26 results about "Epoxy matrix" patented technology

The invention provides a high-thermal-conductivity flexible epoxy composite material as well as a preparation method and application thereof, and belongs to the field of high polymer materials. The composite material disclosed by the invention is prepared by adding polydopamine modified BN and FG which are jointly used as fillers into an epoxy matrix and adopting polyether amine as a curing agent. The polydopamine modified BN and the FG are jointly used, so that a synergistic interaction effect can be achieved in the aspects of heat-conducting property, dielectric property and mechanical strength. The epoxy composite material disclosed by the invention can obtain excellent heat-conducting property, dielectric property and insulating property under the compatibility of specific raw materials. And when the curing agent with a long molecular chain is adopted, the epoxy composite material can obtain excellent flexibility, and the problem of brittleness of the existing epoxy composite material is solved. A research basis is provided for preparation and performance research of the flexible epoxy composite material, and the flexible epoxy composite material has a good application prospect.

The application provides an epoxy resin-based multistage particle grading carbon fiber reinforced low-resistance sealing paste and a preparation method thereof, and belongs to the technical field of sealing paste preparation; a multiscale synergistic and interface firm three-dimensional conductive network is constructed: firstly, a multiscale hybrid additive integrating two-dimensional graphene, one-dimensional conductive chain and zero-dimensional metal / carbon is prepared through multi-step in-situ synthesis and high-temperature pyrolysis, as a key bridge of the micro conductive network; meanwhile, the surface of the macro carbon fiber skeleton is modified by using a silane coupling agent, a "molecular bridge" is constructed to ensure strong chemical bonding between the carbon fiber skeleton and the epoxy matrix; the functional components and economic fillers are uniformly dispersed in the epoxy resin under high shear force to form a physical conductive network precursor, and when used, the network structure is locked in a firm three-dimensional polymer matrix through a crosslinking polymerization reaction induced by heat, so that a high-performance composite material with low resistivity and excellent comprehensive performance is obtained.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to a technique for the fabrication of laser-ablation targets used in atomic sources for QIP systems that are based on atomic-based qubits.

The invention relates to an epoxy resin composite material for offshore wind turbine equipment insulation and a preparation method thereof, and belongs to the technical field of offshore wind turbine equipment insulation materials. The preparation method of the epoxy resin composite material for offshore wind turbine equipment insulation comprises the following steps: performing plasma treatment on nano MgF2, dispersing the treated nano MgF2 in an activating solution to obtain a MgF2 dispersion liquid, and then adding an initiator and styrene for grafting reaction to obtain modified MgF2; and dissolving the modified MgF2 in a solvent to obtain a premixed solution, dispersing the modified epoxy matrix in the premixed solution, adding the curing agent and the accelerant, uniformly stirring, defoaming, curing, cooling and demolding to obtain the high-performance epoxy resin. The epoxy resin composite material for offshore wind turbine equipment insulation is excellent in hydrophobicity and insulativity, high in interface bonding strength and capable of adapting to the severe operation environment of offshore wind turbine wind power high humidity, high salt mist and strong vibration; the insulating material can be used for core insulating parts such as a new energy offshore wind turbine cabin high-voltage bus insulating support, a hub motor insulating bush and a submarine cable terminal insulating sealing element.

Described herein are syntactic foams comprising: (i) hollow filler particles; and (ii) an epoxy matrix; wherein, the epoxy matrix is characterized by an ordered microstructure comprising a plurality of vacancies that resides at interstices between the filler particles. The ordered microstructure of the syntactic foams provides the materials with lower densities and higher strengths compared with syntactic foams of the art. Methods of preparing the syntactic foams are additionally described.

