72 results about "Fiber carbon" patented technology

The invention discloses a carbon fiber sizing agent composition suitable for thermoplastic resin, sized carbon fiber, a carbon fiber sizing agent as well as a preparation method and application of the carbon fiber sizing agent, belongs to the technical field of carbon fiber sizing agents, and solves the problem that a sizing agent in the prior art cannot meet excellent mechanical properties and high temperature resistance at the same time. The composition is prepared from the following components in parts by weight: 15 to 35 parts of modified polyaryletherketone resin matrix, 0.3 to 2 parts of neutralizer, 1 to 3 parts of emulsifier, 1.5 to 3 parts of defoaming agent and 57 to 80 parts of deionized water. The sizing agent containing the composition has good wettability and film-forming property on the surface of the carbon fiber, and meanwhile, the sizing agent is matched with other components with specific contents in the composition, so that the carbon fiber sizing agent containing the carbon fiber sizing agent composition has excellent heat resistance, can bear processing at the high temperature of 350 DEG C or above, and has good application prospects. And the composite material containing the sizing agent has excellent interlaminar shear strength.

The invention provides a micro-miniature semi-tilting unmanned aerial vehicle and a control method thereof.The unmanned aerial vehicle comprises a main body structure, a coaxial double-paddle system, a tilting double-rotor system, a full-motion control surface assembly, a flight control system and a power supply assembly; the main body structure is composed of a carbon fiber carbon plate, a carbon tube and a 3D printing photosensitive resin part, and light weight and rigid supporting are achieved; the coaxial double-propeller system provides main lift force and counteracts reverse torsional moment; the double-rotor system is tilted, and a lift force / thrust mode is switched; the pneumatic efficiency of the tilting rotor wing is improved by the full-motion control surface assembly; the control method comprises a low-speed mode and a high-speed forward flight mode, the vertical take-off and landing, hovering and high-speed cruising are integrated, the structure is simplified, the stability is improved, and the cost is low.

The invention belongs to the technical field of preparation of electromagnetic wave-absorbing and heat-insulating materials, and discloses a composite wave-absorbing and heat-insulating material and a preparation method and application thereof.The preparation method comprises the steps that coconut fiber carbon aerogel is prepared, then C / SiC nanowire composite aerogel is prepared from the coconut fiber carbon aerogel and silicon dioxide dry gel powder, the pretreated C / SiC nanowire composite aerogel is soaked in a ZIF-8 precursor solution, and the ZIF-8 precursor solution is dried to obtain the composite wave-absorbing and heat-insulating material. The composite wave-absorbing and heat-insulating material with specific orientation arrangement is obtained. The prepared composite material has a three-dimensional connected network structure arranged in a specific orientation mode, is high in wave absorbing performance, wide in absorption frequency band, good in heat insulation performance and low in density, can effectively absorb electromagnetic waves of different wave bands by adjusting the ZIF-8 loading capacity, and has important application value in the fields of electromagnetic wave absorbing, high-temperature heat insulation and the like.

The application discloses a carbon fiber-carbon nanotube thermal interface material and a preparation method thereof. The preparation method comprises the following steps: pretreatment of carbon fibers, modification of carbon fibers, orientation of carbon fibers, growth of carbon nanotubes and polymer compounding. The preparation method of the carbon fiber-carbon nanotube thermal interface material realizes orientation of carbon fibers and compounding of carbon nanotubes, a primary heat conduction network is formed by the oriented carbon fibers to directly conduct heat; and a secondary heat conduction network is formed by the carbon nanotubes grown in situ on the surface of the carbon fibers to connect the oriented carbon fibers and assist heat conduction, thereby constructing a double heat conduction network. Through the synergistic effect of the double heat conduction network, the in-plane thermal conductivity and the plane-through thermal conductivity of the composite material are improved. Meanwhile, a polymer matrix is used as a matrix, air in the gap between a chip and a package can be fully extruded, the contact thermal resistance between the chip and the package is effectively reduced, and the thermal conductivity of the thermal interface material is improved.

