233 results about "Interfacial adhesion" patented technology

The invention discloses multi-solvent synergistically activated low-temperature semi-sintered copper paste and a preparation method and application thereof, and belongs to the technical field of conductive paste. The multi-solvent synergistically activated low-temperature semi-sintered copper slurry comprises the following raw material components in percentage by mass: 82-88% of conductive filler, 2-3% of a resin carrier, 4-7% of an activating solvent, 4-7% of a dispersing solvent and 2-3% of a curing agent. Through cooperation of multiple solvents, full-stage activation of the copper particles is achieved, pre-connection and sintering of the copper particles before resin is completely crosslinked and cured are promoted, densification of the overall structure is improved, the insulation barrier effect of the resin is effectively avoided, the resistivity is reduced, meanwhile, inhibition of the resin on sintering of the copper particles is solved, and the service life of the copper particles is prolonged. And good balance between conductivity and interface adhesion is realized. Through resin curing, chemical bonding between the slurry and the substrate can be enhanced, a metal bond network among copper particles is expanded, and mechanical connection stability and electrical performance are guaranteed.

The invention discloses an anti-corrosion self-repairing super-amphiphobic coating film and a preparation method thereof, and belongs to the technical field of polymer coating materials. The coating film sequentially comprises a nano particle skeleton layer, a dynamic borate bond layer and a super-amphiphobic functional layer from inside to outside, and the three-layer gradient design synergistically realizes micro / nano structure stability, self-repairing and super-amphiphobic functions. The framework layer takes SiO2-TiO2 composite nanoparticles as a substrate and provides support; the dynamic boric acid ester bond layer forms a dynamic network through polycondensation of an organic boron compound, endows the self-repairing capability and enhances interface bonding; the super-amphiphobic functional layer is formed by grafting a fluorine-containing organosilicon compound and has hydrophobic and oleophobic properties. A multi-layer structure is constructed step by step, the reaction condition is mild, the operation is simple, the cost is low, the method is suitable for large-scale industrial preparation, the coating film has excellent super-amphiphobic performance and interface adhesion performance, the super-amphiphobic performance of the coating film can still be kept stable in long-term use or a complex environment, and the problem that an existing super-amphiphobic material is prone to damage is effectively solved.

The invention discloses a double-layer composite structure cable sheath and a preparation method thereof, and belongs to the technical field of cable sheath materials. The invention relates to a preparation method of a cable sheath with a double-layer composite structure. The preparation method comprises the following steps: uniformly mixing polyvinyl chloride, an organic ester compatilizer and a metal salt stabilizer to obtain a PVC mixture; caprolactam is subjected to ring opening treatment and then subjected to copolymerization with adipic acid and polyether amine, and modified nylon 6 is obtained; uniformly mixing the modified nylon 6, an aliphatic diester lubricant and an amine stabilizer to obtain a nylon mixture; the cable core passes through a co-extrusion die head, the PVC mixture and the nylon mixture wrap the cable core from inside to outside in a melt co-extrusion mode, and after shaping, the cable sheath of the double-layer composite structure is obtained. The problems of layering, bubbles, poor interface bonding force and the like in combined processing of the nylon layer and the PVC layer are solved. And the obtained cable sheath has high toughness, bending resistance and fluidity.

This invention relates to the field of waterproof coating technology, and more particularly to a rare earth tailings-modified emulsified asphalt grouting material and its application. The asphalt grouting material comprises a modified emulsified asphalt composition, which includes asphalt and modifying components; the modifying components include SBR emulsion, rare earth tailings, and a coupling agent; by weight, the asphalt is 300-1200 parts, the SBR emulsion is 75-250 parts, and the rare earth tailings are 3-24 parts. This invention uses rare earth tailings to modify the emulsified asphalt, resulting in modified emulsified asphalt that can better deposit on the interface during the demulsification stage, exhibiting higher interfacial adhesion and water resistance. This has significant application value in the field of emulsified asphalt grouting materials.

