380 results about "Polystyrene microsphere" patented technology

The invention provides a flexible HP-ZIF-67 (at) Au surface enhanced Raman scattering substrate for multi-phase detection of volatile organic gas and pesticide residues, and a preparation method and application thereof, and belongs to the technical field of volatile organic gas and pesticide residue detection. The preparation method comprises the following steps: preparing a polystyrene microsphere template by taking polyvinylpyrrolidone, styrene and potassium persulfate as raw materials, then adding 2-methylimidazole and cobalt nitrate to obtain HP-ZIF-67 particles, dispersing the HP-ZIF-67 particles on an aluminum foil to obtain an HP-ZIF-67 substrate, and continuing to diffuse and deposit a gold nanoparticle layer to obtain the flexible HP-ZIF-67 (at) Au surface enhanced Raman scattering substrate. The flexible HP-ZIF-67 (at) Au surface enhanced Raman scattering substrate provided by the invention has the advantages of stable process, high sensitivity and multiphase detection, and a novel composite material is provided for volatile organic gas and pesticide residue detection.

The invention discloses a preparation method of sandwich type immunomagnetic beads with high thermal stability, which comprises the following steps: by taking polystyrene microspheres as a template, introducing oil-phase Fe3O4 nanoparticles into the polystyrene microspheres through a swelling method, and then carrying out hydrolytic condensation reaction on the surface of a microsphere assembly by utilizing n-octyltrimethoxysilane OTMS to obtain the sandwich type immunomagnetic beads with high thermal stability. The preparation method comprises the following steps: carrying out surface amination modification on a silicon dioxide thin layer which is grown by hydrolysis of tetraethoxysilane TEOS to realize coating of an outermost organic shell layer, carrying out surface amination modification, and carrying out cross-linking on 1, 4-butanediol diglycidyl ether and erythritol on the surface to form an epoxy polymer layer so as to obtain the sandwich-type immunomagnetic bead with a cross-linked epoxy polymer layer introduced to the outer layer. According to the epoxy group modification process on the surface of the magnetic bead, a direct cross-linking modification process is adopted, so that the operation steps are simplified, and the obtained epoxy group magnetic bead is ensured to show excellent biocompatibility. In addition, the method omits the tedious process of functional group activation, and allows direct coupling with the antibody, thereby greatly improving the efficiency and convenience of the experiment.

The invention relates to the technical field of UV paint for floors, in particular to UV paint for SPC floors and a preparation method of the UV paint. The UV paint for the SPC floor is prepared from the following raw materials in parts by mass: 50 to 100 parts of UV resin, 20 to 40 parts of 1, 6-hexanediol diacrylate, 20 to 40 parts of a mixed solvent, 5 to 15 parts of polystyrene microspheres, 1 to 5 parts of tetraethoxysilane, 0.1 to 1 part of sodium dodecyl benzene sulfonate, 0.1 to 1 part of a silane coupling agent, 1 to 2 parts of diphenylmethane diisocyanate, 1 to 2 parts of a flatting agent, 1 to 2 parts of a photoinitiator and 1 to 2 parts of a delustering agent, the UV resin comprises urethane acrylate with the functionality of 2 to 3 and urethane acrylate with the functionality of 4 to 6. The paint film obtained by the invention has the advantages of high curing speed, strong adhesive force, good flexibility and excellent wear resistance, and is especially suitable for preparing SPC floors.

The invention relates to the technical field of rubber additives, in particular to a cross-linking agent for rubber and a preparation method. The cross-linking agent for rubber is prepared from the following raw materials in parts by mass: 5 to 10 parts of polystyrene microspheres, 1 to 5 parts of tetramethyl orthosilicate, 0.1 to 0.5 part of copper sulfate, 1 to 2 parts of a surfactant, 1 to 2 parts of vinyl trimethoxy silane, 0.01 to 0.1 part of an initiator, 2 to 6 parts of vinyl acetate, 1 to 2 parts of cobalt acetate, 0.01 to 0.1 part of yttrium chloride and 1 to 2 parts of graphene oxide. Transition metal salt and rare earth are compounded and loaded on the surface of grafted silicon dioxide, the specific surface area of the metal salt can be effectively increased, the coordination efficiency is improved, the adding amount of the metal salt is reduced, meanwhile, self-repairing of crosslinking and reinforcing functions can be effectively achieved, and the crosslinking agent is high in stability and has higher environmental tolerance.

