75results about How to "Improve the bonding force between layers" patented technology

The invention relates to the technical field of printing, in particular to a structural member with insulation and heat dissipation functions and a printing process thereof.The structural member comprises a base material layer, a graphite layer and a surface layer which are sequentially arranged from bottom to top, the base material layer is made of PA, and the surface layer is made of PI materials; the lowermost layer is made of a PA material, the middle layer is a graphite film, and the uppermost layer is made of a PI material; due to the excellent insulating and puncture-resistant performance of PA, when PA is in contact with a device conductor, the insulating and puncture-resistant functions can be effectively achieved. By means of the efficient heat conductivity coefficient of the graphite layer, the product has the heat dissipation effect of rapidly diffusing a single-point heat source. And the base material layer and the graphite layer are tightly combined by adopting a thermal compounding technology, so that the integrity of the structure is ensured, the production process is simplified, and the production efficiency is improved.

The invention relates to the field of solar photovoltaic cells, and particularly discloses a short fiber carbon / carbon composite PECVD carrier frame and a preparation method thereof, and the preparation method comprises the following steps: cutting a carbon fiber prepreg into short carbon fibers with different lengths, and mixing the short carbon fibers with different lengths; mixing and ball-milling phenolic resin powder, silicon carbide powder and graphite powder to prepare a ball-milled mixture; mixing the short carbon fiber mixture with the ball-milled mixture, so that the surface of the short carbon fiber is coated with the ball-milled mixture to obtain a composite mixture; the composite mixed material is sequentially subjected to compression molding, heat treatment, carbonization treatment, dipping densification, graphitization treatment and machining, and the short fiber carbon / carbon composite material PECVD carrier frame is prepared; the invention further discloses the PECVD carrier frame made of the short-fiber carbon / carbon composite material and prepared through the method. The preparation method has the characteristic that the prepared carbon / carbon composite PECVD carrier frame has better mechanical properties.

The invention is suitable for the technical field of 3D printing, and particularly relates to a method for producing a CF-PPS wire rod with high heat resistance and high dimensional stability, and the method comprises the following steps: carrying out surface modification treatment on carbon fibers to obtain pretreated carbon fibers; the preparation method comprises the following steps: uniformly mixing polyphenylene sulfide, a glycidyl methacrylate grafted modified ethylene-octylene copolymer flexibilizer and glass beads, and putting the mixture into mixing equipment; putting the pretreated carbon fibers into the mixing equipment; feeding plastic is regulated and controlled to control the content of the carbon fibers, extrusion molding is carried out, granulation treatment is carried out, and the carbon fiber reinforced polyphenylene sulfide composite granules are obtained; and extruding and drawing the carbon fiber reinforced polyphenylene sulfide composite granules by a single screw to obtain the CF-PPS wire. The brittleness of polyphenylene sulfide can be improved, the interlayer bonding force of a printed piece can be improved, the prepared wire rod has the characteristics of being tough and not prone to brittle fracture, and the printed piece is low in shrinkage rate, not prone to warping and good in interlayer bonding performance.

The application belongs to the field of new materials, and discloses a lead-free perovskite X-ray shielding composite material and a preparation method and application thereof, and comprises the following steps: mixing ANF / DMSO dispersion liquid with ethanol to obtain re-protonated ANF dispersion liquid; mixing the re-protonated ANF dispersion liquid, CsI powder and ethanol, and stirring to obtain two portions of the same CsI / ANF dispersion liquid; mixing re-protonated ANF, Cs3Bi2I9 powder and ethanol, and stirring to obtain Cs3Bi2I9 / ANF dispersion liquid; sequentially filtering the first portion of CsI / ANF dispersion liquid, the Cs3Bi2I9 / ANF dispersion liquid and the second portion of CsI / ANF dispersion liquid by using a gel-gel method, and vacuum hot-pressing to obtain a composite gradient film with a biomimetic symmetrical structure, which is used as a lead-free perovskite X-ray shielding composite material; and the application realizes continuous and efficient X-ray shielding effect, and can improve the mechanical flexibility and thermal stability of the material.

