259 results about "Interfacial bond" patented technology

The invention discloses a low-creep polytetrafluoroethylene composite material and a preparation method thereof, the low-creep polytetrafluoroethylene composite material comprises the following raw materials by weight: 50-60 parts of polytetrafluoroethylene, 35-45 parts of perfluoroalkoxy resin, 15-25 parts of modified composite fiber, and 1-2 parts of a lubricant. Polytetrafluoroethylene and perfluoroalkoxy resin are blended according to a specific proportion to serve as a base material, a hot press molding process is matched, the core performance of the material is guaranteed, the molten perfluoroalkoxy resin can fully infiltrate and wrap the surface of the modified composite fiber under the driving of hot press pressure, and the performance of the composite fiber is improved. The composite material has the advantages that the composite material is high in mechanical strength, can form strong interface combination with PTFE (polytetrafluoroethylene) framework particles, can permeate and fill gaps of the PTFE framework particles, eliminates internal pores through a welding effect, and finally forms a highly-compact whole, so that the creep resistance of the composite material is remarkably improved.

The invention discloses an anode material for adipic acid monoester electrolysis and a preparation method of the anode material, the electrode solves the key problems that a platinum layer is easy to fall off, the catalytic activity is low, the organic matter poisoning resistance is poor and the like of a traditional titanium platinum-plated electrode through multi-scale interface strengthening and nano structure regulation and control; the preparation method comprises the following core steps: constructing a porous ZrO2-TiO2 composite oxide layer on the surface of a titanium substrate by adopting a micro-arc oxidation-hydrothermal composite process, and generating platinum nanoparticles in situ to pre-fill pores, so that the anchoring effect of a platinum layer is remarkably enhanced; depositing a platinum / carbon nano tube (Pt / CNT) composite catalyst layer on the surface of the oxide layer through a pulse-ultrasonic synergistic electroplating technology, wherein the carbon nano tube is used as a conductive framework to inhibit platinum agglomeration; through vacuum annealing and electrochemical activation treatment, the interface bonding force and active site exposure are further optimized; the electrode shows excellent performance in an adipic acid monoester electrolysis system, and efficient electrocatalytic conversion from adipic acid monomethyl ester to dimethyl sebacate is achieved.

The invention relates to the technical field of composite materials, in particular to a high-strength epoxy resin composite material and a preparation method thereof, and the high-strength epoxy resin composite material comprises the following raw materials in parts by weight: 50-80 parts of a base material, 10-20 parts of a curing agent, 5-10 parts of modified carbon nanotubes, 3-10 parts of a reinforcing sheet, 3-6 parts of a reinforcing material and 1-3 parts of a flame retardant. In the preparation method, the modified carbon nanotubes are in chemical bond connection with the base material through surface modification, the interface bonding force is enhanced, stress is effectively transmitted, the unique layered structure and surface modification treatment of the enhanced sheet are enhanced, the enhanced sheet is firmly combined with the resin matrix, and a three-dimensional enhanced network is formed through the synergistic effect of mechanical interlocking and stress dispersion. The vermiculite sheet layer prevents crack propagation, and the modified carbon nanotubes and the reinforcing material effectively transfer stress, so that the tensile strength and bending strength of the composite material are greatly improved, and the high-strength application requirement is met.

The invention belongs to the field of composite ink coatings, and particularly discloses a high-thermal-conductivity and high-adhesiveness copper foil coating ink coating as well as a preparation method and application thereof. The ink coating is prepared from the following components in parts by weight: 15 to 25 parts of epoxy resin, 10 to 20 parts of polyurethane resin, 5 to 12 parts of modified cellulose, 30 to 45 parts of heat-conducting filler, 8 to 15 parts of aliphatic polyisocyanate curing agent, 20 to 35 parts of solvent, 2 to 5 parts of silane coupling agent and 0.5 to 3 parts of pigment. The modified cellulose is prepared by modifying halogen-free betaine hydroxide, and can cooperate with the double-resin matrix to enhance the interface bonding force and construct a three-dimensional heat-conducting network. After the surface of an electrolytic or rolled copper foil is coated with the ink coating, the heat conductivity coefficient of the coating is larger than 0.4 W / (m.K), the dyne value is larger than 38, the cross-cut test is larger than or equal to 4B, alcohol wiping resistance is achieved, falling is avoided, the color difference delta E is smaller than 1, and the ink coating is suitable for a high-frequency circuit substrate and a lithium battery current collector.

