26 results about "Silica nanoparticles" patented technology

The invention discloses a self-cleaning nano coating of photovoltaic glass, and aims to provide a self-cleaning nano coating special for photovoltaic module glass so as to improve the long-term effectiveness, high light transmission, wear resistance and weather resistance of a module, reduce the maintenance cost and improve the power generation efficiency. The nano coating is composed of the following components in percentage by mass: 30%-45% of a phosphate binder, 8%-15% of hollow silicon dioxide nanoparticles, 5%-12% of modified antimony-doped tin oxide nano sol, 1%-3% of a silane coupling agent and the balance of water, belongs to the technical field of fine chemical engineering.

The invention provides an intelligent color-controllable photonic crystal continuous preparation system. The intelligent color-controllable photonic crystal continuous preparation system sequentially comprises a nano silicon dioxide particle preparation system, a silicon dioxide nano particle purification system, a photonic crystal liquid drop preparation system and a high-temperature calcination drying system, the nano silicon dioxide particle preparation system is used for obtaining a silicon dioxide nano particle emulsion; the silicon dioxide nanoparticle purification system is used for centrifugally purifying and drying the obtained silicon dioxide nanoparticle emulsion to obtain nano silicon dioxide particles; the photonic crystal liquid drop preparation system is used for preparing photonic crystal liquid drops; and the high-temperature calcining and drying system is used for collecting the photonic crystal liquid drops, drying and calcining to obtain the photonic crystal. The device has the advantages of a plate-type microreactor and a spiral capillary microreactor, solves the problems of microchannel blockage by particles, uneven mixing in the early stage of reaction and the like, realizes continuous preparation of high-monodisperse nano silicon dioxide particles in a certain period, remarkably improves the reaction yield, and is efficient and safe in process.

The invention discloses a high-speed copper-clad plate material based on an epoxy resin system and a preparation method thereof, and belongs to the technical field of energy conservation and environmental protection. In order to solve the problems that a traditional copper-clad plate is high in dielectric loss, poor in heat conductivity and insufficient in heat resistance, fluorinated silicon dioxide nanoparticles (the surface energy is smaller than or equal to 18 mN / m) are prepared through a sol-gel method, and a boron nitride layer is modified through trisodium citrate and aminopropyltriethoxysilane; mixing with bisphenol A epoxy resin, a reactive diluent, a DOPO flame retardant, dicyandiamide and 2-methylimidazole to obtain a resin adhesive; adding nano filler and deionized water, mixing and defoaming at a high speed, presoaking 2116 glass fiber cloth to prepare a prepreg, laminating, matching with copper foil, performing segmented hot pressing, and performing secondary tempering. Dk of the obtained material is 3.1-3.35, Df is smaller than or equal to 0.0055, Tg is larger than or equal to 165 DEG C, heat conductivity is larger than or equal to 0.59 W / m.K, peel strength is larger than or equal to 1.78 N / mm, T288 is larger than or equal to 40 min, and the material is suitable for 5G high-speed PCBs and has low energy consumption and environmental friendliness.

The invention relates to a high-strength MBR (Membrane Biological Reactor) ultrafiltration membrane, a preparation system and method thereof and a spinning solution. According to the invention, a composite nano reinforcing agent composed of modified silicon dioxide and graphene oxide is innovatively introduced into a membrane solution. The two nano materials form a rigid-flexible synergistic enhanced network in a polymer matrix; the graphene oxide is used as a two-dimensional nanosheet layer, so that stress is effectively transmitted and dispersed; and the silicon dioxide nanoparticles are used as stress concentration points to prevent the propagation of microcracks. Meanwhile, the invention provides a set of composite reinforcement solution. The core of the scheme is that a polyester / polyamide high-density composite braided tube subjected to plasma surface treatment is adopted as a mechanical skeleton of the membrane, and main operation stress is borne from the macroscopic scale. The multi-stage synergistic enhancement mechanism from the macroscopic braided tube to the nanoscale endows the membrane filament with mechanical strength far beyond the conventional level and fatigue and filament breaking resistance.

