70 results about "Tio2 particle" patented technology

The invention provides a high-temperature-resistant and corrosion-resistant ammonia water nozzle coating and a preparation method thereof, and belongs to the field of coatings. The ammonia water nozzle coating is composed of a self-repairing metal ceramic bonding layer, an organic-inorganic hybrid corrosion-resistant layer and a functional surface layer which are sequentially arranged in a stacked mode. A coating of the self-repairing metal ceramic bonding layer is composed of the following components of 90-99 parts of NiCrAlY alloy and 1-8 parts of self-repairing microcapsules. A coating of the organic-inorganic hybrid corrosion-resistant layer is prepared from the following components: 40 to 60 parts of fluorinated polyurethane prepolymer, 20 to 40 parts of silicon-aluminum sol, 1 to 8 parts of disulfide bond modified epoxy resin and 10 to 20 parts of magnesium-aluminum hydrotalcite; the coating of the functionalized surface layer is prepared from the following components: 20 to 30 parts of stearic acid modified TiO2 particles, 60 to 80 parts of waterborne polyurethane and 2 to 7 parts of ionic liquid modified SiO2 nanoparticles. The corrosion resistance, the high temperature resistance and the self-repairing capacity of the ammonia water nozzle are improved at the same time.

The invention discloses a single-layer Janus fiber membrane with pore and wettability double gradients and a one-step electrospinning preparation method of the single-layer Janus fiber membrane, and belongs to the technical field of electrostatic spinning functional fiber materials. According to the method disclosed by the invention, polyacrylonitrile (PAN) has weak hydrophilicity, and hydrophobic modification and hydrophilic modification of the PAN fiber membrane can be realized by respectively adding fluorinated titanium dioxide (F-TiO2) particles and tannic acid (TA); gradient regulation and control of pores are realized by regulating and controlling the concentration of the PAN spinning solution. The method comprises the following steps: S1, mixing F-TiO2 particles with PAN to obtain a spinning solution A; s2, mixing TA and PAN to obtain a spinning solution B; s3, the spinning solution A and the spinning solution B are sequentially sucked into the same injector, and a pre-spinning solution C is obtained; and S4, preparing the single-layer fiber membrane through electrostatic spinning. The fiber membrane has a pore / wettability double-gradient structure, shows excellent one-way moisture conduction performance, and has wide application prospects in the fields of personal protection masks, outdoor sportswear and the like.

A high infrared reflectance Cu-TiO2 composite coating and its preparation method are disclosed. The method involves mechanically ball-milling Cu powder and TiO2 powder, wherein the TiO2 mass percentage is 10%–20%. The mixed powder is then deposited onto the substrate surface using cold spraying, preferably with a Ti buffer layer. This invention utilizes the dispersion strengthening, optical synergistic enhancement, and chemical barrier effect of TiO2 particles in the Cu matrix to improve the coating's hardness and wear resistance while simultaneously increasing infrared reflectance. Experiments show that when Cu:TiO2 = 85:15, the coating achieves an absolute infrared reflectance of 94.02% in the 1900–2300 nm wavelength band, higher than pure Cu coatings and existing cold-sprayed Ag and Al coatings. Furthermore, the coating is dense and oxidation-free. This invention features a simple process and low cost, making it suitable for applications such as solar collectors, infrared reflectors, and optical devices.

The invention relates to the technical field of photocatalytic ozonation coal chemical industry wastewater treatment, in particular to a preparation method and application of a soapstone / TiO2 particle composite catalyst with a mesoporous-macroporous two-stage aperture structure, and the method comprises the following steps: adding an ethanol solution of butyl titanate into a viscous turbid liquid of alginate and soapstone, uniformly mixing, and then adding an ethanol solution of titanium dioxide into the viscous turbid liquid of alginate and soapstone; a catalyst precursor sol solution is obtained; dropwise adding the catalyst precursor sol solution into a polyvalent metal salt solution to prepare spherical gel of soapstone and butyl titanate sol; and carrying out acid leaching, drying and calcining on the spherical gel of the soapstone and the butyl titanate sol to obtain the soapstone / TiO2 particle composite catalyst of which the surface is of a mesoporous-macroporous two-stage aperture structure and the interior is honeycomb-shaped. The soapstone and the butyl titanate sol are compounded by adopting an alginate template method, a mesoporous-macroporous hierarchical structure is formed on the surface of the catalyst, a honeycomb shape is formed inside the catalyst, the porosity and the catalytic activity of the catalyst are improved, and the catalyst still keeps relatively high catalytic activity and physical and chemical stability after being recycled for multiple times, so that the catalyst has a good application prospect. The method is suitable for fields of environmental protection and sewage treatment.