The invention relates to the field of optical display and material engineering, in particular to a silica gel integrated optical film with a 3D light splitting function and a manufacturing method of the silica gel integrated optical film. A silica gel integrated optical film with a 3D light splitting function comprises a transparent optical base material and a microstructure layer, and the microstructure layer is combined on the surface of the transparent optical base material in an integrated forming mode. And the microstructure layer is an anhydrous silica gel-resin composite material obtained by combining organic silica gel with low refractive index and resin with high refractive index through an anhydrous chemical reaction system. The optical film obtained in the invention has excellent interface bonding stability and long-term reliability, the overall thickness of the optical film is small, the optical loss is reduced, the light transmittance is higher, and the overall transmittance can reach 93% or above. And the manufacturing process integration degree and the mold repeated utilization rate are high, the industrial batch production requirement can be met, and the excellent industrial application prospect is achieved.

The invention discloses a silane-crosslinked low-smoke halogen-free flame-retardant oil-resistant polyolefin cable material and a preparation method thereof. The method comprises the following steps: preparing a bio-based polyesteramide toughening phase which is pre-polymerized by castor oil-based polyamide and poly (butylene adipate-co-terephthalate) and is terminated by itaconic anhydride; the preparation method comprises the following steps: self-assembling phytic acid and melamine to wrap ammonium polyphosphate, so as to prepare supramolecular flame-retardant gel powder; the method comprises the following steps: grafting aramid pulp fibers by using a phosphorus-containing silane coupling agent to prepare a reactive liquid crystal reinforced phase; the preparation method comprises the following steps: blending and banburying the components with a hydrogenated styrene-isoprene-styrene block copolymer, an antioxidant and a peroxide cross-linking agent, carrying out dynamic vulcanization and interface bonding, and carrying out extrusion and electron beam irradiation to finally crosslink. An interpenetrating-topology network structure is formed in the prepared cable material, the crosslinking degree is larger than or equal to 82%, and the cable material is rapid in crosslinking, excellent in oil resistance, low in smoke and free of toxicity and is particularly suitable for super high-rise building hanging cables, deep sea exploration cables and new energy automobile liquid cooling cables.

The invention discloses a medical catheter surface strong interface bonding hydrogel coating method based on subsurface initiated polymerization. The method comprises the steps that firstly, a mixed solvent of an organic solvent and water is adopted for conducting swelling pretreatment on the surface of a catheter base material, so that polymer chains on the surface layer of the base material are relaxed; a solution containing initiator molecules is injected into the inner cavity of the catheter, so that the initiator is diffused and anchored in the subsurface area of the base material; preparing a hydrogel monomer solution containing a hydrophilic monomer, a cross-linking agent and a catalyst, and pouring the hydrogel monomer solution into the inner cavity of the catheter; and finally, sealing the two ends of the conduit, and initiating polymerization reaction under a specific temperature condition, so that the initiator anchored on the subsurface is decomposed to generate free radicals. The hydrogel coating and the catheter base material form a double combination effect of physical interlocking and chemical bonding through a subsurface initiated polymerization mechanism, the firmness and stability of the coating are remarkably improved, and the method is particularly suitable for modification of the inner surfaces of various medical catheters with complex structures.

The invention discloses a reinforced and toughened composite modified cement-based material and a preparation method thereof, glauconite sand and cement are used as base materials, and a multi-component synergistic modification system is formed by compounding fluororubber powder, polyphenylene sulfide fiber, diabase fiber and a silane coupling agent. Wherein the fluororubber powder reduces microdefects through the softening effect, the polyphenylene sulfide fiber inhibits crack propagation by means of high modulus, the diabase fiber constructs a three-dimensional network to strengthen stress transfer, and the silane coupling agent optimizes the interface bonding performance. The limitation of a traditional material is broken through through cooperation of multiple components, the crack resistance, toughness and durability are remarkably improved while high strength is kept, the shrinkage rate is reduced, and the freeze-thaw resistance is improved. Industrial solid waste raw materials are preferably selected in the preparation process, efficient compounding of multi-phase materials is achieved through a specific technology, the problems that a traditional cement-based material is large in shrinkage deformation, insufficient in bending strength and brittle cracking are effectively solved, and the excellent mechanical property and the long-term durability are achieved.