The invention belongs to the technical field of conductive microsphere preparation, and particularly relates to a surface-roughened nickel-plated conductive microsphere and a preparation method and application thereof. The preparation method comprises the following steps: carrying out pretreatment to enable the surfaces of the polymer microspheres to contain nickel ions, reducing the nickel ions into nickel nanoparticles, activating the microspheres and carrying out chemical plating. According to the invention, the specific surface area of the conductive microspheres is increased by reducing the nickel nanoparticles on the surfaces of the microspheres, a large amount of impurities cannot be generated among the microspheres, and adhesion among the microspheres can be effectively prevented. According to the prepared conductive microspheres, the plating layer and the polystyrene microspheres are firmly combined, and the risk that the conductivity is reduced due to the fact that the surface of the plating layer falls off is reduced. The preparation method is safe, environment-friendly, simple, convenient and suitable for industrial production requirements.

The invention relates to the technical field of in-vitro diagnostic kits, in particular to carboxyl polystyrene microspheres, a preparation method and application of the carboxyl polystyrene microspheres in a kit for quantitatively detecting MxA. The preparation method of the carboxyl polystyrene microspheres comprises the steps that firstly, polystyrene microspheres with the surface rich in aldehyde groups are prepared through a soap-free emulsion polymerization method; then carrying out a Schiff alkali reaction with 2-aminoethyl methacrylate hydrochloride to carry out double bond modification on the surface of the microsphere, and meanwhile, improving the hydrophilicity of the microsphere by an ester group and an imino group; and finally, carrying out sulfydryl-double bond addition reaction on the polystyrene microspheres and mercaptosuccinic acid to generate the polystyrene microspheres rich in carboxyl on the surfaces. The carboxyl polystyrene microspheres prepared by the invention can improve the binding efficiency of latex and an MxA antibody, so that the detection sensitivity is improved, the purpose of high-sensitivity quantitative detection of MxA protein can be achieved, and the detection time is greatly shortened.

The invention belongs to the field of environmental analytical chemistry, and provides a method for preparing micro / nano plastic based on stable isotope labeling and application of the micro / nano plastic. Specifically, an initiator, a pH buffer solution, ultrapure water, an emulsifier and a deuterated styrene monomer are mixed and emulsified through an emulsion polymerization method, a polymerization reaction is performed after emulsification, and then the deuterated polystyrene microspheres are obtained through cleaning and drying. According to the method, high sensitivity, high accuracy and safety of deuterium labeling are utilized, and a new research thought is provided for deeply researching the migration and transformation rule of the micro / nano plastic in the environment and long-term influence of the micro / nano plastic on organisms. The method is expected to promote the wide application of a hydrogen stable isotope labeling quantitative technology in the field of environmental science, and provides a scientific basis for evaluating the influence of the micro / nano plastic on the ecological environment and human health.

The invention discloses a preparation method of Ni / S co-doped hollow carbon spheres for producing H2O2 through efficient electro-catalysis ORR. The preparation method comprises the following specific steps: dispersing polystyrene microspheres, nickel nitrate hexahydrate, thiosemicarbazide and dopamine hydrochloride into a tris (hydroxymethyl) aminomethane buffer solution to obtain a mixed solution; performing centrifugation, washing, drying and drying treatment to obtain precursor powder; and carrying out high-temperature calcination on the precursor under the protection of N2, cooling to room temperature, and carrying out acid leaching, water washing and drying on the product to obtain the Ni / S co-doped hollow carbon spheres. Benefited from the regulation and control effect of doped S on an Ni atom electronic structure and the synergistic effect of a hollow structure with a high specific surface area, the Ni / S co-doped hollow carbon sphere has extremely high H2O2 selectivity and excellent catalytic activity in an alkaline 2e-ORR process, and shows high H2O2 yield and Faraday efficiency in an electrocatalytic H2O2 production test.

