485 results about "Epoxy resin composite" patented technology

The invention discloses a high-temperature-resistant epoxy resin composite material and a preparation method thereof, and relates to the technical field of composite materials. The high-temperature-resistant epoxy resin composite material is prepared from the following raw materials in parts by weight: 70 to 80 parts of modified epoxy resin, 8 to 15 parts of high-temperature-resistant modifier, 15 to 30 parts of curing agent, 3 to 8 parts of nano reinforcing filler, 1 to 3 parts of coupling agent, 3 to 6 parts of carbon fiber, 2 to 5 parts of nano titanium dioxide, 5 to 10 parts of organic silicon rubber, 1 to 3 parts of conductive agent, 3 to 7 parts of flame retardant and 2 to 4 parts of zinc borate. The high-temperature-resistant epoxy resin composite material has outstanding advantages and strong thermal stability, and can bear high temperature; mechanical performance is excellent, and firmness and durability are achieved; the self-repairing capability is achieved, and the service cycle can be prolonged; the anti-permeability is good, and gas and liquid can be effectively blocked; the surface is smooth, the friction coefficient is low and the application prospect is wide.

The present invention relates to the technical field of composite materials. Provided are a glass fiber-reinforced epoxy resin composite material and a preparation method therefor. In the present invention, an epoxy silane coupling agent solution is used for performing surface modification on glass fibers. An epoxy silane coupling agent contains a hydrolyzable group and an epoxy group. Silicon hydroxyl generated when the hydrolyzable group is hydrolyzed can be connected to the glass fibers, so as to effectively modify the surfaces of the glass fibers. The epoxy group can react with an epoxy resin matrix, thereby improving the infiltration effect of the epoxy resin on the glass fibers and improving the bonding performance of the interface of the glass fiber-reinforced epoxy resin composite material, and thus improving the mechanical properties of the glass fiber-reinforced epoxy resin composite material. The epoxy resin is cured and modified by using a functional curing agent or nanoparticles, so as to improve the ductility or strength of the epoxy resin, thereby improving the mechanical properties of the prepared glass fiber-reinforced epoxy resin composite material.

The invention discloses a glass fiber reinforced epoxy resin composite material and a preparation method thereof, and relates to the technical field of composite materials, and the preparation method comprises the following steps: carrying out organic solvent immersion treatment, cleaning and drying on glass fibers to obtain pretreated glass fibers; respectively carrying out phytic acid modification treatment on the pretreated glass fibers and hollow alumina microspheres; performing plasma surface treatment on the glass fibers and the hollow aluminum oxide microspheres subjected to the phytic acid modification treatment; mixing and dispersing epoxy resin, a curing agent, the glass fibers subjected to plasma surface treatment and the hollow aluminum oxide microspheres according to a preset mass ratio; carrying out vacuum degassing on the mixture; and injecting the degassed mixture into a mold for step-by-step curing. The preparation method has the beneficial effects that active groups are introduced to the surfaces of the glass fibers through phytic acid treatment, the number of the active groups is further increased by combining plasma surface treatment, and the interface bonding capacity of the glass fibers and an epoxy resin matrix is remarkably improved.

The invention relates to a degradable epoxy resin composite material with an adjustable curing speed, and a preparation method and a mild total recycling method thereof. Existing degradable epoxy resin has the problems of high cost, harsh degradation conditions and the like, and is difficult to meet the requirements of different application scenes on curing speed and temperature at the same time. The invention provides an epoxy resin composite material which comprises curing agent components (an epoxy resin amine curing agent and an ester-containing polythiol curing agent) and epoxy resin components (glycidyl ether epoxy resin, glycidyl amine epoxy resin and glycidyl ester epoxy resin). The cured composite material can be fully recycled through catalytic degradation under mild conditions by using a lewis acid and an amino group breaking ester bond mechanism, and the degradation product can be directly used as a curing agent, a toughening agent and a chain extender. The epoxy resin composite material disclosed by the invention not only has adjustable curing speed and high use performance, but also realizes environmental friendliness and resource recycling, and provides a new solution for sustainable development of epoxy resin.