The invention provides a shoe material master batch based on coffee grounds and a preparation method thereof. The shoe material master batch comprises the following raw materials in parts by mass: 100 parts of coffee grounds, 30-70 parts of a thermoplastic material, 5-10 parts of an isocyanate-terminated polyurethane prepolymer, 3-10 parts of a compatibilizer, 1-5 parts of a filler and 0.1-1 part of an antioxidant. The content of the coffee grounds in the shoe material master batch is 50% or above, the isocyanate-terminated polyurethane prepolymer is applied to the highly-doped coffee grounds system, the interface bonding force between the coffee grounds and a thermoplastic material matrix and the melt supporting capacity can be remarkably improved through the cooperation of the isocyanate-terminated polyurethane prepolymer and the filler, the shoe material master batch has the good melt index and melt strength, and the service life of the shoe material master batch is prolonged. The foaming material has good processability and foaming performance, so that the foaming material can be better applied to foaming shoe materials.

The invention discloses low-silver-content composite conductive silver paste based on a three-dimensional conductive network and a preparation method, and relates to the technical field of composite conductive silver paste preparation, and the low-silver-content composite conductive silver paste comprises a low-silver-content conductive phase, an interface bonding layer, a support body and an organic carrier; and the conductive phase with low silver content comprises the following components: 25 wt%-30 wt% of silver-plated hollow glass beads and 12 wt%-18 wt% of a three-dimensional conductive network. According to the invention, through accurate proportioning of the conductive phase with low silver content, the use amount of silver is greatly reduced. The silver-plated hollow glass bead takes light glass as a core and an ultrathin silver layer as a conductive shell, so that the silver consumption is reduced by more than 60wt%; the three-dimensional conductive network adopts a synergistic structure of silver nanowire fragments and graphene composite fragments, and the high conductivity of graphene is utilized to replace part of silver materials, so that the dependency degree of silver is further reduced. The silver content of the silver paste is greatly reduced, the cost of raw materials is greatly reduced, and the economical efficiency of the silver paste in large-scale application scenes such as photovoltaic and electronic packaging is remarkably improved.

According to the nano reinforced epoxy resin and the preparation method thereof provided by the invention, the composite coupling agent system and the multiple different nano material composite system are introduced, and the design of the composite coupling agent system aims to act on three different nano materials through a unified system at the same time; and the dispersibility and the interface bonding force of the epoxy resin in an epoxy resin matrix are enhanced. The three different nanometer materials are selected from nanometer silicon dioxide, carbon nanotubes and graphene; the composite coupling agent is uniformly adsorbed on the surfaces of the three nano materials, so that the three nano materials form a stable dispersion state in an epoxy resin matrix. And ultrasonic waves or mechanical stirring is used for treatment, so that the surfaces of all nano materials can uniformly adsorb the composite coupling agent, and the performance of the epoxy resin is remarkably improved. The interface bonding force between the surface-modified nano silicon dioxide, the carbon nano tube and the graphene and the epoxy resin is enhanced, and the problem that the dispersity and the interface bonding force of nano particles are insufficient is solved.

The invention discloses an enhanced tensile wear-resistant multi-twisted steel wire rope, which relates to the technical field of steel wire ropes, and structurally comprises a multi-twisted steel wire rope formed by twisting three sub-ropes in a left-to-right interactive manner, and each sub-rope is formed by twisting six stranded ropes in a right-to-right interactive manner; the aluminum-based carbon fiber composite core serves as the center of the stranded rope, and the gradient functional layer comprises six center steel wires on the inner layer, twelve micro-arc oxidation concave steel wires on the middle layer, eighteen graphene / zinc-aluminum coating convex steel wires on the outer layer and twelve phase change lubricating fiber bundles on the surface layer. The outer surface of the steel wire rope is sequentially coated with a self-repairing sealing layer containing repairing microcapsules, a boehmite / silane interface bonding layer and an Al2O3 / PEEK abrasion-resistant coating. The tensile strength and the structural stability are improved through a three-stage twisting process; the aluminum-based carbon fiber composite core and the gradient functional layer synergistically enhance core bearing, wear resistance and corrosion resistance; the phase change lubricating fiber bundles release lubricating components during friction, and damage repair is achieved through the self-repairing sealing layer; and the interface bonding layer and the wear-resistant coating strengthen the surface adhesive force and the wear resistance.