The embodiment of the invention discloses a flow field diffusion layer integrated structure, a preparation method thereof and an electrolytic bath, and belongs to the technical field of water electrolysis hydrogen production, and the flow field diffusion layer integrated structure comprises a flow field structure, a gas diffusion layer and a first binder. The flow field structure and the gas diffusion layer are arranged in a stacked mode in the first direction, the first bonding layer is arranged between the flow field structure and the gas diffusion layer, and the material of the first bonding layer comprises at least one of nickel powder, titanium powder, nickel fibers, titanium fibers, a carbon-based material and a high polymer material. The flow field structure, the first bonding layer and the gas diffusion layer form an integrated structure. According to the flow field diffusion layer integrated structure, the mass transfer efficiency can be improved, the dynamic response performance is improved, the energy efficiency is guaranteed, and the service life is prolonged.

The invention discloses an ultrathin flexible ceramic plate as well as a preparation method and application thereof. The ultrathin flexible ceramic plate is prepared from the following raw materials: cordierite powder, PAN (Polyacrylonitrile) fiber, polysiloxane, nano Al2O3, aluminum dihydrogen phosphate sol and a fluorocarbon resin composite coating. The preparation method comprises the following steps: 1) pretreatment; 2) freezing and casting; 3) heat treatment and carbonization; 4) fluorocarbon coating process and hot isostatic pressing; the preparation method comprises the following steps: firstly, carrying out freeze casting to obtain a ceramic plate matrix, and carrying out hot pressed sintering on the ceramic plate matrix to carbonize PAN fibers into carbon fibers to obtain high-strength single-layer ceramic sheets and composite ceramic sheets, so as to obtain the flexible ceramic plate. The obtained ultra-thin flexible ceramic plate is high in strength and toughness, resistant to high temperature and good in sound insulation and heat insulation effect, through precise configuration and chemical coupling of the components, the problem that a ceramic material is crisp if being strong and weak if being thin is solved, and a new scheme is provided for industrialization of flexible ceramics.

The invention relates to the field of carbon fiber preparation, and discloses a carbon fiber in-situ carbonization method which is characterized in that in the process of realizing PAN fiber pre-oxidation and carbonization in a tubular furnace, the PAN fiber is subjected to in-situ carbonization through the change of a carbonization boundary caused by the movement of a furnace plug; the effective pre-oxidized fibers between the pre-oxidized boundaries in the pre-oxidized process before the furnace plug moves are all located in the carbonization boundary entrainment, so that the phenomenon that the PAN fibers are burnt out in the carbonization process due to the influence of the carbonization process on the non-effective pre-oxidized fibers is avoided, and finally the carbon fibers in a fixed carbonization mode are obtained.

The present invention addresses the problem of improving carbon fiber productivity.　This method for producing fibers comprises a step for producing carbon fiber precursor fibers by solution spinning using a spinning dope that is a mixed solution comprising a low-molecular-weight carbon compound containing pitch, a high-molecular-weight carbon compound containing a polybenzimidazole derivative, and a solvent.

This invention relates to the technical field of tubing, and more particularly to a ceramic-based composite tubing and its preparation method. The ceramic-based composite tubing comprises the following components by weight: 40-60 parts silicon carbide, 20-30 parts clay, 10-15 parts silicon dioxide, 5-15 parts alumina, 5-10 parts silicon powder, and 5-15 parts reinforcing filler, wherein the reinforcing filler is selected from any one or more of carbon fiber, silicon carbide fiber, and carbon nanotubes. The preparation method of the ceramic-based composite tubing includes the following steps: S1, raw material weighing: The raw material is ball-milled and sieved to obtain powdered raw material; the powdered raw material is mixed with clay, dry-pressed, and dried to obtain the material to be sintered; S2, sintering. The combination of alumina and silicon carbide allows silicon carbide to act as a second phase, fixing and strengthening grain boundaries, and shielding cracks, improving the hardness and toughness of the tubing and extending its service life.