The invention discloses a modified amine curing agent and a preparation method thereof, and an epoxy resin composite material and a preparation method thereof, and belongs to the field of resin and composite materials. According to the curing agent, a C2-C8 alkyl chain is grafted to a methylene site of 4, 4 '-diaminodiphenylmethane (MDA) through free radical substitution and alkylation reaction, and a molecular structure with a flexible alkyl chain and a rigid benzene ring is formed. The preparation method comprises the following two steps: generating a halogenated intermediate from MDA and a halogen simple substance under certain reaction conditions, alkylating the halogenated intermediate with a Grignard reagent (RMgX), and purifying. The curing agent and epoxy resin are compounded, heated and cured, so that the epoxy resin composite material has relatively high impact strength and fracture toughness, has good tensile strength and hardness, has double functions of reinforcing and toughening, and solves the problem that reinforcing and toughening of traditional epoxy resin are difficult to be compatible; the method is suitable for the fields of aerospace, composite material adhesives and the like with harsh requirements on mechanical properties.

The invention discloses a preparation method of a WS2 / MXene / HBPSi synergistically enhanced epoxy resin composite material. The preparation method specifically comprises the following steps: preparing a WS2 / MXene hybrid from few-layer MXene powder, WCl6 and a sulfur source precursor; the preparation method comprises the following steps: uniformly mixing tetraethoxysilane, neopentyl glycol and triethanolamine, and carrying out gradient heating reaction to obtain HBPSi; epoxy resin EP is used as a resin matrix, DDS is used as a curing agent, a WS2 / MXene hybrid is used as a lubricating additive, HBPSi is used as a toughening agent, and the epoxy resin composite material is prepared by combining a melt blending process with a staged heating curing method. According to the method, the toughness and the interface bonding strength of the material are remarkably improved by introducing HBPSi, the friction coefficient of the material is effectively reduced and the wear resistance is improved through the synergistic effect of WS2 and MXene, and cooperative regulation and control of structural strengthening and friction performance improvement are achieved.

Disclosed are a steel fiber composite intelligent bar with a sheathing optical cable embedded in an inner core of a rebar, and a fabrication method thereof. The steel fiber composite intelligent bar includes the sheathing optical cable, the rebar, a winding layer, and tightening sheaths, wherein the sheathing optical cable comprises a glass fiber core, a polyimide coating layer, and a polyurethane wrapping layer that are stacked sequentially from inside to outside; the rebar is provided with a notch groove along a length direction; and the sheathing optical cable is embedded in the notch groove in parallel; the winding layer is wound around an outer surface of the rebar, and the winding layer is made of an epoxy resin composite fiber; and the tightening sheaths comprise a first tightening sheath and a second tightening sheath which are sleeved at two ends of the winding layer, respectively.

The invention discloses a polyimide and epoxy resin composite modified fluorocarbon resin coating and a preparation method thereof, and the polyimide and epoxy resin composite modified fluorocarbon resin coating comprises the following components in percentage by weight: 0.4-0.8% of monomer diamine, 0.4-0.8% of monomer dianhydride, 60-70% of N, N-dimethylacetamide, 10-20% of epoxy resin, 0.2-0.5% of epoxy curing agent, 1-2% of fluorocarbon resin curing agent and 15-25% of fluorocarbon resin. The preparation method comprises the following specific steps: reacting monomer diamine and dianhydride in N, N-dimethylacetamide, sequentially compounding with epoxy resin and an epoxy curing agent to obtain a composite modifier, and adding the composite modifier and a fluorocarbon resin curing agent into a fluorocarbon resin solution to obtain the polyimide and epoxy resin composite modified fluorocarbon resin coating. Compared with an existing fluorocarbon resin coating, the performance of the fluorocarbon resin coating is greatly improved in the aspects of mechanical performance, heat resistance, adhesive force and the like.

