1258 results about "Resin composite" patented technology

The invention belongs to the technical field of gel materials, and particularly relates to aerogel powder for polyolefin modification and a preparation method and application thereof. The preparation method of the aerogel powder comprises the following steps: (1) preparing aramid nanofiber dispersion liquid; (2) preparing a polypyrrole coated aramid nanofiber dispersion liquid; (3) mixing polyamide acid and the polypyrrole coated aramid nanofiber dispersion liquid, and then carrying out partial imidization and solvent exchange to prepare hydrogel; and (4) carrying out freeze drying, thermal imidization and crushing to obtain the aerogel powder for polyolefin modification. The aerogel powder is a porous solid material formed by forming one-dimensional composite fibers from aramid nanofibers and polypyrrole and combining the one-dimensional composite fibers with polyimide resin. The aerogel powder and polyolefin resin are compounded to obtain the polyolefin resin composite material with high strength and antistatic property, and the polyolefin resin composite material can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention belongs to the technical field of fiber materials, and particularly relates to a modified aramid nanofiber as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing an aramid nanofiber dispersion liquid; (2) modifying the aramid nanofiber by using POSS; and (3) carrying out in-situ polymerization on polypyrrole on the surface of the aramid nanofiber. POSS (polyhedral oligomeric silsesquioxane) has a relatively large volume exclusion effect, the template effect of long-chain alkyl quaternary ammonium salt can be influenced by scattered adhesion of POSS on the surface of aramid nanofiber, uneven polymerization of pyrrole monomers is caused, and formation of a rough structure on the surface of the fiber is facilitated. According to the invention, the polypyrrole-coated aramid nanofiber with a coarse structure is used as a polyolefin modified material, so that the problem of low interfacial force existing in a common filler is solved, and the polyolefin resin composite material with high strength and antistatic property is obtained and can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

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 invention provides a high-temperature-resistant carbon fiber reinforced phenolic resin composite material and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out high-temperature oxidation treatment on carbon fibers; secondly, carrying out surface modification on the carbon fibers by using a chemical modifier; then mixing the modified carbon fiber, an antioxidant and a dispersing agent to prepare slurry; performing vacuum filtration on the prepared slurry, and drying to obtain a carbon fiber blank; preparing a phenolic resin infiltration solution, and impregnating the carbon fiber blank with the phenolic resin infiltration solution; and finally, carrying out mold pressing and curing to obtain the high-temperature-resistant carbon fiber reinforced phenolic resin composite The preparation method is simple in required equipment, convenient to operate, stable in process, high in production efficiency and suitable for large-scale industrial production. According to the high-temperature-resistant carbon fiber reinforced phenolic resin composite material prepared by the preparation method, the bonding property between the carbon fiber and the phenolic resin is improved, certain toughness and strength are provided, and meanwhile, the high-temperature-resistant carbon fiber reinforced phenolic resin composite material has the advantages of ablation resistance, good oxidation resistance in a high-temperature environment and the like.

The invention discloses a preparation method of a Mg (OH) 2 / polydopamine multi-scale synergistic modified carbon fiber / epoxy resin composite material, and relates to the technical field of composite material preparation, and the preparation method comprises the following steps: S1, preparing a material solution and equipment; s2, preparation of the polydopamine modified carbon fiber; s3, preparing the Mg (OH) 2 / polydopamine multi-scale synergistic modified carbon fiber; and S4, preparing the Mg (OH) 2 / polydopamine multi-scale synergistic modified carbon fiber / epoxy resin composite material. Nano Mg (OH) 2 is introduced to the surface of the polydopamine modified carbon fiber by taking a coordinate bond as an acting force, so that an organic-inorganic combined three-dimensional structure interface layer is formed, and meanwhile, the wettability and the bonding effect between the carbon fiber and a matrix are improved by the method, so that the bending property of the composite material is more excellent; the method for introducing nano Mg (OH) 2 through coordinate bonds is simple, rapid and efficient, the original structure of the carbon fiber cannot be damaged, and complex operations such as chemical grafting and oxidation treatment are avoided.

