14 results about "Polystyrene bead" patented technology

This invention provides an environmentally friendly expandable polystyrene bead and its preparation process, belonging to the field of foaming material technology. The preparation process includes the following steps: S1, injecting 65.28g of deionized water into a reaction vessel, stirring, adding 0.13g of dispersant and 0.16g of composite stabilizer, dispersing for 20min, then adding 31.95g of styrene monomer and 0.3g of composite initiator, followed by the addition of pentane and SiO2 micelle composite to obtain a base solution; wherein the mass ratio of pentane to SiO2 micelle composite is 1:(0.2-0.3); the mass of pentane is 3.1%-3.2% of the mass of the base solution; S2, subjecting the base solution to stepwise heating at 86℃-140℃ with stirring, then stopping heating, continuing stirring, and allowing it to cool naturally to 40℃, then stopping stirring, with a total reaction time of 8.5-9.5h to obtain the reaction product; S3, discharging the material, washing the reaction product with warm water, filtering, and obtaining the environmentally friendly expandable polystyrene beads. This invention improves the average particle size of expandable polystyrene beads while reducing fine powder.

The described method leverages nanosphere lithography (NSL) using nanoparticles having Young's modulus of at least 5 GPa, such as silica beads, to create high-density, periodic DNA origami nanoarrays on glass surfaces. In some aspects, by employing 1 μm silica beads, which have a higher Young's modulus compared to polystyrene beads, the sticky patch size (100 nm) is spaced out by 1 μm while maintaining DNA origami structures per spot. The resulting nanoarray consists of sticky patches with single DNA origami. This clean room-free fabrication method significantly reduces the cost per chip, while enabling precise positioning of target molecules at high throughput.

A method of fabricating plasmonic gold prism arrays for digital surface enhanced Raman spectroscopy, a plasmonic gold prism array arranged on a substrate for digital surface enhanced Raman spectroscopy, and a method of using a plasmonic gold prism array that is arranged on a substrate for digital surface enhanced Raman spectroscopy are disclosed. The method of fabricating plasmonic gold prism arrays for digital surface enhanced Raman spectroscopy includes depositing more than one layers of chromium and gold onto a plasmonic substrate comprising a monolayer of polystyrene beads and removing the monolayer of polystyrene beads under sonication in ethanol.

Disclosed herein are dry-mix and wet-mix compositions for lightweight plasters, kits for preparing lightweight plasters, lightweight plasters, and methods of making lightweight plasters. A dry-mix composition comprises a hydratable binder and polymer beads, the polymer beads having a mean equivalent particle diameter of no greater than 2.5 mm. A kit for preparing lightweight plasters comprises the dry mix composition and an accelerator composition. A method for preparing a plaster comprises mixing the dry-mix composition with water to prepare a wet mix composition, applying the wet mix composition to a surface of a substrate, and allowing the wet mix composition to dry to form a plaster.

The disclosure features calibration fluids that include a plurality of beads, such as cellulose, silica, poly(methyl-methacrylate) (PMMA), melamine, cross-linked agarose, polyvinylacetate (PVA), and / or polystyrene beads, where the beads are sized and colored to represent at least one type of blood cell; and a carrier fluid, that can include a polymer or polymerizing matrix, e.g., a water-soluble resin, e.g., an acrylic or polyurethane water-soluble resin or a starch or a cellulose, serum, and / or one or more or sugars. The disclosure also features methods of using the calibration fluids to calibrate automated sample preparation systems, such as automated hematology analyzer systems, e.g., image-based hematology analyzer systems.

A dry mix of a thermally insulating fill material for backfilling and / or filling. The fill material includes a cement-based binder and a thermally insulating material, and the thermally insulating material is newly foamed monograin polystyrene beads.

The invention relates to the technical field of foaming materials, in particular to a foaming filling buoy material and a preparation method thereof. According to the material, polystyrene beads are used as a matrix and matched with a main foaming agent, an auxiliary foaming agent, a dispersing agent, a cross-linking agent, a nucleating agent and a toughening agent, fluorosilicone-polyvinyl alcohol compound powder and a chitosan oligosaccharide ester modifier are specially added, and meanwhile, the process of heating rate and feeding window is used for accurate control; the problems of high water absorption rate, mechanical property attenuation and unstable size of a traditional foaming material in a high-humidity environment are solved. The obtained foaming buoy material is low in density and high in compression resistance and impact resistance, the water vapor transmission rate and the damp-heat size change rate are remarkably reduced, the comprehensive performance of high strength, low water permeability and stable size in a high-humidity environment is achieved, and the foaming buoy material can be widely applied to the bearing fields of ocean buoys, overwater structures and other long-term exposed damp-heat environments.

The present invention relates to an admixture composition for the production of lightweight concretes containing polystyrene beads, which comprises a mixture of organic and inorganic substances which consists of the reaction products of polyurethane resin, tetraethyl orthosilicate, a glycol compound, an aromatic vinyl compound containing an unsaturated double bond, preferably styrene, and an inorganic silicate compound and preferably comprises the following components: glycol copolymer type compounds, in an amount of 15-10 w / w %, glycol polymer-silica type compounds, in an amount of 45-50 w / w %, polyurethane-b as ed resin, in an amount of 13-22 w / w % polystyrene in an amount of 2-3% w / w %, and foam glass beads in an amount of 25-15 w / w %, and a) for the production of a liquid product, based on the total mass of the above composition, organic solvents in an amount of 15-20 w / w %, and water in an amount of 10-5 w / w %; or b) for the production of a solid preparation, based on the total mass of the above composition, polyvinyl acetate or polyvinyl alcohol in an amount of 10-5 w / w %; aluminium hydroxide in an amount of 2-5 w / w %, and calcined limestone powder in an amount of 8-10 w / w %. The invention also relates to the production and use of the above admixture composition.