The invention provides a preparation method of a carbon nanotube modified ceramic-based composite material, which can solve the problems that a metal catalyst needs to be adopted when CNTs grow, the catalyst is difficult to completely remove subsequently, the intrinsic performance of the CNTs is influenced, and the high temperature resistance of the composite material is further influenced in the existing method. The method comprises the following steps: adding tetraethoxysilane, a first alcohol reagent, a second alcohol reagent and deionized water into a container to obtain a first mixed solution; dropwise adding a polyethylene glycol solution into the first mixed solution, and continuously stirring until the mixture is fully mixed to obtain a second mixed solution; dropwise adding an acid solution into the second mixed solution, and continuously stirring until the solution is in a clear and transparent state to obtain a silicon dioxide precursor solution; immersing fibers, carbon cloth or a preform prepared in advance into the silicon dioxide precursor solution, and drying to obtain fibers, carbon cloth or a preform coated with a porous non-metal catalyst film on the surface; and growing a carbon nano tube to obtain the carbon nano tube modified ceramic matrix composite material.

The invention discloses a preparation method of a short-fiber carbon-carbon composite material, which comprises the following steps: putting short carbon fibers into a net basket, dipping in a resin solution mixed with carbon powder, filtering, drying, putting into a mold, carrying out hot-pressing curing molding, and carbonizing to obtain the short-fiber carbon-carbon composite material. The density of the carbon-carbon composite material is larger than or equal to 1.30 g / cm < 3 >, the density difference of different thickness layers is smaller than 0.1 g / cm < 3 >, and the thickness of the carbon-carbon composite material can be larger than 50 mm. The preparation method is short in production period and low in energy consumption, the production cost is remarkably reduced, the shape can be designed, and the carbon-carbon composite material is suitable for large-scale production. The density of the super-thick product in the thickness direction is still uniform.

This invention discloses a carbon fiber reinforced antistatic and flame-retardant aramid fiber composite paper and its preparation method. The antistatic and flame-retardant aramid fiber composite paper adopts a sandwich structure. The top and bottom layers are made of a slurry composed of aramid fiber nanofibers, LDH / MXene composite functional materials, and a dispersant, imparting electromagnetic wave absorption properties and surface flame-retardant protection. The middle core layer is made of a slurry composed of aramid fiber chopped strands, aramid precipitated strands, carbon fiber chopped strands, and a dispersant, forming a supporting framework and constructing a bulk conductive network to ensure the mechanical strength and overall conductivity of the composite paper. Through multi-channel gradient papermaking and programmed temperature-controlled hot pressing processes, interlayer bonding and structural stability are achieved, enabling the material to maintain the inherent high-temperature resistance and flame-retardant properties of aramid fiber while also possessing synergistic properties of antistatic properties, electromagnetic shielding absorption, and high mechanical strength. This effectively solves the technical challenge of traditional materials struggling to achieve multiple functions simultaneously.

This invention discloses a high-reliability composite cable for military aircraft and its manufacturing method, comprising an external load-bearing skeleton, an outer protective layer on the surface of the external load-bearing skeleton, an internal conductive core assembly disposed in the internal cavity of the external load-bearing skeleton, and a filling isolation layer between the external load-bearing skeleton and the internal conductive core assembly. This invention proposes a biomimetic skeletal structure, subverting the traditional inside-out layered structure into an outside-in skeleton-medullary cavity structure; the external load-bearing skeleton simultaneously undertakes mechanical protection and electromagnetic shielding functions, while the internal cavity integrates the internal conductive core assembly; PBO fiber, silicon carbide fiber, and OAPS modified cyanate ester work synergistically to achieve a balance of mechanical, thermal, and electrical properties; and an integrated molding process of forming the external load-bearing skeleton, positioning the internal conductive core assembly, and low-pressure injection filling eliminates the multi-layer interface of traditional cables, fundamentally solving the problem of delamination failure; it also possesses ultra-high strength, extreme environmental tolerance, and low-loss signal transmission capability.

The application belongs to the field of composite materials, and particularly relates to an in-situ hydrogen bond reinforced aramid nanofiber / carbon nanotube composite fiber and a preparation method thereof. The application first performs hydrophilic treatment on a carbon nanotube fiber, then places the treated carbon nanotube fiber in an aramid nanofiber solution for infiltration, places the carbon nanotube fiber in a proton donor coagulation bath for infiltration, finally places the carbon nanotube fiber in a shrinkage solvent for infiltration, and dries to obtain the in-situ hydrogen bond reinforced aramid nanofiber / carbon nanotube composite fiber. By introducing a hydrogen bond into a nanochannel of the carbon nanotube, the mechanical property of the carbon nanotube fiber is effectively improved, and the application scenario of the carbon nanotube fiber can be widened.