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 graphene fiber and resin composite material with high thermal conductivity. The graphene fiber and resin composite material comprises continuous graphene fiber filaments, wherein the surfaces of the continuous graphene fiber filaments are coated with a sizing agent; the surface of the graphene fiber is coated with the modified epoxy resin; the preparation method comprises the following steps: preparing continuous and uniform graphene oxide fiber filaments through a wet spinning technology; fully reducing the graphene oxide fiber through a chemical reduction method; performing graphitization treatment on the graphene oxide fiber subjected to chemical reduction at ultrahigh temperature to obtain graphene fiber; then the graphene fiber laying layer is put into a mold coated with demolding wax, each layer of fiber is fixed with epoxy resin, and demolding cloth covers the graphene fiber laying layer after the graphene fiber laying layer is finished and is used for demolding and absorbing redundant resin; the graphene fiber / resin composite material prepared by the preparation method disclosed by the invention not only has good heat-conducting property, but also has relatively good interface property.

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 the technical field of preparation of composite materials, and discloses a method for improving a carbon fiber and aluminum-based resin composite material by utilizing temperature regulation and control, which comprises the following steps: S1, forming a multifunctional interface layer on the surfaces of carbon fibers and aluminum-based materials, and enhancing the interface bonding force of the interface layer through the combination of various nano materials and a layered structure; s2, performing resin impregnation by using a self-temperature-regulating resin system containing temperature-sensitive microcapsules, wherein the system automatically regulates the curing temperature and pressure within a specific temperature range; s3, in the curing process, a multi-stage phase change material is adopted, and internal temperature distribution is regulated and controlled through thermal response behaviors at different temperature stages; and S4, optimizing the flowability and permeability of the resin through an ultrasonic-assisted technology. By introducing the multifunctional nano material and the multi-stage phase change material, the conductivity, the mechanical strength and the thermal stability of the carbon fiber and aluminum-based resin composite material are remarkably improved.

The invention relates to the technical field of polyurethane pultrusion, in particular to a preparation method of a polyurethane pultrusion resin composite material, which comprises the following steps: drawing glass fiber into a glue dipping tank filled with polyurethane resin for dipping; heating the impregnated glass fiber in a pre-forming mold to obtain a pre-cured gel forming body; when it is judged that preparation of the pre-cured gel forming body does not meet the preset standard according to the scattering intensity standard deviation of the pre-cured gel forming body, preparation parameters are adjusted; the pre-cured gel forming body meeting the preset standard is put into a pultrusion mold for pultrusion, and a cured forming body is obtained; when it is judged that the preparation of the cured molded body does not meet a preset standard according to the average ripple amplitude, determining an adjustment strategy for the preparation of the cured molded body to do not meet the standard according to the curvature variance of the surface lines; and pulling and naturally cooling the cured molded body meeting the preset standard to obtain the polyurethane resin composite material. The preparation efficiency of the resin composite material is improved.

The invention relates to the technical field of high polymer materials, in particular to a resin composite material with flame-retardant and insulating properties and a preparation method thereof. The problems that in the prior art, a resin composite material is poor in flame retardance and insufficient in insulating property are solved. The preparation method comprises the following steps: modifying epoxy resin with maleic anhydride and carboxyl modified nitrile rubber to obtain modified epoxy resin; a modified flame-retardant system is obtained by processing the carbon nanotube loaded melamine polyphosphate, the triphenyl phosphate and the magnesium hydroxide; the preparation method comprises the following steps: mixing modified epoxy resin and a modified flame-retardant system, adding modified nano silicon dioxide through a supercritical fluid technology and ultrasonic dispersion, and performing staged curing through a curing agent to obtain a resin composite material; the flame retardant property of the composite material is improved through the synergistic effect of the flame retardant and loading of the carbon nanotubes; and through the synergistic effect of the modified nano silicon dioxide and the carbon nanotubes, the insulating property of the composite material is improved.

