Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
1296 results about "Polystyrene microsphere" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Polystyrene Microspheres. Polystyrene microspheres present a flexible platform for applications in diagnostics and bioseparations. They may be coated with recognition molecules, such as antibodies, antigens, peptides, or nucleic acid probes, and can be loaded with hydrophobic dyes and other compounds.
Acoustic standing-wave enhancement of a fiber-optic salmonella biosensor
InactiveUS6391653B1Bioreactor/fermenter combinationsBiological substance pretreatmentsMicrosphereTest chamber
A fluorescent fiber-optic biosensor system using ultrasonic concentration of particles and cells for the detection of Salmonella typhimurium. A biosensor test chamber serves as an ultrasonic standing-wave cell that allows microspheres or cells to be concentrated in parallel layers or in a column along the axis of the cell. A fiber probe along the axis delivers laser excitation to fluorescent-labeled antibodies of Salmonella and collects the fluorescent signal. The Salmonella-antibody complexes are moved acoustically to the axis of the cell, increasing the fluorescent signal. Alternatively, the Salmonella-labelled antibody complexes attach to unlabeled antibodies that have been immobilized on the surface of polystyrene microspheres. This entire structure can be manipulated acoustically and the increase in the fluorescent signal, which can be an order of magnitude, indicates the presence of Salmonella.
Owner:BOARD OF GOVERNORS FOR HIGHER EDUCATION STATE OF RHODE ISLAND & PROVIDENCE PLANTATIONS
Alumina carrier with composite pore structure and preparation method thereof
ActiveCN102614934AExtend your lifeHigh selectivityCatalyst carriersMetal/metal-oxides/metal-hydroxide catalystsPolymer scienceMicrosphere
The invention discloses a preparation method of an alumina carrier with a composite pore structure, which comprises the steps of mixing and roasting an aluminum-contained compound and a composite template, wherein the composite template comprises a mesoporous template selected from at least one of a polyethylene glycol-polypropylene glycol-polyethylene glycol triblock polymer, polyethylene glycol, dodecylamine, hexadecyl trimethyl ammonium bromide, lauric acid, stearic acid and fatty alcohol polyoxyethylene ether and a macroporous particulate template selected from polystyrene microspheres with the particle size of greater than 50nm, polymethyl methacrylate microspheres, biomaterial particles, asphalt particles or heavy oil residues; and the weight ratio of the mesoporous template to the macroporous particulate template to the aluminum-contained compound (by alumina) is 0.1-2:0.1-0.7:1. The invention also discloses the alumina carrier simultaneously having mesoporous tunnels and macroporous tunnels prepared through the method, wherein mesopores account for 40-90% of the total pore volume, and macropores account for 10-60% of the total pore volume.
Owner:CHINA PETROLEUM & CHEM CORP
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
CRP monoclonal antibody nanometer latex microsphere composition and preparation process thereof
ActiveCN103073642ASmall variance between different production batchesQuality improvementImmunoglobulins against animals/humansCarrier-bound/immobilised peptidesTherapy monitoringMicrosphere
The present invention discloses a CRP monoclonal antibody, a CRP antibody nanometer latex microsphere composition and a preparation process thereof. According to the CRP antibody nanometer latex microsphere composition, CRP monoclonal antibodies with different epitopes and carboxylated polystyrene microspheres with different particle sizes are subjected to covalent cross-linking to form conjugates, and then the different conjugates are mixed according to a certain ratio to prepare the CRP monoclonal antibody nanometer latex microsphere composition. The CRP monoclonal antibody nanometer latex microsphere composition can be applicable for automatic biochemical analyzers and special protein analyzers, can be provided for full measuring range determination of C-reactive protein concentration in human whole blood and serum, and can be used in differential diagnosis of bacterial infections and viral infections, drug therapy monitoring and cardiovascular disease risk assessments.
