21 results about "Polystyrene spheres" patented technology

The application discloses a single-particle layer metal organic framework mixed matrix nanometer porous membrane and a preparation method thereof, and belongs to the field of functional materials and membrane separation technology. The preparation method comprises the following steps: firstly, synthesizing MOF nanoparticles; then, self-assembling the MOF particles and polystyrene balls on the water surface; after treatment, obtaining a MOF single-particle layer; finally, adding a proper amount of a polymer binder to fill the gaps between the MOF particles, so that a single-particle layer MOF mixed matrix nanometer porous membrane is obtained. The single-particle layer MOF mixed matrix nanometer porous membrane prepared by the preparation method is composed of a single-particle layer, has an ultrathin thickness and high strength, and the transmembrane transport of substances in the membrane only needs to pass through a single MOF particle, so that the nanometer porous structure of the MOF particle can be used to the maximum extent, the negative influence of polymer blockage and grain boundary between particles on the substance transport of the nanometer porous membrane is avoided, and the single-particle layer MOF mixed matrix nanometer porous membrane has high selectivity and high permeability.

The present invention discloses an eggshell-type magnesia-aluminum spinel hollow sphere and a preparation method thereof; after electrofused magnesia, activated alumina powder and an additive are ball-milled and premixed, using polystyrene spheres as spherical supports, phenolic resin solution is added, and according to the concentration of the phenolic resin solution and the stirring speed, the thickness of the resin layer on the surface of the polystyrene spheres is jointly controlled. By controlling the particle size of the ball-milled premix, the thickness of the shell layer is controlled; it is formed and sieved in a granulator, and then through steps such as drying and heat treatment, magnesia-aluminum spinel hollow spheres are synthesized at low temperature. The present invention uses inexpensive and easily obtainable raw materials, has the characteristics of low cost and simple preparation process, and the prepared magnesia-aluminum spinel hollow spheres have excellent high-temperature resistance.

The application belongs to the technical field of refractory materials, and discloses a multi-scale pore carbon-based microsphere and a preparation method thereof. The application prepares a premix by grinding walnut shell powder, aluminum powder and an additive into fine powder, takes polystyrene balls as spherical supports, adds a silica sol solution, and forms a shape in a granulator and sieves. After drying, heat treatment and other steps, a multi-scale pore carbon-based microsphere is synthesized at low temperature. In the carbon skeleton hole formed by the walnut shell powder, a Sialon-SiC composite ceramic phase is generated in situ, filling part of the pores, so that pores of different scales are formed. The application uses cheap and easily available raw materials, has the characteristics of low cost and simple preparation process, and the prepared multi-scale pore carbon microsphere has excellent high-temperature resistance.

The present invention discloses a hierarchical porous honeycomb microsphere composite material suitable for preparing a negative electrode of a lithium-ion battery, assembled with in-situ grown carbon nanosheets of MoS2 nanocrystals, and its preparation method and application. The mass percentage of MoS2 in the material is 30%-60%, and the MoS2 nanocrystals are embedded in the carbon nanosheets. 2-7 carbon nanosheets are stacked and entangled to form a hollow sphere unit with a diameter of 100-500nm and a spherical hollow hole. Multiple hollow sphere units are densely assembled into a large microsphere, forming a honeycomb sphere structure with a diameter of 2-6μm. The preparation method comprises: adjusting the pH of a suspension of monodisperse polystyrene spheres with a diameter of 100-300nm to 1-3, adding dopamine hydrochloride and mixing, and then adding sodium molybdate. After fully stirring the reaction, the solid is washed and dried, calcined at 400-500℃ in an argon atmosphere, and vapor-phase vulcanized to obtain a hierarchical porous honeycomb microsphere composite material assembled with in-situ grown carbon nanosheets of MoS2 nanocrystals.

