263 results about "Epoxy resin composite" patented technology

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 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 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 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.

The invention discloses a hyperbranched flame retardant as well as a preparation method and application thereof. The flame retardant is prepared by the following steps: dehydrating and pre-polymerizing a boron-containing component (such as tetrahydroxy diborane) and dihydric alcohol (such as 1, 3-propylene glycol), and condensing with trihydroxymethyl phosphine oxide. 4 parts of the flame retardant is added into epoxy resin, phosphorus-containing free radicals can be released in a gas phase for quenching and smoke suppression, a compact boron-containing expanded carbon layer is formed in a condensed phase, and synergistic flame retardance is achieved. The hyperbranched structure can be embedded into an epoxy network, synchronous reinforcement and toughening are achieved, the impact strength is improved by 123.5%, and the tensile strength is improved by 47.7%. The flame retardant has efficient flame retardance (the limit oxygen index is 33.9%, UL-94V-0 level), high transparency and excellent mechanical properties, and is suitable for epoxy resin composite materials in the fields of electronic packaging, aerospace and the like.

The invention discloses a phosphorus-nitrogen macromolecule modified MOFs flame retardant and an epoxy resin composite material and a preparation method thereof, and belongs to the technical field of flame-retardant composites.The nanometer flame retardant takes NH2-MIL-125 as a matrix, a phosphorus-chlorine bond compound and an amido compound are sequentially grafted, and in-situ polymerization is conducted to form a phosphorus-nitrogen coating layer; the composite material is prepared from 77.15 to 80.44 parts of epoxy resin, 16.85 to 17.56 parts of a curing agent and 1 to 6 parts of M (at) F-PZN through high-temperature curing. When the addition amount of the flame retardant is less than or equal to 6wt%, the peak value of the heat release rate of the composite material is reduced by 51.6%, the maximum smoke production rate is reduced by 51.5%, the tensile strength is improved by 62.2% compared with that of pure epoxy when the flame retardant is added by 2wt%, synergistic improvement of flame retardance, smoke suppression, toxicity reduction and mechanical properties is realized, and the flame retardant is suitable for the fields of electronic packaging, aerospace and the like.

The invention relates to the technical field of sound insulation materials, in particular to flame-retardant epoxy resin composite diatomite sound insulation cotton and a preparation method thereof. The flame-retardant epoxy resin composite diatomite sound insulation cotton is prepared from epoxy resin, diatomite, a composite flame retardant, a coupling agent, a curing agent, a diluent, a foaming agent and a charring agent. The composite flame retardant at least comprises ammonium polyphosphate and melamine; the coupling agent is a silane coupling agent or a titanate coupling agent; the curing agent is methyl tetrahydrophthalic anhydride; the diluent is n-butyl glycidyl ether; the foaming agent is azodicarbonamide; the charring agent is pentaerythritol. By optimizing the diatomite modification process and combining physical dispersion and chemical modification means, the compatibility of the diatomite and the epoxy resin is greatly improved, the pain point of filler agglomeration in the traditional process is thoroughly solved, the porous sound insulation potential of the diatomite is fully released, and the sound absorption and sound insulation performance of the material is qualitatively improved.

The invention discloses a phosphorus-nitrogen synergistic flame-retardant benzoxazine / epoxy resin composite material and a preparation method thereof. Firstly, a phenolic compound and DOPO react to generate an intermediate product, and then the intermediate product, an amine compound and paraformaldehyde are subjected to a dehydration condensation reaction to generate the phosphorus-nitrogen synergistic flame retardant benzoxazine. The phosphorus-nitrogen synergistic flame-retardant benzoxazine is added into epoxy resin for thermocuring to obtain the composite material. The prepared benzoxazine flame retardant contains phosphorus and nitrogen elements, the nitrogen-based flame retardant has the advantages of low pollution, low smoke, good compatibility with EP and the like, and a quenching effect, a dilution effect and a carbon layer barrier effect can be generated in the combustion process to prevent further combustion of flames. The composite material has better flame retardant property, can effectively reduce the risk of fire hazard caused by overheating or short circuit of equipment, and ensures the safe and stable operation of energy equipment.

The invention discloses a preparation method of a silicon dioxide-epoxy resin composite material, the acoustic impedance of the composite material is controlled by adjusting the volume fraction of the silicon dioxide-epoxy resin composite material, an ultrasonic transducer prepared by utilizing the composite material and a preparation process thereof, and an imaging system designed by utilizing the ultrasonic transducer. By designing the matching layer and the backing layer with specific acoustic impedance, seamless fusion of ultrasonic imaging and photoacoustic imaging is realized, the transducer has ultrahigh sensitivity, broadband characteristic and high optical transparency, shows bimodal imaging capability of high contrast and high resolution, and solves the problem that a traditional transparent ultrasonic transducer is insufficient in acoustic performance.