Owner:深圳伯美生物医药有限公司
Preparation method of shape-controllable hollow carbon microsphere
The invention discloses a preparation method of a shape-controllable hollow carbon microsphere, belonging to the technical field of energy materials. The preparation method comprises the following steps of: firstly, preparing a polystyrene microsphere with monodispersity by adopting a soap-free emulsion polymerization method; modifying the surface of the polystyrene microsphere by acidizing treatment of concentrated sulfuric acid to enable the surface to have a sulfonic acid group (-SO3H-) with initiation activity to resol; then, dropping a resol ethanol solution into anhydrous ethanol in which the modified polystyrene microsphere is dispersed to enable the solution to carry out cross-linking reaction on the surface of the microsphere to prepare a compound microsphere in a core-shell structure; and finally, putting the compound microsphere in the inert gas protecting environment for carbonizing. The invention can effectively control the particle size of the hollow microsphere by changing the particle size of the microsphere, avoids an operating process of removing a template, effectively reduces the preparation processes, and can realize the purpose of controlling the shape of the hollow carbon microsphere only by changing one variable in the same system.
Owner:BEIJING UNIV OF CHEM TECH +1
Method for preparing monodisperse polystyrene microsphere with controllable grain diameter
InactiveCN101293936ALow purity requirementGood monodispersityHydrocarbon purification/separationHydrocarbonsPotassium persulfateMicrosphere
The invention belongs to the technology field of nanometer materials preparation, particularly relates to a preparation method of monodisperse polystyrene microspheres capable of controlling the particle size of the polystyrene microspheres within a certain range by changing the use amount of a stabilizer. The invention prepares polystyrene microspheres with simply purified styrene as a monomer, potassium persulfate as an initiator, water as a reaction medium and polyvinylpyrrolidone as a stabilizer by using soap-free emulsion polymerization. The preparation method uses electromagnetic stirring instead of electric stirring; and has the advantages of relatively low requirements for the uniformity of stirring speed, no need of surfactant, simple process, and low cost. The obtained polystyrene microspheres have good monodispersity, and the particle size thereof can be controlled within the range of 250-1,400nm by changing the use amount of the stabilizer. The monodispersed polystyrene microspheres have important application value as a module or template in construction of photonic crystals, inorganic / organic nanometer composite materials and hollow micrometer / nanometer spheres.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Method for preparing hollow carbon balls
InactiveCN101591016ALow costSuitable for industrial productsPolystyrene microsphereCaustic substance
A method for preparing hollow carbon balls belongs to the field of novel carbon material. The existing preparation method for hollow carbon balls has the problems such as use of strongly corrosive substances, high cost and the like. The invention obtains the product hollow carbon balls by 1) preparing polystyrene micro ball template with uniform diameters; 2) adding the polystyrene micro ball template into concentrated sulphuric acid for sulfonation to obtain polystyrene micro ball template with different sulfonation degrees by controlling sulfonation time; 3) using phenolic resin and sulfonated polystyrene micro ball template to prepare polystyrene / phenolic resin composite balls; and 4) carbonizing the composite balls. The method of the invention is simple, convenient and easy to execute, uses no corrosive substances, has low production cost, can be used as electrode material, energy and hydrogen storage material, lubricant, catalyst carrier and the like.
Owner:BEIJING UNIV OF CHEM TECH
Magnetic fluorescent microspheres and preparation method thereof
InactiveCN101787163AEasy to manufactureSimplify separabilityOrganic/organic-metallic materials magnetismMicroballoon preparationGenotype AnalysisMicroparticle
The invention relates to magnetic fluorescent microspheres and a preparation method thereof. The particle size of the magnetic fluorescent microspheres is 5-10 mu m, the fluorescence excitation wavelength range is 400-700nm, and the fluorescence intensity is not reduced within 24h. The prepration method comprises the following steps: adding a swelling agent into monodisperse carboxylated polystyrene microspheres, and adding magnetic nano microparticles into a swelling system; shaking on a decolorization shaker for 12-48h; using mixed solution of cyclohexane and ethanol for cleaning sediment, and sequentially carrying out ultrasonic dispersion and centrifugal separation till supernatant liquid is colorless under an ultraviolet lamp; and saving a final sediment product in 1ml of liquor. Compared with the existing magnetic fluorescent microspheres, the magnetic fluorescent microspheres have the advantages of uniform and controllable diameter, good fluorescence stability, simple preparation process, multiple types of fluorescence codes and the like, and can not only carry out fast separation and purification on reactants by being applied in the biological macromolecular detection, but also simultaneously detect a plurality of target molecules in a sample to be detected in a reaction tube and a hole, thereby being widely applied in the fields of immunoassay, nucleic acid hybridization, genotype analysis and the like.
