224 results about "Interface bond" patented technology

The invention discloses an epoxy resin tack coat oil material suitable for a steel bridge deck, which constructs a multi-scale toughening composite system through the synergistic effect of an epoxy-terminated polyurethane elastomer toughening agent (molecular-scale chemical grafting) and a nano-scale elastomer filler (nano dispersion toughening), and solves the problem of rigidity-flexibility imbalance of the traditional epoxy tack coat oil. The material has the advantages of fast curing (surface drying at 25 DEG C is less than or equal to 4 hours), high toughness (the elongation at break is greater than or equal to 250%) and excellent weather resistance (the performance retention rate is greater than or equal to 85% after ultraviolet aging for 500 hours), and is suitable for interlayer interface bonding of steel bridge deck pit slot and crack repair. According to the preparation method, uniform dispersion and interface chemical bonding of the nanofiller are achieved through a segmented stirring process, the comprehensive performance of the material is remarkably improved, and the important engineering application value is achieved.

The invention discloses a high-resilience eTPU foaming material and a preparation process thereof, and belongs to the technical field of foaming materials. The process comprises the steps of raw material premixing and TPU chain extension reaction, precursor system injection, in-situ phase change energy storage core-shell particle generation, supercritical two-fluid foaming and molding post-treatment. Wherein the SiO2-coated TiO2 core-shell particles are prepared by a non-hydrolytic sol-gel method, the porous SiO2 core adsorbs and fixes the micro-crosslinked polyurethane-based phase change material, the TiO2 shell provides sealing and supporting, the particles are combined with the TPU matrix through covalent bonds, and the micro-crosslinked polyurethane-based phase change material has a unique micro-crosslinked network structure, so that the thermal conductivity of the TPU matrix is improved, and the thermal conductivity of the TPU matrix is improved. The hidden danger of leakage of the phase change material in the using process can be effectively eliminated, and meanwhile the interface bonding effect between the inorganic particles and the TPU matrix is synchronously enhanced. The eTPU foaming material prepared by the invention has the characteristics of high resilience, strong interface bonding, excellent energy storage stability and low compression set, and is suitable for shoe materials, automotive interiors and other scenes.

The invention provides a titanium steel composite plate welding interface bonding force detection method, and relates to the technical field of quality detection.The method comprises the steps that scanning is conducted from the steel substrate side of a composite plate through a single crystal normal probe, and whether an interface has a disconnection area or not is judged by analyzing the amplitude relation between interface echoes and bottom surface echoes; defining a 180-degree arc-shaped scanning path taking the explosive welding direction as a 0-degree reference axis on the surface of the composite board which is judged to be completely combined, and equally dividing the arc-shaped path into four monitoring arc sections; in each monitoring arc section, a water immersion type ultrasonic detection device is adopted, a probe is focused on the steel-titanium bonding interface, scanning is carried out along an arc-shaped scanning path, and interface ripple C scanning imaging pictures of the four monitoring arc sections are obtained respectively. According to the method, through ultrasonic detection and analysis, precise detection of the welding interface of the titanium-steel composite plate from disconnection area screening to bonding strength evaluation is achieved, interface defects can be effectively recognized, and the welding quality reliability is improved.

The invention relates to a high-temperature-resistant polymer binder and a preparation method thereof. The binder is composed of a mixture of resin containing a siloxane unit polyimide main chain and an epoxy group side chain and tannic acid. Wherein the main chain containing siloxane and imide units endows the adhesive with excellent heat-resistant stability, excellent processability and excellent adhesion with glass and ceramic materials, and the adhesive can be cured at room temperature through the epoxy side group; the mixed tannic acid can form strong interface bonding with a polymer film and a metal material through a multiple hydrogen bond network, so that the tannic acid has important application prospects in the fields of semiconductor packaging, thermal interface materials and the like.

