76 results about "Conductive composites" patented technology

This application relates to the field of composite materials and discloses a carbon fiber thermally conductive composite material and its preparation method. The composite material includes a thermally conductive layer comprising a first polymer matrix with a longitudinally arranged carbon fiber array along its thickness direction and filling gaps, and an adhesive interface layer disposed on the surface of the thermally conductive layer for bonding external devices. The adhesive interface layer includes a second polymer matrix and sheet-like thermally conductive fillers. Along the direction from near to far from the thermally conductive layer, the angle between the sheet-like thermally conductive filler and the surface of the thermally conductive layer decreases gradually, as does the crosslinking density of the second polymer matrix. By forming a dual-gradient structure of filler angle gradient and matrix crosslinking density gradient in the adhesive interface layer, a directional thermally conductive network is constructed, achieving efficient heat transfer between the external device and the carbon fiber array. Simultaneously, the inner rigid region resists puncture impacts from the carbon fiber ends, while the outer flexible region provides high surface adhesion for bonding the device, enhancing interface reliability.

A system for manufacturing an ultra-conductive winding for an electric motor of a vehicle comprising a substrate extending along a longitudinal axis, an ultra-conductive composite (UCC) foil material having a thickness of 5-30 micrometers and overlapping a portion of the substrate, a substrate support selectively engageable with a portion of the substrate or the UCC material, and a finishing mechanism including a joining mechanism and a cutting mechanism configured to move along or parallel to the longitudinal axis.

This invention provides a self-driven monitoring-type uranium adsorption and recovery system, belonging to the field of radioactive wastewater treatment and resource recovery technology. The system uses a proton exchange membrane (MFC) as its basic architecture, separating the anode and cathode chambers. Its core innovation lies in the biomimetic anode in the anode chamber, a three-dimensional porous conductive composite material formed by the self-assembly and freeze-drying of graphene oxide and uranium-reducing microorganisms, possessing both high-efficiency adsorption, biocatalysis, and rapid electron transfer functions. An external circuit monitoring system collects loop current / voltage signals in real time, using current decay as an early warning indicator of adsorption saturation. The uranium recovery unit removes UO2 particles from the biomimetic anode using physical or chemical methods, achieving resource recovery, and the anode is regenerable and reusable. This system integrates adsorption, in-situ reduction, self-driven monitoring, and resource recovery, solving the problems of difficult adsorbent regeneration, lagging monitoring, reliance on external energy, and complex recovery processes in existing technologies.

This invention discloses a protective garment for epicondylitis of the humerus based on an antibacterial and thermally conductive composite material, belonging to the field of medical protective gear technology. It includes a forearm support and an upper arm support, which are rotatably connected by an adjusting mechanism. The upper arm and forearm sleeves are 3D printed using an antibacterial and thermally conductive composite material, which comprises a polylactic acid matrix, a graphene oxide-silver nanoparticle-carbon nanotube ternary composite filler, and phase change microcapsules, with a thermal conductivity of 1.5-4.0 W·m. ‑1 ·K ‑1 With an antibacterial rate of ≥95%, it solves the problems of poor thermal conductivity, lack of antibacterial properties, and uneven heat therapy in existing protective gear.

This invention discloses a thermally conductive composite material, a liquid-cooled module, and an electronic device, relating to the field of heat dissipation technology. The disclosed thermally conductive composite material, applied to a liquid-cooled module, comprises a thermally conductive core layer and thermally conductive outer layers located on both sides of the core layer. The amount of thermally conductive filler added to the core layer is greater than that added to the outer layers. By constructing a gradient structure of a highly filled thermally conductive core layer and a less filled thermally conductive outer layer, the thermally conductive composite material of this invention achieves a synergistic optimization of thermal conductivity and mechanical properties in liquid-cooled module applications.

The application relates to the technical field of liquid flow batteries, and discloses a high-stability flow channel plate, a preparation method thereof and a liquid flow battery, which comprises the following steps: processing and shaping a conductive plate material, and performing plasma pretreatment to introduce active groups on the surface of the conductive plate material, so as to obtain a pre-oxidized flow channel plate; preparing film-forming slurry, wherein the film-forming slurry comprises a solvent, a dispersing agent, a perfluoroalkyl phosphonic acid and a conductive agent; soaking the pre-oxidized flow channel plate in the film-forming slurry, and performing a self-assembly reaction under light-proof conditions, so that the perfluoroalkyl phosphonic acid is chemically bonded with the active groups on the surface of the pre-oxidized flow channel plate through phosphonic acid groups, and the conductive agent is distributed in a hydrophobic film layer formed by the perfluoroalkyl phosphonic acid, so as to construct a hydrophobic conductive composite film; and cleaning and drying the flow channel plate after the reaction, so as to obtain the high-stability flow channel plate. The application has the advantages of high conductivity, hydrolysis resistance, acid and alkali resistance, high-temperature resistance, blistering resistance and low cost.