The invention provides an efficient composite material manufacturing method based on front-end polymerization initiation point design, relates to manufacturing of forming materials containing macromolecular substances, and belongs to the technical field of common technological processes of processing and batching of macromolecular materials. According to the invention, the epoxy resin composite material with excellent mechanical properties is rapidly prepared with low energy consumption by preparing the epoxy resin front-end polymerization solution and initiating front-end polymerization at multiple points. The method has the advantages of being high in designability, easy to operate and the like, and rapid and energy-saving manufacturing of the epoxy resin and the composite material thereof is achieved while the mechanical property is maintained through multi-point initiation of front-end polymerization. The method has a wide application prospect in batch production of epoxy resin and composite materials and manufacturing of large-scale structures.

The invention discloses a simple and efficient glass fiber fabric surface fluorination method, and belongs to the technical field of glass fiber fabric surface structure regulation and control. The fluorination method for the surface of the glass fiber fabric comprises the following steps: sequentially dipping glass fibers in a dopamine hydrochloride solution and a fluorine-containing silane coupling agent solution to obtain modified glass fibers. Firstly, polydopamine (PDA) is used for treating the surface of the fiber, then a fluorine-containing silane coupling agent is used for conducting structural design on the surface of the glass fiber, and comprehensive improvement of the interface bonding strength and the insulating property of the glass fiber epoxy resin composite material is achieved. The surface flashover voltage and the breakdown field strength of the composite material provided by the invention are remarkably improved, the treatment method is simple and convenient, and industrial batch preparation of the high-performance composite material can be realized.

The invention relates to the technical field of coatings, in particular to an acrylate-epoxy resin composite coating and a preparation method thereof. According to the technical scheme, the coating is prepared from 25 to 35 parts of methyl methacrylate, 15 to 25 parts of butyl acrylate, 10 to 20 parts of epoxy resin E-5110, 8 to 15 parts of organic silicon modified acrylate prepolymer, 5 to 12 parts of fluorocarbon modified epoxy resin, 4 to 8 parts of core-shell structure corrosion inhibition nano container, 1 to 3 parts of functionalized graphene quantum dots and 4 to 10 parts of polyhedral oligomeric silsesquioxane maleimide modified amine curing agent. And 1-3 parts of a hindered amine light stabilizer. By integrating the core-shell structure corrosion inhibition nano container, the functionalized graphene quantum dots and the photo-thermal dual responsive curing agent component, the sensing, response and self-repairing of the coating on damage are realized, and long-acting corrosion resistance, weather resistance, bacteria resistance, mechanical property balance and intelligent maintenance are considered; and efficient and economical full-period protection is provided for equipment in an extreme environment.

The invention belongs to the field of epoxy resin composite materials, and particularly relates to a high-heat-resistance degradable epoxy resin composite material and a preparation method thereof.The high-heat-resistance degradable epoxy resin composite material is prepared by using ester-based structure epoxy resin as matrix resin, selecting benzoxazine as reinforced resin, using a phosphorus-containing polysilazane derivative as a modifier and using anhydride as a curing agent; the high-heat-resistance degradable epoxy resin composite material is prepared by taking epoxy resin as a raw material and an amine accelerant as an accelerant through mixing, pouring, curing and forming. The high-heat-resistance degradable epoxy resin composite material disclosed by the invention has excellent degradation capability in an alkaline solution at the temperature of 80-150 DEG C; the heat resistance is excellent, and the glass transition temperature can reach 185 DEG C; meanwhile, the high mechanical strength is achieved.

The invention discloses a method for preparing a carbon fiber / epoxy resin composite material by utilizing regulation and control of an intercalation interface of a graphene oxide nanosheet, and belongs to the technical field of carbon fiber / epoxy resin composite materials. The preparation method comprises the following steps: pretreating carbon fibers to prepare aminated carbon fibers; preparing a carbon fiber / graphene oxide nanosheet hybrid material; and preparing the graphene oxide nanosheet intercalation interface regulated carbon fiber / epoxy resin composite material. According to the method for preparing the carbon fiber / epoxy resin composite material by utilizing graphene oxide nanosheet intercalation interface regulation, the interface compatibility of the carbon fiber and the epoxy resin matrix is regulated by taking the graphene oxide nanosheet as an intercalation, the mechanical and thermodynamic properties of the composite material can be improved, the method is simple and easy to implement, and the method is suitable for industrial production. And the method is suitable for different types of carbon fiber / epoxy resin systems.

