible transparent substrate. By controlling the nanoparticle colloidal material and diameter printed on the surface of water droplets at different locations, photolithographic masks based on nanoparticle monolayer arrays of various sizes can be formed to manufacture complex micro / nano structure arrays. This invention overcomes the limitation of nanoparticle array masks, which can only manufacture single-morphological structures, by using inkjet printing to locally manufacture combinations of nanoparticle monolayer arrays of different diameters. This results in a simple, efficient, and controllable nanoparticle monolayer array manufacturing technology.

The application provides a kind of based on nanometer modified bio-based composite mechanical property optimization method, belongs to the technical field of polymer compound, the application is through the silane coupling agent modification pretreatment to wood powder, prepares functionalized nanoparticle dispersion liquid and uses graph theory model to evaluate dispersion, modified wood powder and polyethylene are proportioned in twin-screw extruder melt blending, simultaneously join functionalized nanoparticle dispersion liquid and utilize intelligent dispersion optimization model to carry out real-time control, through the grid performance index evaluation network structure integrity, uses multi-objective optimization game model to carry out comprehensive optimization to tensile strength, bending strength, impact strength, adjusts nanoparticle addition amount, mixing temperature, mixing time and other process parameters according to optimization result and repeats optimization until reaching preset target value, solves the technical problem that nanometer particle is not evenly dispersed, forms local stress concentration point, affects overall mechanical property.

The present application relates to a kind of infrared transparent super-hydrophobic coating and its preparation method and application, polypropylene dispersion liquid is sprayed on the surface of substrate, then again spray modified nanoparticle dispersion liquid, heat treatment, obtain composite coating.The method of the present application is combined with special processing process to obtain high-performance coating, which also expands the functionalization of super-hydrophobic materials, and has important practical applications in infrared detection, infrared thermal imaging and other aspects.

The application belongs to the technical field of photoelectrochemical detection, and particularly relates to a preparation method of a self-breathing photoelectric self-powered sensor and application thereof in detection of microcystin-RR. Ti3C2 dispersion liquid is coated on ITO, Ag3BiO3 nanoparticle dispersion liquid is coated on the electrode to prepare a photoanode, a porous gas diffusion electrode treated by PTFE hydrophobicity is used as an air self-breathing cathode, then the air self-breathing cathode, a single-chamber quartz electrolytic cell and the photoanode apta / Ag3BiO3 / Ti3C2 / ITO are assembled together to construct the self-breathing photoelectric self-powered sensor. The sensor constructed by the application has a wide detection range, high sensitivity and low detection limit, and has important significance for detection of microcystin.

The invention relates to a preparation method of an edible mushroom protein-polysaccharide nanoparticle stabilized Pickering emulsion, which comprises the following steps: S1, dispersing edible mushroom protein-polysaccharide nanoparticles in ultrapure water to obtain an edible mushroom protein-polysaccharide nanoparticle dispersion liquid; s2, edible oil is dropwise added into the edible mushroom protein-polysaccharide nanoparticle dispersion liquid, and the edible mushroom protein-polysaccharide nanoparticle stabilized Pickering emulsion is obtained through homogenization and ultrasonic treatment in sequence. The high-stability Pickering emulsion is prepared by taking the edible mushroom protein-polysaccharide nanoparticles and the edible oil as raw materials and combining high-speed homogenization with an ultrasonic treatment method, and the method has the advantages of simplicity in operation, greenness, high efficiency, easiness in industrial processing and the like. The Pickering emulsion with stable edible mushroom protein-polysaccharide nanoparticles prepared by the method has the advantages of small particle size and good stability on conditions such as centrifugation, storage, ionic environment and heat treatment, and can be well suitable for a complex food system.

The invention discloses nano-hydroxyapatite composite acoustic ink as well as a preparation method and application thereof, and relates to the technical field of biology and new medicine. The ink comprises the following components in percentage by mass: 20%-30% of a hydrogel substrate, 3%-6% of a temperature-sensitive phase change material, 0%-2% of a rheology modifier, 0.8%-1.2% of a thermal initiator, 5%-15% of nano-hydroxyapatite and the balance of an aqueous solvent. The ink system depends on ultrasonic waves with high penetrating power as an energy source, the bottleneck that a traditional photocuring technology is limited by the optical property of a material is broken through, and direct printing of a high-concentration and non-transparent nano-hydroxyapatite composite material becomes possible. According to the preparation method, the high-quality acoustic ink which is uniform in nano-particle dispersion, full in component mixing and free of bubbles is prepared through key operations such as batch ultrasonic dispersion, and the preparation method is very important for realizing the precision of deep-penetration sound wave volume printing and the mechanical property and biological activity of a bone repair scaffold.