The invention belongs to the technical field of preparation of polytetrafluoroethylene composite materials, and provides an impact-resistant and heat-stable polytetrafluoroethylene composite material and a preparation method thereof. Montmorillonite enhances the strength and barrier property of the material through physical crosslinking and barrier action of a layered structure, and improves the dispersity, interface bonding force and thermal stability through grafting modification and metal ion exchange; the strength, the toughness and the wear resistance of the composite material are improved due to the high specific surface area and the small-size effect of the nanoparticles, and the interfacial compatibility and the impact resistance are optimized through coating modification of the silane coupling agent, the toughening monomer and the rubber; the polyacrylonitrile-based carbon fiber enhances the mechanical and conductive properties of the composite material by virtue of high strength and heat resistance, and further improves the interface bonding force and mechanical locking effect by virtue of mixed acid oxidation and chemical vapor deposition modification; through the synergistic effect of the three components, the mechanical, thermal and functional optimization of the composite material is realized.

The invention discloses a preparation method of a photocuring release agent suitable for a flexible substrate, and belongs to the technical field of release agents. The preparation method disclosed by the invention comprises the following steps: respectively preparing the dynamic epoxy acrylate, the biological fiber and the SiO2 (at) PDMS compound; the preparation method comprises the following steps: adding dynamic epoxy acrylate, a flexible monomer PEG400DA and an antistatic agent into a reaction kettle, stirring in a water bath at 60 DEG C, adding biological fibers and the SiO2-coated PDMS compound, dispersing, grinding by three rollers, adding a photoinitiator, a flatting agent and a defoaming agent, stirring at a low speed under a dark condition, and transferring a mixed solution to a vacuum defoaming machine for treatment. Through dynamic covalent bond design, a synergistic effect of a biological-inorganic composite material and refined process control, the problems of high shrinkage, low flexibility and insufficient interface bonding force of a flexible substrate photocuring release agent are solved.

The invention relates to the technical field of high polymer material recycling, and discloses a composite material prepared from recycled PC (polycarbonate), which comprises the following components in parts by mass: 95-100 parts of recycled PC; 10 to 20 parts of a reactive toughening agent with a maleic anhydride functional group; 0.5 to 2.0 parts of a furan functionalization reagent; 2 to 8 parts of a bismaleimide cross-linking agent; 0.5 to 1.0 part of a compound stabilizer; the reactive toughening agent with the maleic anhydride functional group is a maleic anhydride grafted styrene block copolymer; the maleic anhydride grafted styrene block copolymer is a product obtained by reacting a styrene-ethylene-butylene-styrene copolymer with maleic anhydride. According to the invention, efficient reutilization of recycled polycarbonate is realized, rigid-tough balance is improved through interface bonding of the reactive flexibilizer, the material is endowed with self-repairing capability by utilizing a dynamic cross-linked network, and the service life is remarkably prolonged.

The invention discloses a silicone rubber composite material for enhancing the wear resistance of a tire and a preparation method of the silicone rubber composite material, and belongs to the technical field of silicone rubber materials for tires. The silicon carbide nanofibers directionally bear stress through a one-dimensional structure, the surface friction coefficient is reduced through the layered lubricating characteristic of fluorinated graphene, and crack propagation is inhibited on the micro-level through the synergistic effect of the silicon carbide nanofibers and the fluorinated graphene. The tribological performance is further optimized through compound addition of the polyimide microspheres and the nano-diamond powder, dynamic friction loss is reduced through the ball effect, and the surface scratch resistance is improved through the ultra-high hardness of the nano-diamond powder. Meanwhile, the filler-matrix binding force is enhanced through interface bonding of the sulfydryl modified titanium dioxide quantum dots and the zinc borate nanosheets, abrasive particle falling caused by interface stripping is effectively avoided, and the structural integrity of the material is kept under the long-term dynamic load.

