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543 results about "Silica microsphere" patented technology
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Method for constructing anti-reflection microstructure using single layer nanometer particle as etching blocking layer
InactiveCN101308219ASimple methodBase variableSemi-permeable membranesVolume/mass flow by thermal effectsSurface patternLight energy
The invention belongs to the surface patterning microstructure construction technique, which relates to a method for constructing a microstructure with anti-reflection performance on a foundation base by combining the self-assembly technique with the reactive ion beam etching technique. The method is to take monolayer polymeric micro-spheres, silicon dioxide micro-spheres and nano-particles of metal or metal oxides as a barrier layer and implement the RIE etching to the foundation base, then an approximate cone-shaped microstructure is constructed on the foundation base, and the structure has extreme high anti-reflection performance, thereby effectively improving the light energy utilization rate, reducing the interference of veiling glare in an optical system, increasing the optical transmittance, and further improving the sensitivity and stability of the optical system, and the method can be used for constructing large-area anti-reflection structures. The method of the invention has advantages of simple operation, changeable foundation base, strong applicability, good repeatability, low cost, high efficiency, adjustable anti-reflective applied wavelength and conformity to industrialized standards, and can be used for making photoelectric devices such as solar batteries and white light sensors.
Owner:JILIN UNIV
Emulsion composition
An emulsion composition for skin application comprises an aqueous component, one or more water-insoluble organic components totaling at least about 15 percent by weight of the composition, and about 2 to about 10 percent by weight of a solid component consisting of porous silica microspheres having an average particle size between about 5 μm and about 20 μm.
Owner:SCHERING PLOUGH HEALTHCARE PRODUCTS INC
Fluorine-containing bi-functional microspheres and application thereof
InactiveCN102304204AGood superhydrophobic and oleophobic propertiesImprove stabilitySilicaSpecial surfacesAdhesiveMicrosphere
Owner:GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
Substrate with surface-enhanced Raman scattering activity and preparation method thereof
The invention provides a substrate with surface-enhanced Raman scattering activity and a preparation method thereof, and the method comprises the following steps: the glass base surface is subjected to hydroxylation and amination treatment; catalytic hydrolysis is carried out on ethyl orthosilicate under the alkali condition by taking alcohol as a solvent; Silica microspheres with even size and smooth surface are prepared by an oscillation method; silane coupling agent of which the tail end is provided with amino is assembled on the surface of the silica microspheres; silver sol obtained by reducing sodium borohydride to silver nitrate through oscillation is assembled on the surface of SiO2-NH2NPs, and is diffused in water again after centrifugal separation and washing by distillated water; self assembly is carried out on the silver sol after being placed in SiO2@Ag NPs dispersion for 6-12h; the SERS active substrate is obtained after taking out from water and drying. In the SERS active substrate of the invention, the active particles and the substrate are combined firmly, thus being applicable to detecting unimolecular Raman signals in aqueous solution; the substrate can be used for SERS detection repeatedly, thus improving repeated utilization ratio of the substrate.
Owner:NORTHWEST NORMAL UNIVERSITY
Nano hollow silica dioxide micro-sphere/polyurethane composite aqueous paint and preparation method thereof
InactiveCN101250374AIncrease the degree of cross-linkingExcellent thermodynamic propertiesPolyurea/polyurethane coatingsEmulsion paintsMechanical equipmentSilicon dioxide
The invention belongs to the technical filed of water paint, which particularly relates to nanometer hollow silica sphere / polyurethane compound water paint and the process for preparation thereof. The water compound paint is chemically compounded by hollow SiO2 sphere, whose dimension is 50-250 nanometers, isocyanate terminated polyurethane prepolymer, catalyst and other auxiliary agents. Indoor temperature storage stability of the compound water paint is excellent, nanometer hollow SiO2 sphere and water polyurethane have excellent compatibility, hardness and compatibility of the water compound coating layer are greatly improved, and fire-resisting property and ultraviolet resistant performance are excellent. The process for preparation of the invention has the advantages of convenient and simple technique, high film coating quality, low production cost and extensive application prospect and the like, which has no pollution to environment, the water paint is a new generation environmental-friendly high-performance chemical product, which can be applied in the fields such as automobile coating, wood coating, construction, office furniture, leather, textile finishing, pigment printing and mechanical equipment.