A preparation method of an emulsion type aramid fiber sizing agent belongs to the technical field of fiber surface treatment, and the specific scheme is as follows: preparing aromatic polyamide from corresponding diamine and acyl chloride, then reacting with epoxy resin to prepare modified epoxy resin, and preparing the emulsion type aramid fiber sizing agent under the action of a compound emulsifier. The preparation method disclosed by the invention is simple and relatively low in cost, better interface bonding can be formed between the aramid fiber and the epoxy resin after sizing by the sizing agent, and particularly, the interlayer shear strength of the aramid fiber / epoxy resin composite material is relatively well improved; the preparation method has important significance in improving the use performance and stability of the aramid fiber composite material and expanding the application of the aramid fiber.

The invention discloses a degradation reagent of an anhydride cured epoxy resin composite material, a degradation method and application of a degradation product, and relates to the field of solid waste material recovery. The degradation reagent comprises a catalyst and a solvent, and the solvent is a strong alkali aqueous solution; the structure of the catalyst is p-hydroxybiphenyl of which a benzene ring is connected with a hydrogen group or a cyano group; the degradation method comprises the following steps: heating the anhydride cured epoxy resin composite material and the degradation reagent to react, neutralizing, concentrating under reduced pressure, and drying the precipitate to obtain a degradation product. Phenolic hydroxyl groups of the catalyst are deprotonated under the alkaline condition to form phenoxy anions, the phenoxy anions react with anhydride groups in the anhydride cured epoxy resin composite material, the anhydride groups are broken, high-efficiency degradation is achieved, and the degradation method is easy and convenient to operate, environmentally friendly and suitable for industrial production. After the degradation product and the anhydride curing agent are cured and regenerated, the comprehensive performance is good, and the recycling value is improved.

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 provides a wave-absorbing material, and belongs to the technical field of electromagnetic wave absorption. The wave-absorbing material comprises a metal reflection bottom layer, a wave-absorbing middle layer and a scattering upper layer, the wave-absorbing middle layer is made of a ferroferric oxide loaded reduced graphene oxide and epoxy resin (Fe3O4 (at) RGO / EP) composite material and used for absorbing electromagnetic wave energy, and the scattering upper layer is of a patterned metasurface structure made of chopped carbon fiber reinforced epoxy resin (SCF / EP). And a phase-regulated two-dimensional periodic array is formed. By arranging a three-layer structure of the metal reflecting layer, the Fe3O4 (at) RGO / epoxy composite wave-absorbing layer and the chopped carbon fiber scattering layer, broadband absorption and directional scattering control of electromagnetic waves within the range of 2-18 GHz are achieved, a stealth function composite material system with dissipation and deflection dual-mechanism cooperative work is formed, the structure utilizes the patterning design of the scattering layer, and the structure has the advantages that the structure is simple, the structure is compact, and the application range is wide. On the basis of the generalized Snell's law, engineering regulation and control of the radar wave reflection direction are achieved by regulating and controlling the reflection phase difference between pattern units, reflection energy is effectively deviated from the main lobe direction of a radar receiver, and therefore the reflection signal intensity of a target in a radar detection system is reduced.

The invention relates to the technical field of data analysis state monitoring, in particular to a method for monitoring the curing state of a black phosphorene carbon nanotube epoxy resin composite material, which comprises the following steps: in the preparation process of the black phosphorene carbon nanotube epoxy resin composite material, collecting curing temperature data, processing and analyzing; obtaining a curing rate performance process coefficient according to the temperature data in the stirring, defoaming and curing processes; obtaining a composite material curing process trend coefficient according to the distribution condition of the curing rate performance process coefficient; obtaining a composite material curing process state offset coefficient according to the composite material curing process trend coefficient, and judging the curing state; and cooling and demolding: after curing is completed, cooling the material in the mold to room temperature, and demolding to obtain the black phosphorus alkene carbon nanotube epoxy resin composite material. Therefore, the preparation of the black phosphorus alkene carbon nanotube epoxy resin composite material is realized.