The vacuum brazing process comprises the steps that an alloy substrate and fins are placed in a liquid nitrogen cooling environment to be subjected to graphene deposition treatment, then silver-based brazing filler metal is deposited, pulse airflow is introduced every preset period to disturb brazing filler metal atoms, the alloy substrate and the fins are placed in an alignment clamp, and alignment treatment is conducted on a crystal nucleus substrate and the fins; brazing is controlled to be started in a vacuum brazing furnace, interface bonding of graphene and brazing filler metal is promoted, and an initial brazing assembly is formed; the initial brazing assembly is subjected to annealing treatment, vibration is applied to the initial brazing assembly in the annealing process, and an optimized brazing assembly is obtained; and under the inert atmosphere, a diamond-like carbon film is deposited on the surface of the optimized brazing assembly, and the heat dissipation assembly is obtained. The interface bonding strength and the heat conduction efficiency are remarkably improved, the heat dissipation requirement of a high-power-density electronic device is met, the service life of the device is effectively prolonged, and the working stability of the device is improved.

The invention relates to the technical field of microelectronic devices, in particular to a single-molecule memristor-rectifier device based on supramolecular assembly and a preparation method thereof. According to the preparation method, the guest molecule B is covalently connected with the tail end of the graphene electrode pair, so that stable and tight interface bonding between the supramolecular functional molecule and the electrode can be ensured; and then soaking the graphene electrode pair connected with the guest molecule B in a solution containing the host molecule A and the guest molecule C to form a supramolecular functional molecule between the graphene electrode pair. The guest molecule C in the supramolecular functional molecule has intrinsic oxidation-reduction activity, and the molecular structure of the guest molecule C can generate a reversible electron gain and loss process, so that controllable and reversible adjustment of charge distribution in the molecule is realized. Under the action of an electric field, through the reversible oxidation-reduction reaction of the guest molecule C, significant changes of intramolecular charge distribution and electron transmission characteristics are triggered, and finally reliable switching of high and low resistance states of the device is achieved.

The invention discloses a glass fiber reinforced polypropylene structure strength optimization method for a flow battery pole frame, and particularly relates to the technical field of material processing quality control, and the method comprises the following steps: collecting multi-parameter information forming original processing data, constructing an input dimension group, and determining whether a structure optimization process determination condition is satisfied; after the conditions are met, an arrangement orientation index and a bonding activity index are synchronously constructed; on the basis of an index combination activation path shunting mechanism, selecting an optimal logic to generate an adjustment instruction set; the machining variables are adjusted in a linkage mode according to the instruction set; after the processing is completed, a staged cooling gradient is maintained through an isothermal heat field, and the curing process of the structure arrangement and the bonding state is completed; according to the method, a structure optimization process is started based on multi-parameter judgment, a double-index driving path shunting mechanism is constructed, and dynamic instruction adjustment and isothermal thermal control cooling are combined, so that synchronous optimization of fiber arrangement and interface bonding in the whole processing process is realized, and the structural stability and the bonding integrity are improved.

The invention relates to a fluff polishing brush wire and a preparation method thereof, and belongs to the technical field of nylon materials for brush wires. The napping polishing brush wire is made of a nylon material, and the nylon material is prepared by the following steps: uniformly mixing a silane coupling agent and absolute ethyl alcohol, adding a carbon nano tube, heating, stirring and purifying to obtain a pretreated carbon nano tube; ultrasonically mixing the pretreated carbon nanotube, ethyl acetate, styrene and glycidyl methacrylate, adding an initiator, heating and stirring for reaction, and purifying to obtain a modified carbon nanotube; aBS is subjected to heat treatment, nylon resin, the modified carbon nanotubes, the compatilizer, the antioxidant and the lubricant are added, melt extrusion is performed, and the ABS composite material is prepared. The compatilizer and the modified carbon nanotubes are added, and maleic anhydride, an epoxy functional group and a styrene phase are contained, so that the compatibility of nylon and ABS can be improved, the interface bonding force of the carbon nanotubes in an organic system can be improved, the mechanical property and the processability of the material can be improved, and the impact resistance of the composite material can be improved.

The invention provides a multi-layer metal composite molded product, the multi-layer metal composite molded product has a multi-layer structure, a bonding layer is arranged between a first layer and a second layer and forms metallurgical bonding with the first layer and the second layer respectively, and the first layer forms interface bonding with the second layer through the bonding layer. By implementing each embodiment of the multi-layer metal composite molded product, the processing difficulty and the manufacturing cost of the multi-layer metal composite molded product can be reduced.

