55 results about "Sol" patented technology

The invention discloses stable silicon dioxide microspheres as well as a preparation method and application thereof. Mixing a sodium silicate diluent and an organic acid aqueous solution to form colloidal particles, and carrying out a sol-gel reaction to obtain silica sol; the preparation method comprises the following steps: in an air environment, throwing silica sol into water under stirring to form microspheres, injecting inorganic acid into the water at the same time, then injecting a sodium silicate diluent for reaction, and then adjusting the pH value of the system to 6-7; and aging, washing, drying and roasting to obtain the silicon dioxide microspheres. The preparation method comprises the following steps: mixing a sodium silicate diluent and an organic acid aqueous solution by an acid mixing method, granulating by air to form microspheres, and finally injecting inorganic acid to quickly remove heat, reduce pressure drop and maintain the state of the microspheres, thereby obtaining the stable silicon dioxide microspheres. The porous silicon dioxide microsphere with larger surface area and pore volume is obtained, has better catalytic performance when being used as a catalytic oxidation carrier, and has the advantages of high conversion rate and high stability.

The invention discloses a water-based environment-friendly high-temperature-resistant inorganic ceramic anticorrosive coating and a preparation method thereof, and belongs to the field of coating preparation. According to the scheme, the water-based environment-friendly high-temperature-resistant inorganic ceramic anticorrosive coating is prepared from the following components in parts by weight: 40 to 60 parts of silica sol, 30 to 36 parts of methyltriethoxysilane, 5 to 10 parts of montmorillonite, 3 to 8 parts of colloidal cellulose, 5 to 8 parts of copper complex black, 0.5 to 2.0 parts of other fillers and 5 to 20 parts of deionized water. The preparation method adopts a classic sol-gel method, the production process is simple and efficient, and the cost is low. The water-based environment-friendly high-temperature-resistant inorganic ceramic anticorrosive paint prepared by the formula can resist the high temperature of 800 DEG C, and the corrosion area is less than 1% according to a 720-hour neutral salt spray test result. The formula is free of organic solvents and artificially synthesized polymer materials, the water-based ceramic coating is prepared from natural montmorillonite and cellulose structures, VOC pollution is avoided, the production cost is low, and the water-based ceramic coating is a very environment-friendly inorganic ceramic coating.

The present invention relates to a sol-gel finishing layer for a non-stick coating of a household item, said layer being free of silica. No figure

The invention belongs to the technical field of light-to-light emission of fluorescent substances. The invention discloses a method for accurately measuring the pH value of a small amount (less than one drop) of liquid by fixing fluorescent substance molecules on the surface of a common glass slide by using silica sol and utilizing the physical phenomenon that the fluorescent substance molecules excite the light spectrum to change along with the pH value of the environment.

The present application discloses a silica sol production quality assessment system and method based on image analysis, which belongs to the field of silica sol production quality assessment. The present application obtains silica sol image data, pre-processes the obtained image, constructs a silica sol structure evolution model, imports silica sol particle parameters into the silica sol structure evolution model to calculate silica sol particle structure characteristic parameters, evaluates the aging evolution degree of the silica sol, constructs a light stratification attenuation model, imports the incident light intensity into the light stratification attenuation model to calculate the total light dose of each layer, constructs an aging evolution model, and imports the total light dose into the aging evolution model to evaluate the future aging of the silica sol. The present application extracts characterization parameters such as particle size, roundness, and aggregation through image analysis, and combines the modeling of the light dose received by each layer of the silica sol to improve the visual monitoring accuracy of the silica sol aging process and the aging trend prediction ability.

The invention discloses 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 the reaction kettle is internally provided with an inner cavity for aluminum sol preparation reaction. The invention further discloses a reaction method of the reaction equipment for preparing the low-sodium aluminum sol. The reaction method comprises the following steps of aluminum sol generation, aluminum sol transfer, product discharge and back flushing. The reaction kettle, the fixed cover and the annular cover are arranged, metal aluminum and hydrochloric acid react in the reaction kettle to generate a colloidal solution of aluminum sol, the colloidal solution of the aluminum sol is in a nano-particle state after generation, and the colloidal solution of the aluminum sol is directly transferred into the annular cover at the moment; the aluminum sol colloidal solution in the nano-particle state passes through the ion exchange column in the annular cover, sodium ions in the aluminum sol colloidal solution are adsorbed and separated by the strong-acid cation exchange resin in the ion exchange column, and therefore the low-sodium aluminum sol can be obtained.