The invention relates to the technical field of rubber materials, in particular to a high-strength and low-dielectric-loss epoxy resin composite material and a preparation method thereof. The epoxy resin composite material is prepared from the following raw materials in parts by weight: 100 parts of modified epoxy resin, 12 to 18 parts of cyanate ester resin, 40 to 50 parts of aramid fiber, 10 to 15 parts of filler, 15 to 25 parts of flexibilizer, 1 to 6 parts of first curing agent and 1 to 2 parts of accelerant. The epoxy resin composite material with high strength and low dielectric loss has the advantages of high strength, good impact resistance, high breakdown strength, low dielectric constant and low dielectric loss. The requirements of high-voltage power transmission equipment insulation parts, high-frequency circuit substrates, spacecraft lightweight structural members and the like on the fields with strict requirements on mechanical strength and dielectric properties can be met; and the preparation method is simple and controllable, the production cost is relatively low, and large-scale production can be realized.

The invention relates to the technical field of anticorrosive coatings, in particular to a waterborne epoxy resin composite anticorrosive coating with MXene-NiO-PPy as filler and a preparation method of the waterborne epoxy resin composite anticorrosive coating. The invention discloses a water-borne epoxy resin composite anticorrosive coating taking MXene-NiO-PPy as a filler. The water-borne epoxy resin composite anticorrosive coating is prepared from a water-borne epoxy resin emulsion, a modified amine adduct curing agent, MXene-NiO-PPy, a microencapsulated corrosion inhibitor, a dispersing and leveling aid, nano cellulose, nano silicon dioxide aerogel powder and deionized water. The waterborne epoxy resin composite anticorrosive coating with MXene-NiO-PPy as a filler is prepared by pre-dispersing slurry, microencapsulating and stirring at a low speed, has physical shielding property, active chemical passivation property, excellent mechanical toughness and good construction performance, and effectively solves the problems that the traditional waterborne epoxy coating is insufficient in shielding property, easy to crack and only passive in protection.

The invention relates to a low-dielectric-loss high-thermal-conductivity epoxy resin composite material and a preparation method thereof, and the preparation method comprises the following steps: carrying out surface modification treatment on a thermal conductive filler: carrying out surface modification on the thermal conductive filler by adopting a chemical covalent bonding or physical adsorption mode, the heat-conducting filler is used for improving the compatibility of the filler and an epoxy resin matrix and reducing the interface thermal resistance, and comprises boron nitride with a two-dimensional sheet structure; epoxy resin, a curing agent and an optional modifier are evenly mixed, the epoxy resin is selected from epoxy resin with the low polarity characteristic, and the modifier comprises at least one of thermoplastic resin or elastomer. And the process is simple and controllable.

The invention relates to a marine epoxy resin composite material. The marine epoxy resin composite material is characterized by comprising the following components in parts by mass: 100 parts of epoxy resin, 20-30 parts of a curing agent, 100-120 parts of a reinforcing material, 2050 parts of hollow microsphere filler and 5-15 parts of a flame retardant, the epoxy resin is one or a mixture of two of bisphenol A type epoxy resin, bisphenol F type epoxy resin, polyphenol type glycidyl ether epoxy resin or aliphatic glycidyl ether epoxy resin. When in use, the marine epoxy resin composite material disclosed by the invention has the advantages of excellent comprehensive performance, corrosion resistance, flame retardance, water resistance, high strength, light weight and the like, still has excellent performance retention rate after being soaked in water for several days, and is more suitable for complex and severe working conditions on a ship.