Owner:TONGJI UNIV
Preparation method of monatomic dispersion catalyst with high catalytic performance
InactiveCN103566935AImprove catalytic performanceImprove stabilityPreparation by oxidation reactionsOrganic compound preparationAlkaneMicrosphere
The invention belongs to the technical field of catalysis and relates to a method for preparing a monatomic cobalt catalyst by roasting silicon dioxide pellets and immobilizing metalloporphyrin. The method is realized by adopting the following technical scheme: namely stirring and dispersing nano silicon dioxide particles, dropwise adding 3-aminopropyl triethoxy silane, so as to obtain amino modified SiO2 pellets, then linking monocarboxyl metalloporphyrin (CoTPCPP) onto an amino modified SiO2 carrier through organic complexing, carbonizing porphyrin through high-temperature calcination in an inert atmosphere, and loading highly dispersed cobalt atoms onto the amino modified SiO2 pellets, thus an amino modified silicon dioxide pellet loaded monatomic cobalt catalyst is obtained. The monatomic dispersion catalyst has high catalytic activity and stability on a molecular oxygen selective ethylbenzene catalytic oxidation reaction in absence of solvent; meanwhile, a preparation method is simple, and product quality can be easily controlled, so that the monatomic dispersion catalyst is applicable to the fields of alkane selective oxidation reactions and synthesis of medical intermediates.
Owner:HUNAN UNIV
One-component transparent waterborne polyurethane emulsion waterproof paint and preparation method thereof
InactiveCN105255348AImprove solubilityIncrease the amount of participationPolyurea/polyurethane coatingsSilicon dioxideTin
The invention discloses one-component transparent waterborne polyurethane emulsion waterproof paint and a preparation method thereof and relates to polyurethane waterproof paint. The waterproof paint comprises a resin phase and a nano-material phase. The preparation method comprises the following steps: diol and a hydrophilic chain extender are dried, and other prepolymerization monomers are dried; diol, diisocyanate, fluorine-containing acrylate monomers and hydroxyl-terminated siloxane after a dehydration process are added to a four-neck flask, the mixture is heated and added with an organic tin initiator for a reaction under the protection of nitrogen, and the mixture is heated and added with dimethylolpropionic acid for continuous reaction; after a reaction system is cooled, the chain extender and acrylate monomers are added for a reaction; after a prepolymer is cooled to the temperature lower than the room temperature, a neutralizer and a cross-linking agent are added; then deionized water is added for emulsification, and mixed liquor A is obtained; a silane coupling agent is dissolved in absolute ethyl alcohol, silica microspheres are added to absolute ethyl alcohol, and mixed liquor B is obtained; the mixed liquor B is added to the mixed liquor A, the mixture is heated, and a radical initiator is added for a reaction; an organic solvent is removed, and the one-component transparent waterborne polyurethane emulsion waterproof paint is obtained.
Owner:XIAMEN UNIV
Cosmetic composition in the powder form
InactiveUS6461595B1Easy to operateMinimizing small skin defectsPowder deliveryCosmetic preparationsSilicon dioxideMaterials science
The present invention refers to a cosmetic composition in the powder form comprising a basic portion and a specific portion, wherein the basic portion comprises a first load of mois-touch lamellar particles of coated mica and a second load of dry-touch spherical particles with statistical size distribution of substantially up to 16 micra consisting of hollow silica microspheres, a binding compound and a carrier comprising a lamellar mineral load with particles below 10 micra, preferably micronized talcum powder.
Owner:NATURA COSMETICOS SA
Functional hollow earth silicon microballoons and method for preparing same
The invention pertains to the technical field of composite materials and function materials, in particular to a functionalized hollow silica microsphere and a preparation method thereof. The functionalized hollow silica microsphere is formed by taking polystyrene microspheres with positive charge as a template and by taking alkali as an etchant and a catalyst to lead silane coupling agent to carry out condensation and hydrolysis on the surfaces of the polystyrene microspheres; meanwhile, the polystyrene microspheres are etched. The varied functional groups functionalized hollow silica microspheres prepared by the invention have small density, large specific area and special functional groups, thereby being used for absorbing heavy metals, proton exchange membrane conductivity modifiers, functional filling and functional material carriers.
