287 results about "Graphene membrane" patented technology

The invention provides a high-strength and high-heat-conductivity graphene heat-conducting gasket and a preparation method thereof, and provides a modified graphene film and a solution for arranging a curing layer to solve the technical problem that in the prior art, a graphene heat-conducting gasket is extremely prone to cracking and layering, and consequently the service life and the heat conductivity are affected. The graphene film specifically comprises a plurality of layers of modified graphene films, the adjacent modified graphene films are bonded through adhesive layers to form an integral structure, the integral structure is provided with a curing layer on the outer surface of the modified graphene films in the stacking direction, the modified graphene films are provided with a plurality of through holes in the stacking direction, and the through holes are arranged in an array mode. The strength of the graphene heat-conducting interface material is improved by modifying the graphene film; and the thermal conductivity in the Z-axis direction is greatly improved by carrying out oriented arrangement on the modified graphene film.

The invention relates to the technical field of heat dissipation materials, and discloses a graphite cooling fin of a multi-layer composite structure and a manufacturing process of the graphite cooling fin of the multi-layer composite structure. 15 to 25 parts of artificial graphite powder; 3 to 8 parts of an aniline-p-phenylenediamine copolymer; 2 to 6 parts of antimony oxide nano particles; 2 to 5 parts of urea; 1 to 3 parts of polyvinylpyrrolidone; the preparation method comprises the following steps: carrying out heat treatment on the artificial graphite film, and then carrying out mechanical pulverization; mixing the graphite oxide with an ethanol or water mixed solvent containing ammonia water; mixing the raw materials; performing vacuum defoamation and then coating on a base material; and performing carbonization treatment on the graphene film crude product, and performing lamination calendering treatment to form a final product. According to the technical scheme, the antimony oxide nano particles are adopted to synergistically adjust the heat conductivity, the effect of remarkably improving the transverse heat conductivity of the film body is achieved, the heat conductivity is enhanced, and material embrittlement caused by overfilling is avoided.

The invention provides a heat dissipation composite material and a preparation method and application thereof. The heat dissipation composite material comprises a bonding layer, an insulating breathable layer, a heat conduction layer and a heat conduction diffusion layer which are sequentially arranged from bottom to top. Wherein the bonding layer is obtained by mixing and reacting a polymer matrix material, a composite filler and a molecular bridging agent, the insulating breathable layer is a porous insulating material, the heat conduction layer is a graphene film, and the heat conduction diffusion layer is prepared from porous matrix composite heat conduction nanoparticles. According to the invention, through combination and structural design of each layer of material, a synergistic effect of a multi-layer structure is realized, firm and stable bonding of the heat dissipation composite material and a heating electronic device is realized, the heat dissipation efficiency and insulation air permeability of the heat dissipation composite material are remarkably improved, and the heat dissipation requirement of high-power-density electronic equipment can be met.

The present invention provides a high-thermal-conductivity and high-thickness graphene composite film and a preparation method therefor. The graphene composite film has a thickness of 1-2 mm, a thermal conductivity in the horizontal direction of 1500-1800 W / m•K and a thermal conductivity in the vertical direction of 100-200 W / m•K. The graphene composite film is obtained by mixing, coating, drying and sintering raw materials comprising a graphene oxide slurry, carbon fibers, carbon nanotubes and an adhesive dispersant, wherein on the basis of the mass of the graphene oxide slurry, the mass percentage of the carbon fibers is 4-7%, the mass percentage of the carbon nanotubes is 5-10%, and the mass percentage of the adhesive dispersant is 5-10%. The graphene composite film uses graphene oxide as a base material, and carbon fibers and carbon nanotubes of a certain length and diameter are added thereto to create a thermal conduction channel in the vertical direction. The synergistic combination of the three raw materials solves the current defect of it being difficult to balance the thickness and axial thermal conduction performance of a graphene film.

