21 results about "Silica matrix" patented technology

The invention relates to the technical field of immunochromatography, in particular to a silicon-coated color fluorescent microsphere and a mild preparation method and application thereof.The preparation method comprises the steps that firstly, time-resolved fluorescent dye is synthesized in an ethanol system, then oil-soluble dye, an ethanol water solution and a swelling agent dichloromethane are added, stirring is conducted at the room temperature to enable the dye to be dissolved, and then the silicon-coated color fluorescent microsphere is obtained; and adding ammonia water and a silane coupling agent tetraethyl orthosilicate, reacting overnight, supplementing the ammonia water, gradually adding a coupling agent 3-aminopropyltriethoxysilane, and washing with pure water for several times after the reaction is finished. The particle size range of the prepared color time-resolved fluorescent microspheres is 200-450 nm, the color time-resolved fluorescent microspheres are prepared in a green and mild mode through a one-step method, a surface active agent, a dispersing agent and a surface amino modified silicon dioxide matrix are not used, the high-luminous-intensity binuclear rare earth europium complex and the oil-soluble dye are embedded into the microspheres in the polymerization process, the dye is not prone to leakage, and the color time-resolved fluorescent microspheres are environmentally friendly and environmentally friendly. The method can be used for qualitative and quantitative dual immunodetection in the field of immunochromatography.

a kind of sp 2 C covalent organic framework functionalized silicon-based chromatographic stationary phases, their preparation methods, and applications. Preparation steps: (1) Preparation of SiO2-NH2: Aminated activated spherical silica particles are prepared using an amino-containing silane coupling agent; (2) SiO2@sp 2 C-COF preparation: Using TMT and TFPT as raw materials, sp was obtained through a Schiff base-mediated aldehyde-alcohol condensation reaction initiated by a self-assembled monolayer auxiliary surface. 2 A C covalent organic framework is loaded onto the surface of a silica matrix via C=N bonds. 2 C-COF possesses an in-plane π-conjugated, highly ordered, and robust framework structure. Its unique hydrophilic covalent triazine groups and hydrophobic benzene rings can provide various interactions such as hydrophobicity, π-π stacking, hydrogen bonding, and hydrophilicity. This enables the stationary relative shape-restricted and geometric isomers to exhibit special selectivity and separation capabilities, overcoming the instability of common imine-bonded COFs in liquid chromatography (HPLC) and the limited selectivity of relatively shape-restricted and geometric isomers stationed in traditional bonded silica gel.

The invention discloses environment-friendly multifunctional gradient response allochroic silicagel and a preparation method thereof, and belongs to the technical field of allochroic silicagel. The allochroic silica gel comprises a silica gel substrate with a mesoporous-microporous two-stage pore channel structure, an organic-inorganic hybrid fluorescent allochroic indication system loaded on the inner wall of a pore channel of the substrate, and a super-hydrophobic protection layer covering the surface of a particle. According to the invention, a two-stage pore channel structure is constructed by adopting a double-template-agent synergistic self-assembly method, water molecule transmission is accelerated by utilizing a mesoporous channel, and high adsorption capacity and quick response are realized by virtue of a synergistic effect of adsorption sites provided by a microporous structure. The organic indicator is covalently anchored to a silica gel skeleton by adopting the silane coupling agent, so that dual humidity indication of visible light high-contrast discoloration and fluorescence multi-stage gradient response is realized. A super-hydrophobic protection layer is constructed on the particle surface through a fluidized bed vapor deposition method, and the intelligent protection effect of air permeability and water impermeability is achieved. The product does not contain harmful substances such as cobalt, and is environment-friendly, safe and excellent in cycling stability.

The application discloses a kind of nano fluorescent probes SiO2@Tb in detecting Fe 3+ In aspect application.Nano fluorescent probes SiO2@Tb Fluorescence emission of silica matrix as reference, characteristic emission fluorescence of rare earth terbium ion is quenched by Fe 3+ Ratiometric fluorescent probe is constructed, with self-reference characteristics, which can effectively reduce system error, with high selectivity and sensitivity, strong anti-interference ability, low detection environment requirement, high accuracy, and low detection limit, only 0.0752 μM;Simple instrument and equipment, easy to operate, with potential application prospect.