The invention relates to the technical field of refractory materials, in particular to a refractory composite material and application thereof in cables. The material comprises phlogopite paper, alkali-free glass fiber thin cloth compounded on a first surface of the phlogopite paper, and an inner bonding layer and an outer bonding layer which are respectively arranged on two surfaces of the phlogopite paper. The key improvement is that the inner bonding layer and the outer bonding layer adopt silicon-containing ceramic bonding base materials and have the gradient distribution design of hydrated zinc borate, and inorganic silica ceramic seed layers with epoxy reaction sites are constructed on the surfaces of the phlogopite paper and the glass fabric in advance. Through dopamine coating and boron-containing siloxane grafting modification of silicon dioxide nanoparticles, interface bonding and high-temperature ceramic forming properties are significantly enhanced. The problems that a traditional fireproof mica tape loses high-temperature interlayer bonding force and is prone to pulverization are solved, good flexibility is ensured, and meanwhile the fireproof power supply time and the structural integrity of the cable under the impact of flames at the temperature of 750 DEG C or above are remarkably prolonged and improved.

By using a water-based primer composition, a primer layer is formed on the surface of a substrate, thereby enabling the manufacture of water-repellent articles with excellent abrasion resistance and chemical resistance. The water-based primer composition is used in the formation of the primer layer of a water-repellent article having a primer layer on the outer surface of the substrate and a water-repellent surface layer on the outer surface of the primer layer. The primer composition is characterized by comprising silica nanoparticles and a metal compound comprising any one or more of niobium, hafnium, zirconium, and tantalum, wherein the mass ratio of the metal compound to the silica nanoparticles is 5% or more and less than 1000%.

The invention relates to the technical field of composite materials, in particular to a high-transparency low-haze flame-retardant polycarbonate composite material as well as a preparation method and application thereof. The invention provides a high-transparency and low-haze flame-retardant polycarbonate composite material as well as a preparation method and application thereof, aiming at the problem that modified polycarbonate cannot give consideration to high light transmittance, low haze, high modulus and high flame retardance in the prior art. Comprising polycarbonate resin, cycloolefin copolymer resin, surface fluorinated silicon dioxide nanoparticles, surface modified C-glass fibers, a core-shell structure flame retardant, a potassium perfluorobutanesulfonate ionic liquid complex, an anti-dripping agent, an antioxidant and an ultraviolet absorbent. According to the invention, through PC / COC matrix refractive index matching and surface modified C-glass fiber surface five-layer gradient coating design, an ultralow refractive index is realized, surface fluorinated silica nanoparticles fill interface microdefects, extremely low interface light scattering is realized, and a highly transparent state is presented.

The invention relates to the technical field of demolding, and particularly discloses a novel semi-permanent superoleophobic demolding agent and a preparation method thereof. The release agent is prepared from the following raw materials in percentage by weight: 1.0 to 3.5 percent of fluorinated polyhedral oligomeric silsesquioxane, 1 to 10 percent of fluorinated silicon dioxide nanoparticles, 1 to 4 percent of alpha-cyanoacrylate adhesive, 1 to 3 percent of perfluoroalkyl silane, 0.1 to 1 percent of pyridine, 0.1 to 0.5 percent of silane coupling agent and the balance of solvent. The release agent disclosed by the invention has the characteristics of excellent super-oleophobicity, excellent wear resistance, outstanding chemical stability, relatively strong adhesive force, wide applicability and the like, can play a good barrier role between a molded surface and a base material, reduces the probability of adhesion between molded parts, and is relatively low in probability of transferring to the surfaces of the molded parts, so that the release agent can be applied to the surface treatment of the molded parts. Therefore, the recoating frequency is obviously reduced, and the labor cost and the material consumption are reduced.