The invention relates to the technical field of brake discs, in particular to a carbon-ceramic brake disc with a composite functional layer and a preparation method of the carbon-ceramic brake disc. The problems that a brake disc is insufficient in strength and poor in ablation resistance are solved. The preparation method comprises the following steps: carrying out low-temperature plasma treatment and silicon dioxide sol impregnation on carbon fibers, and inserting a graphene oxide film between woven layers, so as to obtain a carbon fiber preform; primary densification is carried out through pretreatment activation, low-temperature permeation and high-temperature permeation, and two graphitization treatments are combined; siliconizing is carried out through low-pressure permeation, high-pressure strengthening and laser cladding, and secondary densification is carried out through precursor impregnation and cracking; the titanium zirconium silicide-nano aluminum oxide composite layer generated through the embedding process forms a compact oxidation film at high temperature, and the silicon carbide nano crystal whiskers are subjected to chemical vapor deposition, so that the strength and ablation resistance of the prepared carbon ceramic brake disc are improved.

The invention discloses a graphene film / copper hot-pressing composite directional high-thermal-conductivity material as well as a preparation method and application of the graphene film / copper hot-pressing composite directional high-thermal-conductivity material. The preparation method comprises the following steps: punching a graphene film to form a plurality of hole structures; blade-coating copper paste on the surface to form a liquid film; the copper paste comprises copper powder, a coupling agent and an organic phase; stacking a plurality of layers; carrying out hot pressing treatment on the circulating laminated structure; and slicing to obtain the graphene film / copper hot-pressing composite oriented high-thermal-conductivity material. When copper powder particles are embedded into the hole structure, the whole hole structure is filled with the copper powder particles, the copper powder particles can transversely enter gaps between graphene sheet layers, a three-dimensional interlocking structure is formed through the sintering effect, resin contained in the copper paste can be subjected to a carbonization reaction in the glue discharging stage, a carbon skeleton is formed, and therefore the three-dimensional interlocking structure is formed. And the infiltration process between the copper powder and the graphene sheet layer is facilitated, and finally the heat conduction performance and the mechanical performance of the graphene film / copper hot-pressing composite oriented high-heat-conduction material are remarkably improved.

The invention relates to a self-adhesion breathable laser-induced graphene film and a preparation method thereof. The self-adhesion breathable laser-induced graphene film is used for electromyographic signal detection. The method comprises the following steps: mixing a PDMS stock solution and a curing agent, coating a PET film with the mixture, covering a PI film, and curing to form the base plate. Then, PI powder and a PDMS solution are mixed, a curing agent and polyethylene glycol are added to adjust the adhesiveness, the mixture is dropped into a base plate after dilution, and vacuum defoaming and spin coating are conducted. The preparation method comprises the following steps: preparing a PEG film, inserting a micro-needle template, curing, pouring an Ecoflex solution, curing again, pulling out the micro-needle template to obtain a PI / PDMS / PEG film with breathability and self-adhesion, performing laser engraving by using a carbon dioxide laser to generate laser-induced graphene, and finally obtaining the self-adhesion breathable laser-induced graphene film. According to the membrane, human body surface electromyogram signals are collected by utilizing the characteristics of high conductivity and low signal-to-noise ratio of laser-induced graphene, the adhesion is adjusted through polyethylene glycol, the air permeability is realized through a microneedle template method, the application scene of a device is expanded, and an electrode patch capable of monitoring for a long time is provided for human body physiological signal detection.

The invention belongs to the technical field of graphene film preparation, and particularly relates to a graphene thick film preparation method, which comprises: mixing a boric acid aqueous solution and a graphene oxide dispersion liquid to obtain a boric acid / graphene oxide mixed dispersion liquid; after the mixed dispersion liquid of boric acid / graphene oxide is coated, a solvent is evaporated, and a boric acid doped graphene oxide film is prepared; and stacking a plurality of layers of boric acid doped graphene oxide films, performing pressurization treatment, and performing annealing treatment in an inert atmosphere to obtain the graphene thick film. The preparation method provided by the invention not only solves the problem of film interface effect of the graphene thick film in the prior art and remarkably improves the conductivity of the graphene thick film, but also realizes effective regulation and control of the thickness of the graphene thick film through a simple stacking mode, and the preparation method is suitable for large-scale production. Powerful support is provided for application of the graphene thick film in the fields of electrochemical energy storage, electromagnetic shielding, heat dissipation and electric conduction.