The invention belongs to the technical field of functional composite materials, and particularly relates to an all-organic epoxy resin composite material as well as a preparation method and application thereof. The method comprises the following steps: S1, heating, melting and blending epoxy resin and phenolic hydroxyl polyphenyl ether to obtain a composite system; s2, adding a curing agent and a catalyst into the composite system, heating, stirring, reacting, vacuumizing, defoaming, casting the obtained mixed solution into a mold, curing, cooling and demolding to obtain the all-organic epoxy resin composite material. The heat conductivity coefficient of the obtained composite material is improved by 44.2% compared with that of pure epoxy resin, and the thermal expansion coefficient is reduced by 32.8%. The method is mild in condition, short in technological process, low in energy consumption and suitable for large-scale production, an innovative thought and an effective strategy are provided for development of a high-performance all-organic electronic packaging material, and silicon-free and ceramic-free all-organic upgrading of the packaging field is expected to be promoted.

The invention provides a water-borne epoxy resin composite coating and a preparation method thereof, and the water-borne epoxy resin composite coating comprises the following components in parts by mass: 70-90 parts of a water-borne epoxy emulsion component A; 10-30 parts of a curing agent component B; wherein the component A of the waterborne epoxy emulsion is prepared from the following raw materials in parts by mass: 50 to 70 parts of self-emulsifying epoxy resin, 5 to 10 parts of hydrophilic modifier, 15 to 25 parts of pigment filler, 2 to 5 parts of dispersion stabilizer, 1 to 3 parts of cosolvent and 5 to 10 parts of deionized water. Self-emulsifying modification of resin molecules is realized by adopting nonionic polyether grafted self-emulsifying epoxy resin and matching with a hydrophilic modifier with a specific hydroxyl value, an emulsifier does not need to be added, and the viscosity of a coating system is reduced from the molecular level, so that the solid content of the component A of the waterborne epoxy emulsion is more than or equal to 70%, the viscosity is less than 200mPa. S, and the technical bottlenecks of high solid content and low viscosity are broken through; and the requirement for single-time thick coating construction is met, the construction efficiency is greatly improved, and construction period prolonging and cost increasing caused by multiple times of construction are avoided.

The invention belongs to the technical field of heat-conducting composite materials, and discloses a heat-conducting composite material which is a quartz fiber felt matrix reinforced epoxy resin composite material. The epoxy resin composite material is prepared from the following components in parts by mass: 100 parts of epoxy resin, 20 to 80 parts of epoxy group grafted aluminum oxide microspheres, 10 to 50 parts of hydroxyl-rich boron nitride nanosheets, 4 to 10 parts of a curing agent and 0.3 to 1 part of an accelerant. The surface modifier with an epoxy functional group is adopted to eliminate the interface thermal resistance of an inorganic micro-nano composite structure (spherical and lamellar) material, the interface strength and fusion of the filler and a resin matrix are improved, the heat conductivity coefficient of the composite material can be efficiently improved, and the composite material shows high insulating property and mechanical property.

The invention relates to the technical field of fiber reinforced resin-based composite materials, and discloses a basalt fiber epoxy resin composite material as well as a preparation method and application thereof. Comprising the following steps: carrying out oxygen plasma treatment and dopamine bionic liquid deposition treatment on basalt fibers, dipping the basalt fibers in a mixed coupling agent solution, and coating the basalt fibers with nano TiO2 sol to obtain nano roughened basalt fibers; mixing bisphenol A epoxy resin, hydrogenated bisphenol A epoxy resin, hyperbranched polyesteramine and ionic liquid modified boron nitride nanosheets to obtain resin A; mixing an epoxy curing agent with a curing accelerator to obtain resin B; and mixing the resin A and the resin B to obtain a mixed material, and infiltrating the nano roughened basalt fibers in the mixed material to obtain the basalt fiber epoxy resin composite material. After the basalt fiber is subjected to bionic multi-stage interface treatment, the basalt fiber is matched with the modified epoxy resin, so that the interface strength, the mechanical property and the weather resistance of the composite material are remarkably improved, and the composite material has a relatively good application scene.