The invention discloses a silicon nitride ceramic-based composite material and a preparation method thereof, and relates to the technical field of silicon nitride ceramics. The silicon nitride ceramic-based composite material is prepared from silicon dioxide coated modified boron nitride and resin composite phase change microcapsules, Si3N4-C coated Al2O3 core-shell fiber aerogel, nano yttrium oxide and polyvinyl butyral, the silicon dioxide coated modified boron nitride and resin composite phase change microcapsules are stably attached to the surface of the Si3N4-C coated Al2O3 core-shell fiber aerogel in a chemical bonding and mechanical interlocking mode, the interface bonding strength is enhanced, the risk of phase separation is reduced, the combination effect of the silicon dioxide coated modified boron nitride and resin composite phase change microcapsules and the Si3N4-C coated Al2O3 core-shell fiber aerogel is better exerted, and the composite phase change effect of the silicon dioxide coated modified boron nitride and resin composite phase change microcapsules is improved. According to the present invention, the fracture toughness can be improved through fiber toughening, aerogel pore and microcapsule stress dispersion, the high temperature resistance can be improved through the low thermal conductivity of the aerogel and the heat absorption effect of the microcapsule, the mechanical property of the silicon nitride can be significantly improved through multiple ways and multiple modes, and the high temperature resistance can be effectively enhanced.

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 discloses an in-situ biomineralizable mineral-PHA water-based seed coating based on microphase separation and soil water potential response and a preparation method and application thereof, and belongs to the technical field of green coatings, the in-situ biomineralizable mineral-PHA water-based seed coating comprises a structural mineral skeleton, a PHA and resin composite matrix and a pore-forming disintegrating agent. According to the invention, a resin enrichment layer and island microphase structure is innovatively constructed, and the contradiction between poor wear resistance and difficult disintegration of a bio-based material is effectively solved. Compared with the prior art, the wear-resistant and dust-reducing coating has the advantages that the wear-resistant and dust-reducing performance far better than that of the traditional PHA coating is realized by utilizing an interface enhancement effect under the condition of equal or even lower polymer dosage; meanwhile, the coating is endowed with a sensitive soil water potential response'switch ', so that dry-state tough seed protection and wet-state rapid disintegration are ensured, and germination is not hindered. Organic components of the composition can be biodegraded in aerobic soil, inorganic components are natural minerals, the environmental compatibility is good, the composition has the advantages of high performance and low cost, and an excellent seed treatment scheme is provided for green agriculture.

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.

The invention discloses a cement-based surface super-hydrophobic coating as well as a preparation method and a use method thereof. The cement-based surface super-hydrophobic coating comprises a prime coating and a surface coating, the prime coating is a coupling agent modified fibrous clay / resin composite material, the surface coating is a coupling agent modified SiO2 / low surface energy substance modified resin composite material, the contact angle of the cement-based surface super-hydrophobic coating is 155-159 degrees, and the impact strength is 50-60 kg.cm. Fibrous clay and high-permeability alkali-resistant resin are mixed to serve as a bottom layer of the coating, silane modified SiO2 and a low-surface-energy substance modified resin material are compounded to serve as a surface layer, the surface layer is coated on the surface of a cement-based material, and a nanofiber structure of clay is combined with the high-permeability alkali-resistant resin, so that the coating is endowed with excellent toughness, adhesive force and alkali resistance; and the coating is endowed with super-hydrophobicity and wear resistance by virtue of a bulge structure formed by bonding dense SiO2 on the surface through resin.

The invention provides an ultra-high molecular weight polyethylene fiber resin composite material interface regulation composition which comprises the following components in parts by weight: 100 parts of ultra-high molecular weight polyethylene fiber, 12 parts of polyethylene, 0.6 part of a compatilizer, 0.03 part of an initiator, 2.5 parts of gallic acid, 1 part of tetraethylenepentamine and 5 parts of nano silicon dioxide. The compatilizer is used for melt grafting with polyethylene, and the initiator is used for initiating melt grafting of the compatilizer and polyethylene. The invention also provides a method for carrying out interface regulation and control by adopting the interface regulation and control composition and an ultra-high molecular weight polyethylene fiber resin composite material prepared by the method. The ultra-high molecular weight polyethylene fiber resin composite material obtained by carrying out interface regulation and control treatment on the ultra-high molecular weight polyethylene fiber resin composite material interface regulation and control composition has a good interface state, excellent mechanical properties and good impact resistance.