The invention provides a dynamic load-oriented brazed diamond bonding strength testing device and method. The dynamic load-oriented brazed diamond bonding strength testing device comprises a base, a test framework, a self-adaptive sample holding unit, a data acquisition unit and a visual auxiliary alignment unit, the self-adaptive sample holding unit realizes stable clamping and angle adjustment of a sample through a rotatable platform, a translation bottom table, a hydraulic clamping cylinder and an angle adjusting piece; the data acquisition unit acquires a shear force-displacement curve by using a fiber bragg grating sensor, and a high-speed camera records a fracture process; and the vision-assisted alignment unit (high-resolution industrial camera) is used for calibrating the positions of the sample and the pressure head. The method comprises the steps of intelligent pre-characterization clamping, variable load dynamic shear testing, in-situ fracture mode judgment, multi-mode effective fracture area measurement and multi-dimensional strength characterization. According to the invention, the sample positioning and clamping stability is improved, the loading interference is reduced, the interface bonding strength is quantitatively and reliably represented under the dynamic load, and the test accuracy and repeatability are guaranteed.

The invention relates to the technical field of functional textile materials, in particular to a hollow heating fabric for winter gown warm keeping and a preparation process thereof.The hollow heating fabric comprises an inner layer, an outer layer and a middle layer, and a layer fiber solution is sprayed between the inner layer and the middle layer and between the outer layer and the middle layer; the preparation process comprises the steps of premixing, double-field coupling synergistic spinning, foaming, surface modification, construction of the microfluidic moisture-conducting layer and three-stage heat setting. According to the invention, the spraying design of the layer fiber solution can enhance the interlayer binding force of the hollow heating fabric, and the addition of the PCM microcapsule suspension and the TPU base material can form a core-sheath structure of the fabric, thereby significantly improving the mechanical properties of the fabric; the silane coupling agent is added, so that interface bonding among different materials can be enhanced; the energy consumption can be reduced and the attenuation performance of the fabric can be reduced by double-field coupling synergistic spinning auxiliary fabric forming; the three-stage heat setting can improve the dynamic environment adaptability of the fabric.

The invention discloses a polyphenyl ether modified epoxy resin-based copper-clad plate, and particularly relates to the technical field of copper-clad plates, the polyphenyl ether modified epoxy resin-based copper-clad plate comprises a glue solution, an electronic glass fabric and a copper foil, and the glue solution comprises the following raw materials: modified polyphenyl ether, an inorganic filler, a curing agent, a flame retardant and the balance of epoxy resin. The bisphenol A epoxy resin, toluene and benzoyl peroxide are utilized to treat polyphenyl ether, the molecular weight of the polyphenyl ether can be reduced, the crosslinking property of the polyphenyl ether and the epoxy resin is better, then paraformaldehyde is utilized to catalyze and modify the polyphenyl ether, the terminal of the polyphenyl ether is grafted with hydroxymethyl, and the polyphenyl ether is grafted with polyphenyl ether. The compatibility and interface bonding force of the obtained hydroxymethylated polyphenyl ether and epoxy resin are good, the dielectric loss performance and toughness of the copper-clad plate can be effectively improved, and anhydrous aluminum silicate of an amorphous layered gap structure formed through specific activation treatment can be formed during temperature-controlled calcination of kaolin. The dielectric constant and the dielectric loss of the copper-clad plate can be obviously reduced.

The invention discloses a low-temperature-impact-resistant high-strength bolt for a high-cold railway and a heat treatment method of the low-temperature-impact-resistant high-strength bolt. The bolt is of a special three-layer structure of a base body, a bionic nanometer laminated layer and a high-entropy alloy nitriding layer, wherein the grain size of the base body reaches the ASTM8 level or above; the bionic nano laminated layer is formed by alternately depositing TiN and VC, and the thickness of a single layer is less than 50nm; the high-entropy alloy nitriding layer is made of AlCoCrFeNiTi, the thickness is larger than 50 microns, the heat treatment method comprises the steps of grain refinement pretreatment, lamination preparation through magnetron sputtering, high-entropy alloy laser cladding, electromagnetic field assisted nitriding, oil quenching, cryogenic oscillation, tempering and the like, and intelligent quality control means such as a machine learning model, sound pressure feedback and image recognition are integrated. According to the scheme, the impact energy of the bolt at the temperature of minus 60 DEG C is higher than 55 J, the tensile strength is larger than 1200 MPa, the surface hardness is not lower than 1200 HV, the interface bonding critical load is higher than 80 N, and the problems of low-temperature brittle fracture, obdurability contradiction and quality consistency of the high and cold bolt are solved.