The invention belongs to the technical field of polymer insulating materials, and particularly relates to an epoxy resin composite insulating material and a preparation method thereof. The composite material comprises the following components in parts by weight: 60-70 parts of epoxy resin, 5-8 parts of acetone, 12-15 parts of modified glass fibers, 1-2 parts of nano SiO2, 5-8 parts of polyurethane microspheres, 10-12 parts of micron Al2O3, 2-3 parts of epoxy monomer microcapsules, 8-10 parts of a curing agent and 3-5 parts of a modifier. The material cost is effectively reduced on the premise of ensuring the insulating strength, the thermal conductivity and the mechanical property, and the influence of the high-viscosity nano filler on the processing fluidity is reduced by compounding the micron Al2O3 and the nano SiO2; nano SiO2 is directionally deposited on the surface of the fiber through electrostatic spraying, a local high-concentration nanophase is formed in an interface area, the high-proportion nano SiO2 adding requirement of a traditional matrix is replaced, the total nano material dosage is effectively reduced, and the cost is remarkably reduced.

The invention relates to an epoxy resin composite insulating material and a preparation method and application thereof, and belongs to the technical field of insulator equipment. The epoxy resin composite insulating material is prepared from the following raw materials: epoxy resin, nano filler, a surface modifier, aluminum oxide particles, a flame retardant, an organic solvent, a curing agent and an accelerant. The nanofiller is at least one of the following nanoscale materials: titanium dioxide, graphene oxide, carbon nitride, zinc oxide, boron nitride and silicon dioxide; the surface modifier is a silane coupling agent and is used for surface modification of the nano filler; the flame retardant is at least one of a phosphorus flame retardant, a nitrogen-phosphorus synergistic flame retardant and a brominated flame retardant. The insulating material provided by the invention has high thermal stability, high insulativity and carbon precipitation inhibition capability, can effectively inhibit carbon precipitation of epoxy resin under the action of thermal and electric stress, and has good comprehensive performance.

The invention discloses a durable modified epoxy resin composite coating and a preparation method thereof. The durable modified epoxy resin composite coating comprises a component A and a component B, the component A comprises the following components in parts by mass: 100 parts of epoxy resin, 15 parts of mica, 20 parts of glass flakes, 10 parts of mica iron oxide, 5 parts of zinc phosphate, 3 parts of a penetrant and 10 parts of a solvent; the component B is prepared from the following components in parts by mass: 20 parts of doped polyaniline, 100 parts of N-methyl pyrrolidone and 30 parts of a modified amine curing agent. The prepared durable modified epoxy resin composite coating provides more durable surface protection for concrete structures of expressways and bridges, the salt freezing resistance and chloride ion corrosion resistance of the concrete structures subjected to modified epoxy resin surface treatment can be remarkably improved, and the durability of the concrete structures is enhanced.

The invention discloses a continuous aramid fiber reinforced epoxy resin composite material and a preparation method thereof, and belongs to the technical field of composite materials. The composite material is obtained by heating and curing continuous aramid fibers modified by a benzoxazine-containing waterborne polyurethane emulsion sizing agent and epoxy resin, the waterborne polyurethane emulsion sizing agent containing benzoxazine is prepared from diisocyanate, long-chain diol, 2, 2-dimethylolpropionic acid, dihydric alcohol containing benzoxazine and triethylamine according to the molar ratio of 1: (0.1 to 0.5): (0.1 to 0.3): (0.3 to 0.4): (0.1 to 0.3) through reaction. The benzoxazine-containing waterborne polyurethane sizing agent is used for modifying the aramid fibers, and benzoxazine is crosslinked with the aramid fibers and the epoxy resin during ring opening polymerization, so that the interface bonding property between the aramid fibers and the epoxy resin can be remarkably improved, and the mechanical property of the composite material can be effectively improved; the application field of the aramid fiber composite material is expanded.

The invention provides a tank-type circuit breaker AC / DC voltage withstand test electric field improvement method and device and a storage medium, and the device comprises an epoxy resin composite insulator embedded with an aluminum alloy spherical shell, and the spherical shell achieves the equipotential connection with the wire outlet end of a circuit breaker sleeve through conical surface cooperation. And the curvature radius is optimally designed to transfer an electric field peak value to an equatorial region. The spherical shell is coated with a semi-conductive silicone rubber layer with resistivity distributed in a gradient manner, and the outer insulator forms a multi-stage umbrella skirt structure. During installation, dimensional tolerance self-adaptive compensation is achieved through a cam locking mechanism of the floating flange, and the belleville spring set provides axial sealing pre-tightening force. The method comprises four core processes of composite structure coaxial installation, gradient electric field regulation and control, dynamic sealing locking and electric heating state verification. According to the scheme, an electrode structure is reconstructed to suppress point discharge, space charge accumulation is blocked through dielectric layer resistivity gradient distribution, the creepage distance along the surface is prolonged through the multi-stage umbrella skirts, and the technical defect that the safety distance is shortened by a traditional grading ring is overcome.