The invention discloses a nano ceramic anti-corrosion heat-dissipation coating, and belongs to the technical field of coatings. Comprising a paint component A and a curing agent component B, wherein the paint component A comprises the following raw materials in parts by weight: 40-60 parts of modified epoxy resin, 15-20 parts of modified ceramic powder, 35-55 parts of a solvent, 0.6-1.2 parts of a dispersing agent, 0.3-0.6 part of a defoaming agent and 0.2-0.4 part of a flatting agent. According to the coating prepared by the invention, four ceramic fillers are introduced, so that the heat dissipation performance and the corrosion resistance of the coating can be remarkably improved; ceramic powder is subjected to surface modification through a silane coupling agent, so that the dispersity and interface bonding force of filler in a resin matrix are improved, and the overall performance is improved; the epoxy resin is modified, so that the corrosion resistance and heat resistance of the coating are further improved; in conclusion, the anti-corrosion heat dissipation coating successfully integrates the anti-corrosion function and the heat dissipation function, and the problem that the anti-corrosion performance and the heat dissipation performance of a traditional coating are difficult to consider at the same time is solved.

The application discloses an anti-corrosion self-repairing super-amphiphobic coating film and a preparation method thereof, and belongs to the technical field of high polymer coating materials. The coating film is sequentially composed of a nanoparticle skeleton layer, a dynamic borate ester bond layer and a super-amphiphobic functional layer. The three-layer gradient design cooperatively realizes micro / nano structure stability, self-repairing and super-amphiphobic functions. The skeleton layer takes SiO2-TiO2 composite nanoparticles as a substrate to provide support. The dynamic borate ester bond layer forms a dynamic network through organic boron compound polycondensation, and is endowed with self-repairing capability and enhanced interface combination. The super-amphiphobic functional layer is formed by grafting fluorine-containing organosilicon compounds, and has hydrophobic and oleophobic properties. The multilevel structure is constructed in steps, the reaction condition is mild, the operation is simple, the cost is low, and the method is suitable for large-scale industrial preparation. The coating film has excellent super-amphiphobic performance and interface adhesion performance, and the super-amphiphobic performance of the coating film can still be kept stable in long-term use or complex environment, and the problem that existing super-amphiphobic materials are prone to damage is effectively solved.

This invention belongs to the field of flame retardant technology, specifically relating to a coated boron nitride and its preparation method and application, and a biodegradable flame-retardant composite material and its preparation method and application. This invention employs a multi-level structure regulation approach, utilizing silane coupling agents and chemical bonding for surface coating modification, effectively alleviating stress concentration. Furthermore, regular polyhedral flame-retardant units are constructed on the coated and modified two-dimensional boron nitride surface, building a three-dimensional flame-retardant network. Through phytic acid molecular bridging, an inorganic-organic interface transition layer is formed, significantly improving the interfacial adhesion strength between the functional phase and the matrix resin. This invention constructs a flame-retardant structural system based on molecular configuration optimization, optimizing the interfacial compatibility between the functional phase and the biodegradable matrix resin. It utilizes a bio-based phosphorus-nitrogen synergistic flame-retardant system combined with a two-dimensional boron nitride structure for composite design, constructing a flame-retardant network system with both high-efficiency flame-retardant properties and excellent performance.

This invention discloses a method for combining CNC high-precision high-temperature resistant insulating substrate engraving with tin-copper alloy printed circuit 3D printing, belonging to the field of high-power circuit carrier manufacturing technology. The invention uses 99.7% alumina ceramic or silicon nitride ceramic as the insulating substrate, achieving high-precision structural forming of ±0.005-0.025mm through CNC layer engraving. Sandblasting, roughening, sensitization, activation, and pre-plating surface modification enhance interfacial adhesion. CuSn10 tin bronze is used as the printing material, and the circuit is formed by SLM or FDM 3D printing at a sintering temperature of 850-900℃, achieving a forming density ≥98.71%. Through stepped heating sintering and high-temperature resistant inorganic adhesive curing, the ceramic substrate and tin-copper alloy circuit are integrated. The circuit carrier obtained by this invention has a long-term temperature resistance of ≥1600℃, a volume resistivity of ≥10¹⁴Ω·cm, a current carrying capacity of 15.6A for 3mm lines, and an adhesion strength retention rate of ≥95% after 1000 thermal cycles. The temperature rise is 15~20℃ lower than that of traditional PCBs. It is suitable for high-load, high-current scenarios such as industrial power supplies and new energy power control. It is compatible with processes and has complete industrial support, and has significant technical and economic feasibility.