The invention discloses cobalt molybdenum nitride / cobalt modified nitrogen-doped hollow carbon microspheres as well as preparation and application thereof, and relates to the technical field of electrochemical energy storage devices. Carboxylated polystyrene microspheres, soluble zinc salt and cobalt salt, phosphomolybdic acid and 2-methylimidazole are dispersed in methanol, a PMA (at) ZnCo-ZIFs / PS precursor of a spherical structure is obtained, then the PMA (at) ZnCo-ZIFs / PS precursor is placed in an inert atmosphere for carbonization treatment, and the cobalt molybdenum nitride / cobalt modified nitrogen-doped hollow carbon microsphere material is obtained. According to the structure and the preparation method, the nitride / metal cobalt component and the nitrogen-doped sodium affinity sites are introduced at the same time, uniform transportation and nucleation of sodium ions are effectively induced, sodium metal is guided to deposit in a specific three-dimensional structure, growth of sodium dendrites is effectively inhibited, volume expansion of metal sodium in the reaction process is relieved, the preparation method is simple and convenient, and the preparation method is suitable for industrial production. The cost is low, the electrochemical performance of the sodium metal battery assembled by using the composite material can be remarkably improved, and the composite material has a good large-scale application prospect.

The invention discloses a tunnel waste slag unfired water permeable brick and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 30-80 parts of tunnel waste slag, 10-30 parts of filler, 10-30 parts of fly ash, 20-50 parts of cement, 1-3 parts of a water reducing agent, 4-8 parts of a pore forming agent and 10-20 parts of water. The unfired high-performance water permeable brick is prepared by adopting the tunnel waste slag as aggregate, adding a proper amount of Portland cement and fly ash and adopting a compression molding method. By optimizing the raw material formula and the preparation process, the mechanical strength and the water permeability of the water permeable brick are improved. The combined use of the silica fume and the iron tailings and the combined use of the szaibelyite and the szaibelyite in the formula improve the mechanical property of the material, and the combined use of the perlite and the polystyrene microspheres improves the water permeability of the material.

The invention discloses a solid-phase microextraction derived fiber head and a preparation method and application thereof, the solid-phase microextraction derived fiber head comprises a solid-phase matrix and polystyrene microspheres adhered to the surface of the solid-phase matrix, and a chitosan cross-linked network layer is also cross-linked on the polystyrene microspheres; cysteine is also adsorbed on the polypropylene microsphere and chitosan cross-linked network layer. According to the solid-phase microextraction derivative fiber head, a large number of hydrophilic action sites such as amino groups and carboxyl groups exist on the surface, so that synchronous extraction and detection of the contents of three target analytes, namely cysteine-chlorothalonil association compounds, sulfydryl chlorothalonil and hydroxychlorothalonil, are realized.

The invention relates to the technical field of polycrystalline silicon system catalysts, in particular to a preparation method of a polycrystalline silicon catalyst for new energy, which comprises the following steps: preparing mesoporous polystyrene microspheres; the preparation method comprises the following steps: dispersing mesoporous polystyrene microspheres in a metal salt solution for precipitation reaction, dispersing the obtained supported polystyrene microspheres in ethanol, then adding stronger ammonia water and tetraethyl orthosilicate for stirring reaction to obtain supported silicon dioxide microspheres; and calcining in a carbon monoxide atmosphere to prepare the polycrystalline silicon system catalyst. According to the preparation method, loading and precipitation of metal salt are carried out by dissolving a large number of mesopores in polystyrene microspheres, then the polystyrene microspheres loaded with metal precipitation particles are fixed by a sol-gel method, and the interior and the surface of the generated silicon dioxide microspheres are mingled with the loaded polystyrene microspheres; and high-temperature reduction calcination is carried out in the atmosphere of carbon monoxide, so that the prepared polycrystalline silicon system catalyst has relatively high tetrachlorosilane conversion rate and long-time use stability.

