2650 results about "Gel method" patented technology

The present invention relates to a polymer nano-composite of the functional inorganic nano-particle with intermingle prepared by electrospinning method, and the use of the composite. The precursory sol of the functional inorganic nano-particle is prepared by the sol-gel method, and is mixed with the polymer solution to form spinning fluid, adding precursor of dopant if necessary, and then the mixed spinning fluid is sprayed on to the electric collecting board with the action of the electric field force by electrospinning method to obtain functional polymer nano-composite with intermingle. The equipment of the invention is simple, the operation is easy, the components, structure and characteristics of the composite is easy to control, the structure is stable, the inorganic nano-particle is dispersed uniformly. According to the difference of the functionality of the inorganic nano-particles, the composite can be used in conducting material, antistatic material, magnetic material, electrochromic material, photocatalysis and ecology environment material, antibiosis material and biomaterial.

The invention discloses a porous titanium dioxide/graphene composite material and a preparation method thereof. The preparation method comprises the steps of: adding aniline and graphene into a surfactant-containing protonic acid solution according to a certain ratio; preparing a nanometer polyaniline/graphene composite material through an in-situ polymerization method; preparing titanium dioxide sol by using a sol-gel method; adding 0.05-0.20g of nanometer polyaniline/graphene composite material into 50mL of sol, uniformly mixing; standing and aging the sol for 3-5 days; drying in a drying oven at the temperature of 60-120 DEG C; milling; calcining the obtained composite for 30 minutes -2 hours at the temperature of 200-550 DEG C; and removing the polyaniline, thereby obtaining the porous titanium dioxide/graphene composite material. According to the invention, the porous titanium dioxide/graphene is prepared by utilizing the nanometer polyaniline and the titanium dioxide is deposited on the graphene, so that the contact area of the titanium dioxide and pollutants is increased, the separating efficiency of photo-generated electrons and holes is improved and the photocatalytic efficiency is improved.

The invention discloses a graphene-containing insulated radiating composition and preparation and application thereof. The composition comprises the components of silica-coating graphene, insulated heat-conducting filler, a surface treating agent, and a function additive. The preparation method comprises the following steps of: hydrolyzing ethyl silicate on the graphene surface by the sol-gel method to obtain graphene coated with a silica film on the surface; adding the surface treating agent to a mixture of the insulated heat-conducting filler and modified graphene; uniformly agitating; then adding the function additive; and uniformly dispersing to obtain the insulated radiating composition. The composition has the advantages that the graphene is processed by insulating and coating, and the insulated heat-conducting filler and additive of other forms are coordinately added, thus the composition shows high radiating improvement effect in the plastic cement and coating fields; and the composition can be widely applied to a heating element and a radiating facility of various electronic products and electrical equipment, and can greatly improve the radiating effect as well as prolong the service life of devices.

The invention discloses an organic-inorganic hybrid super-hydrophilic coating as well as a preparation method and an application thereof. The preparation method comprises: firstly carrying out hydrolysis condensation polymerization by a sol-gel method with ethyl orthosilicate used as a precursor, hydrochloric acid used as a catalyst, ethanol used as a solvent, a silane coupling agent used as a modifier and a proper amount of water to obtain a modified silica sol, then carrying out free radical polymerization on the modified silica sol and reactive hydrophilic monomers to obtain an organic-inorganic hybrid material, and carrying out solvent replacement to obtain an aqueous organic-inorganic hybrid super-hydrophilic coating. The coating is coated on plastics, glass or metal substrates through dipping or brushing to form a coating layer, the coating layer has a contact angle with water less than 5 degrees, the adhesion force with the substrates of level-0 and the hardness greater than 6H, and water drops can spread out quickly on the coating layer.

The present invention relates to nano mesoporous and mesoporous-macroporous biological glass produced and through surfactant self-assembling and sol-gel process under mild reaction condition and possessing excellent bioactivity. The new type of biological glass has controllable mesoporous structure, homogeneous and adjustable mesopore distribution, relatively great specific surface area and porosity, macropores with adjustable size and porosity, and controllable shape. The present invention may be used as bone repairing material, dental material and rack material in tissue engineering and for medicine embedding and controlling releasing, etc.

