25 results about "Polystyrene microsphere" patented technology

The application relates to the field of sewage treatment, and discloses a sulfur autotrophic denitrification biofilter composite filler and a preparation method thereof. The method comprises the following steps: carrying out a silane hydrolysis reaction on a silane coupling agent containing a mercaptan group to prepare a hydrolysis solution, and then adding hydroxylated polystyrene microspheres into the hydrolysis solution to carry out a grafting reaction and prepare the sulfur autotrophic denitrification biofilter composite filler. The method grafts mercaptan groups to the surface of the polystyrene microspheres by using the silane coupling agent containing the mercaptan group. The mercaptan groups can specifically combine with sulfur transport proteins on the cell membrane of sulfur autotrophic denitrification microorganisms, so that the sulfur autotrophic denitrification microorganisms can selectively colonize on the surface of the polystyrene microspheres, competition between other microorganisms and the sulfur autotrophic microorganisms can be avoided, the colonization stability of the sulfur autotrophic microorganisms is improved, and the biofilm formation efficiency is improved.

The application relates to the technical field of adsorbing silica gel, and discloses a preparation method of high-porosity adsorbing silica gel. In the application, styrene, acrylic acid and a modified crosslinking agent are polymerized to obtain modified polystyrene microspheres; the silicon hydroxyl generated by hydrolysis of triethoxysilyl in a silane coupling agent type quaternary phosphonium salt and the carboxyl on the surface of the modified polystyrene microspheres are subjected to a dehydration condensation reaction to obtain quaternary phosphonium salt grafted modified polystyrene microspheres; the quaternary phosphonium salt grafted modified polystyrene microspheres are used as sacrificial space-occupying templates; and a sol-gel process is combined to synchronously construct a double-stage hierarchical pore structure, so that the porosity of the adsorbing silica gel is improved.

This invention discloses a cation-cavity-dynamic covalent nanonetwork functional synergistic microring, its preparation method, and its application, belonging to the field of biomedical materials. The microring has an anisotropic ring structure with a positively charged inner wall and an environmentally responsive polyphenolic dynamic covalent nanonetwork grafted onto the outer wall. The inner wall enables electrostatic capture and physical confinement of bacteria, while the outer wall enables broad-spectrum adhesion and antibacterial effects, synergistically achieving integrated functions of capture, antibacterial, and anti-inflammatory. The preparation method uses polystyrene (PS) microspheres as seeds to obtain a Patchy template, which is then coated with silica, amino-functionalized, grafted with a dynamic covalent nanonetwork, and the template is removed and purified to obtain the target microring. The process is mild, the structure is uniform, and the biocompatibility is excellent. The microring of this invention has high capture and bactericidal efficiency against common clinical pathogens and significant antioxidant and anti-inflammatory effects. It can be used in the research and development of drugs for the treatment of bacterial infection-related inflammatory diseases, providing a novel carrier and technical direction for antibacterial and anti-infective biomedical materials.

The application discloses a kind of spherical porous silicon-carbon composite material and its preparation method and application, belong to lithium ion battery material preparation technical field.The preparation method of the spherical porous silicon-carbon composite material includes: polystyrene microsphere is added to resin solution, and adding scandium-metal organic framework composite material is uniformly dispersed, carbonization is carried out after drying at 700-900 DEG C, 1050-1250 DEG C steam activation, obtain porous carbon material, then transfer to fluidized bed, and heated to 400-600 DEG C, pass into silane mixed gas, under negative pressure condition deposition 30-300 min, pass into heteroatom gas passivation, deposition amorphous carbon by vapor deposition method, obtain silicon-carbon composite material.The application utilizes internal doping scandium to improve the specific capacity of material and the porous structure formed after carbonization of metal framework to improve the compressive strength of material, reduce expansion, improve cycle performance.

The application provides a monodisperse functionalized polymer magnetic composite microsphere and belongs to the technical field of magnetic materials. The monodisperse polystyrene microsphere is prepared by using a dispersion polymerization method, a two-step swelling method is used to obtain porous crosslinked polystyrene microspheres, then the porous crosslinked polystyrene microspheres are mixed with sulfuric acid to obtain porous polystyrene microspheres containing sulfonic acid groups on the surface, then the in-situ precipitation method is used to combine with ferrous ions, in an alkaline environment, the magnetic porous polystyrene microspheres are obtained, finally in acetonitrile solvent, various functional monomers are added to obtain the monodisperse functionalized magnetic composite microspheres which have good suspension performance and fast magnetic attraction rate.