The application discloses a preparation method of a low-refractive composite powder and application thereof. The preparation method of the low-refractive composite powder comprises the following steps: mixing submicron powder with a mixture containing tetraethyl orthosilicate, heating, and reacting under an acidic condition to obtain a first sol slurry; mixing and stirring the first slurry with a binder to obtain a second slurry; and performing spray granulation and calcination on the second slurry to obtain a low-refractive core-shell structure composite powder. According to the technical scheme, the high-refractive or high-absorbance submicron powder, which is not suitable for or cannot be used for 3D printing, is covered with the silicon dioxide nanoparticles formed by the reaction of the mixture containing tetraethyl orthosilicate on the surface of the submicron powder, so that the refractive index or the absorbance of the submicron powder is reduced, the refractive index difference between the ceramic powder material which is difficult to solidify or cannot be solidified and the photosensitive resin is reduced, and the solidification performance of the ceramic material is improved.

This application discloses a coating solution and its preparation method and application, relating to the field of coated photovoltaic glass technology. The coating solution includes water and hollow silica nanoparticles and solid silica nanoparticles dispersed in the water. The coating solution provided in this application uses hollow silica nanoparticles instead of traditional core-shell structure particles. During the tempering process, hollow silica nanoparticles do not exhibit large-scale thermal decomposition of polymeric substances and do not generate gas pressure in the film layer, thus avoiding the formation of pores in the film layer and improving the stability of the final coating.

To provide a thermally conductive resin composition which is excellent in heat resistance and suppresses deterioration of long-term insulation reliability after heat treatment.SOLUTION: A thermally conductive resin composition comprising: a thermosetting resin; a thermosetting agent; and an inorganic filler, wherein the thermosetting agent comprises an imide oligomer, and the inorganic filler comprises boron nitride aggregate particles and silica nanoparticles.SELECTED DRAWING: None

The invention discloses polyvinyl pyrrolidone grafted magnetic silicon dioxide nanoparticles, a preparation method of the polyvinyl pyrrolidone grafted magnetic silicon dioxide nanoparticles and application of the polyvinyl pyrrolidone grafted magnetic silicon dioxide nanoparticles in beer clarification. The material comprises a Fe3O4 (at) SiO2 core-shell nano particle (silicon dioxide wraps ferroferric oxide nano particles) carrier and a linear polyvinyl pyrrolidone (PVP) polymer grafted on the surface of the carrier. The material can be used for efficiently adsorbing polyphenol substances in beer primary pulp, second-level rapid separation is achieved through an external magnetic field, operation is easy and convenient, good recycling performance is achieved, and a new solution is provided for beer clarification.

The invention discloses a waterborne polyurethane flame-retardant coating and a preparation method thereof, and relates to the technical field of coating materials. The waterborne polyurethane flame-retardant coating at least comprises the following raw materials in parts by mass: 100 parts of flame-retardant modified polyurethane emulsion; 2 to 3 parts of gamma-aminopropyl triethoxy silane; 0.5 to 1 part of fluorinated silicon dioxide nano particle dispersion liquid; 0.1 to 0.2 part of an organic tin catalyst; 0.2 to 0.3 part of a wetting leveling agent; 0.1 to 0.2 part of a defoaming agent; the flame-retardant modified polyurethane emulsion at least comprises the following raw materials in parts by mass: 20-30 parts of castor oil; 5 to 15 parts of polyester polyol; 15 to 25 parts of isophorone diisocyanate; 1.5 to 2.5 parts of dimethylolpropionic acid; 3 to 8 parts of a branched flame retardant containing phosphorus, nitrogen and silicon; 0.5 to 2 parts of gamma-(methacryloyloxy) propyl trimethoxy silane; 0.03 to 0.08 part of dibutyltin dilaurate; 1 to 2 parts of triethylamine; and 100 parts of deionized water. A coating prepared from the waterborne polyurethane flame-retardant coating has excellent flame retardance, durable stain resistance, self-cleaning performance and wear resistance.

