28results about How to "Improve the bonding force between layers" patented technology

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 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 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 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 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 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.

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 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 utility model relates to gypsum board production equipment technical field, concretely relates to a kind of conveying belt structure of preventing slurry adhesion, including conveying belt body, the outer surface of conveying belt body is equipped with multiple limit blocks along circumference direction, and the insert piece is detachably inserted between every two limit blocks;Insert piece includes low surface energy anti-adhesion coating, adhesive reinforcing layer and thermal stability flexible support layer stacked in order from top to bottom.The utility model can solve the problem of maintenance time, cost increase caused by the need for overall replacement when traditional conveying belt anti-adhesion function fails.

The application discloses an organic matter intercalated vanadium pentoxide (V2O5) positive electrode composite material and a preparation method and application thereof, and belongs to the technical field of micro-nano materials and electrochemistry. The application uses V2O5 with a wide source as a raw material, and uses bis(4-nitrophenyl) phosphate, diphenyl phosphate, ethyl phosphate and triethyl phosphate as objects to be inserted into adjacent layers of the V2O5 to serve as a support. The application not only improves the interlayer spacing of the V2O5, overcomes the problem that zinc ions are difficult to be deintercalated in the interlayer of the V2O5 in a cycle process, but also improves the structural stability, and improves the capacity and cycle stability.

The invention relates to a composite metal foil with high peel strength, a metal-clad laminated plate and a battery. The high-peel-strength composite metal foil comprises a base film layer and a metal layer, the metal layer is arranged on at least one side face of the base film layer, a plurality of protrusions are arranged on the side face, close to the base film layer, of the metal layer, the height of the protrusions is 0.5-5 micrometers, the protrusions comprise the first protrusions and the second protrusions, the height of the first protrusions is 1.5-5 micrometers, the height of the second protrusions is 1.5-5 micrometers, and the height of the second protrusions is 1.5-5 micrometers. The height of the second protrusions ranges from 0.5 micrometer to 1.5 micrometers. Wherein the second protrusions are arranged between at least 40% of the adjacent first protrusions. The overall design is beneficial to improving the interlayer binding force between the metal layer and the base film layer, the delamination resistance of the composite metal foil can be improved, the working safety of the lithium battery can be improved, meanwhile, the bonding stability of a circuit and the metal foil can be improved when the composite metal foil is used for circuit manufacturing, and the circuit manufacturing quality can be improved.

The application discloses a blue vitriol oral colon release preparation, a preparation method and application thereof, and belongs to the technical field of medicines, and comprises a blue vitriol granule core, an isolation layer and a colon positioning coating layer; the isolation layer is completely coated on the surface of the blue vitriol granule core; the colon positioning coating layer is coated on the surface of the isolation layer; and the administration mode of the preparation is: releasing through oral administration directly to the colon. The application adopts the above-mentioned blue vitriol oral colon release preparation, the preparation method and application thereof, and solves key problems such as coating defects, drug degradation and insufficient release precision in the colon target delivery of the blue vitriol through a trinity technical scheme of a complete isolation layer, critical colon coating weight increase and a fluidized bed bottom spraying process, so that the active ingredients of the blue vitriol can act on the lesion site in the colon environment in an integrated chemical form and with sufficient dosage, and high-efficiency, safe and stable ulcerative colitis treatment effects are achieved.

The application discloses a fairing and a preparation method thereof. First, a mold is prepared, and then an intermediate layer is prepared as a honeycomb-like structure, which is composed of a plurality of small blocks connected to form the honeycomb-like structure; then, according to different regions of the fairing, an outer skin is laid, metal parts are pre-buried, and a composite core material is laid; the outer skin is reversely wrapped, and at the same time, an inner skin is laid on the composite core material and the metal parts; after covering the mold and heating and curing, the product is cooled and demolded. The preparation method is integrally formed, avoids the limitation of the product being constrained by the size of the tank body, is more easy to prepare large special-shaped product, reduces the weight and increases the effective load, and shortens the manufacturing cycle.

The application discloses an acid-activated regenerated brick-mixed micro-powder-metakaolin geopolymer battery and a preparation method thereof. The geopolymer battery is formed by sequentially stacking and pouring a geopolymer positive electrode layer, a geopolymer electrolyte layer and a geopolymer negative electrode layer. The three layers all comprise regenerated brick-mixed micro-powder and metakaolin. The preparation method comprises the following steps: preparing geopolymer positive electrode layer slurry, geopolymer electrolyte layer slurry and geopolymer negative electrode layer slurry respectively; sequentially pouring the positive electrode layer, the electrolyte layer and the negative electrode layer, and vibrating and standing each layer after pouring according to preset parameters, and arranging copper-plated steel fibers in the whole structure by a magnetic field; and curing and coating the whole structure. The geopolymer battery has excellent conductivity, load capacity and interlayer bonding strength, and the whole structure is stable.

The invention discloses browning liquid for a printed circuit board as well as a preparation method and application of the browning liquid, and aims to solve the problems that the interlayer binding force of the printed circuit board treated by the existing browning liquid is insufficient, and the oxidation rate is not matched with the film forming rate. The browning liquid takes sulfuric acid as a main etching agent, organic acid as an auxiliary etching agent, hydrogen peroxide as a main oxidizing agent and nitrobenzenesulfonate as an auxiliary oxidizing agent, and is matched with functional components such as a buffering agent and a corrosion inhibitor. During preparation, the temperature is controlled to be 25-30 DEG C, the stirring speed is 200-300 r / min, and the materials are added And treatment is performed for 0.5-2 minutes at the temperature of 30-40 DEG Through component synergy, a browning film is compact and uniform, the peel strength is larger than or equal to 5.7 lb / in, layering and board explosion are avoided under thermal stress, the stability of the browning liquid is good, the browning liquid is suitable for precise manufacturing of high-end PCBs, and practicability and industrial value are both achieved.