The utility model discloses a continuous multilayer copper-graphene composite film and a preparation device thereof, and belongs to the field of copper-graphene composite film preparation. According to the device disclosed by the utility model, the copper-graphene composite film layer is prepared on the surface of the copper foil by arranging the copper-graphene composite film layer preparation unit, and a graphene film in the prepared copper-graphene composite film layer can keep integrity; in the whole preparation process, the composite film can be continuously prepared and obtained only by keeping continuous winding and unwinding of the copper carrying roller and the composite material winding roller, a subsequent pressing treatment procedure is not needed, the phenomenon of poor quality caused in the pressing process is avoided, the continuity and stability of the preparation process of the composite film are guaranteed, and the production efficiency is improved. The layered composite film with good combination can be obtained, and the technical problem that an existing device is low in preparation efficiency is solved.

The invention discloses a graphene piezoresistive accelerometer, which relates to the technical field of sensor measurement, and comprises a support frame, a central island, a plurality of metal electrodes, a plurality of groups of connecting beams, a plurality of graphene films and a plurality of mass blocks, each inner side wall of the supporting frame is connected with the outer wall of the center island through a set of connecting beams, each connecting beam comprises a sensitive beam and a plurality of supporting beams, and the mass blocks are installed on the back side of the center island, the back side of each sensitive beam and the back side of each supporting beam. All the metal electrodes and all the graphene films are installed on the front end face of the supporting frame, every two metal electrodes are connected with one graphene film, the first end of the sensitive beam is connected with the supporting frame, the graphene films are arranged corresponding to the first end of the sensitive beam, and the thickness of the first end of the sensitive beam is smaller than that of other positions of the sensitive beam. According to the invention, the sensitivity is good, the influence of the inherent frequency on the sensitivity is small, and a high G value can be realized.

The invention relates to a method for preparing an efficient electromagnetic shielding graphene film by using a rapid Joule heat technology, and belongs to the technical field of functional materials and application thereof. The method comprises the following steps: firstly, preparing a graphene oxide film through vacuum filtration, then carrying out pre-reduction treatment under the protection of argon, heating the film to 700 DEG C, and carrying out heat preservation for 1 hour so as to remove part of oxygen functional groups; and then, soaking the pre-reduced film in a ferric chloride ethanol solution, introducing a Fe3O4 nanoparticle precursor, and carrying out discharge treatment for 0.1 second under the voltage of 100V through a rapid Joule thermal reduction technology to realize rapid reduction of graphene oxide and doping of Fe3O4 nanoparticles. The finally prepared graphene film shows excellent electromagnetic shielding effectiveness in an X wave band (8-12 GHz), the electromagnetic shielding effectiveness reaches 38 dB, and the electromagnetic shielding effectiveness is improved by 2 dB compared with a sample (36 dB) not doped with Fe3O4. The method has the advantages of being easy and convenient to operate, low in energy consumption and high in reduction efficiency, meanwhile, the synergistic effect of conductivity loss, magnetic loss and dielectric loss is achieved through introduction of the Fe3O4 nanoparticles, the electromagnetic shielding performance of the material is remarkably improved, and the method is suitable for the fields of electromagnetic interference protection of electronic equipment and the like.

The invention belongs to the technical field of graphite metal composite heat dissipation devices, and provides a flexible graphene film heat conduction cable and a preparation method thereof.The preparation method comprises the steps that the surface of a graphene film is cleaned and punched, and the graphene film with micron-sized pores in the surface is obtained; sequentially plating a layer of active metal film and a layer of heat-conducting metal film on the surface of the graphene film, and cutting to obtain a graphene film; graphene films are overlaid layer by layer to obtain a laminated material, and the two ends of the laminated material are clamped to a hot-pressing mold to be subjected to hot-pressing welding treatment, so that a locally connected flexible heat conduction section is obtained; and the flexible heat conduction section and the heat conduction metal shell are assembled, a soldering lug is placed for brazing and finish machining, and the flexible graphene film heat conduction cable is obtained. According to the method, the internal connection problem of the flexible section is solved by establishing a synergistic process of surface punching, double-layer coating and hot pressing, the heterogeneous connection problem of the flexible section and the shell is solved in a manner of sampling coating and brazing, and through the synergistic effect of all links, the overall performance and reliability of the heat-conducting cable are remarkably improved.