The invention discloses a waterproof and antibacterial polyester composite fiber and a preparation method thereof, and belongs to the technical field of functional composite fiber materials, the waterproof and antibacterial polyester composite fiber provided by the invention is composed of a three-layer composite structure of a core layer, a middle layer and a shell layer, the middle layer is formed by blending hydrophobic modified silicon dioxide nanoparticles and copolyester; the shell layer is formed by blending a hydrophobic zeolite molecular sieve and a fluorine-containing acrylate copolymer; the preparation method of the polyester composite fiber adopts a bi-component skin-core composite melt spinning method. Through three-layer structural design and component optimization, the waterproof, antibacterial and high-strength synergistic interaction is realized on the polyester fiber for the first time, the durability is remarkably superior to that of the prior art, and an innovative solution is provided for functional textiles.

The invention discloses a preparation method and application of a high-temperature-resistant microcapsule suitable for nylon melt spinning, and belongs to the technical field of fiber materials. The invention aims to solve the problems that the existing phase change microcapsule (PCM) is easy to damage and leak during high-temperature melt spinning of chinlon due to insufficient heat resistance, and the finished fabric is easy to yellow due to illumination. According to the method, silicon dioxide nanoparticles are adopted as a Pickering stabilizer to form an oil-in-water emulsion, isophorone diisocyanate and triethylene tetramine are subjected to a polymerization reaction on an oil-water interface, a high-temperature-resistant polyurea / SiO2 hybrid wall material is formed, and a phase change core material n-octadecane is coated. Compared with the prior art, the microcapsule prepared by the invention is good in thermal stability and can bear a high-temperature environment of nylon melt spinning; the particle size distribution is uniform and ranges from 0.50 mu m to 2.72 mu m, and a spinneret plate is not prone to being blocked; and the wall material does not contain formaldehyde, so that the product safety is high.

The application discloses a PE-RT pipe and a preparation method thereof, and relates to the technical field of building heating and ventilation. The PE-RT pipe comprises an outer layer and an inner layer, the outer layer comprises heat-resistant polyethylene, and the surface of the inner layer is provided with V-shaped convex structures; the inner layer comprises the following components in parts by weight: 75-80 parts of low-density polyethylene A; 20-25 parts of low-density polyethylene B; 5-15 parts of amino-modified silver-loaded silicon dioxide nanoparticles; 0.05-1.5 parts of amino-modified polystyrene microspheres; 5-15 parts of alkyl-modified silicone auxiliary agents with C a a being greater than or equal to 5; 0.5-2 parts of a compatilizer; and 0.5-2 parts of a coupling agent; the low-density polyethylene A is metallocene linear low-density polyethylene. The inner wall of the PE-RT pipe has a micro-nano structure and a low-surface-energy antibacterial and hydrophobic layer at the same time, and has long-lasting and durable hydrophobic and anti-fouling functions.

A method for producing a polyurethane-silicon dioxide composite film, comprising the steps of: (a) Production of polystyrene particles; (b) Production of silicon dioxide polystyrene particles by mixing the polystyrene particles with silicon dioxide nanoparticles; (c) Producing amphiphilic silicon dioxide nanoparticles by subjecting the silicon dioxide polystyrene particles to a first surface treatment, removing the polystyrene particles and then subjecting the remaining silicon dioxide nanoparticles to a second surface treatment, (d) Producing a coating composition by mixing the amphiphilic silicon dioxide nanoparticles with polyurethane; and (e) Applying the coating composition to a surface of a substrate to form a coating layer and hardening the coating layer, the procedure further includes in step (a): Producing a styrene-fluid mixture by introducing a styrene monomer and a solvent into a reactor and stirring under a nitrogen atmosphere for a predetermined time; and Heating the styrene-fluid mixture to a temperature of 60 °C to 70 °C and Addition of an initiator to the reactor and reaction of the styrene-fluid mixture with the initiator, wherein the initiator comprises 2,2'-Azobis(2-methylpropionamidine)dihydrochloride.