The application provides a preparation method of a graphene porous membrane. Through process improvement and control of different process parameters, a porous graphene oxide is formed by hole etching on a raw material graphene oxide cake, and then the porous graphene oxide is pulped and coated to form a membrane to form a nanopore surface. After chemical reduction and foaming, exhaust passages are formed on the surface and the edge, the problem of bulging and delamination caused by untimely exhaust during industrial production is solved, and the interlayer bonding force is improved.

The invention discloses a preparation method of a thickened graphene heat-conducting film. Before splicing, the graphene oxide thin film is clamped by two layers of tight polyester cloth and is soaked in deionized water, so that the surface roughness of the graphene oxide thin film can be improved, and the cohesiveness of the graphene oxide thin film in the subsequent splicing process is effectively improved by utilizing the swelling capacity of graphene oxide in water; and finally, the thickened graphene heat-conducting film with high shear breaking strength is obtained, and the defect of insufficient interlayer binding force in the preparation process of the thickened graphene heat-conducting film in the prior art is overcome.

The invention relates to the technical field of composite films, in particular to a flame-retardant composite film and a preparation method thereof. The composite film is of an ABA type symmetrical three-layer co-extrusion structure, and functional division and synergistic interaction are achieved by concentrating a main flame-retardant function on a core layer (B layer) and distributing hydrolysis resistance and mechanical enhancement functions on a surface layer (A layer). The layer A comprises crystalline polyester, reinforcing master batch and an interface reinforcing agent; the layer B comprises crystalline polyester and composite flame-retardant master batch; the preparation method mainly comprises the following steps: respectively preparing the reinforced master batch and the composite flame-retardant master batch; respectively mixing the raw materials of the layer A and the layer B, drying and melting; co-extruding and casting through a three-layer co-extrusion die head with gradient temperature field control, and quenching a cast sheet; and preheating the cast sheet, and then carrying out synchronous two-way stretching, heat setting and cooling rolling. The film prepared by the invention has excellent halogen-free flame retardance, outstanding damp-heat aging resistance and high mechanical strength, and is suitable for the field with strict requirements on safety and durability.

The invention relates to gradient graphene aerogel as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing graphene oxide and a reducing agent in a solvent to obtain a mixed dispersion liquid; taking a part of the mixed dispersion liquid, and carrying out a first heating reaction to obtain a first layer of graphene hydrogel; adding a part of the mixed dispersion liquid to the first layer of graphene hydrogel, carrying out a second heating reaction to form a second layer of graphene hydrogel on the first layer of graphene hydrogel, and repeating the step to obtain gradient graphene hydrogel; and carrying out freeze drying on the gradient graphene hydrogel to obtain the gradient graphene aerogel. The improved gradient graphene aerogel obtained by the preparation method disclosed by the invention has good integrity, high interlayer binding force and more excellent mechanical properties, and has the characteristics of continuous deformation and discontinuous displacement field on the whole.

The invention relates to a capacitor printing plate and a preparation method of a capacitor, and belongs to the technical field of capacitors. According to the invention, the opposite sides of any two adjacent first cutting line patterns are respectively provided with the first convex part and the first concave part, and the opposite sides of any two adjacent second cutting line patterns are respectively provided with the second convex part and the second concave part, so that the gap accumulation in the laminated structure of the printing sheet can be effectively reduced; therefore, the interlayer binding force of the laminated structure of the printing sheet is improved, the phenomena of delamination and lamination precision deterioration in the subsequent processing process are avoided, and the qualified rate of capacitor products is further ensured.