The application discloses a preparation method of a layered structure silicon oxide film, and belongs to the technical field of deep processing of glass thin film. First, monodisperse polystyrene microsphere emulsion is used as raw material, and 2-5 layers of ordered colloid crystal templates are prepared on a substrate through a doctor blade method. Then, tetraethyl orthosilicate is used as a precursor, hydrolysis and condensation are carried out under catalysis of a specific acid-base sequence, and an SiO2 coating sol is prepared by combining an anionic surfactant as a soft template. Finally, the sol is used as a coating liquid, the above template is used as the substrate, and a film is formed by adopting a spin coating or a pulling method, the template is removed through drying and heat treatment at 400-600 DEG C, and a silicon oxide film with a layered, through and multi-level pore structure is obtained. The method is simple and controllable, the prepared film has the characteristics of low refractive index and high optical transmittance, and has important application prospects in the field of solar photovoltaic cells.

The application discloses a solid phase carrier for primer synthesis and a preparation method thereof, and belongs to the technical field of polymer microspheres, and the preparation method comprises the following steps: in the first step, a double-end epoxy silane and diethylenetriamine are added into isopropyl alcohol, and stirring reaction is carried out; after the reaction is completed, vacuum distillation is carried out to obtain an end-amino hyperbranched polymer; in the second step, chloromethylated polystyrene microspheres are added into toluene to be swelled, then the end-amino hyperbranched polymer is added to carry out stirring reaction, after the reaction is completed, ethanol extraction is carried out, and vacuum drying is carried out to obtain the solid phase carrier. According to the method, the end-amino hyperbranched polymer is grafted on the surface of the polystyrene microspheres to form the solid phase carrier, the method is controllable, the loading capacity is high, the universality is good, the stability is strong, the existing industrial conventional equipment can be directly used for large-scale and batch production, and the reproducibility is strong.

The application relates to a method for preparing a self-assembled double-layer light extraction micro-nano structure quantum dot light-emitting device. A hole injection layer, a hole transport layer and a quantum dot film, an electron transport layer, a metal cathode and an ITO layer back of a conductive substrate are sequentially deposited on an ITO layer of a transparent conductive substrate to prepare a light extraction micro-nano structure in a self-assembled manner; the light extraction micro-nano structure prepared in the self-assembled manner is operated as follows: (1) a dense and ordered micro-nano structure is formed through a polystyrene microsphere (PS ball) self-assembled technology; (2) the PS ball after self-assembly is transferred to a polyvinyl butyral (PVB) film on the back of the substrate through a fishing method; (3) a flat silicon wafer is placed on the PS ball micro-nano structure to exert a certain pressure, so that the PS ball can be embedded in the PVB film. The application forms a dense and ordered PS ball array through a self-assembled process, and the PS array and the PVB form a closely adhered double-layer micro-nano structure through pressure exertion, so that the light extraction efficiency of the quantum dot light-emitting device is strengthened.

This invention provides a silver nanoparticle-modified PS sphere-silver sphere cavity composite structure SERS substrate, its preparation method, and its application, belonging to the field of Raman spectroscopy detection technology. The method uses a polystyrene (PS) microsphere array as a template, combining tilted rotational evaporation and physical flipping processes to construct a 3D silver nanoparticle array structure. Under unwashed conditions, silver layers of different thicknesses (10~80 nm) are vertically evaporated onto the exposed surface of the PS microspheres, allowing silver nanoparticles to grow directly on the PS microsphere surface, forming a multi-level composite structure of "silver nanoparticle-silver sphere cavity". The substrate with a vertically evaporated 20 nm silver layer exhibits the best SERS enhancement performance, with a detection limit as low as 10 for crystal violet (CV). ‑11 M, the relative standard deviation (RSD) of 50 random test points is 7.42%.