The invention relates to the field of packaging materials, in particular to a PS moisture-proof packaging material and a preparation method thereof. The PS moisture-proof packaging material is prepared from the following components in parts by weight: 70 to 80 parts of bio-based composite modified PS, 6 to 12 parts of maleic anhydride grafted polystyrene, 0.2 to 1 part of antioxidant, 0.5 to 1.5 parts of heat stabilizer and 1 to 3 parts of lubricant. According to the packaging material, bio-based composite modified PS is adopted as a core material, silicon dioxide nanoparticles are firmly grafted to a molecular chain through chemical bonds and are uniformly dispersed in a matrix, a strong barrier network is constructed, the mechanical strength of the material is improved, the permeation path of water vapor molecules can be remarkably prolonged, and the mechanical property of the material is improved. Therefore, the water vapor permeability of the material is greatly reduced.

The invention relates to the technical field of preparation of hydrophobic coatings, in particular to a high-durability hydrophobic coating applied to a low-temperature condition and a preparation method of the high-durability hydrophobic coating. The preparation method comprises the following steps: S1, synthesizing a fluorosilicone modified polyurethane polymer solution; s2, synthesizing fluorine modified silicon dioxide nano particles; s3, preparation of the hydrophobic coating: adding the fluorine-modified silicon dioxide nanoparticles into an organic solvent for ultrasonic dispersion, then adding the fluorine-silicon modified polyurethane polymer solution, and stirring at a high speed to obtain the high-durability hydrophobic coating. The prepared hydrophobic coating has no influence on the optical performance of a transparent part after being prepared, and the hydrophobic performance is hardly changed after high-temperature, low-temperature, temperature impact, raining and solar radiation tests, which shows that the hydrophobic coating has excellent low-temperature durability.

The invention discloses a high-temperature-resistant long-acting efficient heat-insulating nano composite material as well as a preparation method and application thereof. The material is prepared from the following raw materials: deionized water, a surfactant, high-temperature-resistant organic silicon water-based resin, silicon dioxide nanoparticles, a fiber base material and chlorosilane, according to the material disclosed by the invention, a silicon-based low-surface-energy hydrophobic coating generated by chlorosilane-containing vapor deposition is formed on the surfaces of the fiber base material and / or the silicon dioxide nanoparticles, and the coating inhibits capillary liquid absorption and water vapor condensation and adsorption and plays a role in fixing and stabilizing the silicon dioxide nanoparticles and the fiber base material; therefore, the moisture absorption failure resistance and pulverization and powder falling resistance of the material are improved; the preparation method is mild in process condition and suitable for large-scale production, and the obtained material has excellent long-acting hydrophobicity, high-temperature dimensional stability and lasting and efficient heat insulation performance and is suitable for the fields of power battery heat insulation plates, building fireproof isolation layers, high-temperature industrial pipeline heat preservation, special heat protection and the like which have strict reliability requirements.

The application discloses a glass surface functional thin film and preparation and application thereof, and belongs to the technical field of film materials. The application discloses a preparation method of a glass surface functional thin film, which comprises the following steps: S1, uniformly mixing ammonium persulfate, sodium dodecyl sulfate and deionized water, heating and stirring to obtain a dispersion liquid; mixing modified silicon dioxide nanoparticles, aluminum oxide nanoparticles and a solvent, ultrasonicating, adding chitosan and stirring to obtain a mixed liquid; mixing the dispersion liquid and the mixed liquid, continuously heating and stirring to obtain a prepolymer; uniformly stirring an initiator into the prepolymer to obtain modified silicon dioxide nanoparticle / aluminum oxide polymer; S2, in an inert gas atmosphere, forming a functional thin film on the surface of a pretreated substrate by a magnetron plating method.