The invention relates to the technical field of bridge load tests, and provides a bridge load test crack increment change observation method and system, and the method comprises the steps: collecting prestressing tendon circumferential strain distribution data and dual-wavelength strain response data; calculating an interface bonding stiffness change parameter; pre-stress modulation effect compensation and polar coordinate system conversion are carried out on the strain response data and the rigidity change parameters, and micro-crack characteristic signals are obtained; load data and beam group arrangement parameters are collected, and a micro-crack propagation prediction model is established in combination with the interface bonding stiffness change parameters; inputting the micro-crack characteristic signal into a micro-crack propagation prediction model, and outputting a micro-crack development trend prediction result; and adjusting sampling parameters of a dual-wavelength time division multiplexing algorithm and characteristic extraction parameters of prestress modulation effect compensation according to a micro-crack development trend prediction result. According to the invention, the precision of observing the increment change of the micro-crack in the bridge load test is improved, and the automatic monitoring and prediction of the micro-crack of the prestressed concrete bridge are realized.

The invention discloses a method, a device and equipment for determining interface bonding energy of a laser sintering film and a medium. In the scheme, each film sample is prepared in advance through different laser parameters, and a power exponential function prediction model is generated according to the interface bonding energy and temperature energy ratio of each film sample; when the interface bonding energy of the thin film generated by sintering based on the new laser parameters is evaluated, the temperature energy ratio is obtained only by utilizing to-be-evaluated laser parameter simulation, and then the temperature energy ratio is input into the power exponential function prediction model, so that the interface bonding energy of the thin film under the new laser parameters can be obtained. Visibly, since the temperature energy ratio and the interface bonding energy have extremely strong power exponential function correlation, when the interface bonding energy is determined, multiple tests are not required to be executed, and the interface bonding energy can be quickly and accurately predicted only by determining the temperature energy ratio under the new laser parameter through simulation, so that the optimal laser parameter is found, and the accuracy of the interface bonding energy is improved. The research and development period is greatly shortened; the cost is reduced.

The invention provides an inner hole plasma spraying high-bonding-strength bonding layer and Y2O3 coating material and a preparation technology thereof. The bonding layer comprises a middle transition layer formed after Si and C on the surface of a graphite matrix are subjected to a chemical reaction. The inner hole plasma spraying high-bonding-strength bonding layer provided by the invention is composed of a silicon carbide transition layer generated by in-situ reaction of molten silicon and carbon on the surface of a graphite matrix, and can form a Si-O-M bridged bond with a subsequent ceramic coating, so that interface bonding is converted into chemical bonding from mechanical anchoring, and the bonding strength is improved. And meanwhile, by utilizing the thermal expansion characteristic of silicon carbide between graphite and ceramic, the purposes of buffering thermal mismatch stress step by step on the atomic scale, blocking high-temperature diffusion of carbon elements and endowing the coating with lasting high bonding strength and thermal cycling stability are achieved.

The invention discloses a coating technology of a self-cleaning glass coating, which adopts a water-based paint containing nano TiO2 / SiO2 hybrid sol (core-shell structure), a polyurethane modified silane coupling agent and a flatting agent, and forms a 150-300nm super-hydrophilic coating (the contact angle is less than or equal to 5 degrees) on the surface of glass through a synergistic process of gradient curing (three-stage heating at 80-150 DEG C) and ultraviolet radiation (a main wave band of 365nm and an auxiliary wave band of 280-320nm). The technology breaks through the bottleneck that low-temperature curing and high adhesive force are difficult to be compatible, and the contact angle of the coating is still lt after damp-heat aging; 10 degrees, the light transmittance loss lt; and 3%, the photovoltaic module is suitable for building curtain walls, automobile windshields and photovoltaic modules. The method comprises the following steps: (1) bonding a polyurethane chain segment with a mechanical interlocking enhanced interface through a hydrogen bond; (2) the SiO2 shell layer improves the TiO2 quantum efficiency; and (3) equipment zoned humidity control and inert atmosphere oxidation inhibition are realized, and unification of self-cleaning performance, optical performance and mechanical durability is realized by an environment-friendly process.