The application discloses a method for improving the stability of freeze-dried fluorescent microsphere-labeled antibody, which comprises the following steps: S1, mixing polystyrene microsphere solution containing fluorescent dye, EDC solution and NHS solution to perform activation reaction, and obtaining activated microsphere solution; S2, adding antibody solution into the activated microsphere solution to perform coupling reaction, and obtaining coupling reaction liquid; S3, adding microsphere blocking solution into the coupling reaction liquid to perform blocking reaction, then performing centrifugation to remove supernatant, then adding microsphere washing solution to perform cleaning, then performing centrifugation to remove supernatant, and obtaining blocked microspheres; and S4, adding microsphere storage solution into the blocked microspheres, and uniformly mixing by ultrasonic to obtain microsphere storage solution, which is stored at 2-8 DEG C in dark for standby use. The microsphere storage solution composite formula developed by the application can effectively prevent the destruction of antibody structure in the freeze-drying process, meanwhile, the stability of fluorescein is maintained, the activity retention rate of the antibody and the fluorescence intensity are significantly improved, and the shelf life of the product is prolonged.

The application discloses a gold film-space engineering array integrated microfluidic chip and a preparation method and application thereof, and belongs to the technical field of microfluidic detection, and comprises a microfluidic channel, wherein the microfluidic channel comprises a sample inlet area, a detection area and a sample outlet area, the detection area is provided with a plurality of parallel detection chips; the detection chip is a gold film-space engineering arrayed SERS substrate which is modified with probe molecules; the gold film-space engineering arrayed SERS substrate comprises a polystyrene compound eye array structure layer, a nano-gold film layer and a nano-gold ball layer which are arranged from bottom to top; the polystyrene compound eye array structure layer is a monolayer film which is composed of polystyrene microspheres, and a plurality of non-overlapping pits are distributed on each polystyrene microsphere. The gold film-space engineering array integrated microfluidic chip can significantly improve the efficiency and sensitivity of analysis and detection.

This invention discloses a zinc anode, its preparation method, and a battery, belonging to the field of electrochemical technology. It solves the problem of reduced coulombic efficiency and reduced cycle life in existing batteries using zinc-based metal anodes. A zinc anode includes a zinc substrate and a composite modification layer coated on the surface of the zinc substrate; the composite modification layer is formed by combining polystyrene microspheres and an ionic liquid, and the thickness of the composite modification layer is 5-30 μm. The composite modification layer on the zinc anode of this invention does not significantly hinder Zn²⁺ deposition. + The transmission of electrons can maintain the electron conversion reaction in the strong acid electrolyte, enabling the battery system to achieve excellent cycle stability while maintaining high voltage output. The acidic aqueous zinc-manganese full cell constructed with zinc anode prepared using this composite modification layer still maintains stable rate performance at high current density.

This invention belongs to the field of materials technology and discloses a polystyrene microsphere / chitosan composite film loaded with hydrophobic substances and its electrodeposition preparation method. First, a polystyrene microsphere emulsion loaded with hydrophobic substances is prepared by combining a compound emulsifier, styrene, water, hydrophobic substances, and azobisisobutyronitrile (AIBN). Then, chitosan is dissolved in an aqueous acetic acid solution to prepare a chitosan solution. The two solutions are then mixed, and sodium chloride solution and hydrogen peroxide are added to prepare an electrodeposition solution. Finally, using Pt as the anode and ITO as the cathode, the polystyrene microsphere / chitosan composite film loaded with hydrophobic substances is obtained by electrodeposition. This invention utilizes polystyrene microspheres as a carrier for hydrophobic substances, co-depositing them with chitosan to form a composite film. The hydrophobic substances in this composite film can remain stable for a long time and retain their original color development and catalytic properties, thus showing good application prospects in coatings, catalysis, and other fields.

The application relates to a glycosylated hemoglobin HbA1c freeze-drying detection reagent and a preparation method and application thereof, the preparation method comprising the following steps: preparing surface-aminoated polystyrene microspheres through an emulsion polymerization method, then introducing double bonds through a Schiff base reaction with methyl acrolein, and then preparing anion polystyrene microspheres with hydrophilic chains through free radical polymerization, preparing HbA1c detection reagent R1 freeze-dried powder by using the anion polystyrene microspheres; preparing a hydrophilic crosslinking agent 2,5-bis(2,4-dihydroxy-6-formyl phenoxy) p-phenylenedimethylene, and then preparing HbA1c oligomers by a Schiff base reaction with HbA1c mAb, and preparing HbA1c detection reagent R2 freeze-dried powder by using the HbA1c oligomers. The glycosylated hemoglobin HbA1c freeze-drying detection reagent prepared by the application has high antigen binding efficiency, excellent detection sensitivity, sufficient antibody activity reservation and strong detection specificity.