The present application relates to the technical field of 3D printing, in particular to a processing step and method of a coating process TPU. The present application uses the post-processing technology of the formed part to process the formed part, which not only improves the FDM printing speed by 3-4 times, can realize the successful printing of complex models that cannot be realized in the FDM printing process of TPU, and breaks through the color printing of flexible materials. Moreover, after the processing of the formed part, the interlayer bonding force is greatly increased, and the surface effect is equivalent to the SLA surface fineness. Such a process not only breaks the limitation of 3D printing that can only print single color with special design shoes, but also greatly reduces the printing equipment cost, the formed part printing cost, improves the efficiency, realizes color printing, and more importantly, the printed object can be directly worn. At the same time, the hardness of the formed part of the present application will be maintained at about 70A, which is suitable for printing various wearable products and is suitable for various industries.

This utility model provides a recyclable, biodegradable, and environmentally friendly ink-absorbing needle-punched nonwoven fabric, relating to the field of nonwoven fabric technology. It includes: a nonwoven fabric body; the nonwoven fabric body has a three-layer composite structure, with an upper dense surface layer and a lower dense surface layer, and a middle loose support skeleton. Both the upper and lower dense surface layers are composed of fibers with a diameter of 2 micrometers. A nanofiber cellulose film with a thickness of 8 micrometers is laminated to the surface of the nonwoven fabric body. The nonwoven fabric body has a three-layer composite structure, with upper and lower polylactic acid dense layers (2 micrometers in diameter, each accounting for 20% of the total thickness) controlling ink diffusion and improving strength, and a middle loose support skeleton (6 micrometers in diameter, accounting for 60%, with a porosity of 75%) storing and penetrating ink. The three-dimensional structure is formed by needle punching at 200 needles / cm². The film contains 3% titanium dioxide for UV resistance. Both polylactic acid and nanofiber cellulose are biodegradable materials, suitable for printing, medical, and packaging fields, balancing environmental friendliness, printing performance, and functionality.

The utility model relates to the technical field of fabric compositing, in particular to a composite structure for enhancing fabric compositing strength, which comprises a first unwinding component and a second unwinding component. A first fabric unwound by the first unwinding assembly and a second fabric unwound by the second unwinding assembly sequentially enter the compounding assembly and the drying oven and then are wound by the winding assembly, and the spraying assembly is arranged on the upper side of the first fabric between the first unwinding assembly and the compounding assembly. A first box body is arranged on the lower side of the first fabric between the spraying assembly and the compounding assembly, a first negative pressure opening is formed in the upper end face of the first box body, a second box body is arranged on the upper side of the second fabric between the compounding assembly and the drying oven, a second negative pressure opening is formed in the lower end face of the second box body, and extraction openings are formed in the first box body and the second box body; according to the air suction device, the permeation of an adhesive to the fabric can be effectively enhanced, and the composite strength of the fabric is enhanced.

The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing forming device and method with stirring friction assisted by rotary vibration, and the additive manufacturing forming device with stirring friction assisted by rotary vibration comprises a workbench assembly, a rotary vibration assembly arranged on one side of the workbench assembly, and a feeding system used for providing raw materials; the workbench assembly and the rotary vibration assembly can move relatively. According to the method, by means of the acoustic softening effect of in-situ coupling of rotary vibration with stirring friction assisted by rotary vibration, the thermal effect of stirring friction and the extrusion shearing effect, plastic rheology in the material forming process can be effectively promoted, the forming stress and temperature are reduced, the interlayer binding force is improved, and the mechanical property of the material is improved; and deposition and stacking of metal materials, high polymer materials, biological materials, composite materials and other raw materials in the forms of bars, strips, wires, powder, fluid and the like can be efficiently achieved, and multiple structures can be formed through a certain path in an additive forming mode.

The invention provides a composite cone as well as a preparation method and application thereof. The composite cone comprises a first surface layer, a second surface layer and a core layer arranged between the two surface layers, the ratio of the total mass of the first surface layer and the second surface layer to the mass of the core layer is 1: (0.5-4); the first surface layer and the second surface layer are prepared from wood pulp and / or bamboo pulp; the bulk of the core layer is greater than 2.0 cm < 3 > / g; the preparation raw materials comprise a second plant fiber, cationic polyacrylamide and an optional non-plant-based filler. Through the design and mutual compounding of the two surface layers and the core layer, the composite cone has the advantages of low density, high rigidity, high modulus, high strength, excellent interlayer binding force and excellent acoustic characteristics. When the composite cone is applied to the loudspeaker, the frequency response range of the loudspeaker can be expanded, the high-frequency segmentation vibration of the loudspeaker is suppressed, and the frequency response curve of the loudspeaker is smoother.