The application belongs to the technical field of nylon 66 composite materials, and discloses a heat-conducting composite filler, a preparation method thereof and application of the heat-conducting composite filler in nylon 66. The heat-conducting composite filler is composed of boron nitride (BN@PDA) modified by dopamine and magnesium oxide (MgO-KH560) modified by a silane coupling agent, and the mass ratio is 1-3:1. Through two-step surface modification and solution chemical bonding, the close combination between components is realized, and the problems of uneven dispersion of traditional single heat-conducting filler, poor compatibility with the nylon 66 matrix and weak heat-conducting synergistic effect are effectively solved. When the heat-conducting composite filler is applied to nylon 66 composite materials at an addition amount of 10-30wt%, the thermal conductivity of the nylon 66 can be improved to more than 0.8 W / (m·K), the tensile strength is improved by 17%, and the heat-conducting composite filler has excellent processing performance, and is suitable for the fields of electronic equipment heat dissipation components, LED packaging materials, automobile heat management components and other fields with strict requirements on the thermal conductivity of materials.

This invention belongs to the field of thermal conductive materials technology, specifically relating to a thermally conductive composite material, its preparation method, and its application. The thermally conductive composite material provided by this invention includes an organosilicon thermally conductive sheet and an alloy layer stacked sequentially. An alloy with a specific melting point is loaded into the thermally conductive sheet as the bottom layer. In actual use, the alloy layer, serving as the bottom layer, is in close contact with the heat-generating device. When the device heats up, causing the system temperature to rise and reach the alloy's melting point, the alloy melts from a solid to a liquid, rapidly filling the tiny gaps between the thermally conductive pad and the device. This effectively reduces interfacial thermal resistance, improves the heat flux density at the contact surface between the thermally conductive pad and the heat-generating device, and promotes rapid heat transfer. Simultaneously, it significantly improves the thermal conductivity, meeting the high-efficiency heat dissipation requirements of high-performance electronic equipment under extreme operating conditions, effectively ensuring the long-term stable operation of the equipment. This invention achieves a leap in the overall performance of thermally conductive pads, not only exhibiting excellent thermal conductivity but also high reliability and a wide range of applications.

The application relates to the technical field of communication cables, and particularly discloses a railway digital signal cable with a self-monitoring function, which comprises a cable core, a composite shielding layer and a self-monitoring layer arranged in sequence from inside to outside; the composite shielding layer is wrapped outside the cable core and comprises a first shielding layer, a second shielding layer and a third shielding layer arranged in sequence from inside to outside; the first shielding layer is a metal plastic composite tape wrapping layer and is used for reflecting low-frequency electromagnetic interference; the second shielding layer is a metal foil layer with a microporous structure; the third shielding layer is a semi-conductive polymer layer or a semi-conductive composite material layer; the self-monitoring layer comprises at least two sensing monitoring lines arranged outside the third shielding layer along the cable axial direction, and the sensing monitoring lines and the third shielding layer form a distributed parameter sensor. Therefore, the railway digital signal cable has high shielding efficiency, environmental corrosion resistance, real-time self-monitoring capability and excellent mechanical properties.

This invention discloses a ZIF-derived cobalt-based microwave absorbing and thermally conductive composite material and its preparation method, belonging to the field of microwave absorbing and thermally conductive composite material preparation. The invention first synthesizes a B / P in-situ doped ZIF-7 precursor at room temperature, then encapsulates it with tannic acid, and then reacts it in a methanol solution of cobalt acetate tetrahydrate to obtain a ZIF precursor. The obtained ZIF precursor is then calcined at high temperature to obtain a ZIF derivative with a cobalt single atom, cobalt nanoparticles, and a B / P-N co-doped porous carbon structure. This derivative is uniformly dispersed in an aqueous polyurethane matrix and polymerized to obtain a flexible microwave absorbing and thermally conductive composite material. The material obtained by this invention possesses both efficient electromagnetic wave absorption and thermal conductivity, and can be used to prepare integrated electromagnetic compatibility and thermal management structures for integrated circuit chips, thus showing good application prospects and significant economic benefits.