Owner:TONGJI UNIV
Preparation method of mesoporous hollow spherical silver-loaded silicon dioxide antimicrobial
The invention relates to a preparation method of antimicrobial, and aims at providing a preparation method of mesoporous hollow spherical silver-loaded silicon dioxide antimicrobial, which comprises the following steps that polystyrene microspheres are added into mixed solution of ethanol with dissolved hexadecyl trimethyl ammonium bromide and de-ionized water to be uniformly mixed, then ammonia is added, ethyl orthosilicate is gradually dropped, the obtained solution is filtered, washed and dried to obtain compound powder with polystyrene being wrapped by silicon dioxide microspheres; the powder is subjected to heat preservation at the temperature of 550 DEG C to obtain hollow silicon dioxide microspheres; and under a light-resistant condition, the hollow silicon dioxide microspheres are soaked inside silver nitrate solution, and then the solution is filtered, dried and heated to the temperature of 300 to 500 DEG C so as to obtain the mesoporous hollow spherical silver-loaded silicon dioxide antimicrobial. The dispersivity and the stability of silver particles are improved, so that the agglomeration problem of traditional nano antimicrobial powder can be effectively solved. Meanwhile, the antimicrobial can be slowly released through mesoporous, the releasing of silver particles can be effectively maintained for a long time so as to realize the lasting antibacterial effect.
Owner:ZHEJIANG UNIV
Preparation method of echinoid titanium dioxide microspheres in single/double layer cavity structure
InactiveCN101941736ALarge specific surface areaEasy to shapeTitanium dioxideMicrosphereSilicon dioxide
The invention relates to a preparation method of echinoid titanium dioxide microspheres in single / double layer cavity structure, belonging to the field of nano composite materials. The method comprises the following steps: (1) preparing monodisperse silicon dioxide microspheres with uniform particle size; (2) by using silicon dioxide as a template, coating a titanium dioxide layer on the surface of the silicon dioxide microspheres by using a sol-gel method to obtain core-shell type silicon dioxide / titanium dioxide composite microspheres; (3) regulating the concentration of sodium hydroxide solution, the hydrothermal reaction time and other conditions, and preparing echinoid titanium-base microspheres in the single / double layer cavity structure in a controllable way; and (4) treating the echinoid titanium-base microspheres in the single / double layer cavity structure with hydrochloric acid with a certain concentration, and calcining at high temperature to obtain anatase-type echinoid titanium dioxide microspheres in the single / double layer cavity structure. The material prepared by the method has the high-activity pure-phase titanium dioxide crystal structure, and has the advantages of large specific area, complete appearance and high yield; the technical process is controllable and easy to operate; and the invention also has the advantages of low preparation cost, no pollution and low energy consumption.
Owner:UNIV OF SCI & TECH BEIJING
Preparation method of graphene oxide/silicon dioxide hybrid aerogel
A preparation method of graphene oxide / silicon dioxide hybrid aerogel comprises the following steps: A, adding 0.05-0.1 mol of a precursor into 9-18 ml of distilled water and dropwise adding a hydrolyst with its concentration of 0.2-0.6 mol / L into the precursor aqueous solution, wherein molar ratio of the hydrolyst to the precursor is 1:20-1:100; stirring at 20-30 DEG C for 5-8 h; adjusting pH value to 6-7 and stirring for 5-45 min so as to obtain a dispersion containing silicon dioxide microspheres; B, adding water to dilute the silicon dioxide microsphere dispersion by 5-50 times, carrying out iso-volume mixing on the diluted silicon dioxide microsphere dispersion and a graphene oxide dispersion with its concentration being 0.6-2 mg / ml, stirring for 10-30 min, carrying out ultrasonic treatment for 10-30 min so as to obtain graphene oxide / silicon dioxide hybrid aerogel; and C, freezing the hybrid aerogel under liquid nitrogen for 5-10 min, freeze-drying and dewatering to obtain the graphene oxide / silicon dioxide hybrid aerogel. The method is environmentally friendly, and the technology is simple. The prepared hybrid aerogel has advantages of complete gel network structure, high porosity, good adsorptivity, high strength, low density and the like.