The application belongs to the field of super-hydrophobic materials, and discloses a diamond-UIO-66-(OH)2-epoxy resin composite super-hydrophobic coating as well as a preparation method and application thereof, which comprises the following steps: (1) adding epoxy resin and polyamide curing agent into an organic solvent for ultrasonic dispersion until the solution is clear and transparent to obtain an epoxy resin solution; the epoxy resin solution is pre-cured by spraying on a substrate surface to obtain an epoxy resin coating; (2) adding diamond and UIO-66-(OH)2 into an organic solvent for ultrasonic dispersion to obtain a diamond-UIO-66-(OH)2 suspension; (3) spraying the suspension on the epoxy resin coating and drying to obtain the super-hydrophobic coating. The coating has excellent super-hydrophobic performance and self-cleaning performance, the contact angle of water on the surface is as high as 154°, and the rolling angle is as low as 6.5°, so that the coating can be used in the fields of self-cleaning, oil-water separation, drag reduction, corrosion prevention and anti-icing, and has wide applicability.

The invention relates to an epoxy resin pouring type transformer with built-in microcirculation cooling channels and a heat dissipation method of the epoxy resin pouring type transformer, and belongs to the technical field of power transformers. The epoxy resin pouring type transformer comprises an iron core, a low-voltage winding, a high-voltage winding and a heat dissipation shell, the low-voltage winding and the high-voltage winding are completely impregnated and wrapped by an epoxy resin composite material through a vacuum pouring process, an integrated epoxy resin pouring body is formed after curing, and a three-dimensional communicated bionic microcirculation cooling channel network is arranged in the epoxy resin pouring body; the heat dissipation shell is in close contact with the outer surface of the epoxy resin pouring body through the high-heat-conductivity insulating medium. According to the invention, the heat dissipation efficiency can be remarkably improved, and a cooling medium (air) is directly guided to a microscopic area around the winding conductor through a three-dimensional communicated and tree-shaped fractal bionic microcirculation cooling channel network, so that the effective heat exchange area and the heat exchange strength are greatly increased, and internal heat can be accurately and efficiently taken away.

The invention discloses a modified red mud-epoxy resin composite coating as well as a preparation method and application thereof. The composite coating is prepared by mixing modified red mud serving as a functional filler with epoxy resin and a curing agent, the composite coating is applied to the surface of Q235 carbon steel as a bifunctional corrosion-resistant and biological fouling-resistant composite coating, and shows remarkable corrosion resistance and biological fouling resistance; the impedance radiuses of the composite material can respectively reach 8.37 * 10 < 9 > omega.cm < 2 > and 2.69 * 10 < 6 > omega.cm < 2 > after the composite material is soaked in a 3.5 wt% NaCl solution for 1 day and 60 days; besides, the red mud / epoxy resin composite coating generates an active substance (. O2 <->) through a photo-induced electron-hole pair and a redox reaction, so that growth of bacteria (such as escherichia coli and staphylococcus aureus) and algae (chlorella) can be effectively inhibited, and excellent biological fouling resistance is shown.

The application belongs to the field of epoxy resin composites, and specifically provides a high-strength low-density epoxy SMC composite material and a preparation method thereof, which is prepared by the following steps: S01. Taking a PVC core plate, gluing after grooving, then laying a fiber cloth, vacuumizing under negative pressure after film covering, then pouring a pre-impregnation liquid, and placing to obtain a pre-cured composite plate; S02. Taking the pre-cured composite plate, placing overnight after mold pressing treatment, and then obtaining after demolding and edge trimming treatment; the pre-impregnation liquid preparation step comprises the following: mixing an active diluent, an accelerator, modified microspheres and a filler, first adding an epoxy resin, stirring, then adding the remaining amount of epoxy resin, and then adding a curing agent and a demolding agent, and continuously mixing to obtain the pre-impregnation liquid; the modified microspheres are used as a pre-impregnation liquid additive component, and the prepared SMC composite material product has a density ≤1.57 g / cm 3 , an impact strength ≥84.5 KJ / m 2 , and good flame retardance.

The invention relates to the technical field of resin composite materials, in particular to a preparation method of a high-strength epoxy resin composite material for unmanned aerial vehicle structural parts, and the high-strength epoxy resin composite material comprises the following raw materials in parts by weight: 100-120 parts of bisphenol A epoxy resin, 80-90 parts of a curing agent, 1-1.5 parts of an accelerant, 20-25 parts of a composite additive, 3-8 parts of a silane coupling agent and 0.1-0.5 part of an antioxidant. According to the invention, mechanical support is provided through high strength and high modulus characteristics of boron nitride whiskers in the composite additive, surface impurities are removed through pretreatment, surface performance is optimized, the binding force between the boron nitride whiskers and resin is enhanced, cracks are deflected by the whiskers under external force, an expansion path is increased to consume energy, and meanwhile, zinc powder is coated by a complex of tannic acid and iron in the powder, so that the zinc powder is more stable in performance. Phenolic hydroxyl groups and epoxy resin form hydrogen bonds, interface bonding force is enhanced, local stress is dispersed, microcrack propagation is inhibited, and fracture toughness is improved.