The present application relates to a kind of high light transmittance soft TPU film and its preparation method, the high light transmittance soft TPU film includes polyurethane nanofiber, polydimethylsiloxane nanofiber and hollow rod-shaped silica nanoparticle, the hollow rod-shaped silica nanoparticle is dispersed in polyurethane nanofiber and polydimethylsiloxane nanofiber.It has the micro network structure of being able to make the light transmittance of film significantly improve, also more soft simultaneously;Polyurethane is used in conjunction with polydimethylsiloxane, and the flexibility of film can be further increased;The hollow rod-shaped silica nanoparticle evenly distributed in fiber is due to its special hollow structure, gives it lower refractive index, makes film have higher light transmittance, also further improves the weather resistance of TPU film, especially temperature resistance.

The application belongs to the field of solar cells, and discloses a kind of multilayer silicon dioxide nanoparticles and its preparation method, anti-reflection film and solar cell.The multilayer silicon dioxide nanoparticles include hollow core, silicon dioxide mesoporous intermediate layer and silicon dioxide coating shell.The preparation method of the application is simple, the reaction condition is mild and non-toxic, the efficiency is high, the template agent is removed completely, the porosity of the synthesized multilayer silicon dioxide nanoparticles is high, the light transmission effect is good, the dispersibility is good, and the mechanical strength is good.

The application discloses a kind of super-hydrophobic activated carbon materials, preparation method and application, it is related to activated carbon production technical field, including the following mass parts of raw materials: 70-90 parts activated carbon, 5-15 parts silicon dioxide nanoparticles, 1-5 parts fluorosilane, 3-7 parts reinforcing modifier.The application adds reinforcing modifier in raw materials, dopamine will occur self-polymerization and form polydopamine in alkaline borate buffer solution, by the active functional groups such as a large number of catechol and amino contained in polydopamine, when pretreated activated carbon B is immersed in reinforcing modifier, polydopamine will be deposited on the surface of activated carbon, by active group, more binding sites are provided for subsequent modification particle A self-assembly, enhance the physical adsorption and chemical bonding effect between modification particle A and activated carbon, to enhance the practical use effect of super-hydrophobic activated carbon, and optimize production process in production process, enhance the functionality.

The application provides a corona-resistant polyamide-imide insulating paint and a preparation method and application thereof. The preparation raw material of the polyamide-imide insulating paint comprises aromatic tricarboxylic anhydride, aromatic diisocyanate and alcohol-hydroxyl modified silicon dioxide nanoparticles. The three materials are matched to make the obtained polyamide-imide insulating paint have excellent storage stability before curing, and the silicon dioxide nanoparticles can be uniformly dispersed in the formed insulating paint film and are not prone to agglomeration after curing. Therefore, the enameled wire made of the polyamide-imide insulating paint has excellent corona resistance and excellent flexibility, and is suitable for application in high-voltage motors.

This invention provides an environmentally friendly water-based interior wall coating with a ceramic glaze effect. Based on the total mass of the interior wall coating, the water-based interior wall coating comprises the following components in the following mass percentages: silicone oil-modified acrylic polyurethane copolymer emulsion: 10.0-20.0 wt%; cross-linked nano-inorganic dispersion: 10.0-16.0 wt%; glaze gloss adjusting powder: 1.0-5.0%; pigments and fillers: 30.0-40.0 wt%; cellulose: 0.3-0.5 wt%; hydrophobic agent: 0.5-2.0 wt%; organosilicon additive: 0.5%-1.5%; other additives: 2.5-4.5 wt%; the other additives include at least one selected from wetting agents, dispersants, defoamers, pH adjusters, bactericides and fungicides, film-forming aids, and antifreeze agents; and water: 15.0-35.0 wt%. In the formulation of the water-based interior wall coating, a dense three-dimensional spatial structure of organic polymer-inorganic filler is formed by cross-linking silicone oil-modified acrylic polyurethane copolymer emulsion with silica nanoparticles. This gives the water-based interior wall coating scratch resistance and hydrophobic properties, and, in conjunction with other formulation components, further improves the hardness, abrasion resistance, stain resistance, and environmental performance of the water-based interior wall coating. The hardness of the interior wall coating is H grade, the abrasion resistance is no more than 12, and the stain resistance is I grade.