23results about How to "Improve interfacial wettability" patented technology

The invention discloses a modified and toughened PET (polyethylene terephthalate) endurance plate and a preparation method thereof, and relates to the technical field of PET modification, the modified and toughened PET endurance plate is composed of a macromolecular prepolymer, a toughening modifier, a compatilizer, matrix PET resin and a nanoscale inorganic filler; the macromolecular prepolymer is introduced into a branched structure through a modified chain extender, so that the strength and toughness of the matrix are improved; the toughening modifier adopts an elastomer and a functional monomer for graft copolymerization, so that the impact property is improved; the compatilizer is prepared by condensing an oligomer and a surface coupling reagent, so that the interfacial compatibility is improved; the nano filler is subjected to surface modification, so that the impact resistance and thermal stability of the material are enhanced; according to the invention, component synergy is realized through a multi-stage mixing and segmented feeding process, functional components such as a flame retardant and a light stabilizer are further introduced, the flame retardance, weather resistance and aging resistance are remarkably improved, the defects of fragility and multi-component blending interface of traditional PET are overcome, and the composite material is widely applicable to the field of high-performance plastic products.

The invention provides conductive silver paste and a preparation method thereof, and relates to the technical field of electronic paste. The conductive silver paste comprises conductive silver powder, a gallium-based liquid metal-based composite functional material, an organic resin binding phase, a curing agent, an organic solvent and an auxiliary agent, wherein the conductive silver powder is 55-75 parts by weight; the weight part of the gallium-based liquid metal-based composite functional material is 5-25; the weight part of the organic resin binding phase is 4-10; the weight part of the curing agent is 1-3; the weight part of the organic solvent is 2-10; the weight part of the auxiliary agent is 0.1-10 parts; the gallium-based liquid metal-based composite functional material comprises gallium-based liquid metal, a conductive polymer and a few-layer two-dimensional material, wherein the gallium-based liquid metal comprises one or more of gallium, gallium-tin alloy, gallium-indium alloy, gallium-indium-tin alloy or gallium-indium-tin-zinc alloy; the conductive polymer comprises one or more of polypyrrole, polydopamine or polyaniline; the few-layer two-dimensional material comprises graphene or transition metal carbide.

The invention discloses a polymer electrolyte with low interface impedance and a preparation method and application thereof. The electrolyte comprises the following components in percentage by mass: 30-45% of alkene polymer, 10-25% of disodium salt and 35-50% of plasticizer, the disodium salt contains sodium tetrafluoroborate, and the mass of the sodium tetrafluoroborate is 50-60% of the mass of the disodium salt. The electrolyte is prepared by the following steps: uniformly mixing raw materials including an alkene polymer, disodium salt and a plasticizer under a protective atmosphere, pouring the mixture on a mold, and drying. According to the solid-state sodium battery prepared based on the polymer electrolyte provided by the invention, the problems of serious side reaction between the electrolyte and an electrode interface and high interface impedance are effectively solved, and the cycling stability and the structural safety of the solid-state sodium battery are greatly improved. Tests show that the sodium battery provided by the invention circulates for 650 circles at the rate of 1C, and the maximum capacity retention rate can reach 94.4%.

The invention discloses a method for preparing porous activated carbon based on pulse electrochemical activation, the porous activated carbon and application, and the method comprises the following steps: preparing a working electrode plate from carbon powder, and placing the working electrode plate in an electrolyte for pulse electrochemical square wave circulation treatment, wherein the electrolyte is an aqueous solution containing sulfuric acid, persulfate, sulfate and a cationic surfactant, stripping, cleaning and drying to obtain the porous activated carbon. According to the preparation method, the carbon powder is prepared into the working electrode plate, and the working electrode plate is subjected to pulse electrochemical square wave circulation treatment in the electrolyte containing the sulfuric acid, the persulfate, the sulfate and the cationic surface active agent, so that the porous activated carbon with large specific surface area, high electro-adsorption capacity and good conductivity can be prepared; when being used as a raw material for preparing a capacitive deionization electrode, the composite material shows good conductivity, high desalination capacity and high desalination rate, can be widely used for electro-adsorption desalination, and is high in use value and good in application prospect.