The invention discloses C200 ultra-high performance concrete which comprises the following components: a cementing material, fine aggregate, a polycarboxylic acid water reducer, steel fibers, carbon fibers and water, the cementing material is prepared from the following components in parts by weight: 64 to 68 parts of Portland cement, 10 parts of fly ash microbeads, 14 to 16 parts of silica fume and 6 to 10 parts of carbide slag; the addition amount of the polycarboxylic acid water reducer is 1.5-1.7% of the total weight of the cementing material; the mixing amount of the steel fibers is 2.0-3.0% of the total volume of the concrete, and the mixing amount of the carbon fibers is 0.3-1.0% of the total volume of the concrete; the water-binder ratio of the concrete is 0.14 to 0.18; the weight ratio of the cementing material to the fine aggregate is (0.9-1.1): 1. Through the synergistic effect of excitation of the high-activity carbide slag, hybrid reinforcement of the steel fiber and the recycled carbon fiber and gradation of the aggregate, the 7d strength which is larger than or equal to 200 MPa is successfully prepared, the concrete further has excellent toughness which is difficult to achieve by single steel fiber ultra-high performance concrete, and unification of ultra-high strength and ultra-high toughness is achieved.

The application discloses high-strength anti-cracking foam concrete and belongs to the technical field of concrete. The concrete is prepared from the following raw materials in parts by weight: cement 200-300 parts, silica ash 10-20 parts, fly ash 20-40 parts, foaming agent 1-2 parts, fine aggregate 5-15 parts, foam stabilizer 1-3 parts, modified bamboo fiber-carbon nanotube composite material 5-10 parts, water reducing agent 0.5-1 part and water 120-130 parts. The high-strength anti-cracking foam concrete obtained by mixing and stirring the modified bamboo fiber-carbon nanotube composite material prepared by a specific method and other raw materials has the characteristics of low dry density, high strength, excellent anti-cracking performance and the like, and has a good market application prospect.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a high-activity iron tailing-based composite cementing material. Aiming at the problem of insufficient activity caused by low calcium and aluminum content and high magnesium content of low-silicon iron tailings (SiO2 is 15.3%-30%), mineral powder is taken as a mineral admixture, sepiolite nanofiber, carbonic anhydrase and nano cerium oxide are taken as a composite activator, 1-ethyl-3-methylimidazolium chloride is taken as a grinding aid, and a mechanical grinding process is combined, so that the gelling activity of the iron tailings is remarkably improved. The method comprises the following steps: 1) crushing and screening iron tailings; 2) mechanical-chemical grinding activation; and 3) preparing the composite cementing material. The chemical component defects of the iron tailings are compensated through the high-calcium and medium-aluminum characteristics of the mineral powder, the sepiolite nanofiber provides a fiber reinforcement effect and an active silicon magnesium source, carbonic anhydrase catalyzes CO2 conversion to promote carbonate solidification, nano cerium oxide regulates the hydration process and stabilizes magnesium ions, a C-S-H / N-A-S-H double-gel system is formed, and the high-calcium and medium-aluminum double-gel system is formed. The 28d compressive strength is improved by 40% or above compared with that of an unactivated system, the solid waste utilization rate reaches 30%, and MgO expansion is effectively inhibited.

The utility model belongs to the auxiliary field of waste silk collection in the start-stop and abnormal process of carbon fiber and precursor production, and particularly relates to an automatic waste silk collector in the carbon fiber production process. The device is composed of a set of counter-rotating type roller shafts, gears, a variable frequency motor, a cooling induced draft fan, a ton bag fixing device, an overall framework and a movable pulley block, a clamp-shaped protective cover is installed at the inlet end of each counter-rotating type roller shaft for protection, the situation that hands make contact with the roller shafts to be wound in, and mechanical damage is caused is prevented, and waste silk collection is facilitated through openings in clamp-shaped strips. Through the synergistic effect of mechanical transmission and wind power guiding, the problems of winding and scattering in the carbon fiber waste silk collecting process are effectively solved, and the device has the remarkable advantages of being high in collecting efficiency, high in equipment stability, convenient and fast to operate and maintain and the like.