A metal magnetic flexible composite inductor conductor and a preparation method thereof; the preparation method of the metal magnetic flexible composite inductor conductor comprises the following steps: S1: taking metal and magnetic material; the magnetic induction intensity of the magnetic material is greater than or equal to 1.6 T; S2: continuously attaching the metal to the magnetic material to obtain a conductive and magnetically conductive composite conductor; S3: cutting the conductive and magnetically conductive composite conductor by using a femtosecond laser processing technology to obtain a spiral flexible composite inductor conductor. The flexible composite inductor conductor prepared by the scheme can obtain a larger self-inductance value under the same size, can effectively suppress leakage magnetic flux, reduce leakage magnetic coupling to the outside world and electromagnetic interference, and can realize a more compact spiral inductor layout by reducing the number of turns or reducing the coil geometric size, thereby solving the problem that high inductance density and low power consumption cannot be simultaneously achieved in the traditional inductor conductor.

This invention discloses a CF-Si3N4@CNTs / EP thermally conductive composite material and its preparation method. Using cotton fibers as a skeleton, silicon nitride and cobalt nitrate hexahydrate are loaded onto the surface of the cotton fibers through ultrasonic impregnation. Under high-temperature conditions, carbon-containing gas generated from urea pyrolysis is used to reduce cobalt ions to metallic cobalt, which then serves as a catalytic site for the high-temperature pyrolysis growth of carbon nanotubes. The cotton fibers are then carbonized to obtain the CF-Si3N4@CNTs composite skeleton. This composite skeleton is then vacuum impregnated and cured with epoxy resin to obtain the CF-Si3N4@CNTs / EP thermally conductive composite material. This invention effectively reduces the interfacial contact thermal resistance between the filler, fiber skeleton, and matrix by constructing a multi-level continuous thermally conductive network, significantly improving the thermal conductivity of the composite material. The process is simple, environmentally friendly, and has good application prospects.

This invention relates to the field of epoxy resin composite materials technology, and in particular to an epoxy resin composite material, its preparation method, and its application. By weight, it comprises: 95-105 parts of bisphenol A type epoxy resin, 5-8 parts of a biomimetic toughening agent, 18-22 parts of a thermally conductive composite filler, 0.5-1 part of graphene, 2-3 parts of nano-silica, 8-12 parts of reinforcing fibers, 1-1.5 parts of a silane coupling agent, and 25-30 parts of an amine curing agent. This invention achieves a synergistic improvement in thermal conductivity, mechanical properties, toughness, and heat resistance, solving the technical problems of poor thermal conductivity, low toughness, and difficulty in balancing strength and toughness in existing epoxy resins.

This invention belongs to the field of thermally conductive composite material preparation technology, specifically relating to high thermal conductivity graphene / copper composite materials, preparation methods, and derived composite materials. The preparation method includes: placing graphene oxide in pure water, subjecting it to ultrasonic treatment and mechanical stirring to obtain a uniformly dispersed graphene oxide dispersion; adding a copper salt solution to the graphene oxide dispersion in an inert gas atmosphere to obtain a mixed system; adding a reducing agent to the mixed system to reduce copper ions to copper atoms, causing copper atoms to grow orderly along the two-dimensional plane of graphene oxide, forming sheet-like copper-coated graphene oxide powder; pressing the copper-coated graphene oxide powder into a green body, placing the green body in a hydrogen atmosphere, sintering, and cooling to obtain a sintered body; and performing interface strengthening treatment on the sintered body to prepare a high thermal conductivity graphene / copper composite material. In this composite material, copper atoms are directionally and uniformly attached to the surface of graphene oxide, forming a stable composite structure.

To provide: a method for producing a conductive composite that is suitable for producing a conductive polymer dispersion that has a reduced viscosity increase during storage and gives a coating film having good conductivity after cure; and a method for producing a capacitor.SOLUTION: A method for producing a conductive composite comprises: a step A of adding a water-soluble azo polymerization initiator to a first reaction mixture comprising a polymerizable anionic monomer and water to obtain a second reaction mixture comprising a polyanion obtained by polymerization of the polymerizable anionic monomer; and a step B of adding a polymerizable monomer, which forms a π-conjugated conductive polymer, and an arbitrary radical polymerization initiator to the second reaction mixture to obtain a third reaction mixture comprising a conductive composite in which the π-conjugated conductive polymer and the polyanion are complexed. When the second reaction mixture supplied to the step B is analyzed by GPC, a ratio, Sm / Sp, of a peak area Sp of the polyanion and a peak area Sm of the polymerizable anionic monomer is 3.0% or less.SELECTED DRAWING: Figure 1

The present application relates to a kind of epoxy resin heat conducting composite material and its preparation method, belong to heat conducting composite material field.The modified boron nitride, polyamide acid and amino-terminated amide acid are built three-dimensional skeleton by ice template method in the present application, after skeleton imidization, epoxy resin is perfused, and the epoxy resin heat conducting composite material is obtained after curing.The skeleton provides a way for phonon transport, reduces the interfacial thermal resistance between skeleton and matrix, and achieves the purpose of improving the thermal conductivity of composite material at low filler load.The epoxy resin heat conducting composite material prepared in the present application improves the interfacial thermal resistance between skeleton and matrix by building continuous boron nitride skeleton in polymer at the same time through covalent bond.