The invention belongs to the technical field of carbon fiber surface treatment, and particularly relates to a cross-linked polymer modified carbon fiber, a preparation method and a composite material. Aiming at the problem of insufficient interface bonding force between the existing polyarylsulfone / ketone thermoplastic sizing agent and the carbon fiber, the core of the invention is to apply a polyarylsulfone / ketone derivative of which a main chain or a side chain is provided with an electrochemically crosslinkable active group to the technical field of carbon fiber surface treatment. And constructing a covalent bond combined three-dimensional network structure coating on the surface of the carbon fiber in situ. According to the method, firm anchoring of the coating and the carbon fibers is achieved, and the interface load transmission efficiency and the interlayer shear strength of the carbon fiber / polyether-ether-ketone composite material can be remarkably improved. The method is mild in process condition, easy in parameter control and convenient in post-treatment, meets green manufacturing requirements, and has remarkable large-scale production advantages.

The invention provides a reflecting mirror gradient curing bonding device and bonding method based on in-situ deformation correction, and belongs to the technical field of optical precision manufacturing. According to the method, the problems of interface thermal stress mismatch and interface bonding dynamics defects existing in a traditional bonding and curing process are solved. The device comprises a temperature control box, a control center, and an industrial camera, a laser interferometer, a first position adjusting mechanism, a second position adjusting mechanism, a positioning clamping mechanism, a force-heat coupling regulation and control module and a gluing mechanism which are arranged in the temperature control box and are in signal connection with the control center. The compound temperature control assembly and the piezoelectric ceramic actuator are controlled to act through the regulation and control main body, the curing temperature of the adhesive layer is controlled through the compound temperature control assembly, and compensation force is applied to the reflector through the piezoelectric ceramic actuator. The method is used for curing and bonding the reflecting mirror and the reflecting mirror bracket.

The invention relates to the technical field of underground building foundation reinforcement and leakage prevention, in particular to an underground building foundation reinforcement and leakage prevention integrated device and method.The device comprises a movable rack, and a jolt ramming mechanism and an air drying mechanism are installed on the movable rack; the primarily-coated coating is impacted and compacted through the first compaction block and the second compaction block, the waterproof coating is powerfully pressed into holes in the inner wall of the foundation pit, a deeply-fused tight bonding layer is formed, and the interface bonding force and adhesive force between the waterproof coating and the inner wall of the foundation pit are greatly enhanced in the process; and the defect of insufficient bonding strength in the prior art is effectively overcome, so that the phenomena of peeling, cracking and overall falling of the waterproof coating in the later period are fundamentally prevented.

The invention belongs to the field of structural adhesives, and particularly relates to an ultrahigh-strength epoxy structural adhesive for a wind power mixing tower and a preparation method of the ultrahigh-strength epoxy structural adhesive. The ultrahigh-strength epoxy structure adhesive for the wind power mixing tower comprises the following raw materials in parts by weight: 45-55 parts of an epoxy resin matrix, 8-12 parts of a curing agent, 18-22 parts of a toughening agent, 13-17 parts of filler and 4-6 parts of a coupling agent. The ultrahigh-strength epoxy structure adhesive for the wind power mixing tower has excellent mechanical performance, aging resistance and fatigue resistance, the epoxy resin matrix and the curing agent can be subjected to a cross-linking reaction to form a three-dimensional network structure, the toughening agent can improve the toughness and impact resistance of the material, and the curing agent can be used for curing the ultrahigh-strength epoxy structure adhesive for the wind power mixing tower. The filler can further improve the strength and wear resistance of the material, and finally the coupling agent improves the interface bonding force of the material. The preparation method disclosed by the invention is simple to operate, convenient to construct and beneficial to large-scale popularization.

The invention discloses a toughening forming method of a high-performance PEI plate for a high-heat-resistance structural part, and particularly relates to the technical field of high-performance composite material forming. Pre-embedding a PEI toughening layer between thermosetting prepreg layers, and controlling the temperature, the pressure, the pressure maintaining time and the heating rate in the hot pressing process; carrying out infrared spectrum or solid nuclear magnetic resonance testing on the interface area sample subjected to hot press molding, and calculating the chain segment residual rate Rp; determining the interface penetration depth Di through a transmission electron microscope in combination with energy spectrum analysis; inputting the Rp and the Di into an interface coupling model, and outputting an interface combination quality factor Q by the model in a form of combining weighted linearity and logarithmic functions; the interface bonding grade is judged according to the Q value, and when the Q value is lower than a threshold value, hot-pressing process parameters are backtracked for optimization; according to the method, quantitative evaluation of the interface performance and process closed-loop optimization are realized, and the interface bonding strength and service reliability of the composite material can be effectively improved.