The present invention relates to an electrode assembly, a secondary battery including the electrode assembly, and a method of manufacturing the electrode assembly, wherein a corona surface treatment is applied to a portion of a surface of a separator located inside a unit cell to increase interfacial adhesion between the separator and an electrode without decreasing electrolyte impregnability.

The invention relates to an LSPC foamed sheet and a preparation method thereof, and belongs to the technical field of foamed materials. In order to solve the problems that an existing foamed stone-plastic plate is uneven in foam hole, insufficient in strength and prone to local collapse, a novel foam regulator is introduced into a PVC-based foaming system. According to the regulator, through hydrosilylation, ring opening and silane coupling reaction, a polysiloxane-alkyl ester functional structure is grafted on the surface of nano silicon dioxide, bubbles are induced to be uniformly nucleated by utilizing low surface tension of the functional structure, and bubbles are inhibited to be aggregated through an interface adhesion energy barrier, so that a uniform and fine closed-pore structure is formed. The density of the obtained LSPC board is reduced, and the LSPC board has excellent mechanical strength and high-temperature collapse resistance and is suitable for bearing, floor heating and other scenes.

This invention relates to a highly adhesive pavement crack repair material, its preparation method, and its application. It comprises the following raw materials in parts by weight: 1-5 parts adhesive, 70-100 parts base asphalt, 3-7 parts copolymer modifier, 1.5-3 parts cationic emulsifier, 1-3 parts functional water-reducing agent, 1-2 parts defoamer, 2-5 parts pH adjuster, 80-94 parts water, 90-110 parts cement, 70-110 parts sand, 10-20 parts functional filler, and 0.01-0.06 parts expanding agent. This invention first modifies the base asphalt with a copolymer modifier, then combines it with a cationic emulsifier and adhesive to prepare a reactive, highly adhesive pavement crack repair material. After complete curing, this repair material forms a polymer cross-linked network, exhibiting weak relaxation behavior. The flexibility of the cross-linked network and its high adhesion to the crack wall endow the reactive repair material with superior anti-interlocking performance and low-temperature tensile properties, effectively solving the problems of insufficient interfacial adhesion and easy cracking in traditional pavement repair materials.

The invention discloses a composite plugging material for a high-temperature-resistant fracture stratum and an implementation method of the composite plugging material. The composite plugging material is prepared from a base material, a flexibilizer, a high-temperature stabilizer, a plugging agent, a curing accelerator and an interface enhancer, the implementation of the composite leaking stoppage material is completed through four stages of single agent preparation, leaking stoppage slurry preparation, stratum injection and curing packing. The composite leaking stoppage material disclosed by the invention can keep a stable structure at a high temperature of 150-220 DEG C, and has excellent leaking stoppage sealing property, interface cohesiveness and toughness; the preparation process of each single agent for forming the composite plugging material is mature, special equipment is not needed, and industrial mass production can be realized; the field application process is compatible with existing drilling equipment, operation is easy, the construction period is short, and the drilling cost is reduced.

This invention relates to the field of porous carbon materials technology, and discloses a method for preparing phenolic resin-based porous carbon based on the synergistic activation of water vapor and carbon dioxide. The focus of this invention is on constructing a "ZIF-8@Ni-MOF derived bifunctional material with pore formation – nitrogen / nickel co-doping + dynamic pressure – dual-gas synergistic etching + Ti3C2T" process. x The "MXene gradient modification" multi-dimensional process utilizes MOF-derived materials to provide well-defined initial pores and active sites. Combined with complementary dual-gas properties and dynamic pressure control, precise customization of pore sizes from 0.7 to 50 nm is achieved. MXene modification simultaneously enhances conductivity and interfacial adhesion. The resulting material exhibits superior performance, with a microporosity ≥88% and a specific surface area ≥2200 m². 2 / g, total pore volume ≥1.3cm³ 3 / g, the process produces no chemical waste pollution. When applied to silicon-carbon anodes in lithium batteries, it maintains a capacity retention rate of ≥85% after 500 cycles, demonstrating high industrialization value.