This invention relates to a corrosion-resistant, highly dense, and conductive composite layer for soft metal surfaces, its preparation method, high-voltage cables, and applications, belonging to the field of soft metal substrate-based composite technology. Using a soft metal as a substrate, a composite layer is coated onto the surface of the substrate. Starting from the substrate surface, the composite layer consists of a corrosion-resistant transition layer, a conductive layer, and a sealing layer. This invention constructs a multi-layered gradient composite structure of "corrosion-resistant transition layer, conductive layer, and sealing layer," achieving a synergistic improvement in corrosion resistance, high conductivity, high density, and mechanical strength through functional layering design. This overcomes the limitations of a single coating in achieving multiple performance characteristics. The composite layer exhibits a bonding strength of 30-40 MPa with the substrate, a tensile strength at break of 50-100 MPa, a porosity of <1%, a conductivity of over 30 MS / m, and no corrosion products.

The application discloses a heat-conducting composite film constructed by an amide bond and a preparation method thereof, and belongs to the technical field of heat-conducting composite materials. The CNT@BN hybrid heat-conducting filler is prepared by an amidation reaction of aminated boron nitride and carboxylated carbon nanotubes, TEMPO oxidized bacterial cellulose is prepared by a specific process as a three-dimensional flexible skeleton, the hybrid filler is blended with a water dispersion of the TEMPO oxidized bacterial cellulose, vacuum filtration, film forming, drying and hot pressing are carried out, and a high-heat-conducting and high-flexible composite film is obtained. With the three-dimensional nanofiber network and strong interface effect of the TEMPO oxidized bacterial cellulose, the heat resistance of the filler-matrix interface is significantly reduced, a continuous and efficient heat-conducting path can be constructed under a low filler addition amount, the obtained composite film has excellent heat-conducting property, flexibility and mechanical property, the preparation process is simple, and the composite film can be produced on a large scale, and is suitable for the fields of flexible electronics and heat management.

To provide a conductive polymer dispersion with improved storage stability. [Solution] A conductive polymer dispersion comprising a conductive composite containing a π-conjugated conductive polymer and a polyanion, and a dispersion medium, wherein the Fe content relative to the total mass of the conductive polymer dispersion is 0.08 ppm or less. The ratio expressed as Fe content / S content in the conductive polymer dispersion is 1.5 × 10 -4 The following is preferable: It is preferable that the anionic group that does not participate in doping the polyanion is modified by reaction with at least one selected from epoxy compounds, amine compounds, and quaternary ammonium compounds.

The utility model discloses a kind of electric core, electric core group, battery pack and electric equipment, electric core includes: electric core body and tab. Tab is located at the end of electric core body, tab includes welding area and non-welding area, at least part on welding area is equipped with protective layer, at least part on non-welding area is equipped with electrically-conductive and thermally-conductive composite layer. By setting protective layer in the welding area of tab, and setting electrically-conductive and thermally-conductive composite layer in the non-welding area of tab, protective layer and electrically-conductive and thermally-conductive composite layer can increase the ability of electric conduction and heat conduction of tab, reduce the relative current density at tab, reduce the heat production of tab, thereby reduce the temperature difference between tab and electric core body, effectively prolong the service life of electric core, reduce the security risk of temperature being too high at electric core tab to some extent, improve the safety and reliability of electric core.

This application provides a highly conductive and mechanically stable aramid / conductive composite fiber and its preparation method, belonging to the field of composite fibers. The method involves first wet spinning an aramid spinning solution to obtain undried gel-state aramid fibers, then immersing these fibers in a PEDOT:PSS solution. This allows PEDOT:PSS to penetrate the fiber interior and form strong interactions such as hydrogen bonds and π-π bonds with the aramid fibers. Finally, the fibers are dried to obtain the composite fiber. This application utilizes the loose, porous structure of the gel fibers to allow PEDOT:PSS to fully penetrate the fiber interior, rather than merely remaining on the fiber surface. This composite method retains the strong skeleton of the aramid while imparting good conductivity to the composite fiber. After sulfuric acid treatment, the conductivity of the composite fiber is significantly improved without damage to its mechanical properties. The resulting composite fiber maintains stable conductivity even after repeated bending and stretching, showing broad application prospects in flexible electronics, smart fabrics, wearable devices, electromagnetic shielding, and energy storage devices.