A durable composite anticorrosive coating for a concrete structure of a road in a cold region belongs to the technical field of building materials, and adopts the specific scheme that the composite anticorrosive coating comprises an inner coating and an outer coating, the inner coating is coated on a concrete base surface, the outer coating is coated on the inner coating, and the outer coating is coated on the outer coating. The inner coating is a single-component epoxy resin interface bonding layer, and the outer coating is a single-component MMA resin sand-containing anti-corrosion layer. Through the composite structure design of the epoxy resin interface bonding layer and the MMA resin sand-containing anti-corrosion layer, the advantages of high permeability and strong bonding characteristics of epoxy resin and the advantages of rapid curing, high wear resistance, wide temperature range (still keeping toughness at-40 DEG C) and good weather resistance of MMA resin are fully played, and the efficient and lasting protection effect is achieved.

The invention relates to the technical field of coating preparation, in particular to a niobium alloy surface thermal spraying coating, a preparation method and application, according to the method, a silicide coating is prepared on the niobium alloy surface, halide reaction embedding siliconizing treatment is conducted, and the niobium alloy surface thermal spraying coating is obtained; the silicide coating is prepared on the surface of the niobium alloy through the thermal spraying technology, the rough surface can be formed, anchoring sites are provided for follow-up halide reaction embedding siliconizing treatment, in the follow-up halide reaction embedding siliconizing treatment process, silicon is diffused to a base body to react to form a siliconizing diffusion layer, and metallurgical bonding of a coating-base body interface is achieved. In addition, a continuous transition area is formed between the siliconizing diffusion layer and the silicide coating, stress concentration caused by component mutation is reduced, the risk of interface cracking is effectively reduced, the service life of the coating is prolonged, and the problems that in the prior art, the interface bonding force between a thermal spraying MoSi2-based silicide coating and a base body is poor, and the service life is short are solved.

The invention provides a two-section type sole structure, a preparation process thereof and a shoe with the two-section type sole structure, and belongs to the technical field of shoemaking. The two-section type sole structure comprises a front-section foaming outsole, a rear-section foaming outsole and a middle rubber connecting piece for connecting the front-section foaming outsole and the rear-section foaming outsole; and the front section foaming outsole and the rear section foaming outsole are provided with lap joint surfaces in lap joint areas with the middle rubber connecting sheet. By optimizing the hardness, the thickness and the lap joint process of the middle rubber connecting piece, the deflection resistance and the interface bonding durability of the bending area are effectively improved.

The invention belongs to the field of polymer composite materials, and discloses an antistatic composite material for a safety helmet and a preparation method of the antistatic composite material. Comprising the following components: 70 to 90 parts of a PC / ABS blending matrix, 12 to 20 parts of basalt fiber treated by a titanate coupling agent NDZ-311, 4 to 8 parts of a graphene quantum dot modified carbon nanotube-polyethylene glycol composite antistatic agent, 3 to 6 parts of polyaryletherketone micro powder, 0.2 to 0.6 part of an antioxidant 1010 and 0.4 to 1.0 part of calcium stearate. Wherein the mass ratio of PC to ABS in the PC / ABS blended matrix is (6: 4)-(7: 3); the invention aims to solve the problems that in the prior art, a single antistatic agent is difficult to consider the antistatic effect and the mechanical property, or materials are embrittled due to high addition amount, or the antistatic property fluctuates along with the environment and is easy to lose due to low addition amount; the interface bonding force between the conventional reinforced fiber and the PC / ABS matrix is weak, and the mechanical strength is limited to be improved; the long-term aging resistance of the material is poor, and the long-term use requirements of outdoor, chemical and other severe environments cannot be met.