The invention discloses a fiber mat, comprising 50-100 (weight ratio accounting for the dried fiber mat and the same below) glass fiber and chopped strands, and one or more of 0.1-30 inorganic fibers, 0.1-30 natural fibers, 0.1-30 synthetic fibers, 0.1-30 manmade fibers and an anti-radiation material besides the glass fibers and the chopped strands. The fiber mat is prepared by a needle punching method, a spun lacing method, a thermal rolling method, a wet type paper-manufacturing acid process, a wet type paper-manufacturing thickener method, a wet type paper-manufacturing gel method and the like. According to the preparation method for the fiber mat disclosed by the invention, the conductive thermal coefficient of a vacuum thermal insulation plate made of the fiber mat achieves 25-65% under the premise of adopting the same production mode, and a more superexcellent thermal insulation effect is obtained.

The gel method of printing variable information of the present invention involves applying inks onto a substrate that is part of or attached to a cylinder of the printing machine. Imaging is by means of an energy source in the UV, visible or infrared regions, modulated to represent a digital image pattern that has been composed on a computer. The consequence of imaging is to gel the ink and increase its adhesion to the substrate of the printing cylinder. The non-gelled background ink with lower adhesion is then removed by a squeegee action and returned to an ink reservoir. The remaining image is transferred to an offset blanket or directly to print stock by pressure. The process does not use a master, but produces an image that is erased after printing with each cylinder rotation so that the next rotation producing the next print can have fresh information written upon it.

The invention provides a composite material containing a perovskite structure oxide, a preparation method and application thereof. The composite material contains, by weight, 20%-99.99% of the perovskite structure oxide and 0.01%-80% of an oxygen ion conductor oxide. According to the invention, a sol-gel method can be employed to prepare the perovskite structure oxide, a combustion method can be employed to prepare the oxygen ion conductor oxide, and then the perovskite structure oxide and the oxygen ion conductor oxide can be mixed uniformly by means of ball milling or mechanical grinding, thus obtaining the composite material. The invention also relates to application of the composite material in solid oxide fuel cells and solid oxide electrolysis cells.

The invention relates to magnetic silicon dioxide microspheres with a nuclear shell and surface anisotropic double functional groups and a preparation method thereof. The preparation method comprises the following steps of: preparing superparamagetic microspheres by a solvothermal process; preparing magnetic microspheres which are coated by silicon dioxide by a sol-gel process; preparing the magnetic silicon dioxide microspheres of which the surface has amino group by taking the magnetic silicon dioxide microspheres as seeds and by the copolycondensation of alkyl ester orthosilicate and a silane coupling agent, and drying the magnetic silicon dioxide microspheres to obtain samples; and by a PICKERING emulsion technology, stabilizing a paraffin/aqueous emulsion system with a micrometer scale by using the aminated magnetic microspheres to form single-layer close packing of the magnetic microspheres on the surface of paraffin spheres, then reacting the amino group on the surface of the magnetic microspheres which is exposed in a liquid phase with succinic anhydride to introduce carboxyl into the partial surface of the microspheres, so that the surfaces of the magnetic microspheres have the anisotropic double functional groups. The obtained magnetic microspheres with the double functional groups have the advantages that: magnetic responsiveness is high; grain size can be controlled between 200 and 800 namometers; and the density of the surface functional groups can be adjusted.

The invention discloses Lyophobic and oleophylic micro nano-coatings applied to oil filtering dehydration and a preparation method thereof. Base material of the coatings is metal mesh grid with 50-1800 meshes, the surface of the metal mesh grid is coated with a layer of dense micro nano-coating which is dense thin film composed of nano silica global particles with partical size ranging from 90nm to 500nm.In the method of the invention, the sol-gel method is adopted, tetraethyl ester serves as the precursor, ammonia water serves as the catalyst, ethanol serves as the solvent, alkyl oxosilane serves as lyophobic modifier, the method of hydrolytie polycondensation is adopted to obtain lyophobic nano silica sol, the process of impregnation or spraying is adopted to coat the gel on the metal mesh grid with 50-1800 meshes, after thermal treatment, oil-water separation net with lyophobic and oleophylic properties is obtained. The method of the invention features simple process, no harm to the environment, no need of fluorine material, wide application to coalescing separator as a separation filter element and the function of filtration and dehydration of oil.