This invention discloses a method for preparing single-pore hollow silicon spheres. Using positively charged polystyrene spheres as templates, the method employs electrostatic spray granulation to coat the polystyrene surface with a layer of silica sol. The core is then removed by calcination, resulting in hollow silicon spheres. Because the polystyrene spheres are positively charged, during electrostatic spray granulation, the silicon shell is repelled to one side by a positive electric field of the same charge. Finally, calcination yields single-pore hollow silicon spheres. These spheres can effectively carry functional substances such as fragrances, drugs, and catalysts into their internal space for sustained release, while maintaining good structural strength, thus showing promising practical applications. Furthermore, the preparation method of this invention is simple, allows for mass production, and is beneficial for industrial production and application.

The utility model discloses a core-shell type sewage treatment filter material, which comprises an inner core ball core body and an outer shell layer, the inner core ball core body is arranged inside the outer shell layer, the outer shell layer comprises a first outer shell layer and a second outer shell layer, the outer side of the inner core ball core body is coated with the first outer shell layer, and the second outer shell layer is of a rod-shaped structure arranged in an array. According to the utility model, a filter material structure with a firm inner core and a hydrophilic outer layer is formed, i.e., the polyvinyl alcohol layer and the iron oxide material layer are coated on the periphery of the polystyrene ball core body, the filter material has a larger specific surface area, and the hydrophilic iron oxide and polyvinyl alcohol of the shell layer can reduce the surface affinity; the biological interception area of the filter material is further increased due to the uniformly distributed and arranged iron oxides, and the outer active material layer is not easy to fall off and has stable and long-acting hydrophilicity and biocompatibility, so that the biofilm formation speed and biofilm formation amount of the surface of the filter material are effectively increased, the removal rate of pollutants is increased, and the biological treatment cost is reduced.

This invention discloses a composite macroporous adsorption resin sphere and its preparation method, comprising activated carbon spheres, wherein the activated carbon spheres have a metal oxide catalyst loaded on their outer surface, and the outer surface of the activated carbon spheres is constructed with a highly cross-linked macroporous adsorption resin layer. Beneficial effects: Using activated carbon spheres loaded with metal oxide catalysts as the core, low-crosslinked polystyrene spheres are constructed on the surface of the activated carbon spheres through multiple suspension polymerization methods. Finally, a styrene-divinyl composite sphere is formed using a swelling method and a post-crosslinking process. This composite sphere not only possesses the advantages of highly cross-linked macroporous resins—porous structure, high strength, and high adsorption performance—but also exhibits the characteristics of electrocatalytic oxidation of three-dimensional electrode particles. Under electrocatalytic oxidation, the strong oxidizing substances generated on the surface of the activated carbon particles, which act as three-dimensional electrode particles, have the highest concentration at the contact surface between the activated carbon and the resin. In particular, the generated hydroxyl radicals can directly oxidize organic matter adsorbed deep within the resin pores.

The application provides a method for detecting XFEL wavefront by using aerosol, and relates to the field of XFEL wavefront detection.The method for detecting XFEL wavefront by using aerosol comprises the following steps: step 1) atomizing polystyrene ball solution and injecting the polystyrene ball solution into the focus of XFEL; step 2) obtaining a plurality of diffraction images of the polystyrene balls; step 3) obtaining the wavefront tilt angle of each diffraction image, and obtaining the wavefront tilt distribution of the XFEL pulse according to the wavefront tilt angle; step 4) obtaining the diffraction intensity of each diffraction image, and obtaining the intensity distribution of the XFEL pulse according to the diffraction intensity; and step 5) combining the wavefront tilt distribution of the XFEL pulse and the intensity distribution of the XFEL pulse to obtain the joint distribution of the wavefront tilt and the intensity of the XFEL pulse.The application can sensitively detect the wavefront tilt and the intensity distribution of the XFEL pulse under high peak intensity.

The application belongs to the technical field of Raman spectrum detection, and discloses an Ag / Ag2O / Ag nanosphere array SERS substrate, a preparation method and application. Polystyrene (PS) spheres are self-assembled and arranged in a hexagonal close-packed manner on a silicon wafer, silver is evaporated, exposed to air to naturally oxidize to form an oxide layer, silver is evaporated again to form a uniform three-layer nanosphere array, and an Ag / Ag2O / Ag nanosphere array SERS substrate is obtained. By controlling the deposition thickness of the silver layer and the oxidation time of the bottom silver layer, SERS substrates with different properties can be obtained. The SERS substrate provided by the application can be applied to a detection chip, and experimental results show that when the concentration of R6G is as low as 10 ‑9 M, the SERS substrate can still detect Raman signals, which indicates that it has the potential for trace detection.