The invention relates to the technical field of active cables, in particular to an active cable made of black phosphorus-graphene oxide. The active cable is provided with a plurality of electrical cores, each electrical core comprises a pair of parallel wire assemblies, an outer shielding layer is arranged on the outer side of each wire assembly, and a wire pair shielding layer and a sheath layer are sequentially arranged on the outer side of each outer shielding layer in a sleeving mode; the wire assembly comprises an inner conductor and an inner shielding layer which are coaxially arranged, and the inner shielding layer wraps the outer side of the inner conductor; the inner surface of the outer shielding layer and the outer surface of the inner shielding layer form a cavity, and the cavity is filled with an insulating layer. The inner shielding layer is a black phosphorus-graphene oxide film inner shielding layer. According to the active cable, the inner shielding layer made of black phosphorus-graphene oxide is arranged outside the inner conductor, so that the active cable has the advantages of long-distance transmission, high temperature resistance, good mechanical performance and the like.

The invention discloses functionalized graphene for removing tritium from radioactive waste liquid and a preparation method and application of a graphene film, the functionalized graphene is a flaky substance formed by stacking lamellar structures, and the distance between the stacked lamellar structures is 7.5-8.7. The preparation method comprises the following steps: preparing graphene oxide powder; performing sulfonation on the graphene oxide powder to obtain sulfonated graphene aerogel; performing carboxylation on the graphene oxide powder to obtain carboxylated graphene; and mixing and stirring the sulfonated graphene aerogel and carboxylated graphene to obtain the functionalized graphene. The tritium in the tritium-containing liquid is separated by utilizing the membrane formed by the functionalized graphene, and the tritium removal technology has the advantages of mild reaction conditions, low energy consumption, easiness in large-scale production and the like.

The invention discloses an in-plane and out-plane bidirectional high-strength graphene heat-conducting film and a preparation method and application thereof.A small amount of epoxy resin is filled into a graphene film through a vacuum impregnation technology, interlayer stress transmission efficiency is improved by means of a tenon-and-mortise-like structure formed by the epoxy resin in air holes, and lamella slippage is inhibited; according to the present invention, the in-plane strength is increased to 2 times (63.3 MPa) of the conventional film, the out-plane strength is increased to 6 times (182.6 kPa), and the epoxy resin has characteristics of low ratio and non-continuous distribution so as to maintain the high level of 1325 W / mK of the heat conductivity coefficient. The method has the advantages of easily available raw materials and simple process, and provides a feasible path for industrialization of graphene materials.

The invention relates to a flexible high-thermal-conductivity graphite cold chain which comprises a graphene film laminated body and two metal terminals arranged at the two ends of the graphene film laminated body, and the part, fixed by the metal terminals, of the graphene film laminated body is a rigid section of the graphene film laminated body. The part, which is positioned between the two metal terminals and is not fixed, of the graphene film laminated body is a flexible section of the graphene film laminated body; and the flexible section of the graphene film laminated body is wrapped with a polyimide film. A glue filling groove is formed in the metal terminal; and heat-conducting glue is filled between the metal terminal and the rigid section of the graphene film laminated body. According to the invention, the high-thermal-conductivity graphene film and the metal terminal are compounded by filling the assembly gap with the heat-conducting glue, so that the contact thermal resistance of the edge of the laminated graphite film and the metal terminal is greatly reduced, and the heat transfer path in the thickness direction of the graphite cold chain is improved, thereby achieving the effect of improving the heat-conducting property of the graphite cold chain.

The invention belongs to the technical field of functional films, and particularly relates to a preparation method of a high-thickness graphene heat conduction film. Comprising the following steps: (1) low-functionalized graphene powder is taken as a raw material, the content of an additive in the raw material is not more than 20wt%, and the solvent content is not more than 10wt%; (2) carrying out hot press molding on the raw materials in the step (1) at the temperature of 25-300 DEG C to obtain a dense graphene thick film; and (3) carrying out heat treatment on the dense graphene thick film in the step (2) in an atmosphere furnace with the temperature of 1000-3300 DEG C for a certain time to ensure interlayer ordering and crystal graphitization, so as to obtain the graphene heat-conducting film with high thickness and high heat conductivity, the thickness of the graphene heat-conducting film can reach more than 200 microns, and the heat conductivity of the graphene heat-conducting film can reach more than 1300W / mK. The preparation method is simple in operation process, low in cost, easy in scale amplification and suitable for preparation and performance improvement of the ultra-high-thickness graphene heat-conducting film, and the application range of the graphene film in the fields of heat management, electromagnetic shielding, nuclear technology, high-end instrument equipment and the like is widened.

