8results about How to "Avoid phase separation" patented technology

This application relates to the field of solar cells, disclosing perovskite materials, perovskite layers, their preparation methods, perovskite solar cells, and photovoltaic modules. The perovskite material has a band gap of 1.65 eV to 1.75 eV, and its chemical formula is ABX3, where A is an A-site cation, B is a B-site cation, and X is an X-site anion. The elements corresponding to the X-site anion include iodine, bromine, and chlorine. In the perovskite material, the mass percentage of bromine is 0.0001% to 0.0012%, and the mass percentage of chlorine is 0.0005% to 0.0020%. The perovskite material provided in this application, while meeting the wide band gap requirement, helps to avoid the formation of bromine-rich phases, thereby effectively preventing the separation of bromine and iodine phases and ensuring that the perovskite layer prepared using this material has high structural stability.

The present application belongs to the technical field of building coatings, and relates to a dual formaldehyde-removing and antibacterial coating and a preparation method thereof. The formaldehyde-removing and antibacterial coating prepared by the method can effectively remove formaldehyde under the action of ultraviolet light catalyst, and at the same time, the amino group can react with the negative charge on the bacterial cell membrane to cause the integrity of the bacterial cell membrane to be destroyed, so that the permeability of the bacterial cell membrane is changed, the cell contents are leaked, and finally the cell death is caused. The polyethylene imine grafted sodium alginate is introduced into the surface of titanium dioxide, so that the high adsorption performance of the alginate on formaldehyde and the dual formaldehyde-removing and antibacterial effect are utilized, and the dispersibility of the filler in the coating matrix is improved through the chemical bond and action between the amino group carried by the polyethylene imine and the epoxy resin. Therefore, the agglomeration problem of the inorganic filler is reduced, the formaldehyde-removing and antibacterial performance of the coating is improved, and the efficient and long-lasting application of the functional coating in the natural indoor environment is realized.

This invention relates to the field of advanced petrochemical new materials technology, and discloses a luminescent composite material, its preparation method, and its application. The composite material comprises the following components: homopolymer polypropylene, polybutylene succinate, a compatibility modification system, double-modified rare-earth strontium aluminate luminescent powder, dispersant, antioxidant, weathering agent, toughening agent, nucleating agent, and silane coupling agent. This invention employs a compatibility modification system composed of maleic anhydride-grafted PP-g-PBS copolymer and double-modified nano-montmorillonite. The maleic anhydride-grafted PP-g-PBS copolymer constructs a chemical link between the polypropylene and polybutylene succinate molecular chains through a grafting reaction, reducing the interfacial tension between the two resins. The double-modified nano-montmorillonite, after ionic liquid intercalation and silane grafting treatment, exhibits increased interlayer spacing and improved surface activity, uniformly dispersed in the matrix, and acts as a physical crosslinking point, improving the compatibility of the matrix resin and preventing phase separation.

This invention relates to the field of silicone technology, specifically to a silicone composite thermally conductive material and its preparation process. The preparation process of a silicone composite thermally conductive material includes: pretreatment of graphene filler, preparation of modified graphene filler, preparation and modification of heterogeneous filler, and preparation of the silicone composite thermally conductive material. This invention utilizes modified graphene and the construction of a boron nitride-silica heterogeneous filler to form a multi-level thermally conductive network. Combined with electric field-induced ordered arrangement of fillers and pretreatment of graphene with chemically reduced gel and directional ice template, multiple methods are used synergistically to reduce interfacial thermal resistance and phonon scattering, constructing continuous thermally conductive channels. Simultaneously, it improves the structural uniformity, thermal conductivity stability, and mechanical properties of the composite material, effectively solving problems such as filler agglomeration and migration, and significantly improving the thermal conductivity of the silicone composite material.

The application provides a preparation method of wear-resistant and water-absorbing regenerated polyester fiber, comprising the following steps: S1. mesoporous silicon dioxide is immersed in a salt solution to obtain salt-containing silicon dioxide; S2. the salt-containing silicon dioxide and regenerated polyester chips are placed in a double-screw extruder for blending, extrusion and granulation to obtain modified regenerated polyester skin layer master batch; S3. sodium alginate / cellulose nanocrystal composite nanomaterial and regenerated polyester chips are placed in a double-screw extruder for blending, extrusion and granulation to obtain modified regenerated polyester core layer master batch; S4. the master batches prepared in S2 and S3 are respectively used as skin layer and core layer master batches, dry spinning is adopted, and drafting is performed to obtain a skin-core structure fiber; and S5. the skin-core structure fiber obtained in S4 is immersed in a saturated calcium chloride solution, vacuum impregnation is performed, and a wear-resistant and water-absorbing regenerated polyester fiber is obtained. The application prepares a regenerated polyester fiber which can realize the synergistic improvement of wear resistance and water absorption performance, and has mechanical stability and environmental protection.

The application relates to the technical field of building materials, in particular to a core material for A-grade fireproof metal composite board and a preparation method thereof. According to weight parts, the core material for the A-grade fireproof metal composite board comprises the following raw materials: 30-60 parts of base resin, 20-40 parts of flame retardant, 5-10 parts of modified montmorillonite, 0.5-2 parts of coupling agent, 0.5-3 parts of dispersant, 1-3 parts of compatibility agent and 0.5-3 parts of lubricant. The core material has excellent flame retardancy, antibacterial property and mechanical property.

The application relates to the technical field of organic silicon materials and ultraviolet light curing, and discloses a preparation method of a (methyl) acryloxy silane oligomer and a UV cured product thereof. The method comprises the following steps: carrying out hydrolysis condensation reaction on KH-572 monomers, an alcohol solvent and a catalyst at 40-60 DEG C, and preparing KH-572 oligomers with a polymerization degree of 5-25 by controlling the hydrolysis conditions; and mixing the oligomers with methyl methacrylate and a photoinitiator according to a weight ratio of (60-70):(40-30):(1-3), and then carrying out ultraviolet light curing forming. The application solves the technical problem that the KH-572 monomers cannot be directly used for curing by controllable polymerization, and the obtained cured coating has the advantages of compact structure and controllable hydrophobicity. The preparation method is simple in process and easy for industrialized production.

The application belongs to the technical field of resin materials for copper-clad plates, and particularly relates to a carbon-hydrogen resin composition for prepreg and a preparation method thereof. The carbon-hydrogen resin composition is prepared from the following raw materials in parts by mass: hyperbranched modified prepolymer resin 90-100 parts, inorganic filler 15-25 parts, silane coupling agent 0.2-0.4 parts, crosslinking agent 10-20 parts, initiator 0.8-1.5 parts, dibutyltin dilaurate 0.1-0.3 parts, antioxidant 0.5-1 part, and toluene 50-80 parts. The carbon-hydrogen resin composition prepared by the application has low dielectricity, high thermal conductivity, high heat resistance, high toughness, and excellent processing forming property.