This invention belongs to the field of biochip technology, specifically an erasable single nucleotide polymorphism (SNP) genotyping chip and its detection method. The erasable SNP genotyping chip provided by this invention is prepared using polystyrene microspheres, capture probes, and a silicon substrate. In the SNP recognition stage, it relies on a FEN1 enzyme-mediated invasive reaction. Based on the technical characteristics of this invasive reaction, downstream probes A and B are designed with self-protective hairpin structures, preventing false positive signals from hybridization with the capture probe even when added in excess, thus significantly improving detection specificity. The detection method of the erasable SNP genotyping chip provided by this invention overcomes the long-standing problem of high application costs caused by the single-use nature of solid-phase SNP gene detection chips.

The invention discloses a magnetic porous microsphere for in-vitro diagnosis and a preparation method of the magnetic porous microsphere, and belongs to the technical field of preparation of micro-nano materials. According to the invention, styrene is used as a polymerization monomer, and a dispersion polymerization method is adopted to prepare monodisperse polystyrene microspheres; ferric chloride and ferrous sulfate are selected as precursors, magnetic nanoparticles are synthesized through a coprecipitation method under the alkaline condition, the initial loading capacity is changed, the magnetic nanoparticles are loaded on the surfaces and in pore channels of polymer porous microspheres through a multi-step seed growth method, and the magnetic nanoparticles are prepared. The composite magnetic polystyrene microspheres with high magnetic content, good magnetic responsiveness and superparamagnetism are synthesized; finally, functional groups are introduced to the surfaces of the magnetic spheres by monomers containing the functional groups through a monomer swelling polymerization method, and the prepared magnetic porous microspheres have the advantages of uniform particle size, small coefficient of variation and large specific surface area, and can be better combined with antigens and antibodies, so that in-vitro diagnostic function detection such as nucleic acid extraction and chemiluminescence is carried out.

The invention belongs to the technical field of microsphere preparation, and particularly relates to a magnetic microsphere and a preparation method thereof. Through cooperation of the cross-linking agent and the monomer, the polystyrene microsphere with good swelling and shrinking performance is provided; in the swelling process, introduced divalent and trivalent iron ions can be coordinated with carboxyl groups of the microspheres and are uniformly dispersed in the microsphere structure; then, by adjusting the pH value, the iron ions react to generate ferroferric oxide distributed in the microspheres and on the surfaces of the microspheres, and in the shrinkage process of the microspheres, the density of aromatic rings is reduced by the ferroferric oxide based on space occupation of the ferroferric oxide, so that background fluorescence is reduced, and the signal-to-noise ratio and sensitivity of fluorescence detection are improved. In addition, ferroferric oxide has an optical shielding effect and can be mutually matched with a coating layer arranged outside the microsphere, so that the fluorescence intensity of the polystyrene material magnetic microsphere is jointly reduced.

The invention relates to the technical field of electronic gas purification, in particular to a silicon-based substituted polystyrene microsphere and a preparation method and application thereof, and the silicon-based substituted polystyrene microsphere comprises a crosslinked polystyrene skeleton; the cross-linked polystyrene skeleton is chemically grafted with a silicon group, and the silicon group is connected with a Si-Cl bond or a Si-Br bond. The silicon-based substituted polystyrene microspheres prepared by adopting an in-situ synthesis method are micron-sized highly-crosslinked solids, are stable in structure and are resistant to acid and alkali, and high-content Si-Cl bonds or Si-Br bonds are introduced into the silicon-based substituted polystyrene microspheres, so that the silicon-based substituted polystyrene microspheres react with water, an excellent water removal effect is achieved, new impurities are not generated, and the method is suitable for industrial production. Separation from electron gas is easy, and energy consumption is effectively reduced.

The invention belongs to the technical field of biochips, and particularly relates to a reusable genetic typing chip and a detection method thereof, the reusable genetic typing chip provided by the invention is prepared from polystyrene microspheres, capture probes and a silicon substrate, and depends on competitive hybridization of DNA in an SNP recognition stage, and the detection result is more accurate. The recognition sequence of the capture probe is converted into the sequence of the target object, and the added detection probes are hairpin probes with a self-protection function, so that the generation of false positive signals is remarkably reduced, and the detection specificity is remarkably improved. And no enzyme participates in the whole process, so that the detection process is remarkably simplified, and the detection cost is reduced.