The invention discloses a mask removing liquid medicine, a low-concentration alkaline aqueous solution and a mask removing method. The mask removing liquid medicine comprises the following raw materials in percentage by mass: 5%-15% of an alkaline activator, 0.5%-4% of a swelling agent, 0.3%-0.8% of a surfactant, 0.05%-0.3% of a complexing stabilizer and the balance of ultrapure water. In the low-concentration alkaline aqueous solution prepared by adopting the mask removing liquid medicine provided by the invention, the traditional pure solvent or high-concentration solvent is abandoned, and the mask is removed by adopting the low-concentration alkaline aqueous solution, so that the environment can be improved, the safety can be guaranteed, the cost can be greatly reduced, and meanwhile, the quality of cleaning and removing the mask can be guaranteed.

The present invention relates to a cyclic carbonate prepolymer, a silane-modified non-isocyanate polyurethane resin, and a preparation method and application thereof. The cyclic carbonate prepolymer is prepared by the following steps: S1: reacting a polymer polyol with a dibasic acid anhydride to obtain a polymer polyacid; S2: adding glycerol carbonate and reacting to obtain the cyclic carbonate prepolymer; wherein the molecular weight M of the polymer polyol is w The cyclic carbonate prepolymer is chain extended with a small amount of diamine chain extender and aminosilane coupling agent to obtain a silane-modified non-isocyanate polyurethane resin. The silane-terminated modified non-isocyanate polyurethane resin is liquid at room temperature, has low viscosity, and has good interface wettability. The sealing adhesive prepared by using the silane-terminated modified non-isocyanate polyurethane resin as a base resin has excellent bonding force and good mechanical properties after curing.

This invention discloses a high thermal conductivity semiconductor packaging substrate and its preparation method, relating to the field of electronic materials technology. The method includes the following steps: mixing composite aluminum nitride powder with a sintering aid, ball milling, drying, and pressing into shape; sintering under high temperature and high pressure in a nitrogen atmosphere to obtain an aluminum nitride ceramic substrate; washing and drying the aluminum nitride ceramic substrate; covering both sides of the aluminum nitride ceramic substrate with copper foil, laying active solder between the aluminum nitride ceramic substrate and the copper foil, and then connecting them by vacuum brazing to obtain the semiconductor packaging substrate; the composite aluminum nitride powder is composed of aluminum nitride powder and modified aluminum nitride powder in a mass ratio of (6~8):(2~4). The semiconductor packaging substrate prepared by this method has excellent interfacial compatibility, effectively reduces interfacial thermal stress, and has good thermal conductivity.

The invention discloses a heat insulation polytetrafluoroethylene composition for a missile electronic cabin cover, which adopts modified porous SiO2 as a functional filler, constructs a reversible solid-liquid phase change heat absorption system in a polytetrafluoroethylene matrix, and actively intercepts and stores intrusion heat through phase change latent heat, thereby significantly delaying the temperature rise of the back of the cabin cover; meanwhile, perfluoropolyether phosphate is introduced, so that the interface bonding between the filler and a matrix is greatly improved. The two components cooperate with each other, so that the composite material keeps the inherent low dielectric property and high mechanical strength of polytetrafluoroethylene while obtaining excellent dynamic heat insulation performance, and unification of wave transmission, heat insulation and bearing functions is realized. In addition, the process is completely compatible with an existing polytetrafluoroethylene mold pressing-sintering production line, equipment investment and energy consumption are reduced, and an efficient and low-cost technical path is provided for industrial preparation of the high-performance missile electronic cabin cover.

This invention relates to the field of semiconductor display device manufacturing technology, and discloses a reusable MicroLED chip transfer temporary carrier and its preparation method. The carrier includes a rigid support substrate layer, a peelable intermediate layer, and an elastic functional layer stacked sequentially from bottom to top. The peelable intermediate layer is a double-layer film material, including a bottom acrylic adhesive layer and an upper PVC substrate layer. The elastic functional layer is a polydimethylsiloxane layer cured on the surface of the PVC substrate layer. The preparation method includes plasma cleaning of the substrate, attaching the double-layer film material and rolling and cutting, vacuum degassing and homogenizing the adhesive, and thermal curing. By blocking the penetration of liquid adhesive through the PVC substrate layer, the aged elastic functional layer can be peeled off along with the intermediate layer, avoiding residual adhesive on the substrate. This enables the non-destructive recycling and reuse of the rigid substrate, effectively reducing chip transfer costs.