The invention discloses a degradable epoxy resin composition, which is prepared from the following components in parts by weight: 40 to 100 parts of epoxy resin, 0 to 20 parts of modified epoxy resin and 0 to 60 parts of degradable epoxy resin. The degradable winding resin composite material prepared from the degradable epoxy resin composition can realize degradation and stripping of reinforced fibers under mild conditions, realizes recycling, and reduces environmental protection pressure. Under the combined action of the degradable epoxy resin composition, the anhydride curing agent and the defoaming agent, the epoxy resin can be applied to a winding process, and the prepared composite material is excellent in boiling resistance and high temperature resistance. The degradable winding resin composite material also has a flame retardant effect, and has good tensile strength and shear strength.

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 discloses resin composite liquid with dual self-repairing and high ethanol solvent wiping resistance as well as a preparation method and application of the resin composite liquid, and belongs to the technical field of polyurethane emulsion coatings. Aiming at the problems that an existing waterborne polyurethane coating is poor in ethanol resistance due to residual carboxyl / hydroxyl of a hydrophilic chain extender and the self-repairing efficiency of a single dynamic bond is low, a metal ion buffer solution is added into a hydroxyl-terminated polyurethane emulsion to coordinate with the carboxyl of the hydrophilic chain extender, so that a hydrophilic group is closed, and the crosslinking density is increased; meanwhile, a boric acid compound is introduced to form dynamic boric acid ester bonds with residual hydroxyl groups of the system, and hydrophilic groups in the system are consumed while a dual self-repairing network is constructed. The coating prepared by the invention has good self-repairing and ethanol wiping resistance.

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

The invention relates to an epoxy resin composite material and application thereof, and relates to the technical field of epoxy resin materials.The preparation method of the epoxy resin composite material comprises the following steps that epoxy resin, a curing agent and an accelerant are stirred and mixed, and a first mixture is obtained; stirring and mixing the first mixture and a composite reinforcing material to obtain a second mixture; and carrying out vacuum defoaming and curing on the second mixture to obtain the epoxy resin composite material, wherein the composite reinforcing material is obtained by treating sulfydryl modified fibers and imidazolium ionic liquid through a silane coupling agent. The composite reinforcing material obtained by treating the sulfydryl modified fiber and the imidazolium ionic liquid through the silane coupling agent is constructed and introduced into an epoxy resin matrix, so that the heat-conducting property and the mechanical property of the obtained epoxy resin composite material are remarkably improved, and the defects in the prior art are overcome.

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 discloses a low-VOC (volatile organic compound) and high-conductivity thermoplastic resin composite material and a preparation method thereof. The thermoplastic resin composite material consists of the following components in parts by weight: 90-110 parts of thermoplastic resin, 10-16 parts of functional filler and 0.1-0.5 part of antioxidant, the functional filler is a doped mesoporous magnesium oxide / polyaniline composite material. The functional filler is adopted to modify the thermoplastic resin, so that small molecular substances in VOC can be adsorbed, and the VOC performance of the thermoplastic resin composite material is improved. The formation of a polyaniline gel conductive network structure can be promoted, and the conductivity of the thermoplastic resin composite material is enhanced. The material can be used in the fields of automobile and household appliance materials, and has excellent application prospects.

The invention relates to the technical field of cables, in particular to fire-resistant silicone rubber, a preparation method thereof and a cable, and the fire-resistant silicone rubber is composed of a matrix resin composite system, a composite flame-retardant system, a nanometer enhancement and smoke suppression system and an interface and vulcanization system, the matrix resin composite system comprises methyl vinyl silicone rubber, vinyl silicone rubber and macromolecular polyethylene, the composite flame-retardant system comprises nano aluminum hydroxide, zinc borate and transition metal nitride, and the nano enhancement and smoke suppression system comprises modified nano silicon dioxide, organic montmorillonite and zinc molybdate. The interface and vulcanization system comprises a silane coupling agent, dicumyl peroxide and a platinum catalyst. Therefore, the problems that in the prior art, fire resistance is insufficient, toxic gas is released during combustion, the mechanical property is poor, machining is complex, and environment friendliness is low are solved.

