63results about How to "Increase the interface contact area" patented technology

A process for performing a chemical reaction between a plurality of chemical reactants in the presence of a catalyst, with at least a first reactant in a liquid phase and at least a second reactant in a gas phase, the first and second reactants mixing at least by interdiffusion. The process comprises supplying the reactants to a passage defined by a first surface and a second surface and optionally moving at least one of the first surface and second surface relative to each other. The reactants their mixture or reaction products form respective boundary layers against the first and second surfaces and the radial spacing between the first surface and second surface is equal to or less than the back-to-back radial thicknesses of the boundary layers.

The invention discloses a preparation method of an all-solid-state lithium battery with high specific energy. The preparation method comprises the following steps: forming pores in coating processes of a positive pole piece and a negative pole piece by using a pore forming agent; rolling the prepared pole pieces, and then, coating a thin-layer polymer electrolyte solution on the surface of one side of each pole piece; and finally, winding or laminating the positive pole piece and the negative pole piece with electrolyte layers at one sides so as to be assembled into an all-solid-state lithiumion battery. Compared with the prior art, the method disclosed by the invention has the advantages that the polymer electrolyte solutions can permeate into the pole pieces through the pores obtained by the pore forming agent, and the interfacial contact area between each pole piece and the polymer electrolyte is larger, so that the ionic conductivity of an electrode material is increased; and theall-solid-state lithium battery prepared by the method has the advantages of low interfacial resistance, high energy density, high stability and safety and the like.

The invention relates to a laser connection method for a metal / carbon fiber reinforced thermoplastic composite material, and belongs to the technical field of metal / carbon fiber reinforced thermoplastic material processing. The invention provides the laser connection method for the metal / carbon fiber reinforced thermoplastic composite material in order to solve the problems of unobvious mechanicalembedment and weak chemical bonding between metal and a CFRTP interface. The laser connection method for the metal / carbon fiber reinforced thermoplastic composite material comprises the following steps of preparing a microstructure on the surface of a metal substrate, generating a micron-order porous metal oxide film on the surface of the microstructure in situ, stacking and fixing a CFRTP plateand a to-be-connected part of the treated metal substrate, and completing laser connection under a certain pressure to obtain a reinforced joint. According to the laser connection method for the metal / carbon fiber reinforced thermoplastic composite material provided by the invention, by regulating and controlling the morphology and the chemical state of the laser connection interface, wetting andspreading of molten CFRTP on the surface of the metal substrate are improved, the metal substrate surface microstructure and the porous film are filled with the molten CFRTP, mechanical embedment is promoted, and chemical bonding formation is increased, so that the bonding strength of laser connection of the metal substrate and the CFRTP plate is improved.

The invention relates to the field of preparation of hollow fiber membranes, particularly to a reinforced hollow fiber membrane, a preparation method and applications thereof. The method comprises: activating fibers in an alkaline solution to obtain activated fibers; impregnating a modification composition in a modification solution by using the activated fibers to obtain modified fibers, carryingout a contact reaction on the modified fibers and a metal salt in a metal salt solution to obtain fibers with nanparticles on the surface, mixing the fibers with nanparticles on the surface and a membrane forming liquid, braiding the obtained mixture to obtain a hollow braided pipe, and molding the hollow braided pipe to obtain the reinforced hollow fiber membrane. According to the present invention, the reinforced hollow fiber membrane prepared through the method has high backwash membrane breaking pressure, can integrate high water flux and high fracture strength, and is suitable for membrane bioreactors.

The invention discloses a steel shell of an alkaline zinc-manganese dioxide cell. The steel shell of the alkaline zinc-manganese dioxide cell comprises a current collector steel shell, wherein the inner wall of the current collector steel shell is coated with a graphene-modified conductive coating, and the thickness of the conductive coating is 0.01 microns to 20 microns. The coverage density and the adhesive property between the conductive coating and the inner surface of the steel shell are improved; the radial resistance of a cell and the interface resistance between an anodal ring and the steel shell are reduced; by using the steel shell of the alkaline zinc-manganese dioxide cell, the high-current discharge performance of the alkaline zinc-manganese dioxide cell is further improved.