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.

To provide an inkjet ink which can enhance the solubility of a gelling agent into ink and sufficiently increase the gelling property of ink, and to provide an image forming method using the same.SOLUTION: There is provided an inkjet ink containing a polymerizable compound which polymerizes by an active ray and a gelling agent, and undergoing sol-gel phase transition by a gelling agent, wherein the polymerizable compound includes a first polymerizable compound containing a benzene ring and an ethylene oxide group or a propylene oxide group in the molecule in which the total number of the ethylene oxide group and the propylene oxide group is two or more, the content of the first polymerizable compound is 5 mass% or more based on the total mass of the ink, the gelling agent is a compound which reversibly causes the inkjet ink to undergo a sol-gel phase transition by a temperature change and contains a hydrocarbon group having 22 or less carbon atoms.SELECTED DRAWING: Figure 1

Stable dispersions of encapsulated pigments suitable for use in food, cosmetic, pharmaceutical, or personal care products are described herein. Pigments encapsulated in a water-insoluble protein matrix, in particulate form, are homogeneously dispersed in a sol colloid formed by high-shear mixing between a solid fat and a liquid oil. Within the liquid oil, the solid fat's creaming tendency is believed to counteract the sedimentation tendency of the encapsulated pigment, resulting in a dispersions with improved stability.

Provided are: oxide colloidal particles which contain rutile-type titanium oxide as a main component and in which the formation of anatase-type titanium oxide is effectively suppressed; a sol containing the oxide colloidal particles; and a method for producing the oxide colloidal particles. The problem is solved by oxide colloid particles (A) comprising Ti and Sn and having an average primary particle diameter of 5-300 nm and / or a primary particle diameter of 5-300 nm in terms of both D10 and D90 in the number-based cumulative particle size distribution, wherein the numerical value of (rutile-type tin dioxide content) / (rutile-type titanium oxide content) (mass ratio) calculated by the method below is 0.3-3.5% when expressed as a percentage: (rutile-type tin dioxide content) / (rutile-type titanium oxide content) (mass ratio) = ((intensity of rutile-type tin dioxide diffraction lines in a diffraction pattern obtained by powder X-ray diffraction in a 2θ range of 20.0°-80.0°) / 9.63) / ((intensity of rutile-type titanium oxide diffraction lines in the diffraction pattern obtained by powder X-ray diffraction in the 2θ range of 20.0°-80.0°) / 3.27).

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.

Stable dispersions of encapsulated pigments suitable for use in food, cosmetic, pharmaceutical, or personal care products are described herein. Pigments encapsulated in a water-insoluble protein matrix, in particulate form, are homogeneously dispersed in a sol colloid formed by high-shear mixing between a solid fat and a liquid oil. Within the liquid oil, the solid fat's creaming tendency is believed to counteract the sedimentation tendency of the encapsulated pigment, resulting in a dispersions with improved stability.

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 utility model discloses a sol falling device which is simple in structure and easy to implement, a hollow pipe frame is arranged on a device body, hot melting can be conveniently carried out on colloid placed on the hollow pipe frame by introducing hot liquid, a material receiving disc and a heating module are arranged, temporary storage and heat preservation / heating can be conveniently carried out on the colloid which falls to the material receiving disc in a hot melting mode, and the device is convenient to use. The hot melting effect of the colloid is further improved, and the practicability is good; the material receiving disc is arranged in an inclined mode and plays a role in flow guiding, the glue falling baffle and the glue falling notches / glue falling holes are arranged so that hot-melt glue can be controlled to be finally dispersed and output outwards from the glue falling notches / glue falling holes of the glue falling baffle, practicability is good, and during specific implementation, the glue can be easily output from the glue falling notches / glue falling holes only when the hot-melt effect of the glue is good.

The present invention discloses a kind of dense special-shaped ultra-high purity colloidal silica and its preparation method and application. The preparation method comprises the following steps: using traditional Stobre method to obtain initial spherical silica sol, by adjusting different aging time and aging temperature to further assemble it, finally by concentration and solvent replacement, filtering and other subsequent steps to obtain solid content greater than 20wt%, primary particle size between 20nm-150nm, association degree above 1.7, surface silanol accounts for less than 15% of the total silanol, total metal ion content is less than 1ppm of dense special-shaped ultra-high purity silica sol, non-spherical special-shaped particle number accounts for more than 50%. The present invention can realize certain regulation of the final morphology of silica sol, and the internal structure of the obtained silica particles is more dense, and its hardness and rigidity are stronger, which can increase its mechanical action during grinding.