The present invention discloses a high-strength silicon nitride ceramic material and a preparation method thereof, relating to the technical field of ceramic materials and their preparation. The high-strength silicon nitride ceramic material comprises a material layer, a coloring layer, a transition layer and a diamond coating from bottom to top. The ceramic material of the present invention achieves the comprehensive properties of lightweight, high strength and toughness, superhard wear resistance, efficient heat dissipation and corrosion resistance through carbon fiber reinforced phase interface modification, gradient TiCN transition layer design and diamond coating laser microstructuring, and improves the mechanical properties and interface bonding stability of the material. At the same time, it supports multi-color customization, such as black, bronze and yellow. The diversified selection expands the decorative and functional application scenarios of the material. In addition, the introduction of polishing equipment and laser microstructuring technology in the preparation process further optimizes the surface quality and wear resistance, so that the ceramic material has high strength and toughness, corrosion resistance and process controllability.

The utility model relates to the technical field of composite material preparation, in particular to a thin-wall composite material plate structure with a hollow runner inside, which is formed by co-curing an upper composite material panel, a lower composite material panel and a runner layer clamped between the upper composite material panel and the lower composite material panel through resin, the problems that in a traditional technology, a flow channel is prone to being blocked, and interface bonding is weak are solved, and the heat pipe has the advantages of being good in structural integrity, excellent in sealing performance, light in weight and high in strength and is particularly suitable for heat management structural parts in the fields of aerospace, new energy automobiles, high-end equipment and the like.

The invention discloses a preparation method of a ceramic reinforced metal matrix composite material based on atomic layer deposition coating. The preparation method comprises the following specific steps: 1, pretreatment of ceramic particles: surface cleaning, roughening treatment and surface activating treatment; 2, ceramic particle surface atomic layer deposition coating: preheating, precursor gas introduction, inert gas purging, oxygen source supply, inert gas secondary purging, cooling and annealing; and 3, preparation of the ceramic reinforced metal-based composite material: preparing a honeycomb-shaped ceramic prefabricated body, and pouring molten metal to obtain a ceramic reinforced metal-based composite material product. The atomic layer deposition technology is utilized, Al2O3, Ni or TiO2 films are deposited on the surfaces of the ceramic particles to improve the interface bonding force between the ceramic particles and the matrix, the surface films are uniform and compact, meanwhile, the thickness of the films can be accurately controlled, the wettability between the ceramic particles and the metal matrix is effectively improved, and the ceramic particles can be prepared. And the interface bonding force between the metal matrix and the ceramic particles is obviously improved.

The invention discloses a cutter composite coating, a preparation method and a cutter, and relates to the technical field of material surface treatment. An AlTiTaN base serves as a base layer attached to a tool base body, a tetrahedron amorphous carbon film layer serves as a functional top layer, and a transition layer with the AlTiTaN base / carbon element proportion gradually changing is arranged between the base layer and the top layer and serves as a supporting and combining part. The problem that in the prior art, due to the fact that the interface bonding force between a tool base body and a strengthening coating is weak, and the internal stress is large, the service life of a tool is short or the machining quality of the tool is poor is effectively solved. Besides, an innovative low-temperature deposition process is further developed for the coating, temperature contradiction in the deposition process is effectively coordinated, firm combination with the top layer can be achieved on the premise that the performance of the AlTiTaN base layer is not sacrificed, and the service life of the AlTiTaN base layer is prolonged. Therefore, the comprehensive performance coating with ultrahigh wear resistance, excellent lubricity, high bonding strength and long service life and the corresponding cutter are obtained.

The invention discloses a high-temperature-resistant polycrystalline wire-drawing die and a preparation method thereof, and relates to the technical field of wire-drawing dies, the die comprises a boron carbide whisker reinforced silicon carbide ceramic matrix, a modified composite polycrystalline working layer and a titanium carbide-tungsten carbide-cobalt multiphase gradient transition layer between the boron carbide whisker reinforced silicon carbide ceramic matrix and the modified composite polycrystalline working layer; the working layer contains coarse and fine graded diamond particles, tungsten carbide-titanium carbide composite particles and a rare earth modified cobalt-nickel alloy binding agent. The preparation method comprises the steps of matrix preparation, pretreatment, gradient transition layer spraying, rare earth modified binding agent preparation, polycrystalline material mixing, compression molding and step-by-step sintering. According to the invention, the matrix toughness is enhanced by the whiskers, the wear resistance and high temperature resistance of the working layer are enhanced by the graded particles and the modified binding agent, and the interface combination is optimized by the gradient transition layer, so that the problems of fragile matrix, easy damage of the working layer and easy stripping of the interface of the traditional mold are solved, the overall service performance of the mold is obviously improved, and the mold is suitable for industrial production.