The invention relates to a method for producing diffusion couple with powders including the following steps: (1) powder material A is filled in a metal casing which do not diffuse or react with the contacted powder and then is pressed to form a compact; (2) the compact is punched by a die with a diameter which is 4-6 mm smaller than the inner diameter of the metal casing; (3) another powder material B is filled in the holes and then treated by compaction, sintering at a certain temperature, air-cooling to get a diffusion couple. The ring canning diffusion couple produced by compacting powder in the invention utilizes the high shrinkage of the outer powder in the sintering process to provide a interfacial binding force to the powder material of each layer in the jacket, thereby guaranteeing a full integration of the powder in each layer and providing a possibility to the preparation and the interface study of the layered composite powder materials.

The invention discloses a lithium metal cathode, a preparation method thereof, and a preparation method of an all-solid-state battery. The lithium metal cathode comprises a copper foil and a coating wrapping the copper foil and obtained by coating a metal lithium mixture, the metal lithium mixture comprises 50-70 parts of a solid electrolyte A, 20-40 parts of a solvent, 1-3 parts of a dispersant agent, 2-10 parts of a binder by weight and lithium powder; the volume ratio of the lithium powder to the solid electrolyte A is (5-10):1, the solid electrode A in the form of powder comprises at leastone selected from a polymer solid electrolyte and an inorganic solid electrolyte, and the solvent comprises at least one selected from toluene, chlorobenzene, tetrahydrofuran, hexane, acetonitrile and alkenyl carbonate; and the isopyknic equivalent diameter of lithium powder is 1-50 micron. The lithium metal cathode increases the contact area, improves the deposition site, and tends not to causetoo heavy local charging current, and further a dentrite problem tends not to occur, and the practical current density that can be applied to the all-solid-state battery can be improved.

The invention discloses a high-ionic conductance full-solid-state composite cathode piece, a battery comprising the same and a preparation method. The preparation method of the full-solid-state composite cathode piece comprises the following steps: 1. preparation of a high-ionic conduction composite cathode active material CNT@Li2S: successfully coating the CNT with the active cathode material Li2S, and preparing a nano-scale composite cathode material CNT@Li2S by adopting a mechanical chemical method; and 2. preparation of a high-ionic conduction composite cathode piece: mixing the high-ionic conduction composite cathode active material CNT@Li2S, a conductive agent and a binder with an organic solvent, dispersing, and fully stirring, to obtain cathode slurry; by taking aluminum foil as a current collector of the cathode piece, coating the cathode slurry to obtain the high-ionic conduction composite cathode piece. Through the full-solid-state battery provided by the invention, the difficulties that a carbon nanotube is easily clustered, the cycle performance is unstable, and the active cathode materials are unevenly distributed, and the like can be effectively solved.

The invention provides a hollow braided pipe modification method, which comprises: modifying a hollow braided pipe by using a modification solution containing a polyphenol compound and a cross-linkedpolymer. The present invention further provides a hollow fiber film preparation method, which comprises: A, modifying the hollow braided pipe as a support material by using the modification method; B,carrying out mineralization treatment on the hollow braided pipe treated in the step A with a salt solution; and C, carrying out surface coating on the hollow braided pipe treated in the step B witha film forming liquid. According to the present invention, the preparation process is simple, the used raw materials are cheap, and the method is suitable for industrial production.

The invention relates to the field of preparation of hollow fiber membranes, particularly to an antibacterial hollow fiber membrane, a preparation method and applications thereof. The method comprises: (1) activating fibers mixed with silver fibers in an alkaline solution to obtain activated fibers; (2) mixing the activated fibers and a membrane-forming liquid, and weaving the obtained mixture toobtain a hollow fiber weaving pipe; and (3) molding the hollow fiber weaving pipe to obtain the antibacterial hollow fiber membrane. According to the present invention, the antibacterial hollow fibermembrane produced through the method can maintain the high antibacterial property for a long time, and can have the enhanced backwash membrane breaking pressure so as to provide the strong bonding ability between the support layer and the separation layer.