This invention discloses a carbon fiber / carbon nanotube fiber composite carbon-based material, its preparation method, and its application. The method involves sequentially and alternately layering carbon cloth, matrix carbon, and carbon nanotube films to form a green embryo. Under vacuum conditions, the green embryo is subjected to hot pressing, sintering heat treatment, and programmed cooling to obtain the carbon fiber / carbon nanotube fiber composite carbon-based material. This method directly combines carbon cloth and carbon nanotube films, avoiding the technical problem of poor carbon nanotube growth due to the inertness of the material surface during in-situ growth, which leads to poor reinforcement and toughening effects on the carbon cloth. Furthermore, the matrix phase of matrix carbon is directly added during the preparation process. The composite carbon-based material is obtained after a single hot pressing, sintering heat treatment, and programmed cooling step. The preparation method is simple and has a short preparation cycle.

The invention relates to a carbon nanotube composite precursor fiber, a carbon nanotube composite material as well as a preparation method and application of the carbon nanotube composite precursor fiber. The carbon nanotube composite precursor fiber is prepared from the following raw materials: a carbon nanotube, an acid solution and a functional material, the carbon nanotube composite precursor fiber is prepared by liquid crystal spinning, and the liquid crystal spinning comprises the following steps: (1) mixing a carbon nanotube with an acidic solution for the first time, and then mixing the mixture with a functional material for the second time to obtain a carbon nanotube composite precursor solution; and (2) immersing the carbon nanotube composite precursor solution into a coagulating bath, and coagulating to obtain the carbon nanotube composite precursor fiber. The carbon nanotube composite material comprises the carbon nanotube composite precursor fiber. According to the invention, the carbon nanotube and the functional material are compounded by adopting a liquid crystal spinning process, so that the carbon nanotube composite material with high carbon nanotube content, high density, high orientation degree and excellent mechanical and electrical properties is prepared.

The invention relates to the technical field of ultrathin lithium metal negative electrodes, in particular to a fiber carbon reinforced ultrathin lithium foil and a preparation method and application thereof. The thickness of the ultrathin lithium foil is less than or equal to 20 microns, and the ultrathin lithium foil is prepared from a fibrous carbon material loaded with zinc oxide as a raw material; the preparation method of the zinc oxide-loaded fibrous carbon material comprises the following steps: soaking natural fibers in a zinc salt solution, fully stirring, taking out, drying, and carrying out high-temperature carbonization under an anaerobic condition. According to the ultrathin lithium foil disclosed by the invention, the carbon powder obtained by grinding the biochar material loaded with zinc oxide is added, so that the mechanical strength and ductility of lithium metal are greatly improved, and the ultrathin lithium foil is not easy to crack and damage in the rolling process and can be rolled to an ultrathin thickness of less than or equal to 20 microns. The lithium battery cathode prepared from the ultrathin lithium foil has relatively good electrochemical properties such as cycle performance and coulombic efficiency, and the preparation method is simple, low in cost and suitable for large-scale industrial production.

The invention relates to the technical field of building composite material manufacturing, and discloses a continuous flat pressing type wood fiber and carbon fiber composite flame-retardant wall material preparation device which sequentially comprises, in the production process direction, a paving unit used for guiding carbon fibers and wood fibers in a layered mode and converging the carbon fibers and the wood fibers on a conveying device to form an initial blank of a sandwich structure; the fiber implanting and micro-channel constructing unit is arranged behind the paving unit and is used for implanting fibers on the surface layer of the initial blank into a core layer and constructing a micro-channel in the plate blank; the pre-pressing unit is arranged behind the fiber implantation and micro-channel construction unit and is used for carrying out wave deformation treatment on the plate blank and closing the micro-channel; and the continuous flat pressing machine is arranged behind the pre-pressing unit and is used for carrying out hot pressing forming and lateral restraining on the plate blank. The piezoelectric ceramic transducer is coupled to the back face of the convergence guide plate, the friction coefficient between fibers and the wall face is remarkably reduced through high-frequency micro-amplitude vibration, and the bridging effect caused by Van der Waals force between the fibers is effectively destroyed.