The invention relates to the technical field of cables, and discloses a safety early warning cable with a temperature sensing function and a production process thereof.According to the cable, a spiral metal protection tube and a temperature measurement optical fiber are arranged in a conductor to form a core temperature measurement channel, and a redundant temperature measurement system is formed in cooperation with a multi-core sensing optical cable; vibration sources are accurately distinguished by combining two-way vibration sensing and AI signal recognition, and meanwhile, a multi-layer composite isolation layer and a three-dimensional heat conduction network are designed, so that efficient heat diffusion is achieved; according to the production process, the insulation performance of the cable and the stability of the sensing element are improved through a precise temperature control co-extrusion process, an online thermal stress relaxation treatment process and an optical fiber pre-fixing process. According to the invention, the temperature measurement reliability and the vibration identification precision are obviously improved, the cable thermal management capability is optimized, the service life is prolonged, the insulation eccentricity and the pre-crosslinking defect can be effectively reduced by the production process, and the overall quality of the product is improved.

This invention relates to a composite sheet material and its preparation method, a battery pack protective plate, and a vehicle. The composite sheet material includes a first surface layer, a core layer, and a second surface layer stacked sequentially. The first surface layer and / or the second surface layer includes one or more layers of polyamide sheets and one or more layers of fiber fabric, wherein the multi-layer fiber fabric is disposed between the multi-layer polyamide sheets. The core layer includes a metal plate. The polyamide sheets have a melting point of 240–320°C and a shear rate of 1 second at 280–340°C. ‑1 The viscosity under certain conditions is 400–900 Pa·s. One embodiment of the composite board of the present invention uses polyamide sheets and fiber fabrics of specific viscosities as the surface layer and a metal plate as the core layer, thereby improving the interlayer bonding strength between the surface layer and the core layer and significantly enhancing the impact resistance of the composite board.

This application provides an LCP thin film assembly, its preparation method, and its application. The preparation method includes: surface modification of the LCP thin film to obtain an activated surface rich in carboxyl and hydroxyl groups, followed by hot pressing of the LCP thin film with the activated surface; the LCP thin film assembly includes a multilayer LCP thin film bonded by hot pressing, wherein no adhesive is contained between any two adjacent LCP thin films, and the interface region between any two adjacent LCP thin films forms a homogenized molecular-level bonding layer through melt recrystallization; the preparation method of this application introduces active functional groups through surface modification methods such as alkaline hydrolysis and acid activation, achieving interlayer chemical bonding during hot pressing, significantly improving interlayer bonding strength, avoiding the risks of bubbling and delamination, and retaining the inherent excellent high-frequency performance and dielectric properties of the LCP thin film; this preparation method, when applied to the preparation of LCP thin film probe cards, can produce thin film probe cards with excellent interlayer bonding strength and high-frequency performance.

The present invention provides a high-strength composite core paperboard and a manufacturing method thereof. The high-strength composite core paperboard comprises a surface layer, a bottom layer and a core layer located therebetween. The surface layer, the core layer and the bottom layer are bonded together by an adhesive. The bottom layer is made of bottom layer pulp, the core layer is made of core layer pulp, and the surface layer is made of surface layer pulp. The bottom layer pulp comprises OCC pulp and book pulp, the core layer comprises OCC pulp, and the surface layer comprises office waste paper pulp, book pulp, nano filler and cellulase. The present invention ensures good tightness and integrity among the surface layer, the core layer and the bottom layer through the mutual matching of the fibers contained in the surface layer, the core layer and the bottom layer, and the layers are not easy to be delaminated and have a large interlayer bonding force. In addition, nano fillers are added to the surface layer pulp to help fill the gaps between the fibers and enhance the density, strength and smoothness of the surface layer. A small amount of cellulase is also added to the surface layer pulp to remove tiny fiber hairs on the fibers, thereby improving the smoothness and brightness of the surface layer.