The application relates to a silicon-based composite negative electrode material and an electrochemical device and an electronic device containing the same, and belongs to the technical field of electrochemical energy storage. The silicon-based composite negative electrode material comprises a core, a first coating layer located on at least part of the surface of the core, and a second coating layer located on at least part of the surface of the first coating layer; the core comprises at least one of silicon-carbon, silicon element and silicon oxide; the first coating layer comprises a polyphenol compound and metal ions; and the second coating layer comprises a cross-linked polymer with an electrochemically active functional group, wherein the electrochemically active functional group is a functional group capable of being decomposed and forming a pore structure under electrochemical reduction conditions. The silicon-based composite negative electrode material has long cycle stability and high initial efficiency.

This invention relates to a composite board, its preparation method, and its application. The composite board comprises a first surface layer, a first adhesive layer, an intermediate layer, a second adhesive layer, and a second surface layer stacked sequentially. The first surface layer and / or the second surface layer comprises one or more polyamide layers and one or more continuous fibers stacked within the one or more polyamide layers. The metal plate comprises a first surface and a second surface, on which a plurality of grooves are formed. The depth of the plurality of grooves is 5–30 μm, and the width is 15–300 μm. One embodiment of the composite board of this invention improves the interlayer bonding strength between the surface layer and the metal plate, as well as the impact resistance of the composite board, by forming a plurality of grooves of a specific size on the surface of the metal plate and providing an adhesive layer.

The invention relates to the field of 3D printing, in particular to a benzoxazine dual-curing photosensitive resin composition for additive manufacturing and a preparation method of the benzoxazine dual-curing photosensitive resin composition. The benzoxazine dual-curing photosensitive resin composition is prepared from the following components in parts by weight: 40 to 70 parts of benzoxazine resin, 5 to 20 parts of polyurethane acrylate, 10 to 30 parts of reactive diluent, 1 to 5 parts of photoinitiator, 0.01 to 2 parts of light absorber, 0.1 to 4 parts of auxiliary agent and 1 to 10 parts of thermal curing agent. By regulating and controlling the crosslinking density of the photopolymer network, the thermocuring conversion rate of the benzoxazine resin is ensured to the maximum extent, so that a high-strength 3D printing molded product is obtained under the condition that a three-dimensional structure is not influenced. The resin composition has wide application prospects in the fields of aerospace, vehicle engineering, machine manufacturing and the like.

The present invention relates to an optical fiber ribbon, which is a component included in a high-density optical fiber cable including high-density optical fibers (which are installed in a limited space such as a conduit line) per unit area to build a large-capacity communication network, in which bonding of optical fibers is maintained to allow the optical fibers to be rolled in a width direction, and which is configured to achieve an optimal separation force on each bonding region in a longitudinal direction of the optical fibers and a direction perpendicular to the optical fibers, thereby improving workability in splitting or connecting the optical fiber ribbon and preventing inadvertent separation of the optical fibers of the optical fiber ribbon during the manufacture of the optical fiber cable.

The application belongs to the technical field of haematococcus pluvialis separation, and specifically discloses a ternary cross-linked nanofiltration membrane, a preparation method and application. The nanofiltration membrane comprises a polyethersulfone ultrafiltration membrane base film, a polydopamine intermediate layer and a ternary cross-linked functional layer sequentially loaded on the surface of the polyethersulfone ultrafiltration membrane base film. The preparation method comprises the following steps: preparing the polydopamine intermediate layer, anchoring oxidized haematococcus pluvialis polysaccharide, covalently cross-linking polyphenylated chitosan, coordination cross-linking iron ions, and post-treatment to obtain the ternary cross-linked nanofiltration membrane. The ternary cross-linked nanofiltration membrane is used for separating haematococcus pluvialis polysaccharide and astaxanthin ester. The ternary cross-linked functional layer simultaneously has three separation abilities of size screening, charge regulation and coordination selection, realizes selective separation of astaxanthin ester and neutral oil with similar molecular weights, and effectively retains macromolecular polysaccharide.

The application discloses a kind of fiber metal laminates with microcapsule self-repairing layer and its preparation method, including metal matrix layer, interface reinforcement film layer and fiber prepreg layer, the fiber metal laminates also include microcapsule coating, and the layer plate adopts the structure of metal matrix layer / interface reinforcement film layer / microcapsule coating / fiber prepreg layer / microcapsule coating / interface reinforcement film layer / metal matrix layer for alternative lay-up.It is proposed that the new lay-up structure of fiber metal laminates is coated with a layer of microcapsule coating containing microcapsules between the interface reinforcement layer and the fiber prepreg.The microcapsule coating contains a suitable mass fraction of microcapsules, wherein the microcapsules are well mixed in the microcapsule coating and do not penetrate into adjacent layers, can produce self-healing effect, realize self-repairing function, and improve the shear strength and interlaminar adhesion of the fiber metal laminates.