The invention relates to a preparation method of a diamond / aluminum composite material, and belongs to the technical field of microwave technology application and material powder metallurgy. Firstly, diamond particles with particle sizes of 80-150 microns are washed by alkali and roughened, and are added with aluminum powder in a volume ratio of 50-70: 50-30 for uniform mixing to obtain mixed powder; protective gas is filled in the mixed powder for microwave heating to a temperature of 200-300 DEG C with the heating speed of 5-10 DEG C / min under the condition of a pressure of 10-35 MPa for keeping 5 min and for microwave heating to a temperature of 650-750 DEG C with the heating speed of 30-50 DEG C / min for thermal pressure sintering by 0.5-1 h; and after the sintering is finished, the diamond / aluminum composite material is prepared through cooling demolding. The method can simply and efficiently realize industrialized production of the diamond / aluminum composite material with better interface bonding performance, low cost and excellent performance.

The invention relates to the field of composite materials and especially relates to a preparation method of a glass / polymethyl methacrylate (PMMA) micro-nano interface structure laminated material. The preparation method comprises the following steps that 1, polymethylhydrosiloxane and ethyl orthosilicate undergo a hydrolysis reaction under the alkaline conditions to produce silica sol; and the silica sol is coated on the surface of glass to form a silica porous film having aperture sizes of 0.2 to 2mm; 2, a methyl methacrylate monomer, a plasticizer and an initiator are mixed according to a certain ratio and then undergo prepolymerization to produce a PMMA prepolymer; 3, the silica porous film is coated with the PMMA prepolymer and then is subjected to heat treatment in vacuum; and 4, the silica porous film with the PMMA prepolymer undergoes heat treatment polymerization in a high-pressure nitrogen atmosphere to produce the glass / PMMA micro-nano interface structure laminated material. The glass / PMMA micro-nano interface structure laminated material has excellent performances of high transparency, impact resistance, fatigue resistance and aging resistance.

The invention discloses an interlocking type all-solid-state lithium ion battery membrane blank and a forming method and a forming device thereof. The lithium ion battery membrane blank is of an integrated multilayer structure with an integral interlocking structure and comprises a positive pole piece and a polymer solid electrolyte membrane which are connected with each other, and the integral interlocking structure is of a groove-shaped or convex embedded structure formed by superposing multilayer structures. The forming method of the interlocking structure comprises the following steps: co-extruding and forming the polymer solid electrolyte membrane, a cathode active layer and an anode active layer in a co-extrusion manner, and then carrying out tape-casting and hot-pressing forming onthe polymer solid electrolyte membrane, the cathode active layer and the anode active layer with a positive current collector and a negative current collector by adopting an imprinting machine, so asto form the groove-shaped or convex integral interlocking structure while compounding. The device comprises a plurality of extruders, a multi-layer co-extrusion die head, positive and negative currentcollector sleeves and the imprinting machine, the plurality of extruders are jointly connected with the multi-layer co-extrusion die head, and a plurality of grooves are distributed in the surface ofa vacuum forming roller in the imprinting machine. According to the invention, the production period of the lithium ion battery can be effectively shortened, and the structural stability of the lithium ion battery can be effectively improved.

The invention discloses a low-temperature softening organic type heat conducting glue. A nano heat conducting powder body and a bonding agent are mixed to prepare the heat conducting glue; and the weight percent of the nano heat conducing powder body and the bonding agent are: 80 to 85 percent of nano heat conducing powder body and 15 to 20 percent of bonding agent. The nano heat conducing powder body is one of nano scale graphite or nano diamond or the combination of both. The bonding agent consists of low molecular weight polypropylene, silicon oil and stearic acid; and the bonding agent comprises the following components by weight percentage: 10 to 20 percent of low molecular weight polypropylene, 40 to 60 percent of silicon oil and 30 to 40 percent of stearic acid. The heating conducting glue has low cost and high heat conductivity coefficient, can be softened and formed at a softening temperature of 43 to 71 DEG C, and can obviously improve the interface contact area and the heat conductivity between a heat dissipater and a high heating electronic element. The low-temperature softening organic type heat conducting glue has no decomposition, no degeneration, stable performance and no corrosion to electronic elements.

