20 results about "Sol" patented technology

The invention relates to the field of preparation of inorganic aerogel materials, and particularly discloses a preparation method of nano aluminum oxide aerogel powder with high specific surface area, high dispersion and low agglomeration. The method comprises the following steps: by taking water-phase fiber / feather-shaped alumina sol as a matrix, introducing styrene-based colloidal particles, obtaining composite powder by combining the steps of spray instantaneous freezing and vacuum freeze-drying, and performing segmented degreasing in an oxidizing atmosphere to remove the colloidal particles, thereby obtaining the composite powder. The prepared nano aluminum oxide aerogel powder is fluffy, has good pore connectivity, can be redispersed and has a high specific surface area. The method does not introduce an organic replacement solvent which is mutually soluble with water, and is simple in process flow and suitable for large-scale production.

The present invention therefore relates to a sol-gel finish layer of a non-stick coating of a household article, said layer forming a cooking surface and being free of silica and of colloidal metal oxide.

Provided are: colloidal particles of a Ti-containing oxide and a sol thereof which retain a high refractive index and have excellent light resistance; and methods for producing the particles and the sol.　The colloidal particles of a Ti-containing oxide have an equivalent-circle diameter, determined by analyzing a transmission electron photomicrographic image, of 5-50 nm. Throughout the whole colloidal oxide particles, Zn and / or Fe is distributed and Nb and / or Ta is distributed.

The invention provides a high-concentration silica sol stabilization method based on surface site shielding, and relates to the technical field of colloidal chemistry and material scientificity, and the high-concentration silica sol stabilization method comprises the three steps of initial silicon solution preparation, surface site shielding treatment and concentration and stabilization verification. According to the present invention, the efficient stabilization of the high-concentration silica sol is achieved, specifically, the active silicon hydroxyl site on the silica sol particle surface can be precisely targeted, the condensation reaction between the particles is blocked through the dual effects of the adsorption and the covalent condensation of the screening agent molecule, and the core problem of easy gelation at the high concentration is completely overcome; according to the preparation method, silica sol is dispersed stably during long-term storage, the effect obviously exceeds that of a traditional strong base inhibition method, a single silane modification method or an organic dispersing agent method, the shelf life of the product is effectively prolonged, a trace and efficient bifunctional silane combination is adopted as a screening agent, the dosage is far lower than that of a traditional modification means, and the industrial production cost is reduced.

Provided are surface-treated sol-gel silica particles or the like which have little change in charge when the environment changes, and which can impart good printing characteristics to a toner when used as an external additive for the toner. Surface-treated sol-gel silica particles having R2SiO3 / 2 units and R43SiO1 / 2 units (R2 and R4 are monovalent hydrocarbon groups) on the surface, satisfying (1) to (7) (1) a median diameter as determined by a dynamic light scattering method of 50 nm to 300 nm, (2) an average circularity of 0.80 to 1.0, (3) a refractive index of 1.380 to 1.420, (4) a true density of 1.7000 g / cm < 3 > or more and less than 1.9000 g / cm < 3 >, (5) a volume resistivity of 1011 Omega cm or more, and (6) a ratio represented by water vapor adsorption specific surface area / nitrogen adsorption specific surface area of 2.00 to 10.0. And (7) the moisture absorption rate when exposed at 30 DEG C / 90% RH for 2 hours is 6.0-11 mass% with respect to the dry mass when dried at 150 DEG C for 1 day.

The invention provides a self-cleaning hydrosol capable of preventing corrosion and ice as well as a preparation method and application of the self-cleaning hydrosol. The preparation method of the self-cleaning hydrosol capable of preventing corrosion and ice comprises the following steps: adding TiO2 nano powder into a solvent, and uniformly stirring to obtain a transparent TiO2 solution; dropwise adding orthosilicate into the obtained TiO2 solution, and uniformly stirring to obtain a white colloidal solution; dropwise adding amino silane into the obtained white colloidal solution, and uniformly stirring to obtain a milk white colloidal solution; and dropwise adding a silane coupling agent into the milk white colloidal solution, and uniformly stirring to obtain the product. According to the invention, a stable micro-nano coarse structure constructed by TiO2 / SiO2 is used as a'skeleton ', and is modified by low-surface-energy fluorosilane, so that a super-hydrophobic interface capable of stably locking air is formed on various substrates, and meanwhile, the super-hydrophobic coating has the effects of corrosion isolation prevention and freezing delay prevention, thereby achieving a multi-energy, efficient and lasting protection effect.