The invention discloses a low-temperature fast curing ACF material for FOG hot-pressing binding and a liquid crystal display screen high-precision full-automatic FOG hot-pressing binding production process. The ACF material comprises the following components in parts by weight: 50-70 parts of an epoxy resin matrix, 5-15 parts of a latent curing system and 2-10 parts of multilayer structure conductive particles. Each conductive particle comprises a conductive core, a coupling transition layer and a reactive elastic layer from inside to outside; and a free radical initiator is loaded in the elastic layer. In the hot pressing process, the elastic layer forms a gradient modulus interface through double-bond crosslinking and interpenetration with the epoxy matrix. According to the invention, the problem of particle slippage in full-automatic binding is solved, the offset is controlled within 0.5, and the resistance rise rate after thermal circulation is lt; and the method has extremely high alignment precision and long-acting reliability.

The present application belongs to the technical field of polymer materials, and particularly relates to a porous conductive epoxy resin composite material and a preparation method and application thereof. The material comprises the following components: 30 parts of epoxy resin E44, 10-50 parts of dimethylbenzene, 0.398-1.587 parts of expanded microspheres, 0-3.035 parts of multi-walled carbon nanotubes and 9.675 parts of polyether amine curing agent T403. In the present study, expanded microspheres (EM) and multi-walled carbon nanotubes (CNT) are simultaneously introduced into the epoxy resin matrix as composite fillers, and a lightweight porous conductive epoxy resin composite material (PCEP) with high conductivity is successfully prepared. Specifically, lightweight EM with a unique closed pore structure is selected as a foaming and weight-reducing filler, which can significantly reduce the overall density of the composite material while maintaining the high strength and high toughness of the epoxy matrix, and the pore size and distribution can be accurately controlled. Then, high-quality dispersed CNT is uniformly introduced into the system, and by constructing a continuous and efficient conductive channel, the conductivity of the composite material is significantly improved.

A radiation shielding material for use in spacecraft comprises boron carbide particles dispersed in an epoxy matrix. In one aspect, the material is formed into modular panels attachable to satellite structures for attenuation of neutron and charged particle radiation. In another aspect, the boron carbide epoxy mixture is applied as a conformal coating to satellite components and cured in place to provide localized shielding. The composite may also be used to pot electronic components within a protective volume. The method of fabrication includes mixing boron carbide with epoxy resin and hardener, stirring until homogeneous, and curing the mixture to form a solid shielding structure. The system provides effective radiation mitigation with reduced weight and form factor compared to traditional metal or high-density polymer shields, and is compatible with aerospace integration and environmental requirements.

The invention discloses an epoxy resin adhesive as well as a preparation method and application thereof, and relates to the technical field of adhesives, the epoxy resin adhesive comprises the following components: epoxy resin, a modified flexibilizer, a curing agent, a filler and a coloring agent; wherein the modified toughening agent is prepared by the following steps: dissolving PEG in deionized water, and adding alpha-CD for reaction; then adding DIBM for reaction, precipitating, washing and drying to obtain an intermediate product; the intermediate product, bio-based polyester polyol and IPDI are subjected to a polymerization reaction, a modified toughening agent with a rotaxane structure and disulfide bonds is obtained, when the modified toughening agent is impacted by external force, an alpha-CD ring can slide along PEG, a pulley effect is generated, local stress is dispersed to a larger range, and the toughness of the adhesive is greatly improved; the rotaxane structure and the epoxy matrix are connected without chemical bonds, and the integrity of a cross-linked network is not damaged by the sliding motion of the rotaxane structure, so that the glass-transition temperature is not reduced while the toughening is realized.

The application discloses a kind of preparation method and application of track traffic photovoltaic support anticorrosive material, belong to anticorrosive material technical field, first preparation amino grafting phenyl borosiloxane and occur ring-opening grafting reaction with epoxy resin, obtain siloxane modified epoxy resin, zinc modified hectorite is prepared simultaneously using metal ion exchange method, by acid catalysis hydrolysis-grafting condensation two-step method constructs fluorosilane functionalized zinc modified hectorite, finally siloxane modified epoxy resin, fluorosilane functionalized zinc modified hectorite, auxiliary agent and curing agent are compounded, obtain anticorrosive material;The application is protected by the synergy of flexible siloxane modified epoxy matrix and fluorosilane functionalized zinc modified hectorite, effectively improve the problem that traditional anticorrosive coating is big, poor and insufficient corrosion resistance of brittle, anti-vibration fatigue, the prepared anticorrosive material has anticorrosive performance, anti-high frequency vibration fatigue performance and good mechanical stability, can adapt to the complex dynamic working condition of track traffic photovoltaic support.