The present application relates to the field of medical device technology, and in particular to an antibacterial and breathable fiber silica gel material, a preparation method and application thereof; the fiber silica gel material comprises a porous silica gel matrix and a composite fiber layer covering at least a portion of the surface of the porous silica gel matrix, and the thickness ratio of the composite fiber layer to the porous silica gel matrix layer is 1 to 1.5; wherein, the raw materials of the composite fiber layer comprise: carbon fiber, sodium hydroxymethyl cellulose and trehalose; the composite fiber layer can provide sufficient carbon fiber, sufficient sodium hydroxymethyl cellulose and sufficient trehalose to effectively improve the flexibility and adsorption of the porous silica gel matrix, and increase the porosity and hydrophobicity of the porous silica gel matrix, so that the air permeability of the fiber silica gel material reaches more than 80%, and in addition, the fiber silica gel material can also improve the bactericidal performance of the overall fiber silica gel material, so that the antibacterial rate of the fiber silica gel material reaches 90%.

The invention provides a long-afterglow silicon dioxide nanosphere as well as a preparation method and application thereof, and belongs to the technical field of inorganic nano materials. In order to solve the problems that an existing room temperature phosphorescence (RTP) material depends on metal or organic fluorophores, the light stability is poor, the biotoxicity is high and the like, the long afterglow silicon dioxide nanospheres free of the metal and the organic fluorophores are prepared through a silicon source copolycondensation and calcination defect engineering strategy. According to the material, a silicon source precursor and a silane coupling agent are used as raw materials, polysaccharide-assisted copolycondensation is performed to form a triple bond Si-O-network, and then high-temperature calcination is performed to generate optical activity defects related to carbon impurities in a silicon dioxide matrix, so that long-life room-temperature phosphorescence (the afterglow life reaches 1.852 s) is realized. The material has the characteristics of excellent light stability, low biotoxicity and no autofluorescence interference, is suitable for anti-counterfeiting device imaging, and breaks through the defects of low luminous efficiency and poor stability of the traditional RTP material.

The present invention relates to silica-based nanoparticles for sustained release of a hydrophilic drug and a manufacturing method thereof, the nanoparticles comprising: silica-based hollow nanoparticles comprising a hollow core layer and a silica matrix shell layer infiltrated with metal; and a hydrophilic drug supported by the hollow nanoparticles.

The application discloses a preparation method of carbon dot@silica long-life phosphorescent nanocomposites with adjustable particle size, and relates to the technical field of new materials, aiming at solving the problem that there is no method which is simple in steps, green and cheap in raw materials and easy to control in small size range, and simultaneously providing new multi-heteroatom doping expansion; the application comprises the following steps: adopting epichlorohydrin as a chlorine source and an oxygen source, adopting ethylenediamine as a nitrogen source, and preparing N / O / Cl heteroatom carbon dot materials through one-step hydrothermal method; then, tetraethyl orthosilicate is used to provide a silica matrix, and the prepared carbon dot materials are coated; in the coating process, the pH condition is adjusted to realize the control of the particle size of the product within 0-20nm, and the particle size is negatively correlated with the pH value; the preparation method is simple, the raw materials are novel, cheap and green, the product has good water dispersibility, the product has excellent and stable photochemical characteristics, and has wide application prospect.

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.

An anode material for a secondary cell, characterized in that the anode material comprises a silicon dioxide matrix having carbon-encapsulated metal-doped silicon nanoparticles; a method to produce said anode material; an anode comprising said anode material; a secondary cell comprising said anode; and a vehicle comprising said secondary cell.