The invention discloses a PS (at) PDA / Ni micro-nano motor with photo-thermal performance and a preparation method of the PS (at) PDA / Ni micro-nano motor. The method mainly comprises the following steps: preparing polydopamine coated polystyrene microspheres arranged in a single layer by using a chemical synthesis method and a dispensing method; depositing a magnetic nickel layer by using a physical vapor deposition technology; 808nm near-infrared laser is utilized to irradiate the micro-nano motor, and the photo-thermal performance of the micro-nano motor is detected. The micro-nano motor prepared by the method is of an asymmetric Janus structure and comprises polydopamine coated polystyrene spheres (the diameter is about 217nm) and a half-coated nickel film layer (the thickness is about 50nm). Wherein the polydopamine mainly plays a role in photothermal conversion, the nickel film layer mainly plays a role in magnetic response, the asymmetric structure can enable the micro-nano motor to realize thermal driving, and the micro-nano motor is expected to be applied to the fields of photothermal therapy, targeted transportation, in-vitro thrombolysis and the like.

The application provides an ordered macroporous carbon-supported bimetallic monatomic catalyst, a preparation method and application. The preparation method comprises the following steps: S1, synthesizing a polymer microsphere template, preparing a first transition metal-organic precursor solution, putting polystyrene ball templates into the first transition metal-organic precursor solution for normal-temperature immersion for 2 hours to obtain product A; S2, vacuum degassing the product A, performing suction filtration and placing the product A in an oven for drying overnight, placing the product A in a solution with an ammonia water and methanol volume ratio of 1:(0.8-1.2) for vacuum degassing, performing normal-temperature immersion for 20-30 hours, performing suction filtration to obtain the immersed template, placing the template in the oven for drying overnight to obtain a precursor-filled microsphere template; S3, placing the precursor-filled microsphere template in a tube furnace, introducing inert gas, and calcining to obtain product B; S4, mixing the product B with a second transition metal precursor solution, aging, centrifuging, drying, and then placing the product in a tube furnace, introducing inert gas, and calcining at 600-1000 DEG C for 2-4 hours.

According to the graded gold / tungsten oxide anti-dot array material, the graded gold / tungsten oxide anti-dot array material is arranged in a regular honeycomb shape, tungsten oxide nanopores grow in honeycomb gaps, and gold nanoparticles are evenly distributed in the honeycomb gaps. The invention further discloses a preparation method of the graded gold / tungsten oxide anti-dot array material and application of the graded gold / tungsten oxide anti-dot array material. According to the preparation method of the graded gold / tungsten oxide anti-dot array material, polystyrene spheres with different sizes are spin-coated and dried twice, then tungsten oxide with a graded structure is obtained, the tungsten oxide with the graded structure has a large specific surface area and a carrier transmission channel, and adsorption reaction of gas molecules and rapid transmission of charges are facilitated.

The invention discloses a carbon-based composite material for wheel lightweight and a preparation method and application thereof, and belongs to the field of automobile lightweight materials. The composite material is prepared from graphite powder, coconut shell powder, calcium sulfate whiskers, a phenolic resin aqueous solution, medium-temperature coal pitch, refined naphthalene powder and polystyrene spheres according to a specific ratio through low-temperature crushing, graded mixing, cold press molding, stepped drying and carbonization processes. The carbon-based composite material is low in density, high in high-temperature strength, integrated in function and controllable in cost.