The invention belongs to a thermal interface material of electronic equipment, and particularly relates to a thermal interface material with high thermal conductivity and electric conductivity as well as a preparation method and application thereof. The thermal interface material with high thermal conductivity and electric conductivity comprises graphene films and oriented carbon fiber / silica gel composite layers which are alternately stacked, in the thermal interface material with high thermal conductivity and electric conductivity, the graphene films are neatly arranged in the vertical direction. The carbon fibers are also directionally arranged in the vertical direction and are almost parallel to the graphene film, and part of the carbon fibers are in direct contact with the graphene film; the raw materials of the carbon fiber / silica gel composite layer comprise a silica gel matrix, carbon fibers and ceramic micro powder. The graphene film has a core heat conduction function, and the oriented carbon fiber not only shares transmission work of part of heat, but also converges the heat to a graphene film trunk. The ceramic particles form a bridging structure in the interface area to reduce interface thermal resistance. Direction deflection and scattering loss in heat flow transfer are reduced to the maximum extent, and the problem of'heat conduction island 'of a traditional composite material is solved through the synergistic effect of multi-scale paths; the heat-conducting property and the mechanical property of the material are synergistically improved.

The invention discloses a preparation method of a high-elasticity low-thermal-impedance graphene thermal interface material, which comprises the following steps: vertically dripping graphene oxide slurry on a substrate to form a graphene oxide gel array with a pre-oriented structure, and finally depositing the graphene oxide slurry on the surface to obtain the high-elasticity low-thermal-impedance graphene thermal interface material. And drying to obtain a graphene oxide film with certain vertical orientation inside, and carrying out chemical reduction foaming and high-temperature graphitization to obtain the thermal interface material. In the foaming process, oxygen-containing functional groups on the surface of the graphene oxide are converted into gas, graphene sheets are expanded, physical crosslinking is formed at the edge lap joint positions of the graphene sheets due to the pi-pi conjugation effect, and a quadrilateral-like structure is formed. Compared with a horizontally formed graphene film, the material has the advantages that the proportion of the internal graphene sheets arranged along the vertical direction is higher, the horizontal heat conduction capability is improved, better compression resilience is provided, the thermal impedance is reduced, and the material has wide application potential in the field of thermal interface materials.

The invention discloses a graphene-based heat conduction film with a stable interface and a preparation method of the graphene-based heat conduction film. When the graphene film is prepared, a substrate with a reticulate pattern structure with a specific size is utilized, on one hand, separation of a graphene oxide precursor film with high surface energy from a matrix is facilitated, and on the other hand, more stable nucleation sites and interlocking interfaces are provided for in-situ growth of subsequent carbides. According to the in-situ growth method, a layer of superhard carbide coating which is compact in structure and is combined through strong chemical bonds can be generated on the surface of graphene in situ, the carbide coating can form a superstable interface with graphene, the graphene film is effectively protected, and the abrasion resistance, impact resistance and space environment erosion resistance of the graphene film are greatly improved.

According to the graphene film, the graphene film module and the electronic equipment carrying the graphene film or the graphene film module, the graphene film or the graphene film module can emit heat in a power-on state and dissipate heat in a power-off state, and the graphene film or the graphene film module can emit heat in a power-off state; therefore, the heating requirement of the electronic equipment when the electronic equipment is used in a low-temperature environment and the heat dissipation requirement of the electronic equipment when the electronic equipment is used with high power consumption are met.

The present invention relates to the technical field of graphene film manufacturing, specifically a tensile testing device and method for graphene film manufacturing, comprising a test bench, a stretching mechanism, a die portion, an implementation portion, and a smoothing portion. In the present invention, the two die portions are exchanged up and down, and the lower die plate is continuously moved downward to separate from the implementation bar to achieve the reassembly action, thereby being able to automatically and randomly perform the tensile testing action of the graphene film in the graphene film roll, without the need to repeat the clamping and disassembly steps multiple times, thereby improving the convenience and efficiency of the tensile testing process and facilitating batch multiple tensile tests. Secondly, the tensile stress is evenly distributed on the graphene film by the mutual approaching action of the corresponding two smoothing plates in the smoothing portion, thereby avoiding the introduction of additional stress concentration points due to wrinkles or bent parts, reducing errors, and improving the accuracy of the data.

