54 results about "Epoxy matrix" patented technology

The invention provides an epoxy resin-based multi-level grain composition carbon fiber reinforced low-resistance sealing paste and a preparation method thereof, and belongs to the technical field of sealing paste preparation. The method comprises the following steps: firstly, preparing a multi-scale hybrid additive integrating two-dimensional graphene, a one-dimensional conductive chain and zero-dimensional metal / carbon through multi-step in-situ synthesis and high-temperature pyrolysis, and taking the multi-scale hybrid additive as a key bridge of a microcosmic conductive network; meanwhile, a silane coupling agent is adopted to carry out surface modification on a macroscopic carbon fiber skeleton, and a molecular bridge is constructed to ensure strong chemical bonding between the molecular bridge and an epoxy matrix; the functional component and the economical filler are uniformly dispersed in the epoxy resin under high shear force to form a physical conductive network precursor, and the network structure is locked in a firm three-dimensional polymer matrix through thermal-initiated cross-linking polymerization reaction during use, so that the physical conductive network is formed. Therefore, the high-performance composite material with low resistivity and excellent comprehensive performance is obtained.

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.

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 application belongs to the technical field of epoxy resin adhesives, and more particularly relates to a high-tensile single-component bio-based epoxy structural adhesive as well as a preparation method and application thereof. The application realizes the synergistic optimization of rigidity, toughness and interfacial bonding force from the molecular structure level by constructing a multi-element synergistic epoxy matrix network with bisphenol A type liquid epoxy resin as a rigid main matrix, rubber modified epoxy resin as a toughness enhancing phase, polyurethane modified epoxy resin as a flexible buffer phase and cashew phenol based epoxy blend as a bio-based enhancing phase. Meanwhile, by adjusting the proportions of latent curing systems, water removal agents and thixotropic systems, the synergistic effect among the components is fully utilized, and the synchronous improvement of high tensile strength, high fracture toughness, good storage stability and high efficiency curing at medium temperature is realized, which perfectly meets the high-end application requirements for high performance, environmental protection and automatic construction of structural adhesives in the process of automobile lightweight integration.

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.

The present invention belongs to the field of materials science, and specifically discloses a highly absorbent electromagnetic shielding and thermally conductive epoxy composite material, a preparation method and uses thereof. The preparation method of the composite material is as follows: BN, MWCNT and cellulose are mixed evenly and then form a wavy oriented structure through an ice template, and after vacuum drying, it is carbonized at high temperature. Subsequently, the epoxy resin curing components are stirred evenly and then poured into the ceramic skeleton through vacuum assistance, and the poured skeleton is cured at high temperature to obtain the BN / MWCNT / EP composite material. The material is mainly composed of a ceramic skeleton composed of boron nitride (BN) and multi-walled carbon nanotubes (MWCNT) and an epoxy matrix. Under the extrusion force of ice crystal growth, BN is wound by MWCNT and overlaps with each other to form a thermal conduction path. At the same time, MWCNT forms an electrical conduction path and absorbs electromagnetic waves through multiple reflections to cause dielectric loss. The prepared epoxy resin composite material has high absorbent electromagnetic shielding efficiency and thermal conductivity, and at the same time, its mechanical properties are also greatly improved.

This invention relates to a device and process for preparing self-reinforcing and self-healing shape memory composite materials. It innovatively employs a vacuum-assisted injection method to composite and cure epoxy-based shape memory polymers (SMP) with tensioned NiTi shape memory alloy (SMA) wires. The thermotropic shrinkage properties of the NiTi alloy wires are utilized to improve the stiffness of the epoxy matrix while simultaneously healing internal microcracks. This preparation process and supporting equipment can minimize defects in the preparation and use of composite materials and enable semi-automatic control of the composite material's stiffness.

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.

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 present invention relates to a corrosion-resistant, lightweight radar-absorbing coating, belonging to the technical field of absorbing coating preparation. Specifically, the coating comprises a topcoat component and an innercoat component. The topcoat component includes the following raw materials: a conductive polymer-epoxy matrix A, composite absorbing particles A, a corrosion inhibitor, and a solvent; the innercoat component includes the following raw materials, in parts by weight: a conductive polymer-epoxy matrix B, composite absorbing particles B, and a solvent. The topcoat utilizes a polypyrrole powder / epoxy matrix composite with a ferrite-based absorber and nano-silicon carbide. The high magnetic permeability of the ferrite and the dielectric loss of the SiC combine to block the conductive network and cover high-frequency waves. The innercoat utilizes a polypyrrole fiber / epoxy matrix composite with carbonyl iron powder / SiC, leveraging the high hysteresis loss of the carbonyl iron and the SiC support structure to achieve low-frequency absorption. Through a gradient conductive structure design and multi-component synergistic optimization, the radar-absorbing coating achieves broadband absorption, corrosion resistance, and lightweight properties.

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.

Disclosed in the present invention are a highly thermally-conductive epoxy resin scratch self-repairing material doped with phase-change microspheres and a preparation method therefor. The preparation method comprises using n-octacosane having a phase-change capability as microsphere main bodies; modified oleophilic nano SiC particles are added to the microsphere main bodies so that the microspheres can obtain a non-contact targeted heating function; and modified oleophilic BN particles are added to an epoxy matrix so that the high thermal conductivity of the modified oleophilic BN particles increases the thermal conductivity of a composite material, helping the microspheres absorb heat and undergo a phase change. When damage occurs, phase-change microcapsules in the damaged area are induced, by means of targeted heating, to rapidly melt so as to fill in damaged channels, and are cooled and cured to achieve self-repairing of the material.