The application relates to a light nano heat insulation plate and a calcium carbide furnace, and relates to the technical field of calcium carbide furnace heat insulation protection. The light nano heat insulation plate is composed of the following components and mass fractions: nano ceramic material, light refractory aggregate, high-temperature binder, anti-cracking fiber and beta-silicon carbide. The nano ceramic material comprises alumina and silicon oxide; the light refractory aggregate comprises alpha-silicon carbide and hollow floating beads; the high-temperature binder comprises aluminum dihydrogen phosphate and silica sol; and the anti-cracking fiber comprises aluminum silicate whiskers and carbon fibers. The preparation method of the light nano heat insulation plate comprises the following steps: dry material preparation, mixed material dispersion, mold pressing, and drying and baking. The light nano heat insulation plate provided in the application has good anti-cracking performance on the basis of ensuring that the light nano heat insulation plate has mechanical strength and high-temperature insulation effect, can meet the high-temperature working condition requirements when applied to the calcium carbide furnace, and can further guarantee stable operation of the equipment.

The present invention relates to a method for manufacturing a hollow fiber carbon membrane, the method comprising a step (a) for preparing a carbon-membrane-forming stock solution and molding hollow fibers through a spinning method for subjecting the carbon-membrane-forming stock solution to non-solvent-induced separation using a double annular nozzle, a step (b) for winding the molded hollow fibers onto the outer periphery of a bobbin having a polygonal outer periphery, a step (c) for heating the wound hollow fibers while rotating the bobbin to perform a crosslinking treatment, a step (d) for raising the temperature of the post-crosslinking-treatment hollow fibers from a prescribed temperature and heating and infusibilizing the hollow fibers, and a step (e) for subjecting the hollow fibers subjected to the infusibilization treatment to a carbonization treatment, the carbon-membrane-forming stock solution containing polyphenylene oxide in an amount of 15-40 mass%, sulfur in an amount of 7-15 mass% with respect to the polyphenylene oxide, and a solvent capable of dissolving the aforementioned components.

The invention discloses a carbon fiber-carbon nanotube cross-scale reinforced polypropylene composite material and a preparation method thereof. The polypropylene composite material comprises the following raw materials in parts by mass: 60.69-95.60 parts of a polypropylene matrix; 10.70 to 31.45 parts of a carbon fiber-carbon nano tube compound; and 2.17 to 8.10 parts of a compatibilizer. Based on the adjustment of the content of each raw material component, the carbon fibers and the carbon nanotubes are assembled to form the carbon fiber-carbon nanotube compound, and then the carbon fiber-carbon nanotube compound, the polypropylene matrix, the compatibilizer and other processing aids are subjected to melt blending and granulation molding, so that the mechanical property and the heat-conducting property of the polypropylene composite material can be synergistically enhanced; the mechanical stability, the impact resistance and the thermal conductivity of the polypropylene composite material are remarkably enhanced, the product defects are reduced, the production loss is reduced, and the production continuity is improved.

The present application relates to alloy chopstick production technical field, specifically for a kind of high-strength high-temperature-resistant alloy chopstick preparation process and production device, process steps are: taking PPA, chopped glass fiber, carbon fiber, calcium carbonate, dendritic nylon lubricant, colorant, tris (nonylphenyl) phosphite and aluminum-magnesium alloy powder are input into mixed production structure and mixed, and mixed material is obtained;Again, it is introduced into extrusion production structure, after high-temperature heating treatment, the mixed material is in molten state, then it is guided out by screw thread guide rod;Again, the material guided out is extruded into strip, and is cut into granular shape, then alloy chopstick matrix is obtained by thermoplastic mold shaping;Finally, using electric tool, alloy chopstick matrix is cold finished and ground, and the alloy chopstick matrix is obtained;Production device includes extrusion production structure and mixed production structure;The alloy chopstick produced by the present application has the advantages of high-temperature-resistant mildew-resistant non-deformation, no harmful substances are generated;Meanwhile, after being reinforced by chopped glass fiber and carbon fiber, the material texture is hard, high-strength, and not easy to break.