The invention discloses a preparation method of a voltage-breakdown-resistant anticorrosive functional filler, and belongs to the field of preparation of coating fillers. The boron nitride nanosheet is subjected to surface amination modification, then zinc molybdate grows in situ, finally, ester compound hydrolytic condensation is utilized for surface treatment, and the composite filler with multiple functions of physical shielding, efficient insulation and active corrosion inhibition is successfully constructed. According to the method, not only can the dispersity and interface bonding force of the filler in the resin be effectively improved and the defects of the coating be reduced, but also the insulation barrier characteristic of boron nitride and the electrochemical anti-corrosion effect of zinc molybdate can be synergistically exerted, so that the long-term corrosion resistance and high-voltage electric breakdown resistance of the coating in a severe environment can be remarkably enhanced.

The present invention discloses a BFRP strip reinforced large-diameter thermoplastic pipe, which comprises, from the inside to the outside, an inner lining layer, a reinforcement layer, an outer cladding layer and stiffening ribs in sequence. The reinforcement layer is in the form of a strip and is wound around the surface of the inner lining layer, and the stiffening ribs are spaced apart on the surface of the outer cladding layer. The inner lining layer and the outer cladding layer are both made of short-fiber reinforced high-density polyethylene materials. The reinforcement layer is a BFRP strip; and the stiffening ribs are spaced apart on the surface of the outer cladding layer. This thermoplastic pipe can improve the stiffness, strength and durability of large-diameter (≥4000mm) water pipelines. The interface bonding performance between the short-fiber reinforced HDPE layer and the BFRP strip is excellent, which avoids interface peeling between the HDPE layer and the reinforcement layer during long-term use. In addition, the use of BFRP strips as a reinforcement skeleton fully utilizes the excellent creep resistance of basalt fiber composite materials, ensures the stability of the reinforcement layer during long-term use, and avoids safety hazards of the pipeline caused by failure of the reinforcement layer.

The invention discloses a strong interface bonding wear-resistant polyurethane floor coating as well as a preparation method and application thereof, and relates to the technical field of floor coatings. The invention relates to a strong interface bonding wear-resistant polyurethane floor coating which comprises the following components in parts by weight: an interface strengthening component; a wear-resistant film-forming component; an auxiliary agent component; the interface strengthening component comprises 8-12 parts of interface bridging microspheres and 7-13 parts of an auxiliary compatilizer. According to the invention, the interface bridging microspheres are introduced to construct a physical-chemical synergistic strong interface, and the gradient wear-resistant filler and a compact cross-linked network are matched, so that the problems that the interface bonding of the floor coating is weak, the filler is easy to fall off and the low-temperature curing is difficult are fundamentally solved; the prepared coating shows excellent adhesive force retentivity, ultrahigh hardness and wear resistance, excellent chemical resistance and wide temperature range construction adaptability, the comprehensive performance is remarkably improved, and the long-acting protection requirement of a harsh industrial environment is completely met.

The application discloses a sintered neodymium-iron-boron composite coating with high bonding force and high hydrogen resistance and a preparation method thereof. The method comprises the following steps: (a) substrate pretreatment, wherein surface oxides are removed by energy gradient plasma sputtering cleaning; (b) sputtering an Al layer under an Ar atmosphere and oxidizing under O2 plasma assistance, thereby generating an intermetallic compound anchoring layer of FeAl3 / NdAl2 with a thickness of 1.0-1.5 nm in situ; (c) sequentially depositing 6 layers of Al2O3 layers to form an alternating stack with a total thickness of 20-30 nm, wherein the first, third and fifth layers are prepared by directly sputtering an Al2O3 ceramic target, and the second, fourth and sixth layers are prepared by first sputtering an Al layer and then completely converting by O2 oxidation; (d) low-temperature annealing to fully form Al-O-Fe bonds at the interface; and (e) cooling to room temperature. The application adopts a multi-dimensional in-situ closed-loop monitoring system to realize accurate process control, and is suitable for surface protection of sintered neodymium-iron-boron permanent magnets in hydrogen energy equipment.