Owner:SOUTHWEST JIAOTONG UNIV
Preparation method of covalent organic framework composite microspheres with core-shell structures
InactiveCN107175053AMild preparation conditionsRaw materials are cheap and easy to getOther chemical processesDispersed particle separationMicrosphereSolid phase extraction
The invention relates to a preparation method of covalent organic framework composite microspheres with core-shell structures. The method comprises the following steps: dissolving silicon dioxide microspheres, a first construction element and a second construction element in an organic solvent; and after adding a catalyst, rapidly synthesizing into the composite microspheres with core-shell structures at a certain temperature. In a preparation process, reaction conditions are gentle, the method is simple, and the yield is high; the prepared covalent organic framework composite microspheres have the advantages of good core-shell morphology, high specific surface area, ordered pore structures, good mechanical stability, thermal stability, chemical stability and the like, if the microspheres are used as a chromatographic stationary phase, the chromatographic mass transfer resistance can be reduced effectively, the theoretical plate height is improved, and finally, column efficiency and degree of separation are improved; and if the microspheres are used as solid-phase extracting filler, the enrichment effect can be improved remarkably. The covalent organic framework composite microspheres with core-shell structures have good application prospects in the aspect of separation and enrichment of small organic molecules.
Owner:FUZHOU UNIV
Hollow silicon dioxide microsphere with different surface configurations and preparation method thereof
The invention relates to a hollow silicon dioxide microsphere with different surface configurations prepared in the same system and a preparation method thereof, belonging to the technical field of functional inorganic powdery materials. The hollow silicon dioxide microsphere with the different surface configurations has the diameter of 500 nm-4 mum and the shell thickness of 40-125 nm; a spherical shell is formed by packing and connecting silicon dioxide nano particles; gaps among the silicon dioxide nano particles forming the spherical shell range from 0 nm to 100 nm; and the silicon dioxide nano particles forming the spherical shell have nano micropores or mesopores, pore diameters range from 1.6 nm to 2.4 nm, specific surface areas range from 290 m2 / g to 1400 m2 / g, and pore volumes range from 0.24 ml / g to 1 ml / g. The invention also provides the preparation method of the hollow silicon dioxide microsphere with the different surface configurations. The regulation and control means of the surface configuration of the hollow silicon dioxide microsphere is simple and easy to operate; the reaction process for preparing the hollow silicon dioxide microsphere with a multi-stage pore path structure is short; and especially the control means is simple.
Owner:UNIV OF JINAN
Double-shell medicine sustained and controlled releasing carrier material and preparation method and application thereof
InactiveCN101168062AThe release rate is easy to controlOvercoming physiological barriersAntibacterial agentsOrganic active ingredientsPolyelectrolyteControlled release
The invention relates to carrier materials of medicament sustained controlled release, a process for preparing the carrier materials and usage, in particular relating to carrier materials of double shell medicament sustained controlled release of a hollow silicon dioxde micro-balloon coated by pluralities layers f polyelectrolyte membranes, and the making method and usage of the carrier materials of double shell medicament sustained controlled release. The materials are prepared by the hollow silicon dioxde micro-balloon and the compatible polyelectrolyte. An inner shell of the carrier material of double shell medicament sustained controlled release is the hollow silicon dioxde micro-balloon, and an outer shell is composed of polarities layers of the polyelectrolyte membranes. A cavity of the hollow silicon dioxde micro-balloon can be a container for carrying medicament, and the polarities layers of the polyelectrolyte membranes of the outer shell can control the release rate of medicament molecules under different external environments. The carrier materials of double shell medicament sustained controlled release of the invention have high medicament-carrying capacity, and have certain targeting function, and environmental stimulus response of the medicament is release-controllable.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Method for preparing silicon dioxide magnetic composite microballoon with core-shell structure
ActiveCN101707106AThickness is easy to controlNarrow particle size distributionInorganic material magnetismInductances/transformers/magnets manufactureMicrosphereLayer thickness
The invention belongs to the field of the synthesis of magnetic nano materials, and relates to a method for preparing a silicon dioxide magnetic composite microballoon with a core-shell structure. The method comprises the following steps: adding magnetic iron oxide nano particles monodispersed in water into the mixing solution of alcohol and ultrapure water, and stirring for 0.3-2h; then adding 0.01-1ml of tetraethyl silicate in the mixture, and stirring for 0.3-2h; then adding 0.5-5ml of stronger ammonia water, continuing to stir for 2-24h, and obtaining the solution of the silicon dioxide magnetic composite microballoon with the core-shell structure; and using applied magnetic field for separating the microballon from the solution. In the invention, by proportioning the quantity of the reactant reasonably, and setting the reaction conditions reasonably, one or a plurality of the iron oxide magnetic nano particle(s) are covered in each produced silicon dioxide microballoon, and the microballoon has good balling performance and monodispersity, has controllable shell layer thickness and narrow particle size distribution, and is easy to clean, simple and convenient in operation, low in cost, less in waste, and high in productivity.