Owner:TIANJIN UNIV
Ordered 2D and 3D nano structure metal material comprising hollow metal spheres and its prepn process
During the preparation of ordered nano structure metal material, correponding colloid crystal template is first prepared via capillary abstraction self-assembling method. Spacer is set between two parallel plates to form micro passage in the same thickness as the spacer, one end of the micro passage is soaked into microsphere emulsion so that the emulsion is driven by capillary effect to the micro passage to form ordered arrangement. The bottom of the micro passage is then soaked into sensitizing stannous ion solution, so that the surface of the microsphere has one layer of sensitizing stannous ion adsorbed and is sensitized. The present invention features the surface seed growing method and colloidal crystal of polystyrene microsphere as template. When the template is set inside chemical plating solution, some interval is formed between microspheres owing to electrostatic repulsion, and the interval permits forming metal shell in the outer surface of the medium microsphere.
Owner:NANJING UNIV
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
Preparation method for surface-enhanced Raman spectrum compound substrate
InactiveCN103512875ALarge area orderlyGood chemical stabilityRaman scatteringMicrosphereSurface-enhanced Raman spectroscopy
The invention discloses a preparation method for a surface-enhanced Raman spectrum compound substrate with stable chemical property. The preparation method comprises the following steps: transferring single-layer graphene which grows on a copper foil through the CVD (chemical vapor deposition) technology to a silver nano array prepared through a polystyrene microsphere template method, keeping warm at 50 DEG C for 30 min, and firmly binding the single-layer graphene and the noble metal nano array to form the surface-enhanced Raman spectrum compound substrate. The surface-enhanced Raman spectrum compound substrate prepared through the method has the advantages that the method is simple, the material is cheap, the substrate is large in area and ordered, the chemical property is stable, and the effects of sulfuration resistance and oxidation resistance are realized.
Owner:WUHAN UNIV
Efficient light extraction method and device
ActiveUS20090315013A1Enhanced and inexpensive and repeatable LED light extraction efficiencyEnhanced and repeatable light emitting device extraction efficiencySemiconductor/solid-state device manufacturingNanoopticsMicrospherePolystyrene microsphere
A tight emitting device comprises at least one p-type layer and at least one n-type layer and a microlens array surface. A method for improving light efficiency of a light emitting device, comprises depositing polystyrene microspheres by rapid convection deposition on surface of light emitting device; depositing a monolayer of close-packed SIO2 microspheres onto the polystyrene microspheres; and heal treating to convert the polystyrene microspheres into a planar microlayer film to provide a surface comprising substantially two-dimensional (2D) hexagonal close-packed S1O2 colloidal microsphere crystals partially imposed into a polystyrene monolayer film.
Owner:LEHIGH UNIVERSITY
Carboxylic fluorescent encoding microsphere and synthetic method thereof
InactiveCN101392172AEncoding implementationUniform sizeBiological testingFluorescence/phosphorescencePolystyrene microsphereCarboxylic group
The invention discloses a carboxylic fluorescent code microsphere and a synthetic method thereof, which relate to a high molecular material. A simple and easy method for synthesizing the carboxylic fluorescent code microsphere is provided. The carboxylic fluorescent code microsphere is a polystyrene microsphere, the surface of which contains carboxyl and is embedded with organic fluorescent molecules. The particle size of the microsphere is even, ranging from 1 to 10 Mum. By controlling reaction conditions, the microsphere is embedded with fluorescent materials in different types and quantities so as to realize the code of the fluorescent microsphere. A dispersion polymerization method is adopted to synthesize a polystyrene seed microsphere and then the carboxylic microsphere is prepared, and finally the carboxylic fluorescent code microsphere is prepared. The carboxylic fluorescent code microsphere synthesized has even and controllable particle size, stable fluorescent quality and small coefficient of variation and dispersion of fluorescence, thus being applicable to the analysis of liquid phase chips.
