34 results about "Polysol solution" patented technology

An aerosol solution formulation comprising:(a) a salt of formula 1wherein X− is an anion(b) an HFC propellant;(c) a cosolvent; and(d) an inorganic or an organic acid, wherein the concentration of the acid is in a range that corresponds with a pH range of 2.5 to 5.5 in aqueous solution.

One aspect of the invention relates to a method of preparing silicone fine particles which comprises preparing a mixture comprising an organotrialkoxysilane and an organochlorosilane to give a concentration of the organochlorosilane in the mixture of about 100 to about 2,000 ppm; mixing the mixture with water to prepare a sol solution; and maintaining a pH value of the sol solution within a range of about 8 to about 11. Another aspect of the invention relates to a thermoplastic resin composition which employs the silicone fine particles as a diffuser.

The present invention discloses a silicon sol adhesive modified by using high polymer and its preparation method. Its composition comprises alkaline silicon sol containing 20-30%, SiO2 and PVA whose content is less than [(32-100XSiO2%) / 320]X100%. Its preparation method includes: a. preparing PVA aqueous solution; b. preparing alkaline silicon sol solution; and c. mixing said two solution uniformly, in which after the alkaline silicon sol solution is prepared or after the two solutions are mixed uniformly its pH value must be regulated. Said silicon sol adhesive can accelerate drying speed when it is used in investment casting industry, and can raise the normal temp. strength of pattern shell in the investment casting, and can reduce retained strength.

Disclosed is an allicin microcapsule and its preparation method, wherein garlicin and starch are used as the core, hydrosol is used as the inner layer membrane, the grease collosol is an outer layer membrane structure, the garlicin, starch, hydrosol and grease collosol accmounts to 0.1-50%, 10-90% and 0.5-10% of the total product weight. The preparing process consists of attaching the garlicin onto the starch carrier, coating a layer of hydrosol solution onto the granule surface, forming an inner layer hydrosol covering film through drying and dehydration, than coating a layer of grease collosol solution, drying and removing organic solvent to form the outer layer collosol covering film.

The invention discloses a preparation method of a water-based nano ceramic composite coating. The water-based nano ceramic composite coating is prepared from the following components in parts by mass: 5 to 15 percent of water-based acrylic polymer, 5 to 20 percent of silica sol solution, 23 to 40 percent of siloxane, 2 to 15 percent of alcohols, 10 to 15 percent of deionized water and a trace amount of metal oxide. The preparation method of the casing comprises the following steps: stirring at normal temperature and normal pressure for 20 to 60 minutes by a reactor, and generating reaction to form composite resin; then adding 10 to 40 percent of pigment and 0.1 to 5 percent of weak acid; stirring at the normal temperature and the normal pressure for 5 to 60 minutes and curing, thereby finishing the preparation of the coating.

The invention discloses a preparation method of high-purity large-particle-size silica sol, which belongs to the technical field of silica sol preparation. The specific preparation method comprises the following steps of mixing an acidic silica sol solution with a pH value of 2-3 with polyethylene glycol 2000-10000, adjusting the pH value to 8-9.5, and heating and boiling to obtain sol crystal grains, adding acid activated resin, washing the resin until the pH value is 3.0-4.5, adding an aluminum salt modifier and water glass, and carrying out ion exchange reaction on the water glass to obtainaluminum modified silicic acid, and adding aluminum modified silicic acid into the sol crystal grains, adding an alkaline solution to adjust the pH value to 9.5-10.5, synthesizing while performing ultrafiltration, and heating to synthesize the high-purity large-particle-size silica sol. The acidic silica sol is subjected to hydroxylation reaction, so that the gel is aggregated to form a large-particle silica sol matrix, the water glass is used as a raw material, the aluminum-modified active silicic acid is prepared by adopting an ion exchange method, ultrafiltration and synthesis are carriedout simultaneously, the particle size is increased quickly, the energy consumption is low, the synthesis period is short, the production efficiency is improved, and the polishing requirements of noveldevices in electronic industry can be met.

The invention discloses a method for preparing a solid-phase microextraction coating, which comprises the following steps: adding straw and biological enzymes to an aqueous ionic liquid solution, adding a mixed solution of acidic ionic liquid and DMSO after the reaction is completed, and heating to obtain a straw solution; Add graphite powder to the ionic liquid, ultrasonic pretreatment, add sulfuric acid and potassium permanganate, ultrasonic treatment again, introduce oxygen, centrifuge, wash and precipitate and dry to obtain graphene oxide, add it to the acidic ionic liquid, and then add 1‑methylimidazole, N‑picoline or pyrrolidone, heated to obtain graphene oxide derivatives; mixing and heating straw solution and graphene oxide derivatives to obtain sol solution; extracting fibers to form a rough surface, organic solvent After washing, ultrasonication and drying, it is immersed in a sol solution, then immersed in a polar solvent, and dried. The invention has the advantages of good biocompatibility, strong enrichment ability, stable extraction coating, long service life and the like.

The invention discloses a preparation method of a calcium-doped titanium dioxide nano fiber photocatalyst. The method comprises the following steps: (1) preparation of solution A: adding certain amounts of acetic acid and polyethylene pyrrolidone into an ethanol solution, and stirring to form a transparent solution A; (2) adding certain amounts of isopropyl titanate and calcium acetate into the solution A prepared in the step (1), and stirring uniformly to obtain a transparent sol solution B; (3) carrying out electrostatic spinning on the sol solution B; and (4) drying the sample prepared in the step (3) at room temperature for 24-96 hours, and calcining in a high-temperature furnace at 450-700 DEG C to obtain the Ca<2+>-doped TiO2 nano fibers. The Ca<2+>-doped TiO2 nano fibers prepared by the method have excellent photocatalytic degradability for organic dyes.