This invention belongs to the field of gas sensing materials technology, and discloses a SnO2 / NiO three-dimensional photonic crystal gas-sensitive material based on a polystyrene (PS) microsphere template, its preparation method, and its application. The method includes: pre-treating a glass slide by ultrasonic and solvent cleaning; adding a PS microsphere dispersion to its surface and drying it to form a template layer; preparing a precursor solution by dissolving SnCl2·2H2O and NiCl2·6H2O in ethanol at a predetermined molar ratio; adding the precursor solution to the surface of the PS microsphere template layer and drying it to form a precursor composite layer; calcining at 300–800 °C to remove the template and form a SnO2 / NiO three-dimensional photonic crystal structure; and using the obtained material as a sensitive layer to construct a gas-sensitive element for acetone gas detection. By controlling the molar ratio of Sn to Ni, the gas response / recovery time is effectively shortened, with a Sn:Ni ratio of 3:1 exhibiting superior response kinetics performance. Gas-sensitive testing results show that the SnO2 / NiO three-dimensional photonic crystal composite material with a Sn:Ni molar ratio of 3:1 exhibits a response value of 9.60 and a response time of 176 s to 100 ppm acetone, while the pure SnO2 sample shows a response value of 7.84 and a response time of 207 s. Both the response value and response speed are significantly improved. This material combines a three-dimensional ordered porous structure with the synergistic effect of a p-n heterojunction, which can significantly improve gas diffusion efficiency and interfacial charge transport capability, demonstrating excellent selectivity and concentration response characteristics, making it suitable for the rapid detection of acetone gas.

This invention belongs to the field of polystyrene preparation technology. This invention provides highly dispersible polystyrene microspheres and their preparation method. The method comprises the following steps: S1, adding 20 parts by weight of styrene, 76-78 parts by weight of methanol, 1.7-1.8 parts by weight of polyvinylpyrrolidone, 1-1.2 parts by weight of azobisisobutyronitrile, 0.4-0.5 parts by weight of stearic acid-modified calcium sulfate whiskers, and 0.7-0.8 parts by weight of amphiphilic block copolymer-modified carbon nanotubes to a flask, stirring and dispersing, then heating to 70±2℃ and reacting at a constant temperature to obtain an emulsion; S2, centrifuging, washing, and drying the emulsion obtained in S1 with methanol to obtain the highly dispersible polystyrene microspheres. This invention improves the conversion rate of polystyrene microspheres and further optimizes their monodispersity by increasing the amount of the stabilizer polyvinylpyrrolidone.

1. Name of the product in this design: Glass bottle (containing polystyrene microsphere solution). 2. Purpose of this design: For storing and containing polystyrene microsphere solutions. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention provides a freeze-resistant and moisture-retaining conductive hydrogel sensor and its preparation method. The hydrogel sensor is prepared by room-temperature free radical polymerization of acrylic monomer, ferric salt, sulfonated polymer microspheres, lithium salt, glycerol, a redox initiation system, and deionized water. The polymer microspheres are polystyrene microspheres or styrene copolymer microspheres. The ferric salt is preferably ferric chloride hexahydrate, the lithium salt is preferably lithium chloride, and the redox initiation system is preferably an ammonium persulfate / sodium sulfite system. This invention significantly improves the conductivity, mechanical properties, and low-temperature freeze-resistant properties of the hydrogel by introducing sulfonated polymer microspheres, ferric salt, and lithium salt into the polyacrylic acid hydrogel system and combining them with a glycerol antifreeze system to construct a composite structure with ion conduction channels and a dynamic ion crosslinking network.

This invention relates to the field of biology, and particularly to a ligand-coupled microsphere for measuring inverse-locking levels, its preparation method, and a method for measuring inverse-locking levels. The ligand-coupled microsphere comprises a ligand coupled with a first label, a DNA fragment, and a polystyrene microsphere. A second label is coupled to one end of the DNA fragment, and the second label specifically binds to the first label. Digoxigenin is coupled to the other end of the DNA fragment. An anti-digoxigenin antibody is coupled to the surface of the polystyrene microsphere, and the polystyrene microsphere is linked to the DNA fragment via the anti-digoxigenin antibody and digoxigenin. The measurement method of this invention can measure different receptor-ligand interactions and enables its application in commercial instruments, forming a more universal inverse-locking measurement method. This allows inverse-locking measurements to be applied in more situations, providing theoretical support for the engineering modification of various receptors such as TCR, and providing data support for clinical applications.