The invention relates to the field of glass, and particularly discloses a substrate and TGV through hole glass suitable for the field of semiconductor packaging and a preparation method of the TGV through hole glass. The glass is prepared from the following components: 52 to 73 percent of S < iO >, Al < 2 > O < 3 >, B < 2 > O < 3 >, MgO, Sr < O >, CaO, BaO, ZrO2 and Fe < 2 > O < 3 >. According to the glass, a glass matrix obtained through a float glass forming process is subjected to annealing and chemical strengthening, high-alumina-silica matrix glass is obtained, and then surface plasma treatment and modified silicon carbide fiber treatment are performed, so that the adhesive high-alumina-silica glass is obtained. The glass has excellent dielectric constant and expansion coefficient, keeps extremely strong light transmission on the premise of strong interface adhesion, can be used as a substrate for packaging a large-size wafer / panel, can be further plated with copper in a glass through hole technology, can improve the stability of a metal copper plating layer, and has a wide application prospect.

The present invention relates to the field of immunochromatography technology, in particular to a kind of silicon-coated colored fluorescent microspheres and their mild preparation method and application, the preparation method is as follows: first, a time-resolved fluorescent dye is synthesized in an ethanol system, then an oil-soluble dye, an ethanol aqueous solution and a swelling agent, dichloromethane, are added, the dye is dissolved by stirring at room temperature, ammonia water and a silane coupling agent, tetraethyl orthosilicate are added, the reaction is allowed to proceed overnight, ammonia water is added, and a coupling agent, 3-aminopropyltriethoxysilane, is added successively, and the reaction is washed with pure water several times. The colored time-resolved fluorescent microspheres prepared by the present invention have a particle size range of 200-450nm, are prepared in a green and mild one-step method, do not use surfactants and dispersants, and have a surface amino-modified silica matrix. During the polymerization process, a high-luminescence intensity binuclear rare earth europium complex and an oil-soluble dye are embedded in the microspheres, and the dye is not easy to leak. The microspheres can be used for qualitative and quantitative dual immunoassays in the field of immunochromatography.

The invention discloses a foamed silica gel production inspection method and system based on silicon matrix characteristic analysis, and belongs to the technical field of high polymer material performance evaluation.The foamed silica gel product is subjected to three-dimensional structure scanning, internal foam structure data are obtained, and a foam three-dimensional structure model is established; extracting foam structure parameters based on the foam three-dimensional structure model, establishing a three-dimensional finite element model of the foamed silica gel material based on the foam structure parameters, and establishing a three-dimensional finite element model of the foamed silica gel material based on the foam structure parameters, applying a compression working condition and a stretching working condition corresponding to the actual use condition in the finite element model, performing finite element analysis on the foamed silica gel product to obtain an internal stress distribution state, and calculating a local stress concentration coefficient and an equivalent sealing performance index based on a finite element analysis result, and performance grading is performed on the foamed silica gel product based on the equivalent sealing performance index and the local stress concentration coefficient, and the dynamic sealing life is evaluated, so that the detection precision is improved.

This seedling-raising container contains silica particles. The silica particles include silica base particles having a particle size of 100 nm or more. The median particle size of the silica base particles is 120 nm to 800 nm in the particle size distribution of the silica base particles.

The present invention relates to a process for producing an antimicrobial coating on a glass substrate, an antimicrobial coated glass substrate prepared by the process and use thereof, the process comprising the steps of: i) providing a glass substrate having a first surface and a second surface; ii) providing a silicon containing solution and a particle containing solution; iii) mixing together the silicon containing solution and the particle containing solution to form a silica coating composition; iv) contacting at least said first surface of the substrate with the silica coating composition to deposit a layer of silica on the glass substrate; and iv) curing the silica coating composition deposited on the glass substrate to form a silica matrix coating layer, wherein the particles are deposited on and / or within the silica matrix coating layer wherein the particles are deposited on and / or within the silica matrix coating layer in an amount of from 0.1 to 20% by weight.