Owner:XIAN GOLDMAG NANOBIOTECH
Mesoporous nano silicon ball compound targeting drug delivery system as well as preparation method and application thereof
InactiveCN104474555AOvercoming multidrug resistanceSignificant effectOrganic active ingredientsPowder deliveryMicrosphereFluorescence
The invention relates to a mesoporous nano silicon ball compound targeting drug delivery system as well as a preparation method and application thereof. The preparation method of the mesoporous nano silicon ball compound targeting drug delivery system comprises the following steps: 1) preparing amino-functionalized drug loading mesoporous silicon dioxide microspheres; 2) preparing hyaluronic acid-hydrosulphonyl polypeptide-adriamycin (HA-RGD-DOX); 3) preparing mesoporous microsphere-hyaluronic acid-hydrosulphonyl polypeptide-adriamycin--paclitaxel (MSNs-HA-RGD-DOX_PTX); and 4) preparing fluorescent marker modified mesoporous microsphere-hyaluronic acid-hydrosulphonyl polypeptide-adriamycin--paclitaxel compound (MSNs-HA-RGD-DOX-PTX). The mesoporous nano silicon ball compound targeting drug delivery system has the beneficial effects that firstly multi-targeting synergistic drug delivery is realized, multiple tumour cells and tissues can be killed, and reversal drug resistance is good; secondly, blood stability is excellent; thirdly, invisibility, drug release degree and controlled release properties are good; fourthly, in vivo tracing function is good; and fifthly, the mesoporous nano silicon ball compound targeting drug delivery system has good general applicability.
Owner:WUHAN UNIV OF TECH
Preparation method and application of carbon dot photonic crystal having opal structure or inverse opal structure
ActiveCN105525343AEasy to operateLow costPolycrystalline material growthLiquid-phase epitaxial-layer growthPhotonic bandgapMicrosphere
The invention discloses a preparation method and application of a carbon dot photonic crystal having an opal structure or an inverse opal structure and having photonic band gap modulation of optical limiting and anti-fake performance. According to the method, with polystyrene microspheres as a raw material, a photonic crystal template is assembled by a vertical deposition method, then the carbon dot photonic crystal having the inverse opal structure is prepared by a sacrificial template method; or a carbon dot solution is added in the process of synthesis of silica microspheres, silica microspheres containing carbon dots and having different particle sizes are prepared, and then the carbon dot photonic crystal having the opal structure is assembled by a vertical deposition method. The obtained carbon dot photonic crystal has good optical limiting modulation behavior on laser according to difference of band gaps. At the same time, the prepared carbon dot photonic crystal is patterned by using a photoetching template, and can be used in anti-fake patterns with combination of the characteristic that the carbon dot photonic crystal emits fluorescence with different colors under different excitation light. The method has the advantages of simple operation and low cost, and is suitable for large-scale preparation of the carbon dot photonic crystal having special functions.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Polypyrrole hollow microsphere/ sulfur composite material as well as preparation method and application thereof
InactiveCN103259000AEnvironmentally friendlyReduce energy consumptionCell electrodesMicrospherePolypyrrole
The invention discloses a polypyrrole hollow microsphere / sulfur composite material which comprises a polypyrrole hollow microsphere and powdered sulfur, wherein the powdered sulfur is dispersed and absorbed on the polypyrrole hollow microsphere, so that a uniform compound can be formed. The invention also discloses a preparation method of the polypyrrole hollow microsphere / sulfur composite material. The method comprises the following steps of: firstly, initiating the polymerization reaction of pyrrole under the action of an oxidizing agent, and covering the surface of a silicon dioxide microsphere by the product; then washing, drying and then dissolving the silicon dioxide microsphere by hydrofluoric acid to obtain the polypyrrole hollow microsphere; and then, fully grinding the powdered sulfur with certain mass and the polypyrrole hollow microsphere, evenly mixing, and carrying out heat treatment at a certain temperature to obtain the polypyrrole hollow microsphere / sulfur composite material. The method is low in energy consumption, simple in operation, good in controllability, high in yield and suitable for large-scale production. The invention also discloses the application of the polypyrrole hollow microsphere / sulfur composite material. The polypyrrole hollow microsphere / sulfur composite material is used for a cathode material of a lithium sulfur battery and has the characteristics of high capacity and stable cycle performance.