This invention relates to the field of nickel electrode paste preparation technology, and discloses an ultrafine roller-printed nickel paste for ultra-high capacitance MLCCs and its preparation method. The nickel paste includes nickel powder, Ni3Sn-coated nickel powder, diffusion barrier phase, resin, solvent, dispersant, and rheology modifier. The Ni3Sn-coated nickel powder is obtained by chemical plating, where Sn is bonded to Ni in the form of an intermetallic compound. The diffusion barrier phase is selected from nano-ZrO2 or TiO2 particles. After pre-dispersing each solid component with a portion of the dispersant and solvent, the mixture is ground and dispersed using a gradient grinding process, then mixed with an organic carrier to form a paste. After vacuum degassing and filtration, the nickel paste is obtained. This invention uses Ni3Sn-coated nickel powder to replace elemental Sn powder, inhibiting the formation of a dense SnO2 passivation layer. Combined with the blocking effect of the diffusion barrier phase at the grain boundaries and the protection of the coating layer integrity by the gradient grinding process, this invention solves the problem of long-term reliability degradation of MLCCs caused by Sn storage.

The application discloses a display screen functional film and a preparation method and application thereof, and belongs to the technical field of functional film materials. The method comprises the following steps: S1, SiO2 nanoparticles, ethanol, acetonitrile, polyvinylpyrrolidone and deionized water are mixed, and ultrasonic dispersion is carried out to obtain a dispersion liquid; tetrabutyl titanate is slowly added into the dispersion liquid, heating and stirring are carried out, and washing, drying and annealing are carried out to obtain SiO2@TiO2 particles; the SiO2@TiO2 particles, an epoxy-containing silane coupling agent and methanol are mixed, heating and stirring are carried out, and washing, drying and annealing are carried out to obtain modified SiO2@TiO2 particles. S2, the modified SiO2@TiO2 particles, 4,4'-diamino diphenyl sulfone and a leveling agent are dispersed in methyl isobutyl ketone, mixing is carried out, ultrasonic defoaming is carried out, and a coating is obtained; the coating is uniformly coated on an optical film, and the functional film with good light transmission, ultraviolet resistance and hydrophobicity is obtained after temperature rising and drying.

To provide a water-in-oil type emulsion cosmetic composition which has high dispersibility of metal oxide particles in a liquid oil, is less likely to cause caking, and has strong high-temperature stability even when no silicone oil is used or only a small amount of a silicone oil is used.A water-in-oil type emulsion cosmetic composition includes the following components: surface-treated zinc oxide particles, surface-treated titanium oxide particles, polyhydroxystearic acid, polyricinoleic acid polyglycerol ester, an organically modified clay mineral, an aqueous component, and a liquid oil, wherein a content of the polyhydroxystearic acid is less than 1.0 mass %, and a content of the aqueous component is less than 15 mass %.

A silicone coating film provided as a surface layer of an irradiated object exposed to ultraviolet irradiation, includes a silicone rubber as a base material and titanium oxide particles with an average particle size of less than 100 nm. A laminated structure includes a first layer including a silicone rubber as a base material, and a second layer laminated on the first layer, wherein the second layer is the silicone coating film.

An asphalt-based sealcoat composition comprising high levels of titanium oxide particles is provided. In some embodiments, a highly solar reflective asphalt-based sealcoat composition comprising high levels of titanium oxide particles is provided. In some embodiments, an asphalt-based sealcoat composition capable of reducing pollutants comprising high levels of titanium oxide particles is provided. In some embodiments, methods for preparing asphalt-based sealcoat compositions as well as their application to asphalt surfaces is provided.

