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

Laser connection method for metal/carbon fiber reinforced thermoplastic composite material

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.
Owner:HARBIN INST OF TECH AT WEIHAI

Antibacterial hollow fiber membrane, preparation method and applications thereof

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.
Owner:CHINA PETROLEUM & CHEM CORP +1

Preparation method of glass/polymethyl methacrylate (PMMA) micro-nano interface structure laminated material

InactiveCN102659322AIncrease contact areaImproved impact resistance as well as aging and fatigue resistanceGlass/slag layered productsPolymethylhydrosiloxanePrepolymer
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.
Owner:NANCHANG HANGKONG UNIVERSITY

Interlocking type all-solid-state lithium ion battery membrane blank and forming method and forming device thereof

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.
Owner:SOUTH CHINA UNIV OF TECH

Phosphomolybdic acid/polymer/carbon nanotube composite conductive hydrogel, preparation method thereof and application thereof in all-solid-state flexible super capacitor

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.
Owner:TAIYUAN UNIV OF TECH

Phosphomolybdic acid-polymer composite conductive hydrogel, preparation method thereof and application of phosphomolybdic acid-polymer composite conductive hydrogel in all-solid-state flexible super capacitor

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.
Owner:TAIYUAN UNIV OF TECH

Magnetic abrasive and preparation method thereof

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.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY

Perovskite battery model based on TiO2 nanocone array

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.
Owner:SHANXI UNIV

Phosphomolybdic acid-polymer composite conductive hydrogel and its preparation method and application in all-solid flexible supercapacitors

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.
Owner:TAIYUAN UNIV OF TECH

Preparation method of copper-tantalum composite wire with high strength and high conductivity

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.
Owner:NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH

Phosphomolybdic acid/polymer/carbon nanotube composite conductive hydrogel and its preparation method and application in all-solid flexible supercapacitors

The invention belongs to the technical field of multi-acid based composite hydrogel new materials, and provides a phosphomolybdic acid / polymer / carbon nanotube composite conductive hydrogel, a preparation method and an application in an all-solid flexible supercapacitor. Using the positively charged polymer conductive hydrogel as a bridge, the negatively charged phosphomolybdic acid is loaded on the negatively charged acidified carbon nanotubes in one step, and the construction of the ternary composite hydrogel is realized through electrostatic self-assembly. Phosphomolybdic acid nanoparticles are uniformly anchored or embedded on the surface of acidified carbon nanotubes wrapped by a polymer conductive hydrogel with a 3D grid structure. It can be directly used as a binder-free supercapacitor electrode material to realize electrochemical flexible energy storage. Good for PMo 12 The uniform pinning and exposure of reactive sites accelerates electron transport, and the excellent ductility and swelling properties facilitate its application in flexible devices. When bent at a large angle, it shows a very high capacitance retention rate, which shows great practicability in the field of integrated flexible electronic devices.
Owner:山西壹德艺创文化传媒有限公司

Method for reinforcing side slope by utilizing industrial waste in cooperation with soybean urease

ActiveCN114687366AImprove stabilityOptimize the phenomenon of uneven generationSeed and root treatmentGrowth substratesSample plotAgricultural science
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.
Owner:CHINA THREE GORGES UNIV

Novel method for reinforcing concrete pier by implanting prestressed high-performance rib material into surface layer

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.
Owner:HUNAN INSTITUTE OF ENGINEERING
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