The utility model discloses dissoluble transfer paper which comprises a lower bottom layer, a middle layer fixedly connected to the upper surface of the lower bottom layer, a covering layer fixedly connected to the upper surface of the middle layer, the lower bottom layer comprises a base layer, an anti-diffusion layer fixedly connected to the upper surface of the base layer, an alkaline layer fixedly connected to one side of the anti-diffusion layer, and a hydrosol layer. The upper surface of the hydrosol layer is fixedly connected with a color pigment layer, one side of the color pigment layer is fixedly connected with an active agent control layer, and the covering layer comprises a film adhesive layer and a release auxiliary layer. By means of the structure, acidic substances can be neutralized through the alkaline layer, the stability of the color pigment layer can be protected conveniently, the color pigment layer serves as a color developing substance carrier, pigment can be evenly dispersed, and therefore the color saturation of a transfer printing pattern is ensured; therefore, the agglomeration of the color pigment particles is inhibited, and the pattern glossiness on the surface of the coating is improved.

The invention discloses a preparation method of bioactive glass, which comprises the following steps: dispersing starch in deionized water, and heating to form a starch colloidal solution; adding a silicon precursor, a phosphorus precursor and a calcium precursor into the prepared starch colloidal solution according to a set molar ratio, and stirring until uniform sol is formed, so as to form precursor sol; standing the sol to form gel; performing vacuum drying on the gel to obtain dry particles; and calcining the dried particles, and crushing the product to obtain the bioactive glass. The natural starch is dispersed in the deionized water, the temperature is increased, the natural starch is subjected to a gelatinization reaction, the starch colloidal solution is generated, the uniformity of particle size distribution of precursor sol particles is improved, meanwhile, the conversion speed from sol to gel is increased, the obtained gel product is more uniform in distribution and firmer in texture, and the uniformity of raw materials is improved. By utilizing the method, the bioactive glass with better specific surface area, in-vitro mineralization speed and the like can be obtained.

The present application relates to the field of paint, and more particularly to an artistic paint with low release, non-allergic, stain-resistant and clear texture and a preparation method thereof, which comprises the following raw materials in parts by weight: premixed solution A 36-54 parts, premixed solution B 18.7-24.85 parts, additives 0.15-3 parts, pigments 18-22 parts, and fillers 9-17 parts; the premixed solution A comprises emulsion A, emulsion B and silica sol; the volume ratio of emulsion A: emulsion B: silica sol is 6:2:1; the MFFT of the emulsion A is 5-10 DEG C, and the MFFT of the emulsion B is 0-5 DEG C. The paint solves the problems of the existing interior wall paint, such as insufficient environmental protection, high release amount of VOC, TVOC and SVOC, and poor low-temperature film-forming property of the product, and at the same time, the paint can easily remove common life stains such as watercolor pen, neutral pen, tea stain and ink.

The present application belongs to the technical field of ceramic ultra-fine fiber material, and relates to a flexible ceramic ultra-fine fiber material based on airflow blowing and a preparation method thereof. First, a polar solvent is mixed with a metal alkoxide and stirred to obtain a low-activity functional modified metal alkoxide through an association reaction; then, deionized water and a non-ionic surfactant are added and ultrasonically dispersed to obtain an ultra-fine colloidal particle stable sol after concentration; subsequently, a cyclone auxiliary environment atmosphere control and a heat auxiliary fiber receiving technology are combined to perform airflow blowing through a 'V-shaped' spinneret, and a multi-morphology ceramic precursor fiber material is obtained after drying; then, after being ceramized through an array type laser spot welding technology, the flexible ceramic ultra-fine fiber material is obtained through a flash crystal technology 'ultra-high speed heating-rapid cooling' treatment. The flexible ceramic ultra-fine fiber material has an average fiber diameter of 10-800 nm, a grain size of 2-30 nm, and a bending stiffness of 30-100 mN.