The invention discloses a high-thermal-conductivity graphene fiber composite material based on conjugate interface adaptation and a preparation method thereof, and relates to the technical field of fiber composite materials. According to the method, a conjugated interface conformation adaptive design of an interface phase is realized by utilizing a functionalized phenylsilane coupling agent through active sites of topological wrinkles on the surface of a graphene fiber, and a molecular conjugated interface layer with an efficient heat conduction path and a strong mechanical interlocking effect is formed. According to the graphene fiber / epoxy resin composite material treated by the method, the interfacial shear strength can reach 90 MPa, the in-plane heat conductivity coefficient reaches up to 550 W / mK, and the performance retention rate exceeds 98% after 100 times of thermal shock cycles. By regulating and controlling the adaptability of the fiber surface wrinkle structure and the interface molecule conformation, the problem that a traditional carbon fiber modification method is insufficient in applicability on graphene fibers is solved, the thermal and mechanical property synergistic effect of the graphene fiber composite material is remarkably improved, and the graphene fiber composite material is suitable for a stable advanced thermal management system in an extreme thermal environment.

The invention discloses an efficient anticorrosive coating and a preparation method thereof, and relates to the technical field of coatings. The high-efficiency anticorrosive paint is prepared from a crosslinked membrane modified phytic acid loaded aluminum MCM-41 mesoporous silica composite synergistic filler, a polyurethane / epoxy resin composite emulsion system, titanium dioxide, a BYK-190 dispersing agent, a BYK-021 defoaming agent, a BYK-358N flatting agent, a BYK-425 thickening agent, hydroxyethyl cellulose and deionized water. A cross-linked membrane modified phytic acid loaded aluminum MCM-41 mesoporous silica composite synergistic filler is uniformly dispersed and deeply embedded into a polyurethane / epoxy resin composite emulsion system, countless chemical anchor points are established between the filler and a base material, and the interface bonding property with a resin system is also enhanced, so that the adhesive force of the coating is greatly improved, and meanwhile, the coating has the advantages that the service life of the coating is prolonged, and the service life of the coating is prolonged. And an active and passive three-dimensional protection system formed by the two is used for remarkably improving the corrosion resistance of the coating in the action modes of intelligent response, active repair and physical barrier.

A medium-low temperature degradation recovery method of vacuum infusion epoxy resin for wind turbine blades and a composite material thereof belongs to the field of waste epoxy resin recovery, and comprises the following steps: mixing waste epoxy resin or a waste epoxy resin composite material with a solvent according to a mass ratio of 1: (1-10), and carrying out ultrasonic-assisted swelling pretreatment at 30-100 DEG C for 1-12 hours; the method comprises the following steps: drying the waste epoxy resin or the composite material thereof subjected to ultrasonic-assisted swelling pretreatment, mixing the dried waste epoxy resin or the composite material thereof with a catalytic degradation liquid according to a mass ratio of 1: (1-10), heating and refluxing under the protection of nitrogen at 60-120 DEG C, and reacting for 1-36 hours until the resin completely disappears, thereby completing the degradation. According to the invention, ultrasonic-assisted swelling is carried out, bubbles are generated during liquid vibration, and then the bubbles are rapidly expanded and broken to release energy under the change of sound pressure, so that an epoxy resin cross-linked network becomes loose and disordered; meanwhile, diffusion of solvent molecules is accelerated through vibration, the permeation efficiency is improved, and a good precondition is provided for further breaking chemical bonds to degrade epoxy resin subsequently.