The present application relates to geotechnical engineering technical field, specifically to a kind of slope stabilizing mechanism and its construction technology, wherein, the slope stabilizing mechanism includes moving assembly, moving assembly includes expansion part and drive structure.Expansion part has the contraction state along the radial contraction of anchor rod and the expansion state along the radial expansion of anchor rod.Drive structure drives expansion part to move on anchor rod axially, and control expansion part switches between contraction state and expansion state.When expansion part is in expansion state and moves along anchor rod axially, the hole wall of drilling can be continuously wiped, the low-intensity, low-permeability mud skin structure formed on the surface of drilling hole wall due to drilling construction is broken, the loose drill cuttings and collapse on the surface of hole wall are removed, so that the surface roughness of drilling hole wall is improved, and then the interfacial bond strength between drilling hole wall and grouting body is enhanced, to avoid mud skin, drill cuttings and other impurities to hinder the effective combination of grouting body and hole wall.

The invention relates to a ternary lithium battery electrode material interface bonding force test method and system, and relates to the technical field of lithium battery interface test.The method comprises the steps that the interface performance requirements of ternary lithium battery electrodes in batches are obtained, and an interface electrochemical test scheme and an interface mechanical test scheme are configured according to the interface performance requirements; testing the batch of electrodes through an interface electrochemical test scheme to obtain an electrode interface electrochemical test data set; grouping and sampling the batch electrodes based on the data set to obtain a plurality of electrode sampling groups; testing the sampling group through an interface mechanical test scheme to obtain an electrode interface mechanical test data set; and establishing an interface bonding force correlation model by using the two data sets, and finally obtaining an interface bonding force evaluation result of the ternary lithium battery electrodes in batches. According to the method, the problems that in the traditional test, although full-amount detection can be realized, the accuracy is insufficient in nondestructive detection, and although the precision of lossy detection is high, the cost is high, the destructiveness is strong, and the efficiency and the accuracy are difficult to consider in batch electrode interface bonding force test are solved.

This utility model relates to a composite copper foil conductive layer structure, comprising a substrate layer, a transition layer, and a conductive layer. The conductive layer is located on the surface of the substrate layer, and the transition layer is located between the substrate layer and the conductive layer. Micropores are formed on the surface of the substrate layer by plasma etching. The transition layer is formed on the surface of the substrate layer by magnetron sputtering. Cross-linked mesh grooves are formed on the surface of the conductive layer by laser engraving or chemical etching. This structure, through a multi-layer composite design, provides mechanical support through the substrate layer, enhances interfacial bonding through the transition layer, and optimizes conductivity through the conductive layer. By combining a lightweight substrate with a highly conductive metal layer, a balance between high strength, high flexibility, and excellent electrical performance is achieved.

This invention relates to the field of cement technology, specifically to a fiber-reinforced high-strength cement pole and its preparation method. The pole comprises a steel wire skeleton and a conical annular pole body covering its outer circumference. The pole body is formed by centrifugal molding and curing of a cement-based composite material containing interfacially pre-complexed basalt chopped fibers. The interfacially pre-complexed basalt chopped fibers are obtained sequentially through alkaline activation, silane-nano silica treatment, polycarboxylate segment grafting, and calcium ion pre-complexation, and are added to the slurry after the cementitious material is initially moistened and before the aggregate is added. This method improves the dispersibility and interfacial bonding stability of the basalt chopped fibers in a low water-cement ratio cement matrix, thereby enhancing the pole's compressive, tensile, crack, shrinkage, and freeze-thaw resistance.

This invention discloses a bimetallic composite self-lubricating bushing and its preparation method, comprising an outer layer and an inner layer. The outer layer is made of steel, and the inner layer is made of copper alloy. The inner wall of the outer layer is provided with multiple mating grooves, which are arranged in multiple layers along the axial direction of the outer layer. Adjacent mating grooves are spaced apart, and each layer includes multiple annularly spaced mating grooves. The inner layer is located within the mating grooves. Each mating groove includes a tip and a tail. The tips of adjacent mating grooves face opposite directions, and the distance between two adjacent mating grooves is the same as the groove width. The multi-layer mating groove structure of this invention, through centrifugal casting, achieves bimetallic interlocking and increases the metallurgical bonding area of ​​the staggered triangular straight mating groove structure with adjacent layers of tips facing opposite directions, significantly improving the interfacial bonding force of the bimetallic composite bushing.