The invention belongs to the technical field of polymer heat-conducting composite materials, and discloses an oriented boron nitride nanosheet heat-conducting composite material, which comprises a three-dimensional skeleton constructed by carrying out freeze drying and orientation on boron nitride nanosheets and cellulose nanofibers, and the epoxy resin is filled in the three-dimensional skeleton through a vacuum impregnation process and is cured. The invention also discloses a preparation method of the oriented boron nitride nanosheet heat-conducting composite material. According to the invention, a multi-scale interconnection structure is formed in a three-dimensional skeleton by utilizing the cellulose nanofibers and the boron nitride nanosheets, and good interface interaction can be generated between hydroxyl and carboxyl functional groups of the cellulose nanofibers and an epoxy matrix, so that thermal resistance at filler-filler and filler-matrix interfaces is effectively weakened; therefore, heat energy can be more efficiently transmitted in the composite material.

The application provides a fiber-modified high-strength and high-toughness corrosion-resistant composite coating with impact damage visualization and a preparation method, relates to the technical field of marine protective coating, and comprises an epoxy resin matrix and modified carbon fibers dispersed in the epoxy resin matrix, wherein metal organic framework particles are in-situ grown on surfaces of the modified carbon fibers, and fluorescent molecules are covalently grafted on surfaces of the metal organic framework particles through amidation reaction.The metal organic framework particles are in-situ grown on the surfaces of the carbon fibers, the interface bonding between the carbon fibers and the epoxy matrix is improved, and the strength and toughness of the coating are improved; meanwhile, the fluorescent molecules are covalently grafted on the surfaces of the metal organic framework particles, the impact damage visualization is realized by using the fluorescence enhancement effect, the compactness of the coating is enhanced, and the corrosion resistance is improved.

This invention discloses a high-efficiency energy-saving transmission device and a nano-sand mill, relating to the field of sand mill technology. It includes: a high-frequency alternating magnetic field generating ring, which is composed of a device shell and a micro-coil array uniformly installed on the inner wall of the device shell; and a multi-level piezoelectric fiber composite material ring disposed inside the high-frequency alternating magnetic field generating ring, which is composed of a flexible epoxy matrix and piezoelectric ceramic fibers embedded in the flexible epoxy matrix arranged in an array along the circumferential and axial directions. The flexible epoxy matrix is ​​connected to the device shell via a connecting plate. This invention can achieve integrated vibration energy recovery and active suppression, reducing vibration damage and achieving the dual goals of energy saving and stable operation. It also features a dual-mode energy storage (electric and mechanical) and dual-path energy recovery energy saving mode, making the energy saving path more efficient.

The invention discloses a microcapsule composite coating capable of resisting chlorine corrosion and preventing marine biofouling and a preparation method, and belongs to the technical field of marine corrosion and protection, the microcapsule composite coating comprises a coating matrix and double-shell structure microcapsules dispersed in the matrix; the double-shell structure microcapsule comprises: an active core material; the inner shell is an organic layer and is used for packaging the active core material; the outer shell coats the outer wall of the inner shell and is formed by compounding an epoxy matrix and MgAl-LDH nanosheets dispersed in the epoxy matrix; the active core material comprises capsaicin. According to the microcapsule composite coating disclosed by the embodiment of the invention, through a double-shell microcapsule structure with an MgAl-LDH composite shell / capsaicin inner core, when the local chloride ion concentration of the composite shell is increased or the composite shell is mechanically damaged, the structure or permeability of the composite shell is changed, so that directional release of the active core material is triggered; the long-acting chloride ion penetration resistance and the continuous marine organism fouling resistance of the coating are synergistically improved, and the technical problem that corrosion prevention and fouling prevention of a traditional coating are difficult to consider at the same time is solved.