The invention provides a phase-change energy-storing wax microcapsule material used in the building field, which is characterized in that a capsule wall at the inner layer is made of tripolycyanamide modified urea resin and an outer layer is made of silicon dioxide, and the inner layer and the outer layer totally account for 20-45% of the total mass of a microcapsule; and a phase-change materials is an organic phase-change material and accounts for 80-55 percent of the total mass of the microcapsule. A core material is subjected to heat-conduction modification by adopting graphite, the surface of the microcapsule is modified by adopting a sol-gel method to ensure that the dual-layer microcapsule phase-change material used in the building field has better mechanical strength, heat conduction property and hot oxygen stability. The phase-change energy-storing wax microcapsule material provided by the invention has the advantages of low cost and wide source range of the raw materials; and the building wall body material with a self-temperature-regulating function is prepared by doping the phase-change microcapsule material into gypsum.

The invention relates to a preparation method of a composite material prepared by graphene oxide and magnetic mesoporous silica microspheres through chemical bonding interaction. The magnetic particles are prepared by a hydrothermal process; after acid ultrasonic treatment, the magnetic particles are firstly coated with a thin silicon oxide shell layer by a sol-gel method; after that, long-chain alkane is taken as a pore-forming agent, the magnetic particles are copolymerized with tetraethyl orthosilicate (TEOS) in the sol-gel reaction, and then the pore-forming agent is removed by thermal etching, so that the magnetic mesoporous silica particles with certain hydroxyl on the surfaces can be obtained; polyetherimide (PEI) surface modification is carried out on the magnetic mesoporous silica particles, and strong interaction between PEI and silicon hydroxyl is utilized; finally, the carboxyl on ethylene dichloride (EDC) activated graphene oxide reacts with amino on the PEI, so that the graphene oxide magnetic mesoporous silica composite material can be obtained. The preparation method is simple, convenient and controllable and is favorable for amplification preparation. The composite material has large specific surface area and good magnetic controllability, and can adsorb humic acid and heavy metal ions Pb (II) at the same time by virtue of surface groups.

The invention discloses technology of preparing aluminium oxide based continuous fibers by a sol-gel process, which is characterized by adding one or more organic acid containing 1-8 carbon atoms into distilled water, adding aluminum powder and a catalyst after the mixture is evenly mixed and ensuring the mixture to react under the conditions of continuous stirring and reflux condensation under certain temperature to obtain transparent aluminum carboxylate solution; evaporating redundant organic acid in the aluminum carboxylate solution and then adding a solvent, a silicon-containing additive and a given quantity of spinning assistants to obtain precursor solution of aluminium oxide based fibers; concentrating the solution to obtain precursor sol of spinnable aluminium oxide based fibers; spinning by a dry or wet method to obtain aluminium oxide based continuous precursor fibers containing organics; and drying and sintering the precursor fibers to obtain the aluminium oxide based fibers. The aluminium oxide based continuous fibers prepared by the technology can be used in reinforcement in the composite, further improve the strength, ductility and heat resistance of the material and are widely applied in the fields of aerospace, automobile and the like.

The invention relates to a manufacturing method for continuous direct spinning fine denier yarn by uhmwpe jelly method, belonging to the spinning area and solving the problem that the single yarn or yarn beam generated by prior technology is on the high side and bad uniformity so that the difficulty for stability of manufacturing and quality of subsequent product is enhanced and the applicable range is limited. The method is provided with reasonable and compact process flow, stable process control, skillful operation and improving the quality and uniformity of product. By the method continuous stable spinning in line is realized in process parameters and the production efficiency is improved. The labor cost and intensity are lessened. Because there is less turnover link in the middle of process it is favor of decreasing producing consumption and uncontrollable factors. Under the stable running, uhmwpe fine denier yarn or yarn beam with even and stable quality, and good performance is provided.

This invention relates to catalysts comprising a catalytic metal deposited on a composite support with well-dispersed chemical “anchor” species acting as nucleation centers for catalytic metal crystallites growth. The catalysts have the advantage that the average catalytic metal crystallite size can be controlled by the molar ratio of catalytic metal to chemical “anchor,” and is not limited by the porous structure of the support. A preferred embodiment comprises a cobalt-based catalyst on a silica-alumina support made by a co-gel method, wherein its average pore size can be controlled by the pH. The alumina species in the support most likely serve as chemical “anchors” to control the dispersion of cobalt species, such that the average cobalt crystallite size can be greater than the average pore size.