The invention provides a preparation method of an exosome antibody microsphere conjugate, which belongs to the technical field of exosomes, and comprises the following steps: preparing a carboxyl polystyrene microsphere suspension with the particle size of 50 nanometers, and ensuring that the size of the microsphere is stabilized in a range of 50 + / -5 nanometers by optimizing centrifugation and cross-linking conditions. And then coupling the exosome marker antibody with the microspheres, and closing unreacted active groups. A mathematical model is adopted to optimize purification process parameters for purification. A dynamic light scattering and transmission electron microscope is utilized to characterize coupling physics properties, and a conjugate meeting requirements is screened. And finally, obtaining fluffy porous exosome antibody microsphere conjugate freeze-dried powder under the protection of a sucrose solution by adopting a vacuum freeze-drying method. The method solves the technical problems that in an existing exosome microsphere conjugate preparation process, centrifugation and purification parameters are often set according to artificial experience, optimization is difficult to obtain, and the quality of the exosome microsphere conjugate is affected.

The invention relates to the technical field of immunochromatography, in particular to time-resolved fluorescent microspheres, a preparation method and application of the time-resolved fluorescent microspheres in PSP / CRP / MxA quantitative detection immunochromatography test strip, and the preparation method of the time-resolved fluorescent microspheres comprises the following steps: 1) preparing surface aminated polystyrene microspheres; (2) carrying out glutaraldehyde crosslinking and 1, 10-phenanthroline-5-amino combination; 3) grafting a rare earth fluorescent dye on the surface; and 4) coating a polymer shell layer and modifying carboxyl. According to the invention, through a dual fixation strategy of surface grafting and polymer coating, the time-resolved fluorescent dye is confined to a functional region between the surface of the microsphere and a polymer shell layer, diffusion and leakage of dye molecules to the external environment are blocked, and the problem of dye shedding of traditional fluorescent microspheres is solved; the polymer shell layer can effectively isolate external ultraviolet light, oxygen and other corrosive factors, reduce photooxidative degradation and non-radiative transition loss of fluorescent molecules, and improve the light stability and fluorescent lifetime of the fluorescent molecules.

The invention relates to the technical field of lithium batteries, in particular to a preparation method of a positive plate and a battery comprising the positive plate. The invention discloses a positive plate preparation method and a battery comprising the positive plate, and the positive plate preparation method comprises the following steps: firstly, pre-mixing a pretreated NCM811 positive plate material, a composite conductive agent composed of super conductive carbon black and the like, and hydroxyl-containing modified polyvinylidene fluoride in proportion, adding polystyrene microspheres to prepare a slurry, coating a modified aluminum foil with the slurry, and carrying out vacuum drying to obtain a positive plate; performing segmented drying, gradient rolling and the like to obtain a positive plate; and finally, winding, packaging and injecting liquid according to the sequence of the positive plate, the diaphragm treated by dopamine and the negative plate, standing and forming to obtain the battery, and mainly improving the performances of conductivity, interface stability, low-temperature discharge and the like.

The invention discloses a preparation method of a composite phase change material, a thermal-insulation and antibacterial fabric and a preparation method thereof, and belongs to the field of functional textile fabrics and preparation thereof. The composite phase change material provided by the invention can be applied as a coating finishing component, and the preparation method comprises the following steps: taking polystyrene microspheres as a core, and forming a composite precursor through dopamine self-polymerization coating; and compounding the composite precursor with a layered double-metal hydroxide, and calcining to obtain the carbon microsphere supported layered double-metal oxide material with a hollow structure, and mixing the carbon microsphere supported layered bimetal oxide material with paraffin, and loading to obtain the carbon microsphere supported layered bimetal oxide material. The textile fiber fabric provided by the invention has excellent thermal insulation and antibacterial characteristics, is good in comfort, and has wide application prospects in industrial production and clothing application.