The application discloses high-resistance electrically fused zirconia-corundum brick and a preparation method and application thereof, and belongs to the technical field of refractory materials. The high-resistance electrically fused zirconia-corundum brick comprises the following raw materials in percentage by mass: zirconia 40%-42%, silicon dioxide 10%-11.5%, sodium oxide 0.9%-1.1%, magnesium oxide 0.1%-0.3%, cerium oxide-based mixed powder 0.1%-0.3%, lanthanum oxide 0.1%-0.3%, pretreated zirconia 0.5%-1.5%, and the rest is aluminum oxide. The cerium oxide-based mixed powder forms a crystal boundary resistance barrier and improves interface compatibility, and gives the material high-resistance characteristics and stable doping effects. The pretreated zirconia improves interface bonding by removing surface impurities, forms a bridging toughening and phase change toughening synergistic effect with the matrix, and improves room temperature bending strength and thermal shock resistance. The high-resistance electrically fused zirconia-corundum brick has high resistivity, good mechanical properties and corrosion resistance.

The invention belongs to the technical field of solid-state batteries, and relates to a double-layer solid-state electrolyte membrane, a preparation method thereof and application of the double-layer solid-state electrolyte membrane in a solid-state battery. The double-layer solid electrolyte membrane comprises a positive electrode membrane and a negative electrode membrane which are arranged in sequence; the positive electrode film is prepared from a positive electrode film solution, and the positive electrode film solution comprises 1-3 parts by weight of nano zinc oxide quantum dots; the negative electrode film is prepared from a negative electrode film solution, and the negative electrode film solution comprises 1-4 parts by weight of nano zinc oxide quantum dots. The nano zinc oxide quantum dots are added into the positive electrode film and the negative electrode film, so that the mechanical strength and the ionic conductivity of the positive electrode film can be effectively improved; meanwhile, the nano-zinc oxide quantum dots have relatively strong adsorbability on the DMF solvent, and a large amount of residual DMF solvent is adsorbed in the nano-zinc oxide quantum dots, so that the large amount of residual DMF solvent is prevented from directly generating side reaction with the positive electrode material, and the ionic conductivity of the solid electrolyte and the charge-discharge performance of the battery are improved.

The application discloses a cutting and welding integrated device and method for a building steel decorative plate; the application sprays active alloy powder to a welding edge position to strip burr surface oxide scales and embed the powder to form a to-be-welded active layer; the active alloy powder is used to remove the burr surface oxide scales by using powder spraying kinetic energy to expose pure metal and embed the powder in the welding edge position to form a to-be-welded active layer with gradient distribution; in arc discharge, the burr tip forms a stable arc striking channel to avoid arc running away and cause the thin decorative plate to be burnt through; the embedded powder absorbs excess heat energy by phase change latent heat in the molten pool formed by layer-by-layer melting, thereby reducing the polishing process, and the burrs originally belonging to processing waste are converted into self-melting filler; meanwhile, the internal slag inclusion and opening layering defects in the splicing of dissimilar metal composite plates are radically solved, and the welding firmness between the steel decorative plates is improved.

The invention relates to the technical field of batteries, in particular to a solid-state electrolyte membrane and a preparation method thereof, a solid-state battery and an electric device. The solid electrolyte membrane provided by the invention comprises a lithium-containing solid electrolyte and a composite binder in a mass ratio of (99.2-99.9): (0.1-0.8), the composite binder comprises a first binder and a second binder; the first binder comprises polytetrafluoroethylene; the second binder comprises polyimide, and the polyimide has a structural unit as shown in a formula (I). Wherein each R1 is independently a single bond,-O-,-C (= O)-, an ester group, # imgabs 0 #, # imgabs 1 # or # imgabs 2 #; and L1, L2 and L3 are each independently an arylene group with a carbon atom number of 6 to 12. A ring is selected from a structure shown in a formula (A-1) to a formula (A-6), and R2 is independently H, halogen, alkyl with the carbon atom number of 1-8 or halogenated alkyl with the carbon atom number of 1-8 when appearing each time; m is a positive integer greater than or equal to 1.