The utility model relates to a glass fiber reinforced polyethylene composite pipe. The problems that in the prior art, polyethylene is poor in affinity and compatibility, good interface bonding cannot be formed when the polyethylene and the polyethylene are compounded, and the mechanical property is poor are solved. The cable comprises a rigid inner layer, a positioning outer layer is arranged on the outer side of the rigid inner layer in the circumferential direction, a polyethylene flexible middle layer is arranged between the rigid inner layer and the positioning outer layer, and an inserting structure is arranged between the inner side of the polyethylene flexible middle layer in the circumferential direction and the outer side of the rigid inner layer in the circumferential direction. And the circumferential inner side of the positioning outer layer is arranged in the polyethylene flexible middle layer in a penetrating manner and is connected with a positioning locking structure of the inserting structure. The glass fiber reinforced plastic pipe fitting has the advantages that the structural strength is high, the impact resistance effect is good, the toughness of the pipe fitting is improved, good interface bonding can be formed between the glass fiber interlayer and the rigid inner layer, mutual entanglement and interlocking among molecular chains are formed, damage and deformation caused by the fact that polyethylene molecular chains are prone to diffusion in a long-term high-temperature environment are avoided, and the mechanical property is good.

The invention relates to the technical field of printed circuit board manufacturing, in particular to a thermal interface bonding method of a copper-clad laminate, which comprises the following steps of: 1, cleaning the surfaces of a copper foil and an insulating base material, removing surface pollutants, and measuring the contact angle of water on the surfaces of the copper foil and the insulating base material through a contact angle measuring instrument; 2, performing low-temperature oxygen plasma activating treatment on the cleaned surfaces of the copper foil and the insulating base material; 3, forming a thermal stress buffer layer on the surfaces of the activated copper foil and the insulating base material; 4, carrying out thermocompression bonding, wherein temperature, pressure and time parameters of thermocompression bonding are dynamically optimized according to thickness data and surface energy data of the buffer layer; and step 5, carrying out post-curing treatment on the copper-clad laminated board subjected to primary bonding. Through cleaning, low-temperature oxygen plasma activation and the addition of the thermal stress buffer layer, the surface quality and thermal stability of the copper foil and the insulating base material are effectively improved.

The invention relates to a current collector with a concave-convex morphology on the surface and a preparation method and application thereof, belongs to the technical field of lithium resource development and utilization, and solves the problems of low interface bonding strength between an electrode current collector prepared by the existing method and a lithium extraction active material, large resistance change, poor electrode cycling stability and low current efficiency in a lithium extraction process. The current collector with the concave-convex morphology on the surface is formed by processing the surface of a flat current collector, the surface has two morphologies, the morphology with the maximum peak height or valley depth is the primary morphology, and the other morphology is the secondary morphology; with the horizontal plane of the surface of the flat current collector as a reference, the peak height or valley depth H1 of the primary morphology is 50-500 [mu] m, and the peak height or valley depth H2 and peak width W of any secondary morphology are 0.05-1 power of the peak height or valley depth of the primary morphology; the interface bonding strength of the current collector prepared by the method and the lithium extraction active material is high, and the current efficiency is high.

The present application relates to a kind of multilayer circuit board manufacturing method of embedding special-shaped metal base, provide integrally formed special-shaped metal base, it includes main part and expansion part, expansion part is protruding on at least two opposite sides, increase the overall volume of metal base and the contact area with multilayer board under the premise of not invading device layout space;Subsequently, milling groove processing is carried out to multilayer core plate and prepreg, first groove body matching the outer contour of expansion part is milled on the bottom layer core plate, and second groove body matching the outer contour of main part is milled on each layer above it;After special-shaped metal base is embedded in corresponding groove body, hot pressing is carried out, so that the upper surface of main part is flush with the upper surface of top layer core plate, prepreg flows and solidifies as PP flow glue layer by heat, PP flow glue layer fills the gap between interface continuously, significantly improve the interface bonding strength;Finally, electroplating treatment is carried out, and electroplating layer is formed on the upper surface of main part and top layer core plate, with electrical conduction and secondary reinforcement function.