The invention belongs to the technical field of new polyacid-based composite hydrogel materials and provides phosphomolybdic acid / polymer / carbon nanotube composite conductive hydrogel, a preparation method thereof and application thereof in an all-solid-state flexible super capacitor. Positively charged polymer conductive hydrogel is used as a bridge, negatively charged phosphomolybdic acid is loaded on negatively charged acidified carbon nanotubes in situ in one step, ternary composite hydrogel is constructed through an electrostatic self-assembly effect, and phosphomolybdic acid nanoparticles are uniformly anchored or embedded in surfaces of the acidified carbon nanotubes wrapped by the polymer conductive hydrogel with a 3D grid structure. The composite conductive hydrogel can be directly used as an adhesive-free supercapacitor electrode material to realize electrochemical flexible energy storage. Uniform pricking of PMo12 and exposure of reaction active sites are facilitated, the electron transmission is accelerated, and the application of the composite conductive hydrogel in a flexible device is promoted due to excellent ductility and swelling property. When the bending angle is large, an extremely high capacitance retention rate is displayed, and great practicability is displayed in the field of integrated flexible electronic devices.

The invention belongs to the technical field of polyacid group composite new materials, and provides a phosphomolybdic acid-polymer composite conductive hydrogel, a preparation method thereof and application of the phosphomolybdic acid-polymer composite conductive hydrogel in an all-solid-state flexible super capacitor. In the process of one-step in-situ polymerization, the phosphomolybdic acid-polymer composite conductive hydrogel is formed through the electrostatic self-assembly effect and the physical adsorption effect of phosphomolybdic acid with negative electricity and a polymer conductive hydrogel with positive electricity, and phosphomolybdic acid nanoparticles are uniformly anchored or embedded in the surface or interior of the polymer conductive hydrogel with an interconnected 3Dgrid structure; the phosphomolybdic acid-polymer composite conductive hydrogel is directly used as a super capacitor electrode material without an adhesive, and electrochemical energy storage is realized; and electrical conductivity of a composite material is improved through the uniform load of phosphomolybdic acid, uniform pinning of PMo<12> and exposure of reactive active sites are facilitated, electronic transmission is accelerated, and excellent ductility and the swelling property facilitate application of the phosphomolybdic acid-polymer composite conductive hydrogel to a flexible device. When the bending angle is large, the flexible device shows a super-high capacitance retention rate, and great practicability is shown in the field of integrated flexible electronic devices.

The invention discloses a high-load electrode of a solid-state sodium battery and a preparation method and application of the high-load electrode. The high-capacity electrode of the solid-state sodiumbattery is porous / compact composite structure ceramic loaded with an active substance, and comprises a porous / compact composite structure solid electrolyte and an electrode active substance filled inpores of the porous / compact composite structure solid electrolyte; preferably, the porous / compact composite structure solid electrolyte is a solid electrolyte with a vertical porous structure; more preferably, the electrode active material is synthesized in situ and filled in pores of the porous compact composite structure solid electrolyte. According to the high-load electrode of the solid-statesodium battery, the interface contact area of the electrode and the solid electrolyte is increased, the interface impedance is reduced, meanwhile, the active substance load of the electrode is improved, and then the actual specific energy of the battery is improved.

The invention provides a magnetic abrasive and a preparation method thereof, and belongs to the technical field of magnetic abrasive preparation. The preparation method provided by the invention comprises the following steps: carrying out oxidation treatment on silicon carbide to obtain surface oxidized silicon carbide; mixing the surface silicon carbide oxide with a ferromagnetic phase to obtaina mixture; and allowing the mixture to be subjected to heat treatment, to obtain the magnetic abrasive. The bonding strength of the interface between the surface silicon carbide oxide and the ferromagnetic phase in the prepared magnetic abrasive is high, the relative permeability of the magnetic abrasive is high, and the magnetic abrasive has good processability and processing efficiency.