The sol-gel preparation method comprises the following steps: (1) adding a cobalt source and a phosphorus source into water, mixing, and ultrasonically dispersing uniformly to obtain a mixed solution; (2) adding an auxiliary agent and a complexing agent into the mixed solution obtained in the step (1), adjusting the pH value to be acidic, heating for reaction, and drying to obtain dry gel; and (3) placing the xerogel obtained in the step (2) in an inert atmosphere, calcining, cooling and grinding to obtain the cobalt violet pigment. The cobalt violet pigment obtained through the method is narrow in particle size distribution, excellent in dispersing performance, small in average particle size, high in lattice stability, low in dissolution amount, good in light reflection consistency, capable of avoiding color cast, excellent in color saturation, bright and lasting in color, good in stability, simple in process, low in energy consumption and environmentally friendly.

The invention relates to a solid porous material characterised in that it comprises: - a first population of particles consisting of nanoparticles smaller than 300 nm in size; - at least one other population of particles comprising one or more components distributed according to one or more particle sizes, the other population of particles representing from 20% to 80% of the total volume of the material, wherein the first population of particles represents from 25% to 85% of the volume of the material present between the particles of the other population of particles. The invention also relates to a method for producing a porous material, characterised in that it consists in adding porous particles to a colloidal sol comprising colloidal particles, said porous particles being wettable by the liquid portion of the sol and having pores and a pore network that are sufficiently fine to prevent them from being penetrated by the sol particles, which are expelled therefrom and concentrate in the liquid medium outside the particles, such that the concentration of colloidal particles in the suspension external to the particles is sufficient to allow drying to be carried out through to the drying phase in which the shrinkage stabilises.

The invention discloses a preparation method of a high-performance titanium dioxide film, which comprises the following steps: firstly, preparing titanium dioxide colloid by using a sol-gel method, and adding an anionic surfactant sodium 1-octanesulfonate in the process of preparing TiO2 sol to increase the repulsive force among colloid particles so as to prevent the colloid particles from gathering and settling and improve the stability of the colloid; and then selecting a silicon wafer with a P-type (100) crystal face as a bottom selection, spin-coating, and carrying out heat treatment to obtain the titanium dioxide film. The silicon wafer has high carrier (electron and hole) mobility, so that the conductivity of the material is improved; the structure has high flatness and lattice parameter consistency, and the repeatability in the preparation process is improved. The preparation method is convenient to operate, simple in equipment and low in cost, and the prepared titanium dioxide film is high in stability, tight in combination with the substrate, high in piezoelectric constant and outstanding in catalytic performance and has wide application prospects in the fields of sensors, environmental pollution control and artificial intelligence.

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.

A method for impregnating an oxide fibre roving with a matrix of alumina and silica includes a introducing an oxide fibre roving into an impregnation bath, wherein the impregnation bath is prepared by sol-gel process and includes a silica precursor in the form of a hybrid polymeric sol, an alumina precursor in the form of a colloidal sol and ceramic particles.

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 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.

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 preparation method of high-purity controllable particle size nano silicon sol, which comprises the following steps: obtaining a polysilicic acid solution by loading a direct current voltage on an ion exchange column through a sodium silicate aqueous solution; preparing a nano silicon sol colloidal particle seed by using part of the polysilicic acid solution; growing the nano silicon sol colloidal particle seed by controlling the injection speed of a new polysilicic acid solution to obtain a nano silicon sol colloidal particle hydrate with a required particle size; and obtaining a nano silicon sol product with a sodium ion content of less than 500 ppm or a total metal ion content of less than 10 ppm and with a sol colloidal particle size meeting the requirement after concentration, aging and adding an additive. The preparation method can more quickly and completely complete the ion exchange process, improve the production efficiency, meet the adsorption requirement of the crystal nucleus on the polysilicic acid during the growth of the colloidal particle, and thus realizes the regulation on the sol diameter by controlling the flow of the polysilicic acid solution.

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.

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