Owner:XIAMEN UNIV
Preparation method of polystyrene/gold composite microspheres
The invention relates to a preparation method of polystyrene / gold composite microspheres, which comprises the following steps: modifying polystyrene microspheres with a silane coupling agent, mixing with a chloroauric acid solution, and heating to carry out ionic selfassembly, wherein gold ions are fixed to the surface of the polystyrene microspheres through gold-nitrogen bonds; and after the solution is boiling, adding trisodium citrate to reduce the gold ions adsorbed onto the amino group in situ, thereby generating the core-shell structure in which a gold nanoparticle is coated on each polystyrene microsphere. The size of the gold particles and the coverage percentage of the gold particles on the polystyrene microspheres are controllable to some extent.
Owner:WUHAN UNIV
Polystyrene microsphere modified photosensitive resin for 3D printing and preparation method thereof
The invention provides polystyrene microsphere modified photosensitive resin for 3D printing, which consists of the following raw materials in parts by mass: 30-70 parts of acrylic ester, 30-70 parts of epoxy resin, 5-60 parts of polystyrene microsphere, 0.1-5 parts of light stabilizer, 10-30 parts of diluent, 0.1-10 parts of antifoaming agent, 0.1-10 parts of leveling agent, 0.1-5 parts of antioxidant, 1-10 parts of cationic initiator and 1-10 parts of free radical type photopolymerization initiator. The polystyrene microsphere modified photosensitive resin provided by the invention has the advantages of fast formation, high mechanical strength, good dimensional stability and the like; moreover, the preparation process is simple and can be directly applied and popularized to the preparation of complicated-structure components in the field of 3D printing.
Owner:滁州格美特科技有限公司
Preparation of core/shell structural polystyrene/titanium dioxide composite photo catalyst
InactiveCN101537349AImprove photocatalytic activityLow densityOrganic-compounds/hydrides/coordination-complexes catalystsCatalyst activation/preparationPhotocatalytic reactionMicrosphere
The invention relates to preparation of core / shell structural polystyrene / titanium dioxide composite photo catalyst, comprising the steps of: (1) dissolving titanium alkoxide in absolute lower alcohol to be prepared into aqueous alcohol solution of titanium alkoxide with the concentration of titanium alkoxide in the lower alcohol being 0.004-0.100mL / Ml; (2) adding polystyrene microballs into the aqueous alcohol solution of titanium alkoxide to experience ultra-sound and stirring to obtain a uniform mixture; (3) placing a crucible holding, the polystyrene microballs and the aqueous alcohol solution of titanium alkoxide in a closed container, heating the closed container to 70-200 DEG C for heat treatment and preserving temperature for 1-96 hours; washing and drying to obtain the core / shell structural polystyrene / titanium dioxide composite photo catalyst. The photo catalyst prepared by the invention maintains the characteristic of high catalytic activity of titanium dioxide nano crystal grain, and has the photo catalytic activity similar to the photo catalytic activity of nano titanium dioxide prepared by gas phase method in the majority of photo catalysis reactions.
Owner:DONGHUA UNIV
Preparation method of hollow bowl-shaped carbon-based metal oxide composite material
ActiveCN104241602AIncrease packing densityHigh packing density, greatly improving the volumetric energy density of the batteryCell electrodesSecondary cellsHexamethylenetetramineOxide composite
The invention discloses a preparation method of a hollow bowl-shaped carbon-based metal oxide composite material. The preparation method comprises the following steps: preparing a precursor of the hollow bowl-shaped carbon-based metal oxide composite material through a precipitation method; carrying out calcination carbonation to obtain a hollow bowl-shaped carbon-based metal oxide composite lithium storage active material; preparing component and structure controllable composite by adjusting the ratio among a template, metal salt, hexamethylenetetramine and citrate, so as to realize the purpose of controllable electrochemical performance. The preparation method has the characteristic that a hollow bowl-shaped polystyrene micro ball template is adopted and hollow bowl-shaped carbon-based metal oxide composite materials of various components are prepared through a common method; not only does the material of the shape reserve all the advantages of a hollow structure material, more importantly, the problem that the space utilization rate of the hollow material is low, is solved; the filling density of the active material is improved; the volume energy density is extremely improved; thus the energy density, capacity, cycle performance and magnification performance of a single cell are improved.