This application relates to the field of structural adhesives, and particularly to an epoxy structural adhesive for automotive metal bonding and its preparation method. The epoxy structural adhesive for automotive metal bonding, by weight, comprises the following raw materials: 30-50 parts epoxy matrix, 20-35 parts toughening agent, 3-6 parts curing agent, 2-5 parts accelerator, 1-2 parts silane coupling agent, 0.2-0.3 parts defoamer, 0.8-1.5 parts leveling agent, 0.2-0.3 parts thickener, 3-8 parts composite functional agent, and 10-25 parts solid filler. This application provides a one-component epoxy structural adhesive that can be stored stably at room temperature for a long period, can be rapidly cured in standard automotive drying processes, further reduces the internal performance contradictions existing in the prior art, and maintains excellent overall application performance.

This invention relates to a rapid-curing epoxy floor coating and its preparation method, belonging to the field of coating technology. Through the synergistic effect of hydrophobic modification of siloxanes and shielding by three-dimensional network blended fillers, a comprehensive anti-corrosion and water-resistant system from the surface to the interior is constructed. This solves the common industry problems of high water absorption, easy water vapor penetration, easy whitening and blistering under long-term high humidity, and interlayer delamination in traditional water-based epoxy floor coatings. In the preparation process of the modified epoxy resin, long-chain hydrophobic flexible segments of polypropylene glycol are introduced, and hydrophobic segments are also introduced through esterification grafting to achieve physical hydrophobicity. Then, hyperbranched macromolecules are synthesized in situ, and flexible acidified polyamide is covalently bonded to rigid lanthanum trioxide, constructing a continuous three-dimensional cross-linked network inside the coating. This fills the micropores of the epoxy matrix, extends the penetration path of corrosive media, and improves the anti-corrosion performance of the epoxy floor coating in harsh corrosive environments.

The invention belongs to the technical field of high polymer materials, and particularly relates to a porous conductive epoxy resin composite material and a preparation method and application thereof. The material comprises the following components in parts by weight: 30 parts of epoxy resin E44, 10 to 50 parts of xylene, 0.398 to 1.587 parts of expanded microspheres, 0 to 3.035 parts of multi-walled carbon nanotubes and 9.675 parts of a polyether amine curing agent T403. According to the research, expanded microspheres (EM) and multi-walled carbon nanotubes (CNT) are synchronously introduced into an epoxy resin matrix to serve as composite filler, and the lightweight porous conductive epoxy resin composite material (PCEP) with high conductivity is successfully prepared. Specifically, light EM with a unique closed-cell structure is selected as a foaming and weight-reducing filler, the overall density of the composite material can be remarkably reduced while high strength and high toughness of an epoxy matrix are maintained, and the size and distribution of the pore diameter can be accurately controlled; and then high-quality dispersed CNT is uniformly introduced into the system, and the conductivity of the composite material is remarkably improved by constructing a continuous and efficient conductive channel.

This disclosure relates to an ultra-tough, high-strength... T g Furthermore, this study explores controllable degradable thermosetting epoxy resins, their preparation methods, and applications, aiming to address the challenges of achieving both high rigidity and high toughness in traditional epoxy resins, as well as their non-degradability after molding. Specifically, it employs unsaturated hydrocarbon-terminated polysilsesquioxane JB-POS to modify the epoxy resin. Through segmented crosslinking and kinetic control, JB-POS undergoes in-situ self-assembly within the epoxy matrix to generate a uniform nano-core-shell structure. This structure forms the core of the material, achieving high rigidity, high toughness, and high... T g The material exhibits a synergistic effect between performance and structural stability. Furthermore, the dynamic ester and silicon-oxygen bonds within it endow it with on-demand and controllable degradation properties, achieving a synergistic balance between high toughness, high glass transition temperature, and controllable degradation performance. In addition, the preparation process disclosed herein is simple and can meet the needs of high-end fields such as electronics and aerospace, demonstrating promising prospects for industrial application.