Owner:ZHEJIANG NORMAL UNIVERSITY
Preparation of magnetic silicon dioxide microsphere with metallic ion chelated surface and use thereof
InactiveCN101323454APrevent leakageStrong forceSilicaPeptide preparation methodsProtein targetMicrosphere
The invention relates to a method for preparing magnetic silicon dioxide microspheres with the surfaces chelated with metal ions; the method of the inventioncomprises the following steps of preparation of the magnetic silicon dioxide microspheres, epoxidation of the magnetic silicon dioxide microspheres, carboxylation of the magnetic silicon dioxide microspheres and chelation technique of metal ions. Compared with the existing preparing method, the method of the invention has the advantages of reasonable design, simple operation and large amount of chelation of metal, etc. The magnetic silicon dioxide microspheres with the surfaces chelated with the metal ions, which are prepared by adopting the method, contain cobalt ions, have stronger bonding force with the modified microspheres so as to lead the cobalt ions to be not easy to leak out, and have higher selectivity and proper bonding strength with histidine on the protein, thus leading the magnetic silicon dioxide microspheres with the surfaces chelated with the metal ions to have high selectivity to hexameric histidine tag protein, and being easy to realize the separation and the purification of the target protein; the magnetic silicon dioxide microspheres with the surfaces chelated with the metal ions, which are prepared by adopting the method, can be used for separating the hexameric histidine tag protein.
Owner:SHAANXI NORMAL UNIV
Magnetic silicon dioxide microspheres modified with diethylaminoethyl and preparation method and application thereof
ActiveCN101628224ALarge amount of extracted nucleic acidReasonable designSugar derivativesOther chemical processesMicrosphereNanoparticle
The invention relates to magnetic silicon dioxide microspheres modified with diethylaminoethyl on the surface and a preparation method and an application thereof; the sol-gel method is adopted to prepare magnetic silicon dioxide microspheres which have ferroferric oxide nanoparticles as cores and silicon source, namely tetraethoxysilane as shells; by adopting the microspheres as template, alkylene oxide coupling agent 3-glycidoxypropyltrimethoxysilane (GPTMS) as activator and diethylaminoethyl hydrochloride as functional group, the magnetic silicon dioxide microspheres modified with diethylaminoethyl (DEAE) on the surface are prepared. The method comprises the preparation of magnetic silicon dioxide microspheres, the epoxidation of magnetic silicon dioxide microspheres and the DEAE surface modification. The method solves the problems that the bindingability between the existing magnetic microspheres and nucleic acid is not high, the preparation processes are complicated and the like. The bindingability between the magnetic microspheres prepared by the method and nucleic acid is high so as to be used to separate nucleic acid from the biological sample.
Owner:XIAN GOLDMAG NANOBIOTECH
Preparation method of mono-disperse silicon dioxide micro-spheres
The invention discloses a preparation method of mono-disperse silicon dioxide micro-spheres, which comprises the following steps of: (1) synthesizing mono-disperse silicon dioxide micro-sphere seeds by using a Stober method, namely at a reaction temperature of 10 to 60 DEG C, and in a solvent system of alcohol, water and ammonia, adding tetraethoxysilane alcoholic solution of which the concentration is 0.1 to 0.5 mol / L to react so as to obtain the mono-disperse silicon dioxide micro-sphere seeds; and (2) preparing the silicon dioxide micro-spheres from the silicon dioxide micro-sphere seeds by using a seed growth method, namely preparing silicon dioxide seed solution of which the concentration is 1,015 to 1,017 seeds / L by using the silicon dioxide micro-sphere seeds, the ammonia and the alcohol, and at the reaction temperature of 10 to 60 DEG C, adding ammonia-alcohol solution of which the concentration is 0.5 to 5.0 mol / L and tetraethoxy-silicane alkanol solution of which the concentration is 0.1 to 5.0 mol / L to react so as to obtain a suspension of the mono-disperse silicon dioxide micro-spheres.
Owner:纪志勇
Hollow nano silica microsphere modified polyacrylate nuclear shell structure composite emulsion and thin film
The invention relates to a method for preparing a hollow nano silica microsphere modified polyacrylate nuclear shell structure composite emulsion thin film. The thin film is prepared from a polyacrylate resin serving as a matrix and hollow nano silica microspheres prepared by a template method serving as filler through coupling agent treatment, ultrasonic dispersion, emulsion polymerization and coating process. The thin film has the characteristics of high damping property and mechanical property of the hollow nano silica microspheres prepared by the template method. The preparation method has the advantages of simple process, low cost, short period and convenient industrialized production.