This invention discloses expandable recycled polystyrene beads and their preparation method, relating to the field of waste plastic recycling and functional polymer materials technology. The raw materials, by weight, include: 100 parts waste polystyrene material; 10-30 parts solvent; 5-15 parts physical foaming agent; 0.5-2 parts surface coating material; 0-5 parts compatibilizer; and 0-2 parts nucleating agent. The preparation method includes raw material pretreatment, solvent-assisted swelling, low-temperature granulation, foaming agent loading, surface coating, and drying steps. This expandable recycled polystyrene bead and its preparation method, through solvent-assisted swelling and supercritical CO2-assisted foaming agent loading, achieve uniform dispersion of the foaming agent in the recycled material, with a closed-cell rate ≥90%, solving the problems of uneven loading and poor cell structure of traditional physical foaming agents. The prepared expandable recycled polystyrene beads are suitable for building insulation, cushioning packaging, lightweight composite materials, transportation, and buoyancy materials.

The present application relates to wave-absorbing material technical field, specifically to a kind of flame-retardant wave-absorbing material based on polystyrene foam and preparation method thereof.The present application uses one-dimensional magnetic sepiolite fiber and two-dimensional modified graphene oxide as raw material, three-dimensional directional porous structure composite aerogel is prepared by freeze drying, composite aerogel, flame retardant, film forming agent, dispersing agent, defoaming agent and deionized water are obtained to obtain wave-absorbing coating;Foamed polystyrene beads are put into wave-absorbing coating, and after stirring evenly, drying, molding, the flame-retardant wave-absorbing material based on polystyrene foam is obtained.The flame-retardant wave-absorbing material based on polystyrene foam prepared by the present application not only has excellent wave-absorbing performance, but also has excellent flame-retardant performance and mechanical properties.

The application provides a kind of graphite grade expandable polystyrene beads and its preparation process, belong to expandable polystyrene technical field, the preparation process includes steps: S1, according to weight fraction, 150-230 parts of deionized water is injected into reaction kettle, 0.5-1 parts of dispersion stabilizer is added, stirring, 100 parts of styrene, 3.3-3.8 parts of intercalation-modified double modified graphite, 0.3-0.35 parts of initiator and 0.9-1.1 parts of phosphorus-nitrogen system intumescent flame retardant are added, continue to stir, heat to 86-90 DEG C, constant temperature 7-9 h, obtain granular dispersion phase;S2, 5.6-6.2 parts of foaming agent is added to granular dispersion phase, temperature is raised to 120 DEG C, after continuous reaction 4.5-5.5 h, cooling, discharge, cleaning, filtration, the graphite grade expandable polystyrene beads are obtained;Intercalation-modified double modified graphite is prepared by surface modification of polybutylene succinate-1,3-propanediol ester from oxidized intercalation graphite.The application ensures that the product prepared has excellent thermal stability, and improves its flame retardance.

This invention provides a flame-retardant expandable polystyrene bead and its preparation method, belonging to the field of polystyrene bead technology. By weight, it is prepared from the following raw materials: 20 parts styrene monomer, 0.20-0.25 parts organic dispersant, 0.05-0.15 parts inorganic dispersant, 0.75-0.85 parts foaming agent, 3.8-4.2 parts hyperbranched core-shell flame retardant, 0.4-0.6 parts initiator, and 90-110 parts water. The hyperbranched core-shell flame retardant is obtained by shell coating and hyperbranching of expanded graphite. Adding the hyperbranched core-shell flame retardant during the polystyrene polymerization process ensures good compatibility between the expanded graphite and the polymer matrix. Simultaneously, after high-temperature expansion, it effectively encapsulates and protects the matrix material. The resulting polystyrene foam material exhibits excellent flame-retardant properties while maintaining high compressive strength.

The invention relates to a thermal-insulation high-strength foam box and a preparation method thereof, and belongs to the technical field of foam boxes, the foam box is obtained by pre-foaming expandable polystyrene beads, curing, spraying an adhesion promoter, blending with short fibers, filling into a mold, and carrying out steam heating molding; wherein the adhesion promoter is prepared from the following components in parts by weight: 25 to 35 parts of Arabic gum, 5 to 12 parts of mango gum and 55 to 75 parts of plant extract; the short fibers comprise 30-36 parts of artificial fibers and 64-70 parts of plant fibers. The foam box is obtained by pre-foaming and curing expandable polystyrene beads, spraying an adhesion promoter, blending with short fibers, filling into a mold, and carrying out steam heating molding, and a mixed reinforcing system of plant fibers and synthetic fibers is introduced, so that the compression resistance and deformation resistance of the material can be effectively improved, and brittle rupture of the box body is prevented; the two materials are mixed to realize a synergistic effect of combining rigidity and softness, so that the compressive strength and the impact resistance of the foam box are improved.