Owner:XI AN JIAOTONG UNIV
Raspberry-like polystyrene microsphere/silicon dioxide composite particles and preparation method and use thereof
The invention belongs to the technical field of nanomaterial preparation and particularly relates to raspberry-like polystyrene microsphere / silicon dioxide composite particles and a preparation method and use thereof. In the invention, the monodispersed raspberry-like polystyrene microsphere (core) / silicon dioxide (shell) organic-inorganic composite particles are prepared by using polystyrene microspheres treated by oxygen plasma as cores and by a sol-gel process. The preparation method is to perform hydroxylation on the surfaces of the polystyrene microspheres by using the oxygen plasma treatment process which is simple and low in cost. The prepared raspberry-like polystyrene microsphere(core) / silicon dioxide(shell) organic-inorganic composite particles can be used as building modules, and a porous silicon dioxide hollow sphere coating, which has ultrahigh hydrophily and antifog performance, is formed on glass by an electrostatic layered self-assembly process.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Surface hydrophilic modification of polystyrene material and product
ActiveCN101440168AIncreased hydrophilicityReduced non-specific adsorption capacityComponent separationChromatographic separationMicrosphere
The invention provides a method for preparing surface hydrophilic modified polystyrene materials, and a product thereof, and the method is characterized by grafting and coupling the surface of polystyrene with a layer of hydrophilic macromolecular polyvinyl alcohol (PVA) through a stable chemical bond, particularly performing hydrophilic modification on the surfaces of super-macroporous polystyrene microspheres. The method comprises the following concrete steps: (1) benzene ring of polystyrene is subjected to halogen acetylation or halogen methylation in an organic solvent under the action of acidic catalysts through Friedel-Crafts reaction, and is added to active radical halogen acetyl or halogen methyl; and (2) under alkaline conditions and the action of phase transfer catalyst, Williamson etherification is utilized to couple the hydrophilic PVA to the surface of polystyrene through ether linkage. The method has the advantages of simple operation and mild conditions. A hydrophilic coating is stable, not easy to fall off and rich in hydroxyl. The method has great application potential in biotechnology, particularly the chromatographic separation field.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Biomechanical experiment simulation device for implantation of intravascular stent
The invention discloses a biomechanical experiment simulation device for implantation of intravascular stent, which consists of an artificial cardiovascular system, an artificial blood and pulsatile blood flow field control system and a mechanical experiment observation device. The upper part of a liquid storage box of the artificial cardiovascular system is soaked in a silica gel ventriculus sinister model geometrically similar to the ventriculus sinister; the inlet end of the silica gel ventriculus sinister model is connected with the open liquid storage box through a silica gel hollow round ball simulating the right atrium; the outlet end of the silica gel ventriculus sinister model is connected with an aortic arch model; a microcomputer of the artificial blood and pulsatile blood flow field control system is connected with a power amplifier, a linear step motor and a piston in turn; and artificial blood with similar blood viscosity and specific gravity and containing simulated thrombus particles polystyrene microspheres is arranged in a closed-loop blood flow field model. Through the device, a simulated operation for stent implantation can be effectively and visually preformed between the clinical experiments and animal experiments on the intravascular stent, and effective biochemical evaluation on the flexibility, strength and stability of the stent can be realized.
Owner:SOUTH CHINA UNIV OF TECH
Method for preparing monodisperse hollow meso-porous silicon dioxide nanometer particles
InactiveCN103803565ALow priceEasy to operateMaterial nanotechnologySilicaMicrosphereBiocompatibility Testing
The invention relates to a method for preparing monodisperse hollow meso-porous silicon dioxide nanometer particles, belonging to the field of inorganic nanometer materials. According to the method, styrene, acrylamide, G570 and deionized water are added into a reactor and then heated to 60-80 DEG C, an initiator is added into the reaction system after the reaction system is blown by nitrogen gas, and polystyrene microspheres are obtained after reaction; the polystyrene microsphere solution and a cationic surfactant are added into a PBS buffer solution and then put into the reactor after ultrasonic dispersion, tetraethyl orthosilicate is added into the reactor, centrifugation is carried out after reaction, and the monodisperse hollow meso-porous silicon dioxide nanometer particles are obtained by drying and calcining of the precipitates. The method has the advantages of simplicity in operation, mild reaction conditions, low price of experimental materials, good economy and short reaction period, the meso-porous material prepared according to the method has uniform size, small density, large specific surface area, high drug loading and good biocompatibility, is easily subjected to surface modification, and does not have the problem of silicon source self-polycondensation; and based on the method, control on the inner diameter of the hollow meso-porous silicon dioxide nanometer microspheres is achieved.