Refractory articles, anti-redox coating compositions, and methods of making refractory articles are provided. A refractory article includes a platinum (Pt)-based substrate and a coating layer for preventing a redox reaction on a surface of the Pt-based substrate, in which the coating layer for preventing the redox reaction includes, in terms of oxide, SiO2 in an amount of about 40 wt% to about 70 wt%, Al2O3 in an amount of about 20 wt% to about 52 wt%, B2O3 in an amount of about 3 wt% to about 6 wt%, and CaO in an amount of about 2.4 wt% to about 4.8 wt%; wherein the coating layer comprises whiskers distributed in a silica matrix, and wherein the whiskers comprise a polyaluminum andalusite crystalline phase.

Provided are pharmaceutical compositions and methods for preparing pharmaceutical compositions that preserve the coating of coated API particles in a pharmaceutical suspension. Pharmaceutical compositions include coated active pharmaceutical ingredient (API) particles comprising: an API particle; a first coating comprising one or more deformed components coating the API particle; a second coating comprising silica surrounding and / or partially or fully embedded into the first coating, a matrix former, and a structure former.

The invention discloses a monobenzyl biotin product as well as a preparation method and application of monobenzyl biotin. The preparation method of the monobenzyl biotin comprises the following steps: S1, extracting debenzylation liquid containing the monobenzyl biotin, and separating out a material containing the monobenzyl biotin in an extracted water layer; s2, carrying out column chromatography on the material containing the monobenzyl biotin to obtain an eluent; wherein during column chromatography, a filler of a chromatographic column is a styrene substance and / or a bonded silica gel substrate; s3, carrying out acid precipitation on the eluent to obtain a monobenzyl biotin crude product; carrying out recrystallization on the monobenzyl biotin crude product; wherein a reagent used in the recrystallization is C1-C4 alcohol or ketone. The yield of the monobenzyl biotin product prepared by the method for preparing the monobenzyl biotin is high, the mass content of the monobenzyl biotin in the product is high, and the preparation method is simple and low in cost.

This invention relates to an adsorption chromatographic material for technetium in radioactive waste and its preparation method, comprising the following steps: S1, purging air from the pores of a silica matrix; S2, mixing acetophenone, diethyl phthalate, vinylpyridine, and divinylbenzene evenly, then adding initiator azobisisobutyronitrile and initiator V-40 and mixing evenly to obtain a mixture; S3, mixing the mixture with the silica matrix under vacuum conditions, then restoring to atmospheric pressure, and then cycling under vacuum-atmospheric pressure conditions multiple times, finally restoring to atmospheric pressure; S4, subjecting the reaction system after restoring to atmospheric pressure to multiple continuous heatings, finally restoring to room temperature, and rinsing multiple times to obtain the adsorption chromatographic material. Compared with the prior art, this invention directly obtains a pyridine-type weakly basic anion exchange resin through copolymerization, eliminating the chloromethylation and amination processes in the traditional process, greatly simplifying the resin synthesis process, and improving the adsorption chromatographic material for technetium in radioactive waste. 99 Tc has a good adsorption effect.

The present disclosure provides methods and compositions for controlling asphaltenes in a subterranean formation. The compositions may include silica, a polymer, and optionally a charged surfactant. The compositions may also include a solvent or other additives. The methods may include injecting the compositions into subterranean formations and inhibiting asphaltene precipitation.

The present application relates to the technical field of caprolactam preparation process, and discloses a pre-fluidizing agent, a preparation method and application thereof.The pre-fluidizing agent is composed of a silicon dioxide matrix and optional impurity metal elements, the content of the impurity metal elements is not higher than 3000 ppm based on the total mass of the pre-fluidizing agent, the attrition index of the pre-fluidizing agent is not higher than 12% / h, the BET specific surface area is 210-300 cm 2 / g, and the bulk density is 0.7-1.1 g / cm 3 The pre-fluidizing agent provided by the present application has close physicochemical properties to real agents, is inert to the cyclohexanone oxime gas phase Beckmann rearrangement reaction process, can be used for the investigation of fluidized bed process blank experiment, and can obtain important basic data, such as the correction of instruments, meters, equipment, such as thermocouples and pressure difference meters, the circulation state of the catalyst of the reaction-regeneration system and the like, and can replace the gas phase rearrangement catalyst to obtain valuable data.