Owner:张以河 +4
Method for preparing silver-carried silica microsphere functional materials
InactiveCN102764617ANo pollution in the processEasy to operateMicroballoon preparationMicrocapsule preparationSilica particleEtching
The invention discloses a method for preparing silver-carried silica microsphere functional materials. Monodisperse uniform spherical composite metallic silver-carried silica functional particles are prepared by chemical etching and metal salt pyrolysis methods, the particles are formed by uniformly loading nanometer metallic silver with the grain diameter of 5-50nm on the monodisperse multihole silica particles used as inner cores, so that the original silica particles have the special properties of nanometer silver particles. The particle obtained by the method has high purity and good monodispersity, the size of a product can be controlled by reaction conditions, and the method has wide application prospects. The method for preparing the silver-carried silica microsphere functional materials disclosed by the invention has a simple process and is environment-friendly, raw materials and equipment are cheap and are easy to obtain, and the cost is low. The synthesis time is short, the efficient is high, and the method has great industrial production prospects.
Owner:SHAANXI UNIV OF SCI & TECH
Nanometer core-shell silicon dioxide microsphere as well as preparation and application of antireflection composite coating solution
ActiveCN105964195AHigh light transmittanceHigh mechanical strengthCoatingsMicroballoon preparationPorosityMicrosphere
The invention relates to the field of anti-reflection technology for the surface of glass, and concretely relates to a nanometer core-shell silicon dioxide microsphere and a composite coating solution which is compounded by the nanometer core-shell silicon dioxide microspheres and aluminum silicon sol as well as preparation methods thereof. A cation type polystyrene emulsion is used as a hard template in order to prepare silicon dioxide dispersion liquid with a nanometer core-shell structure, the dispersion liquid and the aluminum silicon sol are compounded in order to prepare the coating solution for an antireflection film, toughening treatment is carried out for the coating solution in order to obtain the antireflection film. The raw materials are easy to obtain, and the antireflection film with a hollow structure is prepared by a simple process; pore spaces are arranged in particles and are not arranged in a silicon dioxide network, so that high light transmittance of the film is guaranteed, the light transmittance reaches 94.5% or above, and the porosity is high; the film has excellent smudginess resisting performance, the antireflection film and a glass substrate can be firmly combined, and the hardness of the film is high; because the surface of the film is compact, the film has good blocking effects for steam erosion, good weatherability, and industrialized application values.
Owner:DONGGUAN CSG SOLAR GLASS +1
Molybdenum disulfide/graphene hollow composite microsphere and preparation method therefor
ActiveCN106128784AUnique hierarchical porous hollow microsphere structureFacilitated DiffusionHybrid capacitor electrodesHybrid/EDL manufactureCapacitanceMicro nano
The invention relates to a molybdenum disulfide / graphene hollow composite microsphere with a layered porous hollow microsphere-shaped structure, and a synthetic method for the molybdenum disulfide / graphene hollow composite microsphere, and belongs to the technical field of micro-nano composite material preparation and synthesis. The method comprises the steps: firstly preparing a silicon oxide microsphere; secondly assembling a positive ion polyelectrolyte layer on the surface of the silicon oxide microsphere, and enabling the silicon oxide microsphere to be positively electrified; thirdly assembling a oxidized graphene layer on the surface of the positively electrified silicon oxide microsphere, and obtaining a silicon oxide / oxidized graphene composite microsphere; fourthly depositing and growing a molybdenum disulfide nanosheet on the surface of the silicon oxide / oxidized graphene composite microsphere through employing a hydrothermal method, reducing the wrapped oxidized graphene to graphene at the same time, and then obtaining a silicon oxide / graphene / molybdenum disulfide composite microsphere; finally removing a silicon oxide core through employing the hydrothermal method and excessive hydrofluoric acid, and forming the molybdenum disulfide / graphene hollow composite microsphere through synthesis. When the composite microsphere serves as the electrode material of a supercapacitor, the microsphere is large in specific capacitance, is excellent in circulating charging and discharging stability, and presents a good application prospect.