The application discloses a method for preparing a composite coating on the surface of a nickel base material by thermal decomposition, which comprises the following steps: sandblasting and ultrasonic cleaning treatment of the nickel base material; coating a precursor solution containing platinum and palladium on the surface of the nickel base material, drying, and then performing thermal decomposition in an air atmosphere; repeating the operation to form a platinum-palladium mixed bottom layer; coating a precursor solution containing ruthenium, cerium and zirconium on the platinum-palladium mixed bottom layer, drying, and then performing thermal decomposition in an air atmosphere; repeating the operation to form a ruthenium-cerium-zirconium composite oxide surface layer; finally, performing annealing treatment in a hydrogen-argon mixed atmosphere, and obtaining the composite coating after furnace cooling. The obtained product comprises a nickel base material, a platinum-palladium mixed bottom layer attached to the surface of the nickel base material, and a ruthenium-cerium-zirconium composite oxide surface layer attached to the surface of the platinum-palladium mixed bottom layer. The bottom layer and the surface layer are sequentially constructed by the thermal decomposition method, so that the coating has excellent adhesion and long-term service stability in a corrosive environment.

The invention relates to the technical field of printing nickel screens, in particular to an acid and alkali resistant high-strength composite printing nickel screen and a preparation method thereof. The composite printing nickel screen comprises a printing nickel screen base body, and a nickel electroplating layer, a chromium electroplating layer and a photosensitive resin layer are sequentially arranged on the surface of the printing nickel screen base body from inside to outside. The photosensitive resin layer is prepared from a polyurethane-acrylate prepolymer and sulfydryl silicon resin through a sulfydryl-olefin click chemical reaction; the preparation method comprises the steps that S1, a core mold is put into a first nickel plating electroplating solution for nickel plating, a nickel net is separated from the core mold, and a printing nickel net base body is obtained; s2, the printing nickel net base body is put into a second nickel plating electroplating solution for nickel plating, and the surface of the printing nickel net base body is covered with an electroplated nickel layer; then plating chromium; and S3, preparing a photosensitive resin layer on the surface of the electroplated chromium layer. According to the invention, the strength, acid and alkali resistance and other properties of the printing nickel screen are comprehensively improved, the application problem of the traditional technology in a severe environment is solved, and a new technical path is provided for the high-performance printing nickel screen.

The embodiment of the invention provides a corrosion-resistant electromagnetic shielding material and a preparation method thereof, the corrosion-resistant electromagnetic shielding material is of a layered structure, and the corrosion-resistant electromagnetic shielding material sequentially comprises a conductive layer, an epoxy wave-absorbing layer and a first corrosion-resistant layer. The first corrosion-resistant layer comprises polyphenylene sulfide resin, epoxy fluorosilane modified graphene, polyether-ether-ketone resin and a dispersing agent. According to the corrosion-resistant electromagnetic shielding material provided by the invention, the polyphenylene sulfide resin is adopted as a matrix and has excellent corrosion resistance, the polyether-ether-ketone resin can improve and relieve the brittleness of the polyphenylene sulfide resin, and meanwhile, the epoxy-fluorosilane modified graphene can construct a continuous conductive network to assist in improving the electromagnetic shielding effectiveness; the graphene sheet layer can form a physical barrier network in a polyphenylene sulfide matrix, corrosion medium permeation is blocked, the corrosion resistance is further improved, a covalent bond can be formed between the epoxy group and the epoxy wave-absorbing layer, the interlayer binding force is improved, and the service life of equipment is prolonged.

