15results about How to "Improve interface performance" patented technology

This invention relates to an insulating oil and an oil-paper insulation system containing superhydrophobic nanoparticles, as well as their preparation method and application, belonging to the field of electrical equipment insulation technology. This invention provides an insulating oil containing superhydrophobic nanoparticles, wherein the superhydrophobic nanoparticles are silane-modified nanoparticles, and the nanoparticles include at least one of SiO2, TiO2, and h-BN; the insulating oil includes at least one of mineral insulating oil, synthetic insulating oil, and natural ester insulating oil. This invention achieves the superhydrophobicity of the nanoparticles and good compatibility with the oil phase through silane modification. Adding silane-modified nanoparticles to the insulating oil effectively reduces the water content of the insulating oil and optimizes the interfacial performance of the oil-paper. Combined with the low-temperature, high-efficiency, and uniform rapid impregnation process of this invention, the overall electrical performance and service life of the oil-paper insulation system are significantly improved.

This invention relates to the field of metal material processing technology. It discloses a synergistic composite forming process for metal wire electroforming and drawing, comprising the following steps: first, surface cleaning and activation treatment of the base metal wire to remove oxide layers, oil stains, and impurities; then, feeding the pretreated wire into an electroforming device to deposit a metal plating layer, obtaining an initial electroformed composite wire; subsequently, direct online radial high-pressure drawing to achieve a dense bond between the electroformed layer and the base metal; followed by annealing of the composite wire; repeating the electroforming, drawing, and annealing steps at least once to complete multiple synergistic cycles; finally, testing the dimensional accuracy, mechanical properties, and interlayer bonding force of the composite wire, and cutting it into finished products after passing the tests. This invention employs an online tandem synergistic process of electroforming and drawing, avoiding plating oxidation and interface contamination. Radial high-pressure drawing can compact the plating layer, eliminate porosity, and improve bonding density.

This invention provides an epoxy resin-based composite waterproofing material, its preparation method, and its application. After curing, the epoxy resin-based composite waterproofing material exhibits high flexural strength and Shore hardness, as well as excellent oil penetration resistance. It is suitable for coating the tank walls, bottom plates, and floating roof surfaces of oil storage tanks, curing to form a waterproofing layer. This enhances the oil storage tank's resistance to oil leakage, thereby extending its service life and preventing economic losses and environmental hazards caused by oil leakage.

The application discloses an insect exoskeleton morphological layup composite panel, a sandwich structure and a preparation method. The sandwich structure comprises two pieces of bionic layup composite panels and a piece of aramid honeycomb core layer. The bionic layup composite panel draws lessons from the spiral stacking microstructure of the insect exoskeleton, the layup design considers the symmetry and balance requirements of the composite material, a fixed rotation angle is introduced between adjacent fiber layers, and the rotation angle is taken as a period of 180 degrees, and after a plurality of periods are laid and heat-pressed and cured, the bionic layup composite panel is obtained. The bionic layup design effectively reduces the interlaminar shear stress of the composite material, weakens the inherent anisotropy of the composite material, and improves the transverse bearing capacity and impact resistance. The bionic layup composite panel and the aramid honeycomb core layer have the advantages of high specific strength, high specific stiffness, impact energy absorption, vibration and noise reduction, electromagnetic shielding and the like, and a structure and function integrated material with more excellent comprehensive performance is obtained, and the structure and function integrated material is expected to be widely used in main load-bearing structures of various spacecrafts.

The present application relates to a kind of preparation method of full solid battery double-layer ultrathin electrolyte film based on transfer printing technology.The present application utilizes the high voltage stability of halide layer and the high ionic conductivity of sulfide layer to synergistically improve the cycle life and high rate performance of battery and other performances through halide / sulfide double-layer electrolyte design.Further, the transfer printing process of multi-layer electrolyte film is designed specifically, and the gradient drying process can avoid substrate deformation, effectively prevent halide / sulfide interlayer cracking, and enhance the interlayer adhesion, achieving electrode thinning, high mechanical strength and interface stability.The present application solves the technical bottleneck of the application difficulty of double-layer electrolyte structure in full solid battery through material system optimization and transfer printing process innovation, and is suitable for the industrial production of high energy density solid state battery.