The invention relates to heat-insulating composite aerogel as well as a preparation method and application thereof. The heat-insulating aerogel comprises a framework silicon dioxide nanofiber, and a network interpenetrating porous structure formed by interweaving cellulose nanofiber and silicon dioxide nanofiber. Specific surface functionalization treatment is adopted to promote the interfacial compatibility between SiO2-NF and TOCNF, nano polystyrene microspheres are added, and finally annealing treatment is performed to precisely regulate and control the pores of the aerogel, so that uniform dispersion and network interpenetration of the aerogel in the nanoscale are realized; and the porous structure of the obtained composite network is effectively maintained by using a freeze-drying technology. The final product shows ultralow thermal conductivity, excellent lightweight characteristic and mechanical properties of rigidity and softness. The process is controllable, the raw materials can be selected from biomass, and the obtained aerogel has important application value in the fields of building energy-saving enclosure, aerospace thermal protection and the like.

The invention relates to the technical field of in-vitro diagnostic kits, in particular to hollow porous monodisperse carboxyl polystyrene microspheres, a preparation method and application of the hollow porous monodisperse carboxyl polystyrene microspheres in a kit for quantitatively detecting MxA. The preparation method of the microspheres comprises the steps that firstly, hydrophilic polystyrene microspheres are prepared to serve as stable particles; then fully mixing the Pickering particles with a first oil phase to form Pickering stable particles; then a surfactant and a second oil phase are added, the mixed system is stirred at a high speed, and the second oil phase permeates into the surfaces or pores of Pickering stable particles through interface interaction and molecular diffusion; under the action of an initiator, the polymeric monomers are subjected to a polymerization reaction, the low-boiling-point organic solvent is evaporated out along with temperature rise, and a polymer with a core part of a hollow structure and a shell layer of a porous structure is formed; and adding a carboxyl-containing functional monomer to form a hydrophilic polymer chain on the surface of the polymer, thereby finally obtaining the hollow porous monodisperse carboxyl polystyrene microspheres.

The invention discloses a silver-based electromagnetic shielding coating layer and a preparation method thereof, and belongs to the technical field of electromagnetic shielding materials. The coating layer comprises the following components in parts by mass: 30-50 parts of composite modified polystyrene silver-loaded microspheres, 80-150 parts of epoxy resin, 15-40 parts of a polyether amine epoxy curing agent, 0.5-2 parts of a defoaming agent and 0.5-2 parts of a flatting agent, and the coating layer is obtained by mixing all the components, coating the insulating carrier with the mixture and curing. The composite modified polystyrene silver-loaded microspheres are prepared by modifying sulfhydrylated polystyrene microspheres with trimethylpropane monoallyl ester, modifying with histidine, quaternizing, loading with phosphotungstic heteropoly acid and carrying out reduction loading with silver ions. The phosphotungstic heteropoly acid anchors silver ions to form a uniform and compact silver layer, and the silver-loaded microspheres form a three-dimensional conductive network to ensure the shielding effectiveness; the organic modified layer and the epoxy resin matrix form strong interface combination to avoid agglomeration and sedimentation; the oxidation resistance is improved through a multi-barrier structure, the quaternary ammonium salt has the antibacterial property, and high conductivity, excellent oxidation resistance, good matrix compatibility and shielding stability are achieved.

The invention relates to the technical field of micro-fluidic chips, and discloses a multi-fluid effect synergistic three-dimensional single-row focusing micro-fluidic chip and a method for single-line focusing of polystyrene microspheres by using the micro-fluidic chip, the micro-fluidic chip comprises a sample liquid inlet, one end of the sample liquid inlet is provided with an inertia focusing link, and the other end of the sample liquid inlet is provided with an inertia focusing link; a tapered flow guide cone structure is arranged between the inertial focusing link and the sample liquid inlet and is used for inhibiting the initial dispersion and diffusion trend of particles at the sample liquid inlet; the bionic gradient height structure is positioned at one end, far away from the tapered flow guide cone structure, of the inertial focusing link and is used for focusing and compressing the particles in the vertical direction; a sheath fluid focusing area is arranged at one end, far away from the inertial focusing link, of the bionic gradient height structure, and a sheath fluid inlet and a chip mixed liquid outlet are sequentially formed in one end, far away from the bionic gradient height structure, of the sheath fluid focusing area. According to the invention, efficient three-dimensional centered arrangement is realized, dynamic convergence of a particle trajectory from a dispersion state to a central single beam is realized, and a digital focusing regulation capability is realized.