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.

A method of extracting a thermoset epoxy material portion from a composite structure comprising a matrix of thermoset epoxy material having a network structure and embedded solid element (s) is described. The method includes providing a swelling fluid and immersing the composite structure with the swelling fluid, including swelling the thermoset epoxy material matrix, the swelling fluid entering the network structure of the thermoset epoxy material matrix for a sufficient time to mechanically disrupt the network structure, and immersing the composite structure with the swelling fluid. To form a large number of thermoset epoxy material fractions that are decoupled from the solid element. At least a portion of the thermoset epoxy material portion is separated from the solid element to obtain a swelling fluid slurry comprising the portion of the thermoset epoxy material portion in a swelling fluid. The swelling fluid comprises at least 1 mol / L formic acid.

Methods and systems for recycling printed circuit boards (PCBs). The printed circuit board is exposed to a swelling agent that swells and decomposes an epoxy matrix of the printed circuit board into particles. The particles of the epoxy resin are then separated from the printed circuit board, leaving their reinforcing fibers and metal-containing components. These remaining components are separated from each other and recovered using suitable processes, respectively. Epoxy particles are also restored and can be reduced to monomers for the synthesis of new epoxy resins. The swelling agent includes formic acid as an active ingredient.

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 invention relates to a hybrid anti-rust pigment based on attapulgite modification and application of the hybrid anti-rust pigment in an anti-corrosion coating. The natural nano material attapulgite has the characteristics of high specific surface area, surface activity, high porosity, good chemical stability and the like. The characteristics endow the attapulgite with the capability and special behaviors of serving as a carrier. According to the invention, attapulgite is taken as a carrier, and an organic acid corrosion inhibitor is successfully loaded on attapulgite after purification with inorganic acid and modification with inorganic salt, so that a novel hybrid anti-rust pigment is obtained. The characteristic that the organic acid corrosion inhibitor can react with Fe < 3 + > to generate a complex is utilized, so that the corrosion inhibition function of the carbon steel is realized. And carrying out vacuum drying on the loaded product to obtain an anti-rust pigment product. The novel hybrid anti-rust pigment has the shielding effect of the attapulgite and the complexing anti-rust effect of the organic acid corrosion inhibitor. The hybrid anti-rust pigment is added into an epoxy matrix according to the proportion of 1 wt.%-10 wt.%, and the corrosion protection effect on carbon steel can be achieved.

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.

The present technology relates to an efficient process of mixing, dispersing and integrating reduced graphene oxide (RGO) or carbon nanomaterials or nanostructured materials to the epoxy matrix of the “fusion-bonded epoxy” (FBE) type. The polymeric material consists of a mixture of the solid epoxy particulate with a curing agent, catalyst, pigments and inorganic additives. It allows to integrate nanometric particulate additives in FBE, using FBE in solid state. Powder FBE+RGO system mixes are produced by means of a planetary ball mill or high energy planetary ball mill with internal addition of balls, with time and rotation control. The mixtures show little or no sign of RGO aggregation after application of the composite as a coating on metals. The mixture of FBE+RGO can be applied to metallic surfaces to protect against abrasive processes and corrosion without compromising the properties presented by FBE applied without nanomaterials. There were increases of up to 11% in abrasion resistance, improvement in the material's resistance to accelerated tests, such as immersion in a hot water bath, and a significant increase in adherence, of approximately 100% after the hot bath immersion test.

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.

The invention relates to a high-transparency and high-stability epoxy packaging material as well as a preparation method and application thereof. The high-transparency and high-stability epoxy packaging material comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 40 to 60 parts of bisphenol A type epoxy resin, 15 to 25 parts of alicyclic epoxy resin, 3 to 8 parts of surface modified zinc sulfide, 0.5 to 2 parts of hydroxylated graphene, 1 to 4 parts of silane double coupling agent and 0.2 to 0.6 part of catalyst A; wherein the catalyst A is 2-ethyl-4-methylimidazole, and the catalyst B is 2-ethyl-4-methylimidazole; the component B is prepared from the following raw materials in parts by weight: 10 to 20 parts of alicyclic anhydride, 5 to 15 parts of polyhydric alcohol and 0.2 to 0.6 part of a catalyst B; wherein the catalyst B is tetrabutylammonium bromide. Compared with the prior art, the modified zinc sulfide and the hydroxylated graphene in the component A form a homogeneous system with the epoxy matrix through the double coupling agent, the 8-14 [mu] m light transmittance reaches 88.5-91%, the haze is smaller than or equal to 5%, the viscosity (25 DEG C) is 3000-4000 cps, the thixotropic effect is avoided, and the adhesive is suitable for high-precision dispensing.

Disclosed are materials, devices, systems, and methods for an intrinsically conductive adhesive (ICA) that can be used to interconnect solar modules. In some aspects, a method can include acquiring a material comprising an insulating epoxy matrix; synthesizing the ICA by replacing the insulating epoxy matrix with a conducting polymer matrix free of electronic filler material; and optimizing at least one functional property of the ICA by modifying one or more formulations of the ICA including incorporating one or more of a crosslinker, polar dopants, adhesion promoters, or carbon nanotubes into the ICA.

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.