The invention discloses a reactive organic metal hydroxide flame retardant and its preparation method. The organic metal hydroxide flame retardant is obtained through a reaction of terephthalic acid and a metal hydroxide in an organic solvent. The preparation method of the organic metal hydroxide flame retardant comprises the following steps: dissolving terephthalic acid in the organic solvent, adding the metal hydroxide, heating and stirring to carry out a reaction of carboxyl groups and hydroxide radicals of the metal hydroxide in order to generate an organic metal hydroxide flame retardant, and carrying out vacuum pumping filtration, washing, and drying to obtain the finished organic metal hydroxide flame retardant. The molecular structure of the flame retardant contains a carboxyl group and also contains a hydroxide radical, so the flame retardant can be grafted to a high-molecular long chain through the carboxyl group to realize the nature change of the metal hydroxide from an additive flame retardant to a reactive flame retardant.

The invention relates to a perovskite battery model based on a TiO2 nanocone array. The perovskite battery model comprises a glass substrate, a tin oxide fluoride layer, a sub-wavelength TiO2 nanoconelayer, an MAPbI3 photosensitive layer and an Au electrode layer which are sequentially stacked from bottom to top. Through the novel cell structure design, light absorption of the solar cell is improved, the sensitive characteristic of the cell to the incident light angle is improved, charge extraction is improved, and the solar cell can be used as an ultrathin, semitransparent and flexible device.

The invention belongs to the technical field of multi-acid-based composite new materials, and provides a phosphomolybdic acid-polymer composite conductive hydrogel, a preparation method thereof, and an application in an all-solid flexible supercapacitor. In a one-step in situ polymerization process, negatively charged phosphomolybdic acid and positively charged polymer conductive hydrogel are formed through electrostatic self-assembly and physical adsorption, and phosphomolybdic acid nanoparticles are uniformly anchored or embedded in each other. Connected 3D mesh structures on the surface or interior of polymer conductive hydrogels. Directly used as a binder-free supercapacitor electrode material to realize electrochemical energy storage. The uniform loading of phosphomolybdic acid improves the conductivity of the composite material, which is beneficial to the PMo 12 The uniform pinning and exposure of reactive active sites not only accelerates electron transport, but also the excellent ductility and swelling properties facilitate its application in flexible devices. When bent at a large angle, the flexible device shows a very high capacitance retention rate, which shows great practicability in the field of integrated flexible electronic devices.

The invention belongs to the technical field of semiconductor electronic information, and particularly relates to a design and manufacturing method of a high-power ultraviolet LED chip with a vertical structure. The design of the high-power ultraviolet LED chip with the vertical structure is as follows: a sapphire substrate is used as a growth substrate, heteroepitaxial growth is carried out, the whole epitaxial process is completed by using an MOCVD technology, the sapphire substrate is an imaging substrate, namely a PSS substrate, the substrate is specially designed and is of a triangular pyramid structure with the vertex angle of 120 DEG, the light emitting efficiency can be greatly improved, and special surface nano-imprinting and double-layer imaging micro-nano processing greatly improve the radiation power and the light emitting efficiency of the ultraviolet light LED , and improve the current diffusion efficiency and the heat dissipation capability of the chip, so that the manufacturing size of the chip can be increased, the reliability of the purple light LED device is effectively improved, and the method can be suitable for industrial-grade application on a large scale.

The invention discloses an all-solid-state thick-film lithium battery and a preparation method thereof. The battery comprises three core layers of a thick-film positive electrode, a thin-film electrolyte and a thick-film negative electrode, and the thick-film negative electrode is a double-phase lithium alloy or a compound formed by the double-phase lithium alloy and a three-dimensional conductive material. The preparation method of the battery comprises the following steps: firstly printing positive electrode slurry on a positive electrode current collector to prepare a thick film positive electrode, then preparing an electrolyte thin film on the thick film positive electrode through a vapor deposition method, finally preparing a thick film negative electrode through a melting method, and covering a negative electrode current collector to obtain the all-solid-state thick film lithium battery. The battery has relatively high electrode thickness, high monomer capacity and good cycling stability and rate capability.