The invention relates to a super-hydrophilic-antistatic integrated inorganic nano photovoltaic body effect coating as well as a preparation method and application thereof.The coating is prepared from the following raw material components in percentage by mass: 30%-50% of an inorganic nano base material, 15%-25% of composite nanoparticles, 3%-8% of an antistatic agent, 1%-3% of a dispersing agent, 2%-5% of a curing agent and the balance of deionized water; the inorganic nano base material is a compound system of silica sol and aluminum sol, and the mass ratio of the silica sol to the aluminum sol is (3-5): 1; the composite nano particles are a mixture of nano SiO2 particles and nano TiO2 particles, and the mass ratio of the nano SiO2 particles to the nano TiO2 particles is (2-4): 1. The coating not only realizes synergistic improvement of super-hydrophilicity and antistatic performance, but also can adapt to domestic nanoparticles; in the application of high-pollution and low-dip-angle photovoltaic modules, the dust residual rate is smaller than or equal to 5%, the power generation capacity of the modules is increased by larger than or equal to 3%, no yellowing or cracking occurs through 1500h aging tests, and the effective service life is larger than or equal to 6 years.

The invention discloses a solarization-resistant polyester fiber and a preparation method thereof.The solarization-resistant polyester fiber is obtained by finishing polyester fiber through a composite finishing agent, and the composite finishing agent is prepared from, by weight, 0.1-1 part of graphene oxide, 1.75-7.0 parts of composite coating TiO2 particles and 2.5-10 parts of 3-methacrylamide dopamine. And 75 to 300 parts of deionized water. According to the invention, the polyester fiber is modified by adopting the composite finishing agent, and a modified protective film layer is formed on the surface of the polyester fiber, so that the polyester fiber with greatly improved solarization resistance is obtained; through treatment of the composite finishing agent, the anti-ultraviolet performance and the anti-aging performance of the polyester fibers can be remarkably improved, and through the self-repairing performance provided by the formed modified protective film layer, the solarization resistance can be further enhanced.

The application belongs to the field of inorganic functional materials, and particularly relates to a TiO2 film with lotus leaf surface structure and a preparation method thereof. The TiO2 film with lotus leaf surface structure is composed of dispersed sub-micron-sized TiO2 microspheres and a continuous film matrix, and the dispersed TiO2 microspheres are locally inlaid in the film matrix; the TiO2 microspheres are composed of nano-sized TiO2 particles. The TiO2 film with lotus leaf surface structure is prepared by using a sol containing tetra-n-butyl titanate complex and TiO2 colloidal particles as a precursor, and through phase separation of a sol liquid film formed by one-step dip-coating in a solvent evaporation process. The size and distribution density of the TiO2 microspheres on the hierarchical structure surface can be conveniently controlled by controlling the content of the TiO2 colloidal particles in the sol system.

The present invention describes a method for the realization of an antimicrobial membrane based on electrospun polydimethylsiloxane fibers (ROMS) functionalized with Titanium dioxide (TiO2) particles. The invention also describes the crystallization of these TiO2 particles on the surface of ROMS fibers by hydrothermal reaction, the properties of the membrane thus obtained and the numerous hygienic-sanitary applications of the same.

The present invention belongs to the field of materials production, and more specifically to a method for obtaining titanium oxide (TiO2) particles having a size that may preferably be selected between 0.5 and 3 μm and a low size dispersion (less than approximately 5% with respect to the average size). The synthesis route consists of controlled hydrolysis with an aqueous medium of hydrolysable titanium oxide precursors dissolved in solvents that are able to form complexes with the titanium oxide precursors and which have been pre-treated to remove wastewater and thus be able to access a wide range of experimental conditions. This synthesis route makes it possible to obtain monodisperse TiO2 microparticles at room temperature, easily, quickly, with low energy consumption and more efficiently. Furthermore, at an industrial level, the method is easily scalable.