The application relates to an engine wire harness with good shielding performance and a preparation method thereof, and belongs to the technical field of new energy vehicles; a compatilizer is prepared, the compatilizer is a polyphenyl ether-polyethylene graft copolymer, the polyphenyl ether chain segment in the molecular structure is compatible with polyphenyl ether, and the polyethylene chain segment is compatible with high-density polyethylene; the structure can significantly reduce the interfacial tension between the polyphenyl ether / high-density polyethylene two phases, greatly enhance the interfacial adhesion, effectively inhibit phase separation and interfacial peeling, effectively improve the mechanical properties of the material, in addition, the compatilizer does not need to introduce a new resin component, potential influences of external components on the properties of the matrix are avoided, and the inherent properties of the polyphenyl ether and high-density polyethylene matrix resins can be better reserved.

Provided is a system for predicting compatibility between different kinds of resin materials, the method being capable of predicting compatibility such as mutual solubility and interfacial adhesion between constituent materials in a blend material prepared by mixing a plurality of resin materials. The system is characterized by comprising: a three-dimensional molecular model creation unit that creates a three-dimensional molecular model of each of a plurality of resin materials using, as input information, information obtained by digitizing the chemical structures of the resin materials; a molecular entanglement model creation unit that, using the three-dimensional molecular model, temperature, and pressure as input information, creates a molecular entanglement model of different kinds of resin materials in which two kinds of the three-dimensional molecular models of each of the resin materials are combined; a mutual diffusion coefficient calculation unit that executes a molecular simulation on the basis of the molecular entanglement model and calculates a mutual diffusion coefficient between the different kinds of resin materials; a fracture energy calculation unit that performs a molecular simulation on the basis of the molecular entanglement model and calculates a fracture energy; a trajectory saving unit in which the time evolution of the coordinates of the molecular entanglement model in the process of calculating the fracture energy is saved; and a simulation result output unit that outputs the mutual diffusion coefficient and the fracture energy as numerical information and outputs the time evolution of the coordinates as a moving image.

The invention discloses low-carbon polypropylene fiber concrete with high toughness and crack resistance, and belongs to the field of concrete. The raw materials comprise, by mass, 100-110 parts of coarse aggregate, 60-70 parts of fine aggregate, 20-30 parts of cement, 80-120 parts of fly ash, 15-20 parts of modified polypropylene fiber, and 2-3 parts of a water reducing agent; the use amount of the water meets the condition that the water-cement ratio is 0.3-0.4; according to the method, the surface of the polypropylene fiber is subjected to controllable micro-etching through concentrated phosphoric acid, a microscopic gully and micropore structure is formed, effective roughening of the surface of the fiber is achieved, the specific surface area of the fiber is greatly increased, the fiber can generate a stronger mechanical meshing effect in concrete, pulling out of the fiber is effectively prevented, and the tensile strength of the fiber is improved. And in the subsequent silane coupling agent treatment, a stable'molecular bridge 'is constructed between the fiber surface subjected to acid etching activation and an inorganic cement matrix, and firm Si-O-Si covalent bond connection is formed, so that the problem of weak bonding force between the common polypropylene fiber and the matrix interface is solved.

This invention provides a highly adhesive, wide-temperature-range aqueous hydrogel electrolyte for zinc-ion batteries, its preparation method, and its applications. The method includes the following steps: dissolving sodium alginate in 2-morpholine ethanesulfonic acid buffer solution, adding EDC and NHS, and activating; then adding dopamine hydrochloride, undergoing an amidation reaction, dialysis purification, and freeze-drying to obtain SA-DA powder; adding gelatin and SA-DA powder to deionized water, stirring and mixing evenly, and allowing to stand; then immersing in the electrolyte and undergoing soaking treatment to obtain the final product. The electrolyte of this invention exhibits excellent interfacial adhesion and flexible mechanical properties, significantly improved electrochemical stability and cycle life, excellent wide-temperature-range adaptability and anti-drying ability, outstanding safety and biocompatibility, and a simple and highly controllable process, providing key technical support for the development of high-performance, high-safety flexible aqueous zinc-ion batteries.