The invention relates to the technical field of sensor analysis and detection, in particular to a preparation method and application of a self-powered sensor for lactic acid detection, polystyrene spheres (PS spheres) are introduced into a copper-iron co-doped zeolite imidazole framework 8 (CoFe-ZIF-8) to prepare a precursor, and the precursor is carbonized to obtain a catalyst PS-Co1-Fe1-NC. The catalyst shows oxygen reduction (ORR) performance higher than that of commercial Pt / C under alkaline and neutral conditions, and when the catalyst is used for an alkaline zinc-air battery (ZAB) and neutral ZAB, the performance of the catalyst is better than that of a commercial Pt / C + RuO2 battery. A self-energized sensing platform is constructed by a biological cathode modified by PS (at) Co1-Fe1-NC and lactate oxidase (LOx) and a zinc sheet and is used for lactic acid detection. When lactic acid exists, LOx catalyzes lactic acid to decompose and consume oxygen and reacts with ORR to form an oxygen consumption competitive relationship, so that the open-circuit voltage is reduced, and the purpose of detecting lactic acid is achieved. The application of the self-energized sensor in lactic acid detection is widened, and the self-energized sensor has a wide linear range, high sensitivity and low detection limit for lactic acid detection.

The invention discloses a construction method and application of a floating type photo-thermal driven persulfate activation system, and relates to the technical field of catalysts and photo-thermal gels. Prussian blue is added into ultrapure water, ultrasonic treatment is carried out, then activated carbon powder is added for vibration adsorption treatment, and the Prussian blue-activated persulfate activation system is obtained; after adsorption equilibrium is achieved, sodium alginate is added for a reaction, and photo-thermal catalyst-based hydrogel is obtained; adding polystyrene spheres into the photo-thermal catalyst-based hydrogel, and fully mixing to obtain polystyrene spheres fully wrapped by the photo-thermal catalyst-based hydrogel; adding the treated polystyrene spheres into a calcium chloride solution, standing, starting a cross-linking reaction, synthesizing floating type photo-thermal catalysis-based gel spheres, cleaning the floating type photo-thermal catalysis-based gel spheres with ultrapure water, putting the floating type photo-thermal catalysis-based gel spheres into the ultrapure water, adding persulfate, and uniformly mixing to obtain the floating type photo-thermal driven persulfate activation system. The invention solves the problems of poor energy economy, low-efficiency sunlight absorption, insufficient activation capability, complicated recovery technology and the like in the field of photocatalyst-driven persulfate activation.

A method for preparing a short-range ordered iridescent nanofilm with adjustable transparency comprises the following steps: Step 1: assembling metal nanoparticles at the interface of the two phases and transferring them to the desired substrate; Step 2: dispersing polystyrene spheres using n-butanol, assembling the short-range ordered structure on the water surface, and transferring the structure; Step 3: heating the sample above the glass transition temperature of the polystyrene and holding it for a period of time to cause the polystyrene to collapse, covering some of the metal nanoparticles; Step 4: cleaning the unprotected metal nanoparticles; Step 5: removing the polystyrene spheres, leaving the short-range ordered metal particle structure on the substrate. This method can produce an iridescent film with controllable color, adjustable transparency, and nanometer-scale thickness, and has important application prospects in fields such as anti-counterfeiting and exterior decoration.

The application discloses a preparation method of a high-strength and high-wear-resistance tungsten carbide hydrophobic layer on a steel material surface, and comprises the following steps: 1) obtaining a steel material with a carburized layer on the surface by pre-carburization; 2) preparing a tungsten layer and an iron layer on the surface of the carburized steel material in sequence, and adding aminated polystyrene microspheres in the process of preparing the iron layer so that a large number of aminated polystyrene microspheres are distributed at the interface between the tungsten layer and the iron layer; 3) performing carburization treatment, decomposing the aminated polystyrene microspheres at high temperature, converting the tungsten layer into a tungsten carbide layer, and forming a rough interface between the tungsten carbide layer and the iron layer; and 4) removing the iron layer and modifying the surface with a low-surface-energy substance, so as to finally obtain a rough tungsten carbide layer and a hydrophobic layer on the surface of the rough tungsten carbide layer. The hydrophobic layer prepared by the method has high strength and hardness, excellent wear resistance, strong film-substrate adhesion, good hydrophobicity and corrosion resistance, is simple to operate, has strong applicability and high production efficiency.