This invention discloses a high-density, high-strength "three-layer structure" carbon-based composite material and its preparation method. The method includes: mixing activated coke with a D50 of 3-6 μm and microcrystalline graphite powder with a D50 of 10-60 μm to obtain a mixed powder; kneading the mixed powder in a kneading pan, removing moisture, heating to 160-240℃, then adding a molten binder or modified binder, and simultaneously adding a modifier, followed by kneading with the lid closed; after kneading, pouring the mixture into a rolling mill for rolling, then crushing and sieving to obtain pressed powder; vacuum-treating the pressed powder, then molding and isostatically pressing to obtain green blocks, and finally calcining to obtain the carbon-based composite material. This invention has a short production cycle and low cost. The carbon-based composite material obtained has a one-layer interface structure, a two-layer brazed structure, and a three-layer steel-concrete structure. The special "three-layer" structure design achieves a dual effect of "reinforced aggregate complementarity + micro-active layer construction," which can effectively improve the bulk density, mechanical strength, homogeneity, and stability of the carbon-based composite material.

This invention belongs to the field of all-solid-state lithium battery technology, specifically relating to a sulfide solid electrolyte interface stabilizing modification layer and its preparation method. The invention discloses a sulfide solid electrolyte interface stabilizing modification layer and its preparation method. The interface stabilizing modification layer is a Li3BO3-LiF composite nano-modification layer constructed on the surface of a sulfide solid electrolyte through an in-situ solid-phase reaction. The modification layer is a continuous, dense, crack-free thin film that forms a chemical bond with the sulfide electrolyte substrate. In the Li3BO3-LiF composite modification layer of this invention, Li3BO3 acts as a fast lithium-ion conductor, ensuring efficient lithium-ion transport between the electrolyte and the electrode; LiF, as a highly chemically stable layer, isolates the sulfide electrolyte from direct contact with lithium metal / cathode, completely suppressing interfacial side reactions. Simultaneously, the rigid LiF can physically block lithium dendrite growth, improving battery safety performance.

The application belongs to the technical field of tungsten alloy preparation, and discloses a high specific gravity tungsten alloy and a preparation method thereof, which is composed of the following components in percentage by mass: 88% to 92% of tungsten, 4% to 6% of nickel, 1.5% to 2.5% of iron, 0.05% to 0.2% of zirconium, 0.1% to 0.3% of lanthanum oxide, and the balance of inevitable impurities; the alloy is prepared by using zirconium hydride as a zirconium source, cooperating with lanthanum oxide doping modification, and sequentially passing through powder mixing and ball milling, cold isostatic pressing forming, degreasing, solid phase pre-sintering and liquid phase sintering processes, and does not need additional complex post-treatment. The high specific gravity tungsten alloy has excellent matching of strength and toughness, and the tensile strength and elongation are obviously improved compared with conventional alloys of the same type; tungsten phase grains are small and uniform, and the grain boundary bonding strength is high; the preparation process is safe and controllable, and the cost is low; the high specific gravity tungsten alloy can be adapted to the weight matching, protection and other service requirements of various high-end equipment.

This invention relates to the field of composite material preparation technology, and more particularly to a novel diamond-copper composite process. This process involves vitrifying the surface of diamond micropowder to form a uniform and dense phosphate glass film on its surface. A porous preform is then prepared and subjected to low-temperature pressure-assisted consolidation at 700–850℃ and 30–50MPa under vacuum or an inert atmosphere. This causes the solid copper to undergo plastic rheological filling of the pores. Simultaneously, the phosphate glass undergoes an in-situ interfacial reaction with diamond and copper, forming a continuous gradient interfacial bond from diamond, phosphorus carbon oxides, copper phosphorus compounds to the copper matrix. Finally, the mixture is cooled in a furnace to obtain a dense diamond-copper composite material. Compared to traditional metal plating processes, this invention significantly reduces production costs, lowers energy consumption, and enhances interfacial bonding. It is easily scalable for industrial production and is suitable for fields such as electronic packaging, aerospace, and precision instruments where high thermal conductivity, electrical conductivity, and mechanical properties of materials are required.

This invention belongs to the field of battery separator technology, specifically relating to metal-organic framework (MOF) composite separator coating materials, battery separators, and their preparation methods. The MOF composite separator coating uses a dual-ligand aluminum-based MOF composite material as the matrix, embedding deprotonated ethylenediaminetetraacetic acid (EDTA) coordination groups. The dual-ligand aluminum-based MOF composite material possesses at least a MIL-53-FA phase and a CAU-10-H phase. This invention utilizes the MIL-53-FA and CAU-10-H phases within the dual-ligand aluminum-based MOF embedded EDTA functional coating to provide porous transport channels and abundant framework sites, while EDTA provides multidentate coordination sites. This maintains the separator's good wettability to the electrolyte and ion transport channels, while also enhancing its binding capacity for dissolved metal ions, thereby reducing the migration and deposition of transition metal ions inside the battery, contributing to improved battery cycle life and rate performance.