The invention belongs to the technical field of epoxy resin flame retardance, and particularly relates to a phosphorus-nitrogen flame-retardant curing agent, preparation thereof and application of the phosphorus-nitrogen flame-retardant curing agent in epoxy resin. In order to prepare the flame-retardant curing agent with both flame retardance and curing, pentaerythritol and phosphorus oxychloride are subjected to a reaction to synthesize an intermediate pentaerythritol diphosphate diphosphoryl chloride; and reacting the intermediate with 4, 4-diaminodiphenylmethane to synthesize the phosphorus-nitrogen flame-retardant curing agent 4, 4-diaminodiphenylmethane pentaerythritol diphosphate. The phosphorus-nitrogen flame-retardant curing agent has good smoke suppression performance, can reduce the combustion rate, is low in cost and environment-friendly, and is mixed with epoxy resin for curing to obtain an epoxy resin composite material with a flame-retardant function, so that the flame-retardant performance of the epoxy resin composite material can be improved, and the fire risk can be reduced.

The invention relates to a method for co-processing low-flash-point low-calorific-value waste liquid in a cement kiln, and belongs to the technical field of environmental protection. The low-flash-point low-calorific-value waste liquid is conveyed to a pressure-stabilizing and flow-stabilizing tank and then is stably output to a low-pressure gasification preheater; the low-pressure gasification preheater is used for heating the waste liquid by utilizing low-grade waste heat of the cement kiln system and gasifying the waste liquid; the gas-liquid mixed phase is conveyed to a kiln head cover nozzle and a decomposing furnace nozzle through a special conveying pipeline, and heat energy is released and thoroughly decomposed; the inner wall of the special conveying pipeline is coated with a malonyl urea-epoxy resin composite coating; the malonyl urea-epoxy resin composite coating is prepared from epoxy resin, malonyl urea, methylbenzene, amino ferrocene and additional amino ferrocene; after the flue gas is co-treated by the cement kiln disclosed by the invention, the concentration of benzene and chlorobenzene in the flue gas is remarkably reduced, and the requirements of environment-friendly emission are met.

The invention discloses modified epoxy resin, a preparation method and application, and belongs to the field of epoxy resin, the modified epoxy resin comprises epoxy resin, a curing agent and a modifier, and the modifier is silicon dioxide / styrene core-shell particles with silicon dioxide as a core. According to the modified epoxy resin, the preparation method and the application, the silicon dioxide / styrene core-shell particles are creatively used as a toughening phase, the limitation of a traditional toughening method is broken through, and a brand new technical scheme is provided for development of a high-performance epoxy resin composite material.

The invention belongs to the technical field of high polymer materials, and particularly relates to a high-toughness epoxy resin composite material for electronic packaging and a preparation method thereof.The epoxy resin composite material is prepared from, by weight, 12-18 parts of modified epoxy resin, 3-7 parts of curing agent, 1-3 parts of MIL-53-AI, 0.05 part of silane coupling agent, 0.1 part of 2-methylimidazole and 78 parts of silica powder; single-terminated amino polyether is grafted on the side chain of epoxy resin to introduce a flexible chain, so that the toughness and flowability of the modified epoxy resin are effectively improved, and meanwhile, the modified epoxy resin and a surface-treated MOF porous framework MIL-53-AI form a macroscopic and microscopic dual stress buffer network; and the toughness and fatigue cracking resistance of the electronic packaging composite material are greatly improved on the basis of ensuring high heat resistance.

The invention relates to a negative dielectric constant polyaniline / epoxy resin composite material and a preparation method thereof. The preparation method comprises the following steps: step 1, pretreating polyaniline powder; step 2, pre-dispersing and mixing the pretreated polyaniline powder and bisphenol F epoxy resin; step 3, performing curing agent addition and degassing treatment on the pre-dispersed and mixed mixture; 4, the degassed mixture is subjected to mold filling and preliminary forming; step 5, carrying out electric field auxiliary curing on the primarily formed mixture; and step 6, carrying out post-treatment and sample preparation on the polyaniline / epoxy composite material subjected to electric field auxiliary curing. The dielectric property and the reliability of the composite insulating material can be remarkably improved.