The invention belongs to the field of self-cleaning coatings, and provides self-cleaning anti-dust-deposition glass and a preparation method thereof.According to the self-cleaning anti-dust-deposition glass and the preparation method thereof, hydroxyl is formed on the surface of the glass through pretreatment, the glass is better combined with a coating solution subsequently, TiO2 particles of a micro-nano structure (the micro-nano structure that nano TiO2 is loaded on micron TiO2) are prepared, and the self-cleaning anti-dust-deposition glass is obtained. The preparation method comprises the following steps: firstly, preparing TiO2 particles with a micro-nano structure, then carrying out super-hydrophobic modification on the TiO2 particles with the micro-nano structure, preparing a spraying solution from the super-hydrophobic TiO2 particles and PDMS, and finally, spraying the spraying solution onto glass with hydroxyl to obtain the self-cleaning anti-dust-deposition glass. The coating does not contain fluoride and is environmentally friendly; the binding force of glass pretreatment and the coating is improved; tiO2 has a photocatalytic self-cleaning effect and can degrade oil stains on the surface of the assembly; the super-hydrophobic TiO2 micro-nano particles have micron-scale and nano-scale structures at the same time, and the hydrophobic capacity is higher; and the leveling agent is added, so that the coating is more stable.

The application relates to a sodium titanate nanofiber / reduced graphene oxide composite electrode material and a preparation method and application thereof. The composite electrode material has a two-dimensional sheet structure, the particle size is 1-6 mu m, the thickness is 10-20 nm, is composed of a few-layer reduced graphene oxide and sodium titanate nanofibers with a diameter of 5-10 nm loaded on the reduced graphene oxide, and is prepared by taking the few-layer reduced graphene oxide as a template, uniformly loading titanium dioxide particles, and then carrying out hydrothermal treatment in an alkali solution. Compared with the prior art, the synthesis method is simple in process, easy to scale up, and high in controllability. As a negative electrode of a sodium ion battery or a positive electrode of a sodium battery, the sodium titanate nanofiber / reduced graphene oxide composite electrode material has the advantages of high initial coulomb efficiency, low working voltage, high capacity, excellent rate characteristics and cycle stability, and has a broad market application prospect.

A preparation method of a biaxially oriented micro-foaming diffusion film comprises the following steps: S1, mixing polyester chips and an olefin foaming agent according to a mass ratio of (15-17): 1, and carrying out melt blending and extrusion granulation in a single screw extruder to obtain core layer foaming agent master batches; s2, mixing polyester chips, core layer foaming agent master batches and TiO2 particles according to the mass ratio of (100-90): (1-2): 1, and performing melt blending and extrusion granulation in a single-screw extruder to obtain core layer master batches; s3, uniformly mixing polyester chips, matte particles and cross-linked microspheres according to a mass ratio of (1-2): (4-6): 1 to obtain surface master batches; and S4, after crystallizing and drying the core layer master batch and the surface layer master batch, respectively feeding the core layer master batch and the surface layer master batch into a main extrusion machine of a three-layer co-extrusion extruder and an auxiliary extrusion machine of the three-layer co-extrusion extruder, carrying out three-layer co-extrusion sheet casting and two-way asynchronous stretching forming, and then dragging and rolling to obtain the two-way stretching micro-foaming diffusion film.

The invention relates to the field of spinning, and particularly discloses a spinning and continuous dyeing and finishing process of a color master batch fabric. A spinning and continuous dyeing and finishing process of a color master batch fabric comprises the following specific steps: preparing color master batches: mixing dimethyl terephthalate, propylene glycol, a pigment, an anti-ultraviolet-oxidant, a coupling agent and a catalyst, uniformly stirring, vacuumizing, and heating for reaction to obtain the color master batches; the color master batch and polyester chips are mixed to form a spinning mixture, heating melt spinning is conducted, titanium dioxide particles are added in the spinning process, then air blowing cooling shaping and oiling bundling are conducted in sequence, the concentration of an oiling agent is 10%-13%, the oil content is 0.4%-0.75%, colored textile fibers are formed through drafting false twisting and winding, and the colored fabric is formed after spinning; according to the method, spinning and dyeing of the fibers are completed synchronously, the production process is shortened, and meanwhile the prepared colored fabric has good color fastness.

Provided are a titanium oxide particle-metal particle composition having a higher photocatalytic activity than before, and exhibiting a high antimicrobial property regardless of whether or not it is under light irradiation; and a method for producing such composition. The composition contains two kinds of particles which are:(i) titanium oxide particles with the surfaces thereof being modified by an iron component and a silicon component that are not solid-dissolved in the titanium oxide particles; and(ii) antimicrobial metal-containing metal particles.