The invention provides a die-casting forming method of a graphene heat-conducting film, the graphene heat-conducting film and application of the graphene heat-conducting film, and relates to the technical field of graphene films.The die-casting forming method of the graphene heat-conducting film comprises the following steps that graphene oxide powder is scraped to be flat on a graphene oxide film of a first metal plate to be subjected to rewetting treatment; pressing the powder subjected to the rewetting treatment through a graphene oxide film of a second metal plate, and then performing die-casting shaping and high-temperature heat treatment to enable graphene oxide sheet layers to be subjected to self-assembly and demolding, so as to obtain a graphene oxide film with a high-entropy system structure; removing sulfate radicals from the graphene oxide film to obtain the graphene heat-conducting film. According to the preparation method, the disordered and unsystematic sorting characteristic of the graphene oxide powder is utilized, direct die-casting shaping is conducted, a high-entropy system structure is constructed, after the film is formed through high-heat-moisture treatment, sulfate radicals are removed, the graphene heat conduction film with the high Z-axis direction heat conduction performance is obtained, and the problem that the graphene film prepared through a traditional coating technology is low in Z-axis direction performance is solved.

The invention provides a preparation method of a graphene film with high thermal conductivity in a Z-axis direction, the graphene film with high thermal conductivity in the Z-axis direction and application of the graphene film, and relates to the technical field of graphene. The preparation method comprises the following steps: carrying out air crushing treatment on low-solid-content graphene oxide slurry to enable micron-sized air bubbles to be attached to the surface of a sheet layer of graphene oxide, so as to obtain low-solid-content gas-dissolved graphene oxide slurry; preparing the low-solid-content dissolved gas graphene oxide slurry into high-solid-content dissolved gas graphene oxide slurry; carrying out homogenizing and stripping treatment on the high-solid-content gas-dissolved graphene oxide slurry to obtain homogenized graphene oxide slurry; the homogenized graphene oxide slurry is subjected to coating, drying and heat treatment in sequence, and the graphene film with the high thermal conductivity in the Z-axis direction is obtained. According to the preparation method disclosed by the invention, the tiling order of the graphene sheet layers in the X-Y direction is broken, and the cardinal number of the graphene sheet layers arranged in the Z-axis direction is increased, so that the heat-conducting property in the Z-axis direction is improved.

The application provides a large-area graphene film and a rapid preparation method thereof, and belongs to the technical field of two-dimensional nanomaterials and inorganic film preparation. The preparation method comprises the following steps: adding graphene and an auxiliary agent into a solvent and uniformly mixing to obtain a graphene dispersion liquid; performing blade coating or suction filtration treatment on the graphene dispersion liquid, so that the graphene dispersion liquid is uniformly deposited on a polymer base film; performing drying treatment to obtain a polymer base film with an attached graphene layer; submerging the polymer base film with the attached graphene layer in a solution, so that the graphene layer in the polymer base film with the attached graphene layer is separated from the polymer base film and suspended on the surface of the solution, and the graphene layers are assembled to form a large-area graphene film. The method is based on the graphene dispersion liquid, a graphene conductive film is formed by blade coating or suction filtration, and then a large-area continuous graphene film is assembled on the surface of the solution under the action of the auxiliary agent, so that the production efficiency is high, the device is simple, the cost is low, and the method is suitable for industrialization.

This invention discloses an interlayer confined piezoelectric composite film of graphene oxide, its electric field-driven preparation method, and its application. The preparation method includes: preparing a graphene oxide dispersion using the Hummers method and filtering it to form a graphene oxide film; placing the graphene oxide film in an electric-driven device, introducing different precursor solutions on both sides of the film, and driving the precursor components to migrate into the interlayer confined space of the graphene oxide under the action of an applied electric field; under the synergistic effect of electric field driving and interlayer confinement, the precursors entering the interlayer react and crystallize in situ to form a piezoelectric functional phase. The prepared composite film can generate piezoelectric polarization under mechanical stimulation conditions and can be used for ion selective adsorption / separation, especially suitable for the selective adsorption / separation of uranium and vanadium ions in high-salt water systems. This invention achieves a synergistic improvement in interfacial charge regulation and ion selectivity regulation by constructing a piezoelectric functional phase in situ within the interlayer confined space of graphene oxide.