Owner:XIAMEN UNIV
Preparation method of superhigh-specific-area monodisperse polymer microspheres
The invention provides a method for preparing superhigh-specific-area monodisperse polymer microspheres, which comprises the following steps: adding monomer, divinylbenzene, vinyl benzyl chloride, deionized water, initiator azodiisobutylamidine hydrochloride and co-stabilizer cetyl alcohol into a reaction vessel, carrying out ultrasonic dispersion in a cell crusher for 3 minutes, heating to 70 DEG C, reacting for 12 hours, centrifuging, washing and drying to obtain lightly-crosslinked monodisperse prepolymer microspheres; and swelling the monodisperse prepolymer microspheres, dispersion medium and Lewis acid catalyst at room temperature for 24 hours, heating to 80 DEG C, reacting for 8 hours, centrifuging, washing and drying to obtain the superhigh-specific-area monodisperse polystyrene microspheres. The particle size of the polystyrene microspheres is 600-750 nm, and the particle size distribution coefficient is less than 8.5; the maximum specific area can reach 1255 m<2> / g, and the maximum pore volume can reach 0.78 cm<3> / g; the average pore size is 2.3-2.7 nm, and the pore size distribution is narrow; and the maximum adsorption capacity for hydrogen can reach 2.15 wt%.
Owner:嘉善县国创新能源研究院
Preparation method of metal and metal oxide hollow microspheres with adjustable particle sizes
The invention relates to a preparation method of metal and metal oxide hollow microspheres with adjustable particle sizes. The preparation method mainly comprises the following steps: firstly preparing micron-grade monodispersed polystyrene (PS) microspheres by a dispersion and polymerization method; secondly preparing composite particles with metal coatings by using a chemical coating method; finally removing PS kernels by adopting a solvent etching or high-temperature calcining method, to obtain metal or metal oxide microspheres with hollow structures. By changes of process parameters such as the use amount of monomers and initiators and the reaction time, the particle size of each PS microsphere can be controlled, so that adjustment of the particle sizes of the metal and metal oxide hollow microspheres can be realized.
Owner:ZHONGBEI UNIV
Hollow ceramic microsphere and preparation method of hollow ceramic microsphere
InactiveCN103387395AAvoid heat conductionPlay a thermal insulation effectThermal insulationMicrosphere
Owner:TIANJIN CHENGJIAN UNIV
Chemical preparation method of silver dendritic structure period arrangement
The invention relates to a chemical preparing method for a silver tree dendritic morphology periodic array, concretely relating to a preparing method for a chemical electrodeposit silver tree dendritic morphology array which takes a polystyrene microballoon colloid crystal as a primary templet and takes a periodic array zinc oxide inverse opal structure as a secondary templet. The polystyrene microballoon used by the invention is prepared by the method of emulsion polymerization, which adopts a vertical pulling method to acquire a polystyrene two-dimension colloid crystal templet from the surface of a conductive glass and adopts a chemical electrodeposit method to acquire the secondary templet of periodic array zinc oxide inverse opal structure by depositing the zinc oxide in the interspace of the polystyrene colloid crystal microballoon; and then the chemical electrodeposit method is adopted to deposit a silver tree dendritic morphology unit in a cavity of the zinc oxide inverse opal structure to acquire the silver tree dendritic morphology array.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Porous yttrium-cerium-zirconium solid solution and preparation method thereof
InactiveCN101637721AHigh chemical activityIncrease the areaDispersed particle separationSolid fuelsMicrosphereHeat stability
The invention provides porous yttrium-cerium-zirconium solid solution and a preparation method thereof; the structural general formula of the porous yttrium-cerium-zirconium solid solution is as follows: Ce<x>Zr<0.9-x>Y<0.1>O2. The preparation method comprises the following steps: adding protective agent, mixed metal salt solution and activity polystyrene microballoon emulsion into precipitator, reacting for 1-2 hours in the normal temperature, ageing for 1-3 hours in the temperature of 80-100 DEG C, collecting precipitate, washing, dried for 1-5 hours in the temperature of 80-150 DEG C, roasting dry products for 1-6 h in the temperature of 300-1000 DEG C to obtain the porous yttrium-cerium-zirconium solid solution. The invention has higher specific surface area, heat stability, excellentchemical activity, high oxygen storage capability and high temperature heat stability, and has wide application in automobile exhaust cleaning catalyst, catalytic combustion catalyzer and other catalyzers.