The present invention discloses an additive manufacturing method for a laser window with a micro-nano structure and a laser window. The steps include: 1) ultrasonically cleaning the polished quartz glass with a chemical reagent; (2) self-assembling polystyrene microspheres using a micro-injection pump and transferring them onto the ultrasonically cleaned quartz glass; (3) reducing the diameter of the polystyrene microspheres using an ion beam assisted coating technique and then coating a silica material thereon; (4) cleaning the quartz substrate with a chemical reagent to wash away the polystyrene microspheres with a part of silica; (5) performing secondary ion beam assisted coating on the cleaned quartz substrate. The laser window with a micro-nano structure prepared by this method has a high transmittance, a wide anti-reflection band, and strong laser damage resistance.

The invention discloses a preparation method and application of high-sensitivity and high-stability time-resolved fluorescent microspheres, and relates to the technical field of immunochromatography. The preparation method comprises the following steps: (1) preparing high-stability high-carboxyl-density polystyrene microspheres; (2) preparing a high-stability europium ion chelate; and (3) preparing the high-stability fluorescent microspheres. Through a strategy of combining functional monomer copolymerization and surface covalent labeling, the fluorescent microspheres which are connected through strong covalent bonds from inside to outside and are high in stability and carboxyl density are constructed; obvious differential advantages and innovativeness are shown in the aspects of chemical stability, anti-leakage capability of fluorescent markers and surface functional group density. A time-resolved fluorescent microsphere test strip developed based on the microspheres has the advantages of good stability, high detection sensitivity and the like, and can realize rapid detection and analysis of a substance to be detected.

The invention relates to the field of preparation of calcium silicate veneers, in particular to a high-performance calcium silicate building veneer and a preparation method thereof. The invention provides a compact calcium silicate veneer with a multi-layer composite structure, which is formed by adding chemical raw materials with different components in a layered manner. The used innovative sound insulation material is a microporous calcium silicate-serpentine fiber-polystyrene composite material. By adding polystyrene microspheres and serpentine fibers in a specific proportion into calcium silicate, a porous structure with an excellent sound absorption effect is formed. The material not only has remarkable sound insulation performance, but also can effectively improve the waterproofness and weather resistance of the board and prolong the service life of the board.

The invention provides a method for preparing micron-sized polystyrene microspheres by an improved dispersion polymerization method. The method provides three large-size microsphere preparation regulation strategies: 1) a regulator adding strategy: particle size control is realized by regulating the solubility of an initial long chain of polystyrene; 2) a dynamic solvent concentration control strategy, wherein the growth of the microspheres is influenced by adjusting the dynamic concentration of styrene in the system; and 3) an oxygen introduction strategy, wherein the final particle size is regulated by controlling the number of primary nuclei. The method has the characteristics of simple process and good repeatability, and the particle diameter of the prepared polystyrene microspheres is gt; and after multiple times of washing, precipitation and separation, the coefficient of variation (Cv) is less than 5%.

The application discloses an aggregation-induced emission microsphere with colorimetric-fluorescent double signals and a preparation method and application thereof. The aggregation-induced emission microsphere comprises carboxyl polystyrene microspheres and aggregation-induced emission dyes embedded in the carboxyl polystyrene microspheres; and the structural formula of the aggregation-induced emission dyes is as follows: The aggregation-induced emission microsphere has colorimetric-fluorescent double signals, is red under natural light, has strong absorption at 600 nm, and shows high light-emitting efficiency at 725 nm, effectively avoids the interference of biological autofluorescence, reduces background interference, has good light stability and light bleaching resistance, and has high molar extinction coefficient, so that the aggregation-induced emission microsphere has colorimetric and fluorescent double signal output capabilities. In addition, the preparation process of the aggregation-induced emission microsphere has high reproducibility, has the potential for large-scale synthesis, and meets the needs of industrial batch production.