The application discloses a reaction equipment for preparing low-sodium aluminum sol and relates to the technical field of chemical equipment. The reaction equipment comprises a reaction kettle, and an inner cavity for aluminum sol preparation reaction is arranged in the reaction kettle. The application further discloses a reaction method of the reaction equipment for preparing low-sodium aluminum sol, which comprises the following steps: aluminum sol generation, aluminum sol transfer, product discharge and back flushing. The reaction kettle, the fixing cover and the annular cover are arranged, the aluminum and the hydrochloric acid are reacted in the reaction kettle to generate the colloidal solution of the aluminum sol, the aluminum sol colloid is in the nano-particle state after being generated, the colloidal solution of the aluminum sol colloid is directly transferred into the annular cover, the colloidal solution of the aluminum sol colloid in the nano-particle state passes through the ion exchange column in the annular cover, the sodium ions in the colloidal solution of the aluminum sol colloid are adsorbed and separated by the strong-acid cation exchange resin in the ion exchange column, and thus the low-sodium aluminum sol can be obtained.

A chain-like colloidal silica particle dispersion sol (16) is formed by dispersing a group of colloidal silica particles, observed using a field emission scanning electron microscope, consisting of 4 to 300 spherical primary particles linked in a chain and having an average length of 35 nm to 1800 nm, in a mixed solvent (11) of pure water and an organic solvent. The average particle size of the spherical primary particles is 6 nm to 20 nm, and the average aspect ratio of the spherical primary particles is in the range of 1.0 to 1.3. The organic solvent is an alcohol with 1 to 4 carbon atoms or a water-soluble diol compound with 2 to 4 carbon atoms. The content of K, Na, or NH3 impurities in each colloidal silica particle is less than 3500 ppm by mass, and the content of alkaline earth metals or aluminum impurities is less than 1 ppm by mass.

Provided is a chainlike colloidal silica dispersion sol (16) formed by dispersing a group of colloidal silica particles having an average length of 35 nm to 1800 nm and an average of 4 to 300 spherical primary particles chainly connected that are grasped by field emission scanning electron microscopic observation in a solvent mixture (11) of pure water and an organic solvent. The average particle diameter of the spherical primary particles is 6 nm to 20 nm, the average aspect ratio of the spherical primary particles is within a range of 1.0 to 1.3, and the organic solvent is an alcohol having 1 to 4 carbon atoms or a water-soluble glycol compound having 2 to 4 carbon atoms. The content proportion of each impurity of K, Na or NH3 per colloidal silica particle is 3500 ppm by mass or less, and the content proportion of each impurity of an alkali earth metal or aluminum is less than 1 ppm by mass.

The invention discloses high-dispersity ceramic ink as well as a preparation method and application thereof, and belongs to the field of ceramic ink. The high-dispersity ceramic ink comprises a ceramic pigment, wherein the ceramic pigment is ZrO2 (at) AlOOH prepared by a sol-gel method; the ZrO2-coated AlOOH takes zirconium dioxide as a core, and the outer layer of the ZrO2-coated AlOOH is coated with boehmite; the mass of the boehmite is 3-5wt% of the mass of the zirconium dioxide. Boehmite as a coating layer can form a hydration shell layer on the surface of zirconium dioxide, restrain agglomeration among particles and improve colloid stability, and boehmite contains more active hydroxyl groups, so that interaction force among ceramic pigments can be further weakened, particle aggregation can be avoided, meanwhile, covering power and whiteness of the ceramic ink can be improved, and the ceramic ink has a good application prospect. The color development performance is improved. The phosphorylated polyether modified silicone oil is adopted as a dispersing agent, the dispersity of the ink can be further improved, and the ceramic ink which is excellent in rheological property and does not settle after being stored for a long time is obtained.

The application discloses a kind of low specific surface area colloidal silica solution and its preparation method, for the problems that the particle structure of the silica sol obtained by existing alkoxysilane hydrolysis method is loose, specific surface area is high, densification process depends on high temperature and high pressure, and impurities are easily introduced, the application uses ammonia / ammonium chloride buffer solution buffer system to stabilize reaction pH, combined with seed step growth process, with alkoxysilane as silicon source, drop by batch slowly, the system pH is regulated to 8.5~10 throughout the process, and the target product is prepared after incubation and maturation.The application can accurately control particle size, narrow particle size distribution, significantly reduce the specific surface area of product, the process is mild without high temperature and high pressure equipment, the product has high purity and good batch stability, and is suitable for high-end fields such as semiconductor chemical mechanical polishing.