The invention discloses a method for preparing a molecularly imprinted TiO2/WO3 composite photocatalyst with visible light response through a direct method. The method is as follows: a titanium alkoxide is used as a sol and functional monomer precursor, an organic pollutant is used as a template molecule, absolute alcohol is used as a solvent, glacial acetic acid is used as an inhibitor, a sol-gel method is adopted, and the materials are prepared according to a certain ratio, wherein the molar ratio of the template molecule to Ti is 1:20-1:10, and the titanium alkoxide, absolute alcohol, glacial acetic acid and water are mixed in a volume ratio of 10:19:8:4. The method has the following technical effect: the titanium alkoxide has double functions, namely the titanium alkoxide can be used as a titanium source and can also be used as a functional monomer in the hydrolysis process. Other organic functional monomers are not required.

The invention discloses a meso-porous silicon nano-drug carrier with both reduction responsiveness and targeting ability and a preparation method thereof. Firstly, meso-porous silicon nano-particles are prepared with a sol-gel method, and are developed into a nanometer reservoir of drug molecules; then a disulfide bond is introduced into the surface of the meso-porous silicon nanometer reservoir with a simple chemical modification method and is used as a cohesive tie; secondarily, a biocompatible natural extracellular matrix-collagen molecule is creatively fixed to the surface of the meso-porous silicon nanometer reservoir and is developed into a nanometer encapsulator of the meso-porous silicon nanometer reservoir; and finally a lactobionic acid molecule is modified to the surface of a meso-porous silicon/collagen nanometer compounding system and is used as a specificity receptor of a liver cancer cell membrane surface receptor (ASGP-R) so as to construct a meso-porous silicon/collagen-lactobionic acid multifunctional compound type nano-drug carrier system with both cell specificity targeting ability and reducing substance/enzyme responsiveness.

The present invention pertains to a method for preparation of superhydrophobic timber on the basis of a sol-gel method, and the method is as follows: (1), silica sol synthesis, to be more specific, materials are prepared in the volume ratio of ammonia to anhydrous ethanol to ethyl orthosilicate of 1:15 to 17:1; (2), hydrophobic modification of monodispersed nano silica sol, to be more specific, hexadecyl trimethoxysilane, or triethoxysilane-1H, 1H, 2H, 2H-heptadecafluorodecyl silane is used for hydrophobic modification of the synthesized monodispersed nano silica sol, and the hydrophobic agent promotes mutual aggregation of nanoparticles to promote the formation of aggregates of silica nanoparticles; and (3) timber coating processing, to be more specific, the timber surface is coated with the hydrophobically modified silica sol solution by dipping or spraying process. Contact angles of the processed timber surface and water droplets are greater than 150 degrees, roll angles are less than 10 degrees, and a superhydrophobic film has good resistance to acid and alkali erosion and stability in high-humidity environment. The method is simple in operation, less demanding on equipment, and capable of scale production, and has wide market prospects.

The invention belongs to the technical field of superhydrophobic materials, and particularly relates to a preparation method of a highly transparent wear-resistant superhydrophobic composite coating. Surface-modified nano-silica powder prepared by a sol-gel method is dispersed in anhydrous ethanol to obtain a superhydrophobic coating solution. The surface of a substrate of stone, metal, glass and the like is coated with reactive-diluent-modified E-51 epoxy resin glue, standing is carried out for 1 to 2 hours at room temperature, the superhydrophobic coating solution is used for brushing to obtain the highly transparent wear-resistant superhydrophobic coating. The contact angle between the coating and water is 165 to 175 DEG, a rolling angle is 2 to 5 DEG, the light transmittance of coating glass in the 500 to 650nm is greater than 84%, and at pressure intensity of 2500 Pa, the contact angle between the coating and water is greater than 90 DEG after the coating is rubbed with 320-mesh sandpaper along a line. The preparation method of the coating is simple, environmentally friendly and low in cost, is suitable for the surface of glass, stone, ceramics, wood, metal and the like, and has a wide application prospect.