The invention discloses a preparation method of a copper-tantalum composite wire with high strength and high conductivity. The method comprises the steps of (1) overlapping a pure tantalum foil and ananaerobic copper foil, jointly winding on a central copper rod, and forming a densely arranged winding copper foil-tantalum foil composite; (2) loading the copper foil-tantalum foil composite into acopper sleeve body, vacuum seal welding, and carrying out isostatic cool pressing treatment and hot extrusion processing, so as to obtain an extrusion composite rod; (3) drawing to obtain a compositecore rod; (4) after sizing and cutting, straightening and acid pickling, loading a multi-core bundle into a copper pipe, carrying out hot extrusion and drawing processing, and cooperating with intermediate annealing, so as to obtain the copper-tantalum composite wire with high strength and high conductivity. According to the preparation method of the copper-tantalum composite wire with high strength and high conductivity provided by the invention, the copper foil and the tantalum foil are selected as raw materials, so that the plastic deformation degree of tantalum is greatly reduced, a Cu / Tainterface is remarkably increased, the advantages of the high shear modulus and the high strength of the tantalum are fully played, the mechanical property of the wire is further improved, and the copper-tantalum composite wire with high strength and high conductivity can be applicable to a high field pulse magnet.

The invention relates to the field of metal and plastic connection, and discloses a method for improving the laser connection strength of a metal piece and a plastic piece, and the method comprises the following steps: (1) pretreating the surface of the metal piece; (2) enabling an incident light beam of a laser to correspond to a to-be-processed position of the metal; (3) the laser and the coaxial powder feeder are started to deposit the protruding microtextures on the surface of the metal piece, and the metal piece with the protruding microtextures on the surface is obtained; (4) placing the metal piece with the convex micro-texture obtained in the step (3) above the plastic piece, wherein one side of the convex micro-texture of the metal is attached to the plastic; (5) applying pressure to the joint of the metal piece and the plastic piece; and (6) carrying out laser connection on the metal piece and the plastic piece. The connecting problem that the connecting joint of the metal piece and the plastic piece is low in quality is solved, the conception is ingenious, the design is reasonable, and the adaptability is high.

The invention discloses a method for reinforcing a side slope by utilizing industrial wastes in cooperation with soybean urease, which comprises the following steps: step 1, selecting a high and steep side slope sample plot, removing fallen leaves and broken stone garbage on the slope surface, manufacturing protective cylinders with different diameters according to the conditions of the slope surface, and digging planting holes matched with the protective cylinders; 2, inserting a protective cylinder into the corresponding planting hole, hanging a coconut fiber net around the area where the protective cylinder is located, adding plant seeds into the protective cylinder, and then injecting the ardealite mixture A into the protective cylinder; 3, pouring the soybean urease mixed solution B into the protective cylinder, and after a period of time, spraying a fertilizer solution C; 4, later maintenance is conducted, specifically, maintenance is conducted according to design area conditions and design requirements; the coconut fiber net and the protection cylinder are matched, so that the side slope fixing force is longer and more effective, the coconut fiber net is not prone to moving or sliding through the limiting effect of the protection cylinder, all the materials are low in price, industrial application and popularization are facilitated, and the device has important significance on side slope ecological restoration.

The invention relates to a novel method for reinforcing a concrete pier by implanting a prestressed high-performance rib material into a surface layer, which comprises the following steps of: slotting in a concrete protection layer on the surface of the concrete pier needing to be reinforced, and ensuring that the slotting depth does not exceed 2 / 3 of the thickness of the concrete protection layer; then implanting the high-performance rib materials into the groove, and applying prestress to the high-performance rib materials through a tensioning jack; after the prestress is applied in place, butt-welding the ends of the high-performance rib materials and finally sealing and filling a groove channel with a gel material so as to complete the repair of the surface of concrete. On the premise that the thickness of concrete on the surface layer of the pier is not increased, the grooved area and the non-grooved area on the surface of the pier form a whole, and the embedded pre-stressed rib material of the concrete pier is reinforced. According to the new method, the bearing capacity of the concrete pier with insufficient bearing capacity can be rapidly repaired and improved, the bearing capacity of the concrete pier can be improved to 1.4-2 times of the bearing capacity before reinforcement, wherein the reinforcement effect advantage is obvious, and the reinforcement construction process is simple.