The invention discloses a self-adhesion type SBS modified asphalt waterproof coiled material, and relates to the technical field of waterproof coiled materials, the self-adhesion type SBS modified asphalt waterproof coiled material provided by the invention adopts a gradient tire base design, the tensile strength, the tearing strength and the ductility are improved, and the problem of insufficient mechanical properties of a traditional tire base is solved; due to the introduction of the block copolymer interface layer, the interlayer bonding force is remarkably enhanced, the base and the asphalt coating are firmly combined through the chemical bonding effect, the interlayer bonding force is remarkably enhanced, and layering is effectively prevented; the anti-ultraviolet coating and the antibacterial coating delay aging and inhibit mold growth, and the environmental adaptability is improved; the optimized low-modulus asphalt coating enhances the initial adhesion performance at low temperature, meets the requirement of low-temperature construction, and has better durability, stability and construction adaptability.

The invention discloses a method for preparing a layered PEEK composite material used for a compressor valve plate, belonging to the technical field of composite material preparation technology, including the preparation of an inner layer structure PEEK composite material, the preparation of an outer layer structure PEEK composite material and secondary injection molding. The invention adopts PEEK as a base resin, prepares an inner layer structure material with high mechanical strength and an outer layer structure material with excellent corrosion resistance through composite modification, obtains a layer structure through a secondary injection molding process, enables the product to have excellent corrosion resistance while maintaining the high strength characteristics of PEEK.

The invention provides a fiber composite material winding bottle and a preparation method thereof, the fiber composite material winding bottle comprises an inner layer, a middle layer and an outer layer from inside to outside, the inner layer is composed of a nylon fiber composite material layer, the middle layer is composed of a carbon fiber composite material layer, and the outer layer is composed of a carbon fiber composite material layer. The outer layer is composed of a glass fiber composite material layer or a carbon fiber composite material layer. The inner layer, the middle layer and the outer layer of the winding bottle are made of different fiber materials according to the actual requirements of different layers of the winding bottle, and the thermoplastic liner-free hydrogen storage bottle which is high in strength, high in interlayer binding force, high in preparation efficiency and capable of being effectively recycled is prepared.

This invention discloses a method for winding a superconducting magnet, relating to the field of superconducting magnet technology, comprising the following steps: (1) preparing a REBCO tape without a metal protective layer; (2) preparing a metal tube and heating the metal tube; (3) connecting the silver layer of the REBCO tape to the metal tube; (4) clamping the base tape and buffer layer of the REBCO tape, rotating the metal tube, and winding a first coil on the metal tube; (5) stopping the rotation of the metal tube after the first coil has been wound to a set number of turns, and cutting the REBCO tape; (6) repeating steps (3)-(5) to wind a second coil on the metal tube; (7) plating silver on the circumferential outer surfaces of the first and second coils; (8) performing an oxidation annealing heat treatment on the first and second coils. This invention significantly reduces the volume and outer diameter of the superconducting magnet formed by winding the superconducting magnet, resulting in a more compact structure and the ability to generate a higher magnetic field strength.

A biomimetic mother-of-pearl interlocking structure hydrophobic hemp fiber-based radiation cooling membrane and its preparation method are disclosed, belonging to the field of radiation cooling technology. To address the problems of environmentally unfriendly raw materials, high cost, complex preparation processes, and low cooling efficiency in existing radiation cooling materials, this invention provides a preparation technology for a hemp fiber-based biomimetic radiation cooling membrane and a flexible fabric coating. Using industrial hemp recycled fibers as the core green matrix, through synergistic design of material innovation, structural innovation, and process innovation, it comprehensively solves the technical defects of existing radiation cooling materials, providing a new green solution for the large-scale application of radiation cooling technology in multiple scenarios. This radiation cooling membrane, using recycled industrial hemp fibers as the matrix, combines the characteristics of being environmentally friendly, having a biomimetic interlocking structure, and providing high-efficiency radiation cooling. The preparation process is simple and can be mass-produced, meeting the application needs of multiple fields such as building energy conservation, outdoor equipment manufacturing, electronic equipment thermal management, and agricultural greenhouse film control.