A vehicle body pillar structure uses a fiber-reinforced resin composite material. The vehicle body pillar structure includes two tubular portions made of a fiber-reinforced resin and arranged side by side in a vehicle body front-rear direction of a vehicle. Each of the two tubular portions extends in a direction of an axis along a vehicle body height direction of the vehicle. The vehicle body pillar structure has a first region and a second region. In the first region, the two tubular portions are joined to each other on an upper side in the vehicle body height direction. In the second region, the two tubular portions diverge and are spaced apart from each other on a lower side in the vehicle body height direction. Each of the two tubular portions includes a metal plate provided over the first region and the second region.

The invention provides a polymer foam product, a preparation method thereof and a shoe material, and belongs to the technical field of 3D printing. The preparation method comprises the following steps: firstly, carrying out melt extrusion on a thermoplastic resin mixed material, and carrying out 3D printing on the obtained thermoplastic resin composite material according to a planned path to obtain a polymer workpiece; the preparation method comprises the following steps: firstly, soaking a polymer workpiece in a solvent, and finally, soaking the soaked polymer workpiece in supercritical fluid, and foaming to obtain a polymer foam product. By adopting the method provided by the invention to prepare the polymer foam product, the polymer foam product with low apparent density, low compression permanent deformation, high rebound resilience and high tensile strength can be obtained.

The invention discloses a high-performance modified resin material and a preparation method thereof, and belongs to the technical field of resin composite material preparation. The high-performance modified resin material is prepared from a main agent, a curing agent and nano filler, the main agent is prepared from 70 to 100 parts of bisphenol epoxy resin, 20 to 40 parts of dopamine modified epoxy resin, 5 to 15 parts of diglycidyl ether, 3 to 15 parts of flame retardant, 0.3 to 1 part of anti-settling agent, 0.05 to 0.3 part of defoaming agent and 0.1 to 0.5 part of pigment; the curing agent is prepared from the following components in parts by weight: 15-35 parts of a rapid curing agent, 10-30 parts of a toughening curing agent, 5-15 parts of a dopamine modified amine curing agent, 0.5-3 parts of an accelerant and 0.1-0.5 part of an antioxidant; and the nano filler is nano-particle coated PDA (potato dextrose agar). Amino of dopamine reacts with epoxy group, catechol is oxidized to generate a quinoneform structure, thiol-epoxy click reaction is catalyzed, and the material can be rapidly cured at low temperature; a flexible chain (-S-CH-CH-) of polymercaptan and a polyether chain of amine-terminated polyether are synergistically toughened, so that the toughness and impact resistance of the material can be improved.

A vehicle body pillar structure using a fiber-reinforced resin composite includes two or more tubular members and a metal plate. The two or more tubular members are made of a fiber-reinforced resin and have respective axes along a vehicle body height direction. The metal plate is disposed between two of the two or more tubular members arranged in a vehicle body front-rear direction, and extends along the vehicle body height direction and a vehicle width direction.

The invention relates to the technical field of epoxy resin composite materials, and particularly discloses an epoxy resin composition, a preparation method and an epoxy glass cloth laminated board. The epoxy resin composition is prepared from the following components in parts by weight: 100 parts of epoxy resin, 10 to 20 parts of hydroxyl-containing organic silicon, 3 to 8 parts of maleic anhydride, 0.5 to 2 parts of vinylidene compound, 5 to 15 parts of 4, 4 '-bismaleimide diphenylmethane and 30 to 60 parts of curing agent. The hydroxyl-containing organic silicon and the 4, 4 '-bismaleimide diphenylmethane are crosslinked with the epoxy resin, so that the heat resistance of the epoxy resin is improved, and the toughening effect on the epoxy resin is achieved.