The invention belongs to the technical field of fresh-keeping materials, and relates to nano-cellulose-based daytime radiation refrigeration coating liquid as well as a preparation method and fresh-keeping application thereof in paper-based fruit and vegetable packaging. Aiming at the problems of high viscosity and poor leveling property of the phosphorylated cellulose nanofiber coating liquid, the coco-glucoside is used for weakening the hydrogen-bond interaction between phosphorylated cellulose nanofibers to reduce the entanglement density, and meanwhile, the surface charge and steric hindrance of TiO2 particles are adjusted to synergistically optimize the rheological property of the system; on the other hand, the wetting and spreading capabilities of the coating liquid on a corrugated paper base material are remarkably improved due to the low surface tension; the coco-glucoside induces to form a highly-communicated micro / nano-scale air pore channel structure in the film forming and drying process, and efficient scattering and reflection of a solar spectrum are realized by utilizing the refractive index difference between air and a phosphorylated cellulose nanofiber matrix; meanwhile, the porous network provides a uniform loading platform for TiO2, an'air-phosphorylated cellulose nanofiber-TiO2 'triple light scattering interface is constructed, and the visible light wave band reflectivity is further enhanced.

A spiral jet mill for grinding granular products, such as TiO2 particles, comprises a plurality of product injector nozzles, for example, at least two, for injecting a corresponding number of flows of steam or other pressurized gas and granular products into the grinding chamber while mixing them. In use, to achieve energy savings with respect to the amount of steam or other pressurized gas used per unit of granular product being ground, the ratio of the total amount of pressurized gas, for example, the sum of all input steam and grinding steam injected into the grinding chamber, to the granular product, such as TiO2 pigment particles, is preferably smaller than the corresponding ratio used in conventional processes.

An ink composition and luminescent nanostructure composite, and an electronic device including the luminescent nanostructure composite. The ink composition includes a plurality of titanium oxide particles, a plurality of luminescent nanostructures (e.g., quantum dots), a monomer including a carbon-carbon unsaturated bond, and optionally an organic solvent. The titanium oxide particles have an average size of greater than or equal to about 10 nm and less than or equal to about 900 nm, and the titanium oxide particles comprise an organosilane compound. The ink composition has a total solid content (TSC) of greater than or equal to about 90 wt %, and an amount of the titanium oxide particles in the ink composition is greater than or equal to about 1 wt % based on the total weight of the ink composition. The ink composition is configured to emit a first light.

The purpose of the present invention is to obtain low-order titanium oxide particles having a novel crystal composition.　The present invention involves a method for producing particles, said method comprising a step for heating a mixture containing TiH2 and TiO2 at a temperature of 700-950°C, wherein the molar ratio of TiO2 to TiH2 contained in the mixture is 5.0-6.8.

The present invention relates to the use of TiO2 particles bearing a metal and / or a metal oxide for obtaining alkenes by photocatalysis. The present invention also relates to a process for obtaining alkenes by photocatalysis of carboxylic acids and / or alcohols in the presence of a catalyst based on TiO2 particles bearing a metal and / or a metal oxide.

This invention discloses a PVDF-TiO2 micro / nano bidirectional selective separation coating membrane, its preparation method, and its applications, belonging to the field of solid material surface modification technology. By controlling the curing time of the PVDF coating, TiO2 nanoparticles are sprayed onto the coating in a semi-dry state. Utilizing the viscosity differences of PVDF at different curing degrees, the TiO2 particles are partially embedded in the PVDF matrix and partially exposed on the surface, forming a unique semi-embedded and semi-exposed structure. By precisely adjusting the curing time and optimizing the embedding depth of TiO2, a coating membrane with superhydrophilic / superoleophilic properties in air, superoleophobic properties underwater, and superhydrophobic properties underwater is obtained. This membrane, through pre-wetting to induce surface state transition, can achieve bidirectional selective separation of oil-in-water and water-in-oil emulsions, as well as the separation of immiscible oil-water mixtures, and exhibits excellent recyclability, corrosion resistance, and mechanical stability.