This application relates to the field of metal strip composite technology, specifically disclosing a multilayer metal strip composite device. The device includes an unwinding roller for releasing a single-layer strip to be composited; a take-up roller for taking up the composite strip after composited operation, with a composite path defined between the take-up roller and the unwinding roller; a coating roller assembly located downstream of the unwinding roller for applying adhesive to the surface of the single-layer strip; an axial flow fan located downstream of the coating roller for drying the coated single-layer strip; a composite positioning roller located downstream of the fan for aligning the multiple layers of dried single-layer strips; and a composite pressing assembly located between the composite positioning roller and the take-up roller for flattening and hot-pressing the stacked single-layer strips. The coating roller, fan, composite positioning roller, and composite pressing assembly are sequentially arranged on the composite path. This device produces a flatter composite strip with higher interlayer bonding strength and allows for the composite of a higher number of metal strip layers.

The present invention relates to the field of printing technology, and in particular to a structural part with insulation and heat dissipation and its printing process, comprising a substrate layer, a graphite layer and a surface layer arranged in sequence from bottom to top, the substrate layer is made of PA, and the surface layer is made of PI material; the bottom layer is made of PA material, the middle layer is a graphite film, and the top layer is made of PI material; through the excellent insulation and puncture resistance of PA itself, when in contact with the device conductor, it can effectively play the role of insulation and puncture resistance. Relying on the efficient thermal conductivity of the graphite layer, the product has the heat dissipation effect of quickly diffusing a single point heat source. In addition, the thermal composite technology is used to tightly combine the substrate layer and the graphite layer, which not only ensures the integrity of the structure, but also simplifies the production process and improves production efficiency.

The invention provides an aluminum-based silicon carbide composite plate strip, and relates to the technical field of plate strips, a high-temperature transition layer is used for realizing gradient transition of high-temperature resistance and thermal stress, can effectively relieve high-temperature temperature difference stress between a zirconium modified pure aluminum anti-cracking main body layer and the high-temperature transition layer of a plate, and avoids deformation and cracking of the whole structure of the plate due to overlarge cold and hot gradient; the low-temperature buffer layer is matched with the boron fiber enrichment transition layer, so that the high-temperature-resistant strength of the transition area can be further improved, the boron fiber enrichment transition layer is prevented from structural instability at high temperature, the low-temperature buffer layer can realize gradient transition of low-temperature resistance and stress, and the low-temperature shrinkage stress of the lower layer of the plate can be effectively relieved; the temperature-resistant composite main body layer can bear the stress of all upper-layer structures and uniformly disperse the stress to the whole region, stable support is provided for all upper-layer functional structures, meanwhile, the temperature resistance of the temperature-resistant composite main body layer is complementary with the temperature-resistant and low-temperature-resistant structures of all the layers, and finally the comprehensive effects of heat resistance, cold resistance, cracking resistance and protection of the plate are achieved.

The present invention relates to a method for preparing a gas separation membrane by interfacial polymerization and its application. The present invention introduces a high gas permeation flux hydrophobic intermediate layer on the surface of a conventional ultrafiltration membrane, and develops an "oil first, water later" interfacial polymerization preparation method in which the membrane first contacts an organic phase solution and then contacts an aqueous phase solution. Furthermore, a polyvalent organic amine is used as an aqueous phase monomer, and a surfactant and a film-forming reaction regulator are introduced into the aqueous phase, and finally a high-flux flexible polymer is coated on the surface, thereby achieving a significant improvement in the comprehensive performance of the prepared CO2 separation membrane. The CO2 separation performance of the prepared membrane is tested using a mixed gas of CO2 / N2 (15 / 85 vol%) at 25°C, 0.50 MPa, and saturated humidity. The CO2 permeability can reach 491 GPU, and the CO2 / N2 separation factor can reach 42, which has broad application prospects. The present invention lays a foundation for the large-scale preparation and application of high-performance CO2 separation membranes by interfacial polymerization.