The preparation method comprises the following steps: S1, under the protection of nitrogen, mixing hexaethylcyclotrisiloxane, octamethylcyclotetrasiloxane, dimethyl dialkoxy silane and an acid catalyst, reacting, adding a weakly alkaline substance to terminate the reaction, and filtering to obtain an oligomer A; s2, adding alkoxy silane into the oligomer A, uniformly mixing, and adding a boric acid compound into the mixture for condensation reaction to obtain a polysiloxane oligomer; s3, the polysiloxane oligomer is dissolved in an organic solvent, and the low-temperature flexible primer is obtained. According to the invention, the polysiloxane oligomer containing the diethylsiloxy chain link, the siloxy group, the boron element and the like at the same time is prepared, and the interface bonding strength of the silicone rubber is improved and the low-temperature flexibility function is realized by utilizing the empty orbital effect of boron atoms, the low-temperature characteristic of the diethylsiloxy chain link and the hydrolysis reaction effect of the siloxy group. The preparation method has the advantages of cheap and easily available raw materials and mild reaction conditions.

This invention relates to the field of polyester cord technology, specifically to a high-strength, high-stability polyester cord and its preparation method. The invention involves the following steps: high-viscosity polyester chips are subjected to screw melt spinning, air cooling and shaping, initial application of spinning oil, hot stretching, heat setting, relaxation heat treatment, impregnation with an activator, and winding to obtain pre-activated polyester fibers. The pre-activated polyester fibers are then heat-treated and stored to obtain modified polyester fibers. These modified polyester fibers are then doubling, twisting, and heat-set to obtain polyester strands. The polyester strands are then twisted using a twisting machine to obtain twisted cords. The twisted cords are immersed in a first adhesive solution for a first impregnation treatment, and then immersed in a second adhesive solution for a second impregnation treatment. After drying and heat treatment, the polyester cord is obtained. The polyester cord prepared by this invention not only possesses excellent mechanical properties but also excellent interfacial adhesion, enabling effective bonding with a rubber matrix.

This invention relates to the field of photovoltaic encapsulant film technology, and discloses a thermally conductive and insulating photovoltaic encapsulant film, its preparation method, and its application. The film is an integrated structure formed by double-layer co-extrusion, comprising upper and lower functional layers (each including 100 parts of matrix resin, 5-25 parts of BN@SiO2 core-shell composite filler, and 1.5-8 parts of functional microcapsules); the BN@SiO2 core-shell composite filler includes a BN@SiO2 core-shell structure with h-BN as the core and amorphous SiO2 as the shell, and a gradient interface layer grafted onto its outer surface (which, from the inside out, includes an anchoring layer covalently bonded to the SiO2 shell, a flexible stress-buffering crosslinking layer, and a hydrophobic outer layer); the fillers in the upper and lower functional layers have different orientations. The thermal conductivity of this film exceeds 1.0 W / (m·K), reducing the operating temperature of photovoltaic modules by nearly 20°C, and the volume resistivity after deflection exceeds 10¹. 5 It has a strength of Ω·cm and also possesses excellent resistance to PID, high-voltage insulation, and interfacial adhesion.

The present application relates to the technical field of wet shotcrete, and discloses a construction method for enhancing the adhesion of wet shotcrete and a tunnel rock wall interface, comprising the following steps: step one, construction preparation; step two, vibration impurity removal and dust absorption; step three, high-pressure air gun cleaning and dust removal; step four, high-pressure water flushing and rough surface formation; step five, wet shotcrete layer-by-layer spraying; and step six, curing. The present application completely removes impurities in the rock wall surface and gaps through integrated pretreatment of vibration impurity removal, hierarchical cleaning and concentrated water beam roughening, forms a uniform rough interface, significantly improves the interface adhesion of wet shotcrete and the rock wall, solves the problems of easy hollowing and peeling in the prior art, and guarantees the safety and durability of initial tunnel support.