The application provides a cellulose nanocrystal solvent-free fluid, a preparation method thereof and application of the cellulose nanocrystal solvent-free fluid in adhesives. The cellulose nanocrystal solvent-free fluid has a core-crown layer structure, cellulose nanocrystals are used as the core, and flexible long-chain oligomers are grafted on the surface as the crown layer, and the cellulose nanocrystals are spherical, rod-shaped or needle-shaped. The cellulose nanocrystal solvent-free fluid prepared by the application realizes the conversion of nanocrystals from a solid phase to a liquid phase at room temperature, and a novel bio-based nanofunctional material with excellent dispersion stability and room-temperature fluidity is obtained. Excellent fluidity makes the material easy to be uniformly dispersed in an epoxy resin matrix, and the rigid core and the flexible crown layer make the material have both rigidity and flexibility, so that the epoxy resin can be reinforced and toughened as a single modifier. Meanwhile, active amine groups in the oligomer crown layer and epoxy groups in the matrix are crosslinked to improve the interfacial interaction between the spherical cellulose nanocrystals and the epoxy matrix, so that the bonding performance of the epoxy glue is effectively improved.

The invention discloses a damp-heat-resistant epoxy molding compound and a preparation method and high-reliability packaging application thereof, and belongs to the technical field of electronic packaging materials. The plastic packaging material comprises hydrolysis-resistant epoxy resin, a composite curing system containing amino-terminated polybenzimidazole, an inorganic filler containing organic montmorillonite and a hyperbranched polysiloxane interface modifier, wherein the amino-terminated polybenzimidazole and an epoxy matrix form a three-dimensional network with high thermal stability and high hydrolysis resistance; organized montmorillonite and hydrophobic silicon dioxide cooperate to construct a compact and hydrophobic labyrinth type barrier structure, and water vapor permeation is delayed; the hyperbranched polysiloxane strongly bridges and hydrophobizes the interface of the organic resin and the inorganic filler, so that the interface bonding strength and the water erosion resistance are improved. The plastic package material has the advantages of high glass transition temperature, extremely low saturated water absorption rate, excellent electrical insulating property, extremely high mechanical and interface performance retention rate after high-pressure cooking aging and the like, and is suitable for chip packaging in the fields of automotive electronics, industrial control and the like which require extremely high reliability.

The application provides a preparation and application of a reactive core-shell nano-toughening agent for epoxy resin. The reactive core-shell nano-toughening agent has a three-layer core-shell structure, the inner core is introduced by rubber (nitrile-butadiene rubber, styrene-butadiene rubber, polybutadiene) emulsion containing butadiene segments, the outer shell is a crosslinked copolymer obtained by copolymerization of a vinyl monomer, a reactive monomer and a crosslinking agent, and an interface transition layer with controllable thickness exists between the core-shell interface. The provided reactive core-shell nano-toughening agent forms a uniform segment physical entanglement transition layer through a pre-dispersion process, the thickness of the transition layer is controlled by the polarity of the monomer and the pre-dispersion time, the core-shell interface is combined through intermolecular interaction, the stress transmission efficiency of the interface is enhanced, and the toughening effect on the epoxy resin is improved. When the provided reactive core-shell nano-toughening agent is applied to the toughening of the epoxy resin, the reactive functional groups provided by the reactive monomer in the shell structure can react with the epoxy groups or curing agents in the epoxy resin matrix to form a strong covalent bond interface, thereby improving the stability and compatibility of the toughening agent in the epoxy resin matrix. By improving the interaction between the interface of the core-shell toughening agent itself and the interface of the epoxy matrix, the technical problems of poor compatibility of the existing core-shell toughening agent with the epoxy resin, low toughening efficiency and deterioration of the mechanical properties of the matrix after toughening can be effectively solved, and the application range of the epoxy resin in the high-end engineering field can be expanded.