The invention belongs to the field of terahertz wave-absorbing materials and device integration thereof, and particularly provides a preparation method and application of a curved-surface flaky terahertz wave-absorbing agent, which are used for solving the problems that the bandwidth of the existing wave-absorbing material is insufficient, the integration of the wave-absorbing material, a coupler and a matched load is complicated, and the like. According to the invention, a polystyrene sphere (PS) sphere template is utilized, a graphene nanosheet (GNS) material with electromagnetic loss capability is adopted as a raw material of the wave-absorbing agent, and after full condensation reaction with a silane coupling agent, the material can be adsorbed on the surface of the PS sphere in a conformal manner, so that a curved sheet structure is presented on the spatial scale. The wave-absorbing agent with the curved surface structure is obtained through self-assembly on the premise that material components are not changed without doping or dipping other wave-absorbing agents with loss capacity, and the broadband strong absorption performance is achieved by utilizing the multiple reflection principle of the curved surface structure; in addition, integration of the wave-absorbing material and the coupler is realized.

The invention relates to the technical field of porous ceramic material preparation, in particular to a porous ceramic material for reducing noise and a preparation method thereof, and the preparation method comprises the following six steps: S1, mixing, S2, foaming, S3, homogenizing, S4, injection molding and demolding, S5, drying and S6, sintering. According to the invention, the fly ash is modified to replace common polystyrene spheres as a pore-forming agent, so that the range of pore size distribution is expanded, the apparent porosity is improved, the specific surface area of the porous ceramic is increased, and the production cost is reduced. In addition, the foaming agent and the gelling agent are modified, and the sound absorption coefficient of the prepared porous ceramic plate is improved. In addition, the raw materials used in the invention are mainly environment-friendly materials such as building waste, fly ash and sludge, are safe and non-toxic, and are relatively low in production cost; moreover, the preparation method is simple, and the performance of the product cannot be obviously influenced by small change of preparation conditions, so that the method disclosed by the invention has good repeatability and is suitable for large-scale production.

The invention provides a method for one-step recovery of polystyrene foam plastic by a suspension method. The method comprises the following steps: mixing and dissolving polystyrene and a good solvent to obtain a polystyrene solution; adding a foaming agent into the aqueous solution containing the emulsifier or the dispersant to obtain a mixed solution; adding the polystyrene solution in the step S1 into the mixed solution in the step S2, continuously stirring to form suspension or emulsion, and filtering to obtain the white polystyrene beads. According to the method, processing forming after precipitation is not needed, the suspension is prepared only by adjusting the proportion of all the components, polystyrene can be recycled in one step through dissolution and filtration, dissolution and granulation are completed synchronously, and high economic value is achieved. The particle size of the prepared spherical polystyrene beads is in a range of 0.1-2mm, and the spherical polystyrene beads can be directly used for a foam molding process.

The invention discloses a magnetic bead-bicolor quantum dot premixed host-guest encoding microsphere, a preparation method thereof and a multivariate analysis kit, bicolor hydrophobic quantum dots are premixed and assembled into dendritic silicon dioxide dSiO2, and the color proportion is regulated and controlled through premixing to prepare an encoding guest sphere. The main sphere is a 5-micron polystyrene sphere filled with superparamagnetic particles, a large number of object spheres are coupled to the surface of the main sphere through a statistical averaging effect, the fluctuation (standard deviation) of an integrally output coding signal (blue / red intensity ratio) is small, and the uniformity of the coding signal is improved. Meanwhile, small-size hollow silicon dioxide nanotubes are used for loading green quantum dots, so that the immunoreaction kinetics of the detection probe is improved. A core-satellite structure immune complex is formed by full quantum dot narrow emission under unitary excitation (405nm), blue-red double colors are used as coding colors, green is used as signal colors, coding multivariate analysis is carried out, and high-sensitivity and high-accuracy imaging quantitative analysis can be realized on various respiratory tract pathogen antigens.