The invention discloses a modified PBO fiber reinforced epoxy resin composite material as well as a preparation method and application thereof. The composite material comprises matrix resin and modified PBO fibers, wherein the matrix resin is prepared from the following components in parts by mass: 100 parts of epoxy resin, 75 to 85 parts of methylhexahydrophthalic anhydride and 0.3 to 0.8 part of 2, 4, 6-tri (dimethylaminomethyl) phenol; the modified PBO fibers account for 1-4% of the modified PBO fiber reinforced epoxy resin composite material by mass. The preparation method effectively solves the problems of strong surface inertia and poor interface adhesion with epoxy resin of the PBO fiber, obviously improves the interface shear strength, mechanical properties, thermal stability and thermal conductivity of the composite material through synergistic physical etching and chemical bonding, keeps high breakdown strength, and has the advantages of mild and controllable process, small fiber damage and low cost. The method is suitable for manufacturing the extra-high voltage insulation core rod.

This invention discloses a self-crosslinking oil-resistant fluorosilicone gel, its preparation method, and its applications, belonging to the field of special polymer materials technology. The preparation method of the gel includes: ring-opening copolymerization of trifluoropropylmethylcyclotrisiloxane and octylmethylcyclotetrasiloxane under alkaline catalysis to obtain a prepolymer; then reacting it with 3-(methacryloyloxy)propyltrimethoxysilane to introduce self-crosslinking groups, followed by post-treatment to obtain a self-crosslinkable prepolymer; finally, adding an organotin catalyst allows for rapid curing at room temperature to form a three-dimensional network structure. This invention imparts extremely low oil swelling rate to the material by introducing fluorinated segments, while achieving rapid self-crosslinking curing under mild conditions through molecular design. The resulting material possesses excellent oil resistance, ease of application, and good interfacial adhesion, making it suitable for sealing and plugging in harsh oil environments in aerospace, petrochemical, and other fields.

The invention discloses a method for preparing a chain extension polyurethane adhesive by using a waste PET degradation product, and the method specifically comprises the following steps: dissolving a pretreated waste PET plastic sheet in a mixed solution of 1, 4-butynediol and 1, 4-cyclohexanediol, carrying out alcoholysis reaction, adding zinc oxide, and continuing the reaction to obtain a waste PET alcoholysis solution; the preparation method comprises the following steps: carrying out a reaction on PPG and IPDI to prepare an NCO-terminated polyurethane prepolymer; and adding the waste PET alcoholysis solution serving as a chain extender into the polyurethane prepolymer to generate the polyurethane adhesive. The polyurethane adhesive prepared by the invention is excellent in performance, and has the advantages that rigid benzene rings and strong polar ester groups in a PET molecular chain are successfully introduced into a polyurethane system, so that the cohesive force and interface adhesive force of a product are remarkably enhanced, and the polyurethane adhesive is endowed with excellent bonding strength; meanwhile, the crosslinking density and the microphase separation degree are improved, and excellent mechanical strength and heat resistance are brought.

The present disclosure relates to improving power output of magnetoelectric (ME) films by fine-tuning different parameters of the films. These parameters may include e.g., resonance frequency, magnetic flux collection, interface adhesion, strain enhancement and coupling coefficient that may be fine-tuned through geometric modifications such as by adjusting thickness or layering, surface area or dimensions such as height and width aspect ratio, and patterning. Other configurations of ME film design may also include incorporating additional elements such as a flux-steering element for capturing more flux, additional coils or adding a bias magnet as a strain enhancer. ME films may offer miniaturization for integration into small-scale devices due to their sensitivity to electric and magnetic field, compact size, and low power consumption.

