1294 results about "Polystyrene microsphere" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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%.

The invention relates to a hollow ceramic microsphere and a preparation method of the hollow ceramic microsphere, belonging to the technical field of ceramic microspheres. The hollow ceramic microsphere is a ceramic ball with a hollow structure, and the hollow ceramic ball is in a core-shell structure formed by cladding TiO2 on SiC. The preparation method of the hollow ceramic microsphere comprises the following steps: 1. preparation of a solid microsphere: (1) producing a polystyrene microsphere; (2) carrying out sulfonation; and (3) cladding a layer of ceramic precursor; 2. cladding the TiO2 on the surface of the polystyrene solid microsphere clad with the ceramic precursor: (1) dispersing the microsphere in a mixed solution of ethanol and dibutyl phthalate; (2) adding acid and deionized water into the mixed solution; and (3) carrying out hydrothermal treatment to obtain the polystyrene solid microsphere clad with the ceramic precursor; and 3. preparation of the hollow ceramic microsphere: placing the polystyrene solid microsphere clad with the ceramic precursor with the surface being clad with the TiO2 in a vacuum furnace for sintering to obtain the hollow ceramic microsphere. The hollow ceramic microsphere and the preparation method have the advantages of high product activity, excellent performance, good thermal insulation effect, wide applicable range and the like.

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.

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.

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.