The invention relates to the field of structural adhesives, in particular to an epoxy structural adhesive for automobile metal bonding and a preparation method of the epoxy structural adhesive. The epoxy structural adhesive for automobile metal bonding is prepared from the following raw materials in parts by mass: 30 to 50 parts of epoxy matrix, 20 to 35 parts of toughening agent, 3 to 6 parts of curing agent, 2 to 5 parts of accelerant, 1 to 2 parts of silane coupling agent, 0.2 to 0.3 part of defoaming agent, 0.8 to 1.5 parts of flatting agent, 0.2 to 0.3 part of thickening agent, 3 to 8 parts of composite functional agent and 10 to 25 parts of solid filler. The single-component epoxy structural adhesive provided by the invention can be stably stored at room temperature for a long time, can be quickly cured in a standard automobile drying process, further reduces internal performance contradictions in the prior art, and keeps excellent comprehensive application performance.

The present application relates to civil engineering repair material and intelligent function composite material cross field, disclose a kind of directional penetration crack repair material based on epoxy resin and magnetic particle and its preparation method, application, repair material includes epoxy matrix A, curing agent B, magnetic nanoparticle of surface coating SiO2, functional adjuvant, epoxy matrix A includes epoxy resin, dilution reaction monomer and silane coupling agent, the mass ratio of epoxy matrix A and curing agent B is 1.5~3:1;The mass ratio of epoxy matrix A and curing agent B, magnetic nanoparticle of surface coating SiO2, functional adjuvant is 100:0.5~5:0.5~5.The present application can realize the directional migration and controllable injection of repair slurry in complex crack by introducing magnetic nanoparticle of surface coating SiO2 in system and combining external magnetic field, break through the problem of traditional repair material gravity flow limitation, especially suitable for horizontal, anti-gravity and high-efficiency repair of deep crack.

A method for manufacturing high-performance injection molds using a composite epoxy-metal matrix enhanced with tailored additives. The process employs centrifugal force during curing to create controlled material gradients, concentrating metal and ceramic particles near the mold surface to improve thermal conductivity, hardness, and structural strength.

The invention relates to the technical field of high polymer material modification, in particular to flame-retardant epoxy resin based on POSS-based hybrid macromolecules and a preparation method of the flame-retardant epoxy resin. The POSS-based hybrid polymer with the same substitution position and different substituent groups and the same substituent group and different substitution positions is synthesized and is melt-blended and dispersed in an epoxy matrix, and under the addition amount of the POSS-based hybrid polymer, the limit oxygen index and the carbon yield of the epoxy resin are improved, the peak heat release rate is reduced, and the tensile strength reduction amplitude is reduced, so that the service life of the POSS-based hybrid polymer is prolonged, and the service life of the POSS-based hybrid polymer is prolonged. The system is superior to a traditional high-filling system. The flame-retardant mechanism is that POSS silicon-oxygen skeleton physical barrier and functional side groups cooperate with each other, and a compact carbon layer is formed to inhibit thermal decomposition by combining the dispersibility regulated and controlled by a sequence structure. The preparation process is good in compatibility, can be produced by curing at 100 DEG C for 3 hours, is halogen-free and environment-friendly, meets the RoHS of European Union, can provide an epoxy composite material with high flame retardance, excellent mechanics and environment friendliness for electronic packaging and aerospace, and promotes the application of the material in the field of high-end flame retardance.

The invention discloses a furfuryl alcohol derived DOPO monomeric compound as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. According to the invention, furfuryl alcohol and DOPO are used as raw materials to prepare the furfuryl alcohol-derived DOPO monomeric compound, and then the furfuryl alcohol-derived DOPO-based copolymer microspheres are prepared by polymerization of the furfuryl alcohol-derived DOPO monomeric compound, and the prepared furfuryl alcohol-derived DOPO-based copolymer microspheres have the following advantages: on one hand, a DOPO structure inhibits a combustion chain reaction through a free radical quenching effect; on the other hand, the furfuryl alcohol unit promotes carbonization in the combustion process, a compact physical barrier is formed, and synergistic flame retardance of a gas phase and a condensed phase is achieved; meanwhile, the acid anhydride group on the surface of the copolymer microsphere improves the interface bonding force with the epoxy matrix, so that the dispersity of the copolymer microsphere in the resin can be improved, and the mechanical property of the resin can be enhanced.