The invention discloses a method for preparing a BiVO4 film with photocatalysis performance by using a sol-gel method. The method comprises the following steps of: respectively preparing a precursor solution A and a precursor solution B by taking bismuth nitrate pentahydrate (Bi(NO3)3.5H2O) and ammonium metavanadate (NH4VO3) as raw materials and taking citric acid as a solvent, preparing BiVO4 sol by mixing the precursor solution A with the precursor solution B; and coating the BiVO4 sol to a treated FTO (Fluorine-doped Tin Oxide) glass substrate surface in a spinning manner by adopting a spin coating method so as to form a film, and carrying out pre-annealing and annealing treatment on the film formed after spin coating, thereby obtaining the BiVO4 film fixed on the FTO glass substrate surface. According to the method for preparing the BiVO4 film with the photocatalysis performance by using the sol-gel method, the pure-monoclinic-phase BiVO4 film is prepared by combing the sol-gel method with the spin coating method, the prepared BiVO4 film has certain photocatalysis activity under visible light irradiation, meanwhile, the problem of immobilization of a BiVO4 photocatalyst is solved, and then, the separation, recovery and reuse of the BiVO4 photocatalyst are realized.

The invention relates to a manganese-based low-temperature denitration catalyst taking TiO2-SiO2 as a carrier and a preparation method thereof, belonging to the field of environmental catalysis and environmental protection. According to the manganese-based low-temperature denitration catalyst, a MnOx/TiO2-SiO2 catalyst is prepared by adopting a sol-gel method, wherein the mass percentage of SiO2 in the composite carrier is 40-60%, and the mass ratio of Mn to Ti+Si is (0.5-1.0): 1. The manganese-based low-temperature denitration catalyst is characterized in that due to the addition of SiO2, the specific surface area of the carrier is greatly increased, and the dispersion and stability of active substances on the surface of the carrier are benefited; and the TiO2-SiO2 is taken as the composite carrier, so that the alkali metal poisoning resistance of the catalyst can be improved. An active ingredient is low in cost, is non-toxic and can have good denitration catalysis activity at a lower temperature, so that the catalyst is applicable to the denitration catalysis of NOx of a low-temperature environment of a cement kiln after dust removal.

The invention discloses sodium borosilicate glass doped with In2S3 quantum dots and a preparation method thereof. According to the sodium borosilicate glass doped with the In2S3 quantum dots, the In2S3 quantum dots are uniformly doped into sodium-borosilicate-based glass, and the sodium-borosilicate-based glass contains the following ingredients in percentage by mass: 5-15% of Na2O, 15-30% of B2O3 and 55-80% of SiO2; and the doped amount of the In2S3 quantum dots is 0.1-5.0% of the mass of the sodium-borosilicate-based glass. The sodium borosilicate glass doped with the In2S3 quantum dots is prepared in a manner that a sol-gel method is combined with atmosphere control, has excellent third-order nonlinear optical performance and heat stability, and has high light transmittance in visible-infrared regions, thereby being an important candidate material which is expected to produce high-speed full-light logic devices.

A preparation method of polyurethane acrylate oligomer surface modified silica belongs to the technical field of nanoparticle surface modification. The method provided by the invention comprises steps of: first synthesizing nano silica by a sol-gel method, and modifying the nano silica with an amino silane coupling agent; reacting acrylate macromonomers with diisocyanate monomers to synthesize an isocyanate group-terminated polyurethane acrylate oligomer; and then reacting the oligomer with the amino silane coupling agent modified silica particles to obtain oligomer surface modified silica. The oligomer modified silica has good dispersion and stability in organic solvents, such as toluene and ethyl acetate and can be used as an additive and a crosslinking agent in the fields of photocuring coating, adhesive, plastic, rubber and novel nano composite material, with promising application prospect.

The invention belongs to the technical field of functional material and particularly relates to a magnetic mesoporous titanium dioxide core-shell type compound microsphere as well as a preparation method and applications thereof. The core-shell type compound microsphere takes a ferroferric oxide nano particle cluster as the core and takes mesoporous titanium dioxide with high crystallinity as the shell. The preparation method comprises the following steps: firstly, preparing the ferroferric oxide nano particle cluster with stable citric acid, secondly, wrapping the surface of the cluster with an amorphous titanium dioxide shell through a sol-gel method, and finally, obtaining the magnetic mesoporous titanium dioxide core-shell type compound microsphere through hydro-thermal treatment. By being provided with the mesoporous titanium dioxide shell with high crystallinity, the compound microsphere has the characteristics of high selectivity, high enrichment capacity, high sensitivity and high recovery rate to phosphoeptide; and since a magnetic core exists, the microsphere enriched in phosphoeptide can be separated by magnetism quickly and very conveniently. The method provided by the invention has the advantages that the operation is simple, the process is controllable, and the prepared compound microsphere can be used for analyzing and identifying phosphoeptide with ultra low concentration in a biological sample.