This invention discloses a coating, winding, and hot-pressing production line for processing multilayer graphene films, relating to the field of graphene film processing equipment, including a coating mechanism, a winding mechanism, and an extrusion mechanism. The winding mechanism of this invention is equipped with an air pump, a take-up rod, a first hollow rod, a second hollow rod, air bladders, and ventilation holes. Before winding the graphene film, the air pump inflates the first hollow rod, causing the two air bladders to expand. The graphene film coated with the coating is then wound onto the two air bladders. A drive assembly rotates the take-up rod, further winding the graphene film onto the two air bladders. When the required thickness of the graphene film wound onto the air bladders is achieved, the graphene film is cut, and the air inside the air bladders is released. The contracted air bladders separate from the rolled graphene film, facilitating the removal of the rolled graphene film from the two second hollow rods.

The invention relates to the technical field of lumbar vertebra supporting, in particular to an intelligent lumbar vertebra supporting control method based on a graphene film and a rehabilitation device.The method comprises the steps that multi-modal data collection is conducted, specifically, multi-modal physiological and motion signals of the waist and abdomen of a user are collected; intelligent state analysis: inputting the multi-mode signal into a pre-trained intelligent control model for analysis and processing, outputting a comprehensive evaluation result of the waist load, muscle tension and thermal comfort of the user, and analyzing the current waist physiological state, specific activity mode and thermal therapy implementation demand of the user; comprehensive self-adaptive regulation and control: generating a cooperative control instruction according to the waist physiological state, the specific activity mode, the spine traction requirement and the thermal therapy implementation requirement which are obtained through analysis; the device comprises a processor and a memory in communication connection with the processor. According to the application, real-time and comprehensive understanding of the waist state of the user is realized, and synchronous and self-adaptive fine regulation and control are performed on two core functions of support and thermal therapy according to the real-time and comprehensive understanding of the waist state of the user.

The application discloses a high-efficiency energy-saving door and window glass structure based on graphene heat conduction regulation and a manufacturing method, relates to the field of door and window glasses, and comprises an outer frame plate, an inner frame plate and a controller, the inner frame plate is fixedly connected to the inner wall of the outer frame plate, and the controller is embeddedly installed on the side wall of the outer frame plate, characterized in that the inner frame plate comprises a fixed frame two, outer layer glass, middle layer glass and inner layer glass, and the outer layer glass, the middle layer glass and the inner layer glass are all fixedly connected to the inner wall of the fixed frame two. The graphene nanobelt directional heat conduction film is arranged along the glass normal direction by the magnetic field induced electrophoretic deposition technology, an efficient heat conduction path perpendicular to the glass surface is constructed, cold energy can be quickly conducted out in winter, and heat flow is blocked in summer; indoor heat preservation is enhanced in winter through the graphene film directional heat conduction; in summer, the phase change material is combined with melting heat absorption, indoor heat gain is reduced by more than 30%, and high-efficiency energy saving is realized.

The utility model provides an inverter and an energy storage system. The inverter comprises a housing; the circuit board is arranged in the shell; the power module is arranged on the circuit board and is electrically connected with the circuit board; the heat conduction layer is arranged on the side, away from the power module, of the circuit board and used for conducting heat exchange with the circuit board, and at least one part of the heat conduction layer comprises a graphene film layer. When heat generated by the power module and the circuit board is transferred to the graphene film layer, the heat is quickly transferred in the direction perpendicular to the thickness direction of the graphene film layer and is dispersed to the periphery of the graphene film layer, so that the situation that the heat is concentrated in the area where the power module is located and cannot be effectively dissipated, and consequently the power module is too high in temperature rise and fails is avoided; the overall temperature of the graphene film layer is roughly the same, the purpose of rapidly balancing heat generated by the power module is achieved, the heat dissipation requirement of a high-power and high-heat-consumption inverter is met, the service life of the inverter is prolonged, and the reliability of the inverter is improved.