4 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 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 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.

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.