The application provides a conductive and heat-conductive composite ink as well as a preparation method and application thereof. The conductive and heat-conductive composite ink comprises cluster-state material liquid drops in a pomegranate-like structure; the cluster-state material in the pomegranate-like structure comprises graphene, liquid metal and one-dimensional conductive and heat-conductive material; the graphene is assembled on the surface of the liquid metal to form hybrid microspheres, and the one-dimensional conductive and heat-conductive material is bridged between the hybrid microspheres to form the cluster-state material in the pomegranate-like structure. The composite ink provided by the application can obtain a dense, high-conductive and bidirectional heat-conductive film, which is used for a thermal interface material and simultaneously has electromagnetic shielding performance in a GHz frequency band and high interface thermal conductivity, so that key parts in an electronic device are protected from electromagnetic wave interference and high temperature, and high-speed operation of the electronic device is ensured.

The application discloses a long-cycle conductive composite material and a preparation method thereof. The conductive composite material is composed of carbon materials, a binder and a dispersing agent. The carbon materials are a combination of one-dimensional and three-dimensional carbon materials. The binder is selected from specific acrylate or butadiene polymers. The dispersing agent is a combination of sulfonate and PAA or one of them. The components are matched according to specific mass fractions. The carbon materials, the binder and the dispersing agent all meet strict performance and structure parameter requirements. The application also provides a preparation method suitable for material structure design. The target product is prepared through raw material pretreatment, step-by-step dispersion, magnetic field orientation forming and gradient drying and curing. The conductive composite material has high electronic conductivity and ionic conductivity, forms an orientation structure, effectively improves the electronic and ionic transmission efficiency, realizes high coating rate of silicon materials, significantly improves the conductive stability in the electrode cycle process, relieves the negative electrode expansion problem, reduces the interface impedance, and greatly prolongs the cycle life of the lithium ion battery.

To improve storage stability of a conductive composite body dispersion using methyl ethyl ketone as a dispersion medium.SOLUTION: A conductive composite body includes π-conjugated conductive polymer and polyanion. A conductive composite body dispersion includes a dispersion medium. The dispersion medium includes methyl ethyl ketone and a glycol ether-based organic solvent whose boiling point is 100°C or above. A content of the methyl ethyl ketone is 50 mass% or more relative to a total mass of the dispersion medium. An anionic group not participating in dope of the polyanion has a bond with a quaternary ammonium group.SELECTED DRAWING: None

The application relates to the technical field of electromagnetic shielding materials, in particular to a shielding cover based on a silicon rubber conductive glue and a preparation method thereof. An aluminum-magnesium alloy raw material is pressure-cast to form a shielding shell; a composite magnetic adhesive, a silver-carrying copper conductive composite adhesive and a silver-carrying conductive composite adhesive are sequentially spot-coated at fixed positions of the shielding cover, vulcanization and packaging are carried out, and a finished product is obtained. The finished product prepared by the application has excellent electromagnetic shielding performance, so that the application has a wide application prospect in the technical field of electromagnetic shielding materials.

The present application relates to the technical field of heat conduction, in particular to a high-thermal-conductivity composite heat-conduction sheet with multi-stage diamondized filler and a preparation method thereof, and provides a preparation method of the high-thermal-conductivity composite heat-conduction sheet with multi-stage diamondized filler, which comprises the following steps: mixing a heat-conduction filler and a polymer matrix to obtain mixed slurry; wherein the heat-conduction filler comprises micron-level diamond microspheres, boron nitride microsheets, nano-diamond particles and heat-conduction spheres with a particle size smaller than the diamond microspheres; placing a reinforcing fiber mesh in a mold, injecting the mixed slurry into the mold, and performing a pressurized curing treatment on the mold; and obtaining a composite heat-conduction sheet after curing. The present application provides a high-thermal-conductivity composite heat-conduction sheet with multi-stage diamondized filler and a preparation method thereof, and can provide a composite heat-conduction sheet with excellent heat conduction performance.

The invention belongs to the technical field of conductive films, and relates to a fluoroplastic conductive composite film and a preparation method and application thereof. The film comprises an array carbon nanotube film-like material and a fluoroplastic film which are compounded with each other, the array carbon nanotube film-like material comprises array carbon nanotubes and a low surface energy polymer; and the content of the array carbon nanotubes in the thin film is 0.01-5% by weight. The fluoroplastic composite film disclosed by the invention can obtain good conductivity under the condition that the addition amount of the carbon nanotubes is extremely small, and has good tensile strength at the same time.