The invention discloses preparation and application of a super-strong light-resistant hydrophobic nano lignin / SiO2-TiO2 wood protective coating, and belongs to the technical field of wood functional modification. According to the preparation method disclosed by the invention, firstly, tetraethoxysilane is taken as a silicon source, and the surfaces of nano TiO2 particles are coated with SiO2 layers, so that the SiO2-TiO2 composite particles with core-shell structures are prepared, and the problems that nano TiO2 is easy to agglomerate and poor in dispersity are solved. Then, alkali lignin is subjected to quaternization modification, and quaternization lignin nano particles (QAL-LNPs) are prepared. And finally, the QAL-LNPs and the SiO2-TiO2 particles are jointly dispersed in a mixed solution composed of absolute ethyl alcohol, a silane coupling agent and a water repellent agent to form a stable composite coating solution, the stable composite coating solution is sprayed to the surface of the wood, and the composite coating is obtained after curing. The coating endows wood with excellent ultraviolet aging resistance and good hydrophobicity, and is suitable for surface protection of outdoor wood products and wood structure buildings.

The application relates to the field of degradable plastics, and discloses a degradable polyethylene composition and a preparation method thereof, the degradable polyethylene composition being made by melt mixing modified polyethylene resin and modified starch particles; the modified polyethylene resin being made by melt mixing low-density polyethylene, ZnO-TiO2 particles and oxidized polyethylene wax; the modified starch particles being made by melt mixing glycerol, corn starch and modified montmorillonite; the ZnO-TiO2 particles being prepared by preparing TiO2 particles by a sol-gel method and being made by an in-situ growth method; and the modified montmorillonite being made by using 2-bromoethylamine hydrobromide, dichlorophenyl phosphate, 4-bromo-triphenylamine and dodecyl dimethyl tertiary amine as raw materials to prepare triphenylamine quaternary ammonium salt intercalated montmorillonite, the modified starch particles and the modified polyethylene resin are compounded to prepare a photo-biological degradable composition, and the photo-biological degradable composition has good mechanical properties, antibacterial effect and flame-retardant performance.

This invention relates to a sandwich composite structure filter membrane substrate surface-enhanced Raman scattering (SERS) chip, its preparation method, and its applications. The chip uses a microporous filter membrane as a flexible substrate, and from bottom to top, it comprises a photocatalytic support layer composed of flower-like TiO2 particles, an intermediate functional layer composed of few-layer porous g-C3N4, and a surface-enhancing layer composed of gold nanostars. The TiO2 and g-C3N4 form a tight interface structure, and the gold nanostars are loaded on the g-C3N4 surface. The chip is assembled layer by layer using a combination of vacuum filtration and spin coating. This composite structure combines molecular adsorption, surface-enhanced Raman detection, and photocatalytic degradation functions, enabling the removal of residual molecules on the substrate surface and restoration of SERS active sites after detection, thereby improving the substrate's reusability. The preparation method of this invention is simple and low-cost, making it suitable for fields such as environmental monitoring.

The utility model provides a kind of preparation device of nanometer titanium oxide particle sol, the preparation process of titanium oxide particle sol is controlled using full membrane method process, specific content includes: dynamic microporous ceramic membrane feed, dynamic rotation+microporous penetration, realize the high homogenization of reaction system;Dynamic ceramic membrane separates, concentrates and washes intermediate product, and the intermediate product is purified;Dynamic microporous ceramic reactor carries out on-line particle classification to reaction product, realizes the homogenization of product particle;Efficient separation alcohol and water by pervaporation membrane, realize the reuse of alcohol.The reactant is added in the device using membrane reactor D1 (dynamic rotating membrane reactor), so that the reactant is more evenly dispersed in the system, and the product particle size distribution is too wide due to local concentration being too high or too low is inhibited.

The invention discloses a preparation method and application of a Cu2O / TiO2 composite nano antibacterial coating, the preparation method comprises the steps of preparation of Cu2O / TiO2 composite nano particles, preparation of a hydrophobic modified composite Cu2O / TiO2 particle suspension and preparation of the Cu2O / TiO2 composite nano antibacterial coating, and the preparation method can be applied to the fields of medical implant materials, food contact materials and building exterior wall materials. The prepared antibacterial coating breaks through the limitation of a single mechanism of a traditional antibacterial material, has self-cleaning, high durability and broad-spectrum antibacterial property, can effectively reduce the risk of drug-resistant bacterium infection, is suitable for medical implants, food contact materials, building exterior wall materials and other scenes, and has wide application prospects. The method has important scientific and application values for promoting the development of a composite antibacterial coating technology and guaranteeing public health safety.