The invention belongs to the technical field of adsorbents, and particularly relates to an activated aluminum oxide loaded modified silver vanadate absorption composition, a preparation method and application. The preparation method of the absorption composition of the activated aluminum oxide loaded modified silver vanadate comprises the following steps: S1, preparing V2O5 sol-gel; s2, the surface of the V2O5 sol-gel is evenly coated with powder Ag2O, and silver vanadate colloid is obtained; s3, performing surface activity treatment to obtain silver vanadate colloid 2; s4, performing ultrasonic radiation treatment to obtain silver vanadate colloid 3; and S5, mixing activated aluminum oxide and the silver vanadate colloid 3, calcining at high temperature, cooling to room temperature, and crushing until the particle size is 40-50 meshes, thereby obtaining the product. The prepared composition has the advantages of large specific surface area, high adsorption capacity, high temperature resistance, good thermal stability, failure discoloration judgment and the like, and has good application effect and development prospect in removal of halogen and sulfur elements in coal hydrocarbon element analysis.

The invention discloses a dual-mode ascorbic acid (AA) detection method based on RGB colorimetry and gray analysis. The method comprises the following steps: firstly preparing nano-silver sol, then uniformly mixing a certain volume of nano-silver sol, ultrapure water and a glycine-NaOH buffer solution with 0.2 mL of 0.01 mol / L AgNO3 solution, and adding an ascorbic acid standard solution or a solution to be detected; a self-made device combined with a smart phone is used for collecting a reaction system image, and a Tyndall effect average gray value (AG) and a color intensity value (RGB channel value) are extracted as double response signals for quantitative analysis of AA. According to the invention, an intelligent mobile phone RGB colorimetric method and a Tyndall effect gray scale analysis method are combined, rapid and sensitive detection of AA is realized, and the method has the advantages of high reliability, good selectivity, strong portability and the like, is suitable for POCT (point-of-care testing) on-site rapid detection, and is convenient to popularize and use.

The invention relates to a device and method for preparing an ITO film from aerosol, and belongs to the field of optical film preparation, the device comprises a vacuum heating furnace, and a sol bottle and a photovoltaic glass plate to be coated which are arranged in the vacuum heating furnace; and the vacuum heating furnace is used for vacuumizing the ITO sol in the sol bottle, and meanwhile, colloidal particles obtained after the sol is gasified are settled on a photovoltaic glass plate to be coated under the action of gravity and then are heated. The method comprises the steps that aged ITO sol is poured into a sol bottle, heating is conducted after vacuum pumping, the ITO sol in the sol bottle is gasified into ITO aerosol, and colloidal particles obtained after the sol is gasified are smaller than 50 nm; colloidal particles obtained after the sol is gasified freely settle under the action of gravity until the ITO film layer settled on the photovoltaic glass reaches 200 nanometers or above; and starting a vacuum heating furnace for heating, and then cooling along with the furnace to prepare the photovoltaic glass with the ITO film. The method can be used for preparing the ITO film which is nanoscale, uniform in thickness, high in film density, low in porosity and high in oxygen vacancy.

The invention discloses a preparation method and application of cationic silica sol, the cationic silica sol is obtained through reaction of acidic silica sol and organic aluminum salt hydrolysate, in the process, due to the fact that colloidal particle charges are reversely changed from negative to positive, Zeta potential is greatly increased compared with that of original acidic silica sol, and mutual repulsive force between colloidal particles is enhanced; according to the preparation method, the stability of silica sol with different particle sizes can be improved, the storage time of acidic silica sol is greatly prolonged, the organic compatibility of a system is also improved, meanwhile, good application in the fields of textiles, films, coatings, paper, printing ink and the like is met, and the problem that traditional anionic silica sol is poor in compounding property in the industries is solved.

This application relates to the field of multicolor paint technology, specifically to a self-cleaning multicolor paint. The self-cleaning multicolor paint of this application comprises the following components: deionized water, modified resin, modified nanomaterials, protective colloidal salts, pigments, kaolin, mica powder, titanium dioxide, glass fiber powder, hydroxyethyl cellulose, defoamer, multifunctional additives, dispersing and wetting agents, antifreeze, film-forming aids, and thickeners. The modified nanomaterials and modified resin impart excellent hydrophobic and adhesion properties to the multicolor paint. The preparation method of this self-cleaning multicolor paint includes the following steps: first, a protective sol, a dispersed phase base paint, and a continuous phase clear varnish are prepared separately; then, the protective sol and dispersed phase base paint are mixed and granulated; finally, the sol and continuous phase clear varnish are mixed evenly. The self-cleaning multicolor paint prepared by the above method has rich colors, good simulation effect, and excellent self-cleaning and adhesion properties.