The invention discloses a preparation method and application of a high-entropy garnet type oxide solid electrolyte film, and relates to the technical field of garnet solid-state lithium battery design. The electrolyte film is prepared by the following steps: dispersing prefabricated Li5.25Ga0. 25La3 (ZrTiTaNb) 0.5 O12 sample powder in an absolute ethyl alcohol solution, spin-coating a silicon substrate with the dispersion liquid, and carrying out high-temperature heat treatment. According to the preparation method and the application of the high-entropy garnet type oxide solid electrolyte thin film, compared with a traditional granite type oxide solid electrolyte sheet, the high-entropy garnet type oxide solid electrolyte thin film is prepared; the high-entropy effect and cocktail effect generated by multiple elements in the high-entropy garnet type oxide solid electrolyte film endow the high-entropy garnet type oxide solid electrolyte film with excellent comprehensive properties such as high room-temperature ionic conductivity, good air stability, low sintering temperature and energy consumption, good interface wettability and lithium dendrite inhibition capability.

The application discloses a surface coating of an induction coil of a medium-frequency welding machine and a preparation method thereof. The surface coating comprises a transition layer and a surface layer. The transition layer is composed of nickel-aluminum, aluminum oxide and coated powder in a weight ratio of 85-90:5-8:5-10. The surface layer is composed of aluminum oxide and potassium silicate in a weight ratio of 94-98:2-6. The coated powder is formed by coating zirconium diboride with calcium fluoride. The thickness of the transition layer is 30-150 microns. The thickness of the surface layer is 200-500 microns. The prepared coating has good bonding strength and insulation performance, and the preparation method is simple and efficient, and is suitable for various industrial applications.

The utility model relates to a liquid metal sheet base material heat-conducting fin which comprises a liquid metal sheet, a first heat-conducting and electric-conducting silica gel layer, a second heat-conducting and electric-conducting silica gel layer and a third heat-conducting and electric-conducting silica gel layer, the first heat-conducting and electric-conducting silica gel layer is attached to the top of the liquid metal sheet, and the second heat-conducting and electric-conducting silica gel layer is attached to the bottom of the liquid metal sheet. And the third heat-conducting and electric-conducting silica gel layer wraps the four side surfaces of the liquid metal sheet. The liquid metal sheet base material heat-conducting fin does not overflow after being heated, and is good in heat-conducting effect and good in shock absorption performance and compression resilience.

The present invention relates to the field of welding materials, and provides a high-temperature resistant and highly conductive tin solder wire and a preparation method thereof, wherein the outer layer of the solder wire is a tin alloy containing dumbbell-shaped nano-Ag particles, Ti2SnC nanosheets and a variety of metal powders, and the inner layer is a special solder flux. The Ag3Sn phase in the alloy is generated in situ by nano-Ag particles and Sn powder at high temperature, uniformly covers the nano-Ag particles, and forms a semi-coherent interface with β-Sn to enhance performance. The solder flux incorporates a variety of components such as carbon nanotubes, rosin, and polyvinyl alcohol loaded with nano-Cu particles to optimize the welding effect. The preparation method is to melt nanomaterials and metal powders to obtain alloys, stir and mix nanoparticles to make solder flux, and then co-extrude the solder wire. The present invention adopts dumbbell-shaped nano-Ag particles to induce the in-situ self-generation technology of Ag3Sn phase, introduces Ti2SnC nanosheets to construct a semi-coherent interface, and combines the synergistic effect of multiple components to comprehensively improve the high temperature resistance, conductivity and comprehensive performance of solder alloys and solders.

The invention provides a composite negative electrode, a preparation method thereof and a solid-state lithium metal battery, and particularly relates to the technical field of lithium batteries. The composite negative electrode comprises a porous polymer substrate, wherein a first functional layer and a second functional layer are oppositely arranged on two sides of the porous polymer substrate; a lithium metal layer is further arranged on the outer side of the first functional layer in the direction far away from the porous polymer substrate; the first functional layer is made of magnesium halide and a lithium-containing compound; and the second functional layer has an interface wetting function. According to the invention, a metal current collector is completely abandoned, and the functionalized substrate is used as a carrier and a current collector, so that the proportion of inactive components is greatly reduced, and the cycle life, coulombic efficiency and mass / volume energy density are effectively enhanced while the interface dynamic performance is improved.