This invention discloses an anti-aging power metering box cabinet material, relating to the field of organic materials technology. The anti-aging power metering box cabinet material comprises the following raw materials by weight percentage: 25%-35% unsaturated polyester resin, 11%-15% low-shrinkage agent, 0.5%-2% initiator, 2.5-8% additives, 35%-50% organic composite filler, and 15%-25% modified chopped glass fiber. This application adds the prepared modified chopped glass fiber to the unsaturated polyester resin, along with the remaining additives required for preparing the electrical cabinet material, to obtain the cabinet material for use in power metering boxes. The power metering box cabinet material prepared in this application has advantages such as excellent mechanical properties, stable environmental aging resistance, low dielectric loss, and low dielectric constant.

This invention discloses a method for in-situ generating a highly bonded Cr2O3 interface to improve the thermal shock resistance of coatings. The method involves a coating preparation technique, particularly in the process of preparing a coating on a Cr-containing metal substrate, where an electric field of specific intensity is applied during the high-temperature heat treatment stage. By utilizing the electric field to induce the outward diffusion of Cr ions and the inward migration of oxygen ions in the substrate, a dense Cr2O3 transition layer is in-situ induced at the interface between the coating and the metal substrate. This transition layer effectively alleviates the problem of thermal expansion coefficient mismatch between the ceramic coating and the metal substrate, releases interfacial thermal stress, and significantly enhances the bonding strength of the coating. This invention achieves control over the thickness of the transition layer by adjusting the current intensity. Experiments show that this method can significantly suppress the generation of microcracks during thermal shock cycling, thereby greatly improving the thermal shock resistance of the coating and effectively solving the problem of easy cracking and peeling of oxide coatings during high-temperature thermal cycling.

The application provides a high-voltage sodium ion battery additive and an electrolyte thereof, and belongs to the field of sodium ion batteries, and comprises a nonaqueous organic solvent, a sodium salt and an electrolyte additive, the high-voltage sodium ion battery electrolyte is applied to a sodium ion battery with a maximum working voltage of 4.0V-4.3V, and the electrolyte additive is a 1H, 1H, 5H-octafluoropentyl-1, 1, 2, 2-tetrafluoroethyl ether compound. In the first charging process of the battery, the electrolyte additive participates in the introduction of F elements to form an inorganic positive electrode interface passivation film, blocks the direct contact between the electrolyte and the positive electrode surface, reduces the occurrence of side reactions between the cathode and the electrolyte, plays a role in protecting the cathode, improves the interface performance of the positive electrode material, effectively reduces the internal resistance of the battery, inhibits the capacity reduction, and can effectively improve the high-voltage cycle performance of the sodium ion battery.

This invention relates to the field of polyurea technology and discloses an antistatic waterborne polyurea coating and its preparation method, comprising component A (100 parts by weight of terminal isocyanate prepolymer); component B (6.8-13.7 parts by weight of diamine chain extender, 42-60 parts by weight of polyvinylpyrrolidone copolymer, and 1-4 parts by weight of PVP-modified carbon nanotubes). After modification with PVP dispersant, the carbon nanotubes exhibit better dispersibility in the waterborne polyurea coating, forming a uniform conductive and thermally conductive network, thus improving antistatic and thermal conductivity, while also enhancing the mechanical properties of the polyurea. The polyvinylpyrrolidone copolymer contains hydrophilic carboxyl and amino groups, exhibiting excellent dispersibility in the waterborne polyurea coating. Furthermore, the amino groups can react with the isocyanate groups of the terminal isocyanate prepolymer, thereby forming a three-dimensional chemical crosslinking effect, which synergistically enhances the tensile and tear strength of the polyurea coating.

The application discloses a kind of Ce-La composite carrier load Cu-Ni bimetallic photo-thermal catalyst and its preparation method, for the defects of existing pure carrier oxygen vacancy concentration fixed, active metal is easy high-temperature agglomeration, catalytic activity and stability are insufficient, the Ce-La composite carrier is constructed by La doping modification in the application, and Cu-Ni bimetallic is formed 8Cu2Ni / aCebLa catalyst.La exists in the form of La-Ce-O solid solution, significantly improves the carrier oxygen vacancy concentration and activation capacity, while strengthening metal-carrier interaction, anchoring bimetallic particles to inhibit sintering, improve catalyst stability.