This invention relates to the field of food detection technology, disclosing a hollow bimetallic palladium / platinum nanozyme, its preparation method, and its applications. This invention utilizes the excellent surface area, stability, uniformity, and accessibility of polystyrene microspheres, as well as the advantages of the three-dimensional structure of the microspheres providing a larger surface area than traditional two-dimensional carriers, which is beneficial for catalytic reactions. A three-dimensional hollow bimetallic Pd / Pt nanozyme was designed and synthesized. This nanomaterial exhibits significantly enhanced peroxidase-like catalytic activity and can be used for hydrogen peroxide detection. This invention also provides a colorimetric method for the enzyme-like properties of hydrogen peroxide based on hollow palladium / platinum nanozymes. This method is simple to operate, low in cost, and provides visualized and intuitive detection results, showing broad application prospects in the fields of food, environmental monitoring, and bioanalysis.

The application belongs to the technical field of catalysts, and discloses a sulfur-tolerant ultra-low-temperature nitrogen oxide reduction catalyst. A preparation method of the catalyst comprises the following steps: adding TiOSO4 into deionized water, a nitric acid solution, polystyrene microspheres, and adjusting pH to obtain a second suspension; filtering and drying the second suspension to obtain dried precipitate; placing the dried precipitate in a nitrogen atmosphere for calcination treatment to obtain a macroporous TiO2 carrier; adding the macroporous TiO2 carrier into deionized water, adding tin tetrachloride and ferrous sulfate to obtain a first suspension; adding ammonia water into the first suspension, adjusting the pH value of the first suspension, filtering, and drying to obtain dried precipitate; and calcining the dried precipitate to obtain the final catalyst. The catalyst prepared by the application can effectively improve the catalytic efficiency of the catalyst in an ultra-low-temperature environment and can maintain stability during long-term operation.

The application provides a porous basic copper nitrate and a preparation method and application thereof. The preparation method of the porous basic copper nitrate comprises the following steps: taking styrene as a monomer, obtaining polystyrene microspheres with a uniform and compact packing structure through an emulsion synthesis method and continuous slow centrifugation, adding the polystyrene microspheres into a copper nitrate solution containing a dispersant, performing vacuum treatment under normal temperature conditions, obtaining a precursor filled with copper ions after centrifugal separation, dispersing the precursor in water, introducing ammonia gas to perform an in-situ precipitation reaction under stirring, obtaining polystyrene microspheres filled with basic copper nitrate after filtration, removing a template through organic solvent washing, and obtaining the porous basic copper nitrate after drying treatment. The application uses the uniform and compact PS ball as a template, combines with an ammonia gas precipitation method, realizes limited growth of the basic copper nitrate under mild conditions, and thus constructs an ordered porous structure. The prepared porous basic copper nitrate has the advantages of high purity, good flowability, uniform particles, large specific surface area and good combustion performance.

This invention provides an aluminum-doped silicon carbide-based special ceramic composite material, its preparation method, chassis, and semiconductor device, belonging to the technical field of silicon carbide composite materials. This application synthesizes a polymer precursor with aluminum, silicon, and carbon elements uniformly distributed at the molecular level. Subsequently, this precursor is mixed with polystyrene microspheres as a sacrificial template, and subjected to stepwise heat treatment. At low temperature, the mixture crosslinks and solidifies, decomposing the template to form pores. At high temperature, it crystallizes into a porous silicon carbide framework uniformly doped with aluminum atoms. Then, molten aluminum-silicon alloy is filled into the framework using a vacuum infiltration method. During infiltration, the liquid aluminum-silicon alloy reacts with residual carbon on the framework surface at the interface, forming an interface region containing Al, Si, and C elements between the metal and ceramic phases, improving the interfacial bonding between the metal and ceramic. The resulting bicontinuous interpenetrating network structure effectively combines the hardness of ceramics with the toughness and high conductivity of metals.