The invention relates to the technical field of membrane separation, in particular to a silicon-containing copolyimide hollow fiber carbon molecular sieve membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: in an inert atmosphere, mixing diamine, dianhydride and an aprotic polar solvent, and carrying out condensation polymerization to obtain a copolymerized polyamide acid solution; mixing the copolymerized polyamide acid solution, a dehydrating agent and a catalyst, and carrying out imidization reaction to obtain copolymerized polyimide; spinning the copolyimide to obtain a hollow fiber membrane; and carrying out heat treatment on the hollow fiber membrane in an inert atmosphere to obtain the hollow fiber carbon molecular sieve membrane. The selectivity and separability of the membrane are further improved through a heat treatment or carbonization process, the hollow fiber carbon molecular sieve membrane has good heat stability and can be used for a long time in a high-temperature environment, the membrane material is simple in preparation process, low-cost production can be achieved, the energy efficiency of the membrane material in the gas separation process is high, and the membrane material is suitable for industrial production. And the operation cost can be reduced.

This invention relates to a tannic acid-modified MOF-based hybrid matrix hollow fiber carbon molecular sieve membrane, its preparation method, and its application. The method includes the following steps: S1, preparing tannic acid-modified MOF particles; S2, preparing spinning solution; S3, preparing a hybrid matrix precursor membrane; S4, carbonization. This invention is the first to design and successfully prepare a MOF-based hybrid matrix hollow fiber carbon molecular sieve membrane. By innovatively utilizing a tannic acid modification strategy, the interfacial compatibility between MOF particles and the cellulose matrix is ​​significantly improved, effectively enhancing the dispersion uniformity of MOF particles in the membrane matrix. This results in a hybrid matrix hollow fiber carbon molecular sieve membrane with uniform pore structure and excellent interconnectivity, achieving highly selective separation of the ethylene / ethane system. This provides a fundamental and innovative approach for the development of high-performance gas separation membranes. This invention achieves superior interfacial bonding and gas separation selectivity that are difficult to achieve with traditional hybrid matrix membranes.

Carbon nanotube / resin composite material based on acoustic resonance mixing belongs to the technical field of nanotube composite material, and comprises single-walled carbon nanotube, glass fiber, carbon fiber, spherical nanometer silicon dioxide and thermoplastic resin powder components; the preparation method of the carbon nanotube / resin composite material based on acoustic resonance mixing comprises three processes.The present application aims at the problems of traditional single-walled carbon nanotube (SWCNTs) / thermoplastic resin composite material preparation, such as uneven dispersion caused by easy agglomeration of SWCNTs, weak interface combination and performance degradation, etc., and the finished product prepared by using SWCNTs, thermoplastic resin powder, glass fiber, carbon fiber and spherical nanometer silicon dioxide as raw materials through acoustic resonance mixing equipment has the tensile strength improved by 70%, the thermal conductivity coefficient more than 80%, the surface resistivity reduced by 7-10 orders of magnitude, excellent mechanical properties, thermal conductivity and anti-static performance, and is especially suitable for application in the fields of automobile parts, electronic shell and the like.In summary, the present application has good application prospect.

The application discloses a kind of high-performance micro-nano composite material and preparation method thereof, it is related to the field of nano composite material.The application is first carbon source and silicon source are mixed, add pore forming agent to form porous preform, then use high-power microwave heating, prepare network-like silicon carbide fiber.The application is first used grid-like silicon carbide fiber, silicon carbide powder, mixed and dissolved to form preform, use nano zirconium dioxide as modified material, then add titanium dioxide gel, titanium dioxide gel enters pore, solidification and crystallization will occur to titanium dioxide when sintering, simultaneously form a layer of titanium dioxide film in sintering process, increase bonding strength, improve material performance.The micro-nano porous composite ceramic prepared by the application uses network-like silicon carbide fiber as skeleton, connects silicon carbide powder and nano zirconium oxide, and forms double-layer ceramic structure by compounding titanium dioxide, with high carrier strength, strong toughness, and three-dimensional communication, internal structure is stable under high impact, and performance is superior.