This invention discloses a lightweight, high-strength modular UHPC wall panel and its preparation method, belonging to the technical field of UHPC components for prefabricated buildings. The wall panel comprises upper and lower UHPC panels, a middle lightweight foam core layer, vertical UHPC core columns penetrating the foam core layer, and horizontal UHPC ribs intersecting the core columns. A prefabricated three-dimensional interlocking skeleton is set inside the wall panel. The interface at the junction of the UHPC panel and the core column is constructed as a dovetail-groove or corrugated variable cross-section shear key interface. The ultra-high fluidity of the UHPC fills the interface to form concrete "mortise and tenon" shear keys, improving the overall stability and out-of-plane peeling resistance of the wall panel's sidewalls, which are equivalent to the frame columns. This invention addresses the requirements of lightweight, high strength, and prefabricated construction, solving problems such as easy foam floating and weak shear at the core-rib intersection area in existing sandwich wall panels.

This application relates to the field of concrete technology, specifically disclosing a fair-faced concrete and its preparation method. The raw materials for fair-faced concrete include cement, fly ash, mineral powder, glass powder, sand, reinforcing coarse aggregate, water, water-reducing agent, defoamer, and pumping agent; the preparation method is as follows: (1) cement, fly ash, mineral powder, glass powder, sand, and reinforcing coarse aggregate are added to a mixer and mixed evenly; (2) water, water-reducing agent, defoamer, and pumping agent are added to the mixer and mixed evenly to obtain fair-faced concrete. The fair-faced concrete of this application has the characteristics of high strength and high fluidity. Therefore, the vibration step is omitted during the construction and pouring process, greatly shortening the construction cycle, reducing the possibility of operational errors, and reducing rework costs.

The application provides a carbon fiber composite plate scratch repairing method and belongs to the technical field of carbon fiber composite material repairing. The method comprises the following steps: identifying a part to be repaired, determining the damage condition of the part to be repaired; pretreating the part to be repaired; preparing a repairing material slurry, then spraying and curing to obtain a coating, and completing the repairing treatment; the repairing material slurry is mainly prepared from carbon fibers, epoxy resin and modified carbon nanotubes. The carbon fiber composite plate repaired by the method has a tensile strength recovery rate of 98%, the interface between the repairing area and the base material is firmly combined, and no falling phenomenon occurs after 500 cold and hot cycles.

The invention belongs to the technical field of perovskite solar cells, and provides a perovskite thin film based on a volatile additive and a preparation method and application thereof. According to the perovskite thin film provided by the invention, the perovskite matrix and the volatile additive are used as main raw material components, and the volatile additive comprises at least one of a beta-diketone compound, a carboxylic acid compound, an amide compound and a nitrogen-containing heterocyclic compound. The volatile additive promotes crystallization of perovskite in a large-grain and highly preferred orientation mode, crystal growth can be effectively regulated and controlled in the annealing process, bulk phase or surface defect passivation is achieved, interface performance is optimized, and finally the high-quality perovskite thin film with larger grain size and remarkably reduced grain boundaries is successfully prepared. And the volatile additive does not remain in the film after volatilization. The perovskite thin film provided by the invention can be used for preparing a perovskite solar cell device.

The application relates to the technical field of high polymer materials, and discloses a heat-conducting PP material and a preparation method thereof. The PP material prepared by the application is prepared by extruding and granulating after blending of polypropylene as a main base material, addition of a heat-conducting reinforcing agent, maleic anhydride grafted polyethylene, ethylene-octene copolymer, an antioxidant and lubricant and other auxiliaries; the heat-conducting reinforcing agent added in the PP material improves the heat-conducting performance and impact resistance of the material while maintaining the mechanical performance. Therefore, the comprehensive performance of the material is improved, so that the material can be widely applied in the fields of electronic device shells, LED lighting heat-dissipation shells, relay shells and the like.