Owner:芽米科技(广州)有限公司
Method for latent fingerprint manifestation by magnetic fluorescent silicon dioxide
InactiveCN101690663AClear fingerprint patternSimple methodSilicaPerson identificationMicrosphereLatent fingerprint
The invention belongs to the technical field of detection, and particularly relates to a method for manifesting latent fingerprints. The invention provides the method for manifesting the latent fingerprints. A magnetic brush is used to attract magnetic powder; the powder forms a 'magnetic powder ear' under the action of magnetic force; and the latent fingerprints on the surfaces of A4 paper, sheet glass, plastic bottles, pop-top cans, sheet copper, aluminum foils, tables or experiment tables can be manifested by using the tip of the powder ear to slightly brush various object surfaces printed with the latent fingerprints. The method is based on magnetic ferroferric oxide nano-powder and utilizes an phase reversal microemulsion polymerization method to prepare fluorescent magnetic silica gel spheres; and the method jointly coats magnetic granular ferroferric oxide and dye molecules in silicon dioxide microspheres by utilizing the hydrolysis of TEOS under alkaline conditions to perform one-step synthesis of magnetic silica monodisperse gel spheres and dye-doped magnetic fluorescent silica gel spheres to obtain magnetic fluorescent multi-functional powder, can be applied to more conditions and ranges, and has simple operation and no toxic or side effect.
Owner:NORTHEAST NORMAL UNIVERSITY
Preparation method of ordered mesoporous silica microspheres with hollow structures
InactiveCN102718225ALow equipment requirementsLow costMaterial nanotechnologySilicaMicrosphereMesoporous silica
The invention discloses a preparation method of ordered mesoporous silica microspheres with hollow structures. The preparation method comprises the following steps: firstly, dissolving a cationic surface active agent in mixed solution of ethanol and water, sequentially adding ammonia water and a silicon source in the mixed solution under the conditions of heating and mixing, and reacting for a period of time to obtain solid silica microspheres; washing the obtained silica, transferring the silica into water for etching, and reacting for a period of time to obtain hollow silica microspheres; and finally, collecting the hollow silica, and obtaining products of ordered mesoporous silica microspheres with hollow structures by drying and roasting. In the preparation method, a sacrificial hard template or an emulsion template does not need to be prepared in advance. The preparation method has the characteristics of simple technological process, mild reaction conditions, low cost, and environmental friendliness; and the prepared hollow mesoporous silica microspheres have great application potential in ultrasonic imaging, drug delivery and other biomedical fields.
Owner:NANJING GENERAL HOSPITAL NANJING MILLITARY COMMAND P L A
Composite dental restoration resin with silica microspheres as filler and preparation method thereof
InactiveCN102552046AGood dispersionGood physical and mechanical propertiesImpression capsDentistry preparationsMicrosphereResin matrix
The invention relates to a composite dental restoration resin with silica microspheres as filler and a preparation method thereof. In percentage by weight, the resin consists of 25 to 34.7 percent of resin matrix, 0.3 percent of photoinitiator and 65 to 74.7 percent of silane coupling agent surface-modified inorganic filler. The preparation method includes the following steps: (1) preparing processed SiO2; (2) further obtaining modified monodisperse submicron silica microspheres; (3) uniformly mixing the resin matrix and the photoinitiator, so that the composite dental restoration resin is obtained. The physical and mechanical properties of the composite dental restoration resin obtained by the invention are excellent, the service life is long, the prices of materials are low, curing shrinkage is low, and the composite dental restoration resin can be used as photocured composite resin for dental restoration. The preparation method is simple, the materials are easy to obtain, and are relatively cheap, and the invention is suitable for industrialized production.
Owner:DONGHUA UNIV
Preparation and use of pore diameter controllable mesoporous silicon dioxide microsphere
The invention discloses a method for preparing a mesoporous silicon dioxide microsphere with controllable aperture. The method takes a novel tetra-quaternary ammonium salt cation surface active agent as a structure-directing agent and synthesizes the mesoporous silicon dioxide microsphere in an ethanol water system under the alkaline condition by a sol-gel method. The method has the advantages that the prepared silicon dioxide is micron spherical particles and has good monodispersion and large specific surface area; the mesoporous microsphere with large aperture can be prepared without an expanding agent; and the silicon dioxide microsphere prepared by the method has stable performance and is suitable for high-efficiency liquid-phase chromatographic separation and analysis.
Owner:EAST CHINA UNIV OF SCI & TECH
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