The invention relates to a long-acting anti-fog silicon-based gel anti-fog agent for lenses and its preparation method and application. The anti-fog agent is composed of a silicon-based sol solution and a long-chain polysaccharide / amino molecule cross-linking solution, wherein: the silicon-based sol The solution includes: tetraethyl orthosilicate, cyclopentasiloxane, polydimethylsiloxane crosslinked polymer, organic solvent; the long-chain polysaccharide / amino molecule crosslinking solution includes: deionized water, Polysaccharide molecule, polyvinyl alcohol, amino molecule surfactant, photocatalytic attachment agent cerium oxide. The silica sol in this anti-fog sol is cross-linked with hydrophilic polysaccharide molecules and amino molecules to form a core-shell structure with a rigid center and a soft long chain, which promotes water droplets to spread evenly and rapidly throughout the surface through capillary action, achieving moisture absorption and anti-fog effects , long-chain polysaccharide / amino molecules are used as end-capping agents to inhibit the volatilization of surfactants, and cerium oxide is introduced to increase the surface adsorption of silica sol, so as to overcome the problem of poor light transmission caused by poor adhesion of the original water-based anti-fog coating.

The invention is a method for preparing nanofiber, and in particular comprises: by using butyl titanate, KNO3, citric acid, ethanol and nitric acid as raw materials, wherein by molar ratio, butyl titanate: KNO3: Citric acid: ethanol: dilute nitric acid = 1:2:2: (38 ~ 50): (19 ~ 25), polyvinyl alcohol or polyvinyl pyrrolidone as a polymer template, and aqueous solution of polyvinyl alcohol as a solvent, preparing a sol solution at room temperature; then preparing composite fiber by using an electrostatic spinning method, wherein an electrostatic spinning voltage is controlled to be 10 ~ 30KV, and curing distance of the nozzle to the accept screen is 8 ~ 20cm; and then performing heat treatment to the composite fiber at 500 ~ 950 DEG C for 3 ~ 8h to obtain layered K2Ti4O9 continuous nanofiber. The method of the invention is simple in process, easy in operation, high in efficiency, low in energy consumption, and simple in production equipment; and the prepared fiber has high purity, good crystallinity, a large surface area, a large length-diameter ratio and good dispersion.

The invention discloses a preparation method of an oil-resistant self-cleaning coating, and relates to the technical field of new materials. The method comprises the following steps: performing ultrasonic treatment on an electrostatic spinning solution, performing secondary ultrasonic treatment on fibers sprayed from a syringe needle before reaching a negative electrode during electrostatic spinning, and enabling the negative electrode to be an aluminum alloy plate during electrostatic spinning, so that the fibers are directly generated on the aluminum alloy plate to form a crossed three-dimensional net-shaped coating; water on the surface of the coating falls off to take away part of oil stains, and the rest oil stains fall off automatically, so that the self-cleaning effect is achieved; and the aluminum alloy with the fiber prepared on the surface is soaked twice, the aluminum alloy is soaked in a foamed polyvinyl alcohol solution for the first time, the aluminum alloy is soaked in a polyvinyl alcohol silica sol solution for the second time and heated, the coating is firmly bonded to the surface of the aluminum alloy, and meanwhile the service life is prolonged.

The invention provides a preparation method of divalent metal iron-based spinel. The preparation method comprises the steps as follows: S1, mixing a ferric nitrate solution and a divalent metal nitrate solution in the solute mole ratio being 1:2 to obtain a solution A; S2, dropwise adding an ammonium carbonate or ammonium bicarbonate solution to the solution A to obtain a hydrosol solution; S3, drying the hydrosol solution obtained in the S2 at 65-105 DEG C, and performing forming at 350-550 DEG C to obtain a spinel precursor; S4, calcining the spinel precursor at 700-1,100 DEG C to obtain divalent metal iron-based spinel, wherein no continuous foam exists in the solution when ammonium carbonate or ammonium bicarbonate is dropwise added. The method has a simple and quick process, the requirement for equipment and the preparation cost are reduced, the conditions are easy to control in the preparation process, and mass production can be realized. Meanwhile, divalent metal iron-based spinel with good crystal structure, particle size uniformity, high-temperature stability, mechanical stability and good magnetism can be obtained.

Provided are low-density colored silica particles having a porous structure, and a preparation method thereof. The preparation method comprises: dropwise adding a sodium silicate solution to a sulfuric acid solution to obtain an acidic silica sol solution; injecting the sulfuric acid solution and hydroxyethyl cellulose into a reaction tank, then adding the acidic silica sol solution and sodium silicate solution simultaneously; after the acidic silica sol solution is added dropwise, continuing to add the sodium silicate solution dropwise until the pH value is 3–4; adding pigment and then adding sodium silicate solution dropwise until a final pH value is reached, then stirring until the system precipitates a gel; adding ethanol and glycerol to the gel and stirring; pressure-filtering, drying, crushing, washing, and drying the gel to obtain colored silica particles. The silica particles have good suspension performance and adsorption performance, and mild friction performance, and are suitable for application in everyday products such as shower gel, facial cleanser, and toothpaste, and thus have good prospects for application.