Owner:SHANGHAI HUAMING HI TECH GRP
Preparation method of layered porous carbon particles in yolk-shell structure
The invention belongs to the field of inorganic nanometer material synthesis and particularly relates to a preparation method of layered porous carbon submicron particles in a yolk-shell structure. According to the preparation method, resorcinol and formaldehyde are used as carbon sources, hollow polystyrene microspheres are used as templates, firstly, a middle shell layer is formed, and then, the resin core and the outermost layer resin shell layer are formed, so a resin-polystyrene resin core-shell-shell sandwich structure is formed, finally, the carbonization and the activation are carried out, and the layered gradient porous carbon submicron particles with the yolk structure appearance are obtained. The particle diameter can be controlled through controlling the grain size dimension of template microspheres, and the hole structure can be controlled through changing the concentration of carbon source precursor solution. The preparation method provided by the invention has the characteristics that the raw material cost is low, the preparation method is simple, and the industrialization is easy to realize.
Owner:UNIV OF SCI & TECH BEIJING
Synthetic method for micro-size polymer fluorescent microspheres
InactiveCN102115508ASolve the limited scope of applicationCoatingsLuminescent compositionsMaterials sciencePolyvinylpyrrolidone
The invention relates to a synthetic method for micro-size polymer fluorescent microspheres and aims to solve the problem of limited application range since the size of fluorescent microspheres is only defined between nanometer and submicron. The synthetic method comprises the following steps: firstly, synthesizing Na2SeSO3 solution; secondly, synthesizing quantum dots QDs1 with high quality; thirdly, preparing pure quantum dots QDs2; fourthly, adding the quantum dots QDs2 in styrene solution for shaking; fifthly, adding polyvinylpyrrolidone and absolute ethyl alcohol in a four-necked flask, then feeding N2 into the four-necked flask, and dripping the styrene solution to obtain an emulsion sample after polyreaction; and sixthly, performing centrifugal settling, washing and drying to the emulsion sample to obtain polystyrene microspheres. The quantum dots are wrapped in the polymer microspheres by the dispersion polymerization method to obtain 1-10 mu.m fluorescent microspheres, the fluorescent microspheres can be applied to the field of biomarkers, coating fillers, optical encoders and the like, and the method can be used for the synthesis of fluorescent microspheres.
Owner:HEILONGJIANG UNIV
Method for preparation of composite chromatographic stuffing of polymer carbon nanometer tube
InactiveCN101513607AHomogeneous monodisperseAchieve simultaneous separationOther chemical processesMicroballoon preparationOrganic acidFoaming agent
The invention provides a method for the preparation of the composite chromatographic stuffing of the polymer carbon nanometer tube, comprising: taking polystyrene-divinylbenzene and carbon nanometer tube as the base material, adopting the dispersion polymerization method to prepare monodispersity linear polystyrene microsphere seed, activating the feed, taking uni-step seed swell method to prepare the polystyrene-divinylbenzene and carbon nanometer tube composite microsphere, extracting to remove the pore-foaming agent to obtain the chromatographic stuffing, packing column by the uniform method. The stuffing prepared by the method has uniform granularity without screening and enhanced hardness compared with the traditional polymer chromatographic stuffing, can bear bigger pressure and is suitable for the new UPLC. The obtained polystyrene-divinylbenzene and carbon nanometer tube liquid phase chromatographic column can be stably used for the ion-pair chromatograph for along time and better performs the simultaneous separation of over ten organic acids.
Owner:ZHEJIANG UNIV
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com