The invention discloses a modified emulsified asphalt mixture and an ultrathin wearing layer preparation method, and belongs to the field of road engineering, the modified emulsified asphalt mixture is prepared from the following components by weight: 10-16 parts of emulsified asphalt, 6-9 parts of epoxy resin, 3-9 parts of a flexibilizer, 0.1-0.5 part of a coupling agent, 90-110 parts of aggregate, and 10-15 parts of a composite filler; the composite filler is one or a mixture of furnace bottom ash, fly ash and polyamide fiber, and through physical crosslinking of the flexibilizer and chemical curing of the epoxy resin, the toughness and bonding performance of the emulsified asphalt are remarkably enhanced; meanwhile, the basalt aggregate is pretreated by adopting the silane coupling agent, so that the surface characteristics of the aggregate are optimized, the interface bonding force between the aggregate and the modified asphalt is greatly improved, and the problem of insufficient performance of a traditional material under traffic load is fundamentally solved.

This utility model relates to the technical field of adhesion testing devices, specifically a device for measuring the adhesion of polyurethane grouting materials. It includes: a bottom sample stage, a universal testing machine body, and a programmable computer. The bottom sample stage is mounted on the base of the universal testing machine body, and a clamping assembly is mounted on the displacement beam. The device fixes the substrate to be tested in the center of the bottom sample stage, applies polyurethane grouting material to the center of the substrate surface, and places a pre-made Marshall cylindrical mixture specimen on top to allow the grouting material to cure naturally. Four adjusting rods are manually tightened to clamp the Marshall specimen, and the displacement beam is controlled to move upwards at a uniform speed. This device can efficiently and stably test the interfacial adhesion performance between polyurethane grouting materials and different road substrates under controlled temperature and humidity conditions, improving the engineering guidance value and application extrapolation of the experimental results. Furthermore, worn clamping plates can be easily removed and replaced.

The invention relates to the technical field of copper foil preparation, in particular to a composite copper foil and a preparation method and application thereof. The invention discloses a preparation method of a composite copper foil. The composite copper foil is obtained by coating the surface of a PPS film with an organic modified layer containing xylene, epoxy resin and a coupling agent and then performing copper deposition. Wherein an interface transition layer with rich active functional groups is formed on the surface of the PPS film through the organic modification layer, so that the surface roughness and active sites are increased, and meanwhile, a network structure formed after epoxy resin is cured provides good mechanical strength and chemical stability; the composite copper foil obtained through copper deposition has excellent interface bonding force, heat resistance and corrosion resistance, and the preparation process is simple and controllable, moderate in cost and suitable for industrial production.

This invention proposes a polyimide slurry, a method for preparing a polyimide film, and a method for improving the interlayer adhesion between the polyimide film and inorganic layers. The slurry includes two aromatic polyamic acid slurries, A and B, an organic solvent, and a coupling agent. Polyamic acid A is the main component of the slurry, while polyamic acid B is used as an additive. This invention uses a specific polyamic acid component as an interface modifier. During the subsequent baking process, the structural characteristics of the additive polyamic acid B cause it to tend to aggregate at the material interface. The polyimide corresponding to polyamic acid B exhibits excellent interlayer adhesion with inorganic interfaces such as glass. This results in a polyimide film with high adhesion to inorganic layers such as SiNx or SiOx. Furthermore, compared to general small-molecule additives, the aromatic polyimide after baking with polyamic acid B exhibits extremely high thermal stability, improving the interlayer adhesion without compromising the thermal stability of the substrate polyimide film.

The invention discloses a high-performance concrete material for precast pile processing and a preparation method thereof, belongs to the technical field of concrete preparation, and aims to solve the technical problem that the mechanical property and phosphate resistance of concrete need to be further improved in the prior art. Through a combined scheme of seed crystal microbead surface modification, composite microbead inorganic shell layer construction and basalt fiber functionalization treatment, the material performance is integrally improved, seed crystal microbeads subjected to silanization treatment can be uniformly dispersed in a matrix, a hydration product is induced to be compactly separated out, and an interface transition area structure is improved; the composite microsphere with the inorganic shell layer realizes controllable release of active substances in the service process, and continuously repairs and protects defect parts, the basalt fiber modified by dopamine and covered by a mineralization layer effectively enhances the interface bonding force and improves the erosion resistance, and the basalt fiber, the inorganic shell layer and the basalt fiber form a complementary synergistic effect, so that the service life of the composite microsphere is prolonged. The material is excellent in mechanical property and corrosion resistance, and the overall bearing performance and the service life are remarkably improved.