5793 results about "Nanotube" patented technology

Improved performance ion exchange membranes for use in REM, AEM and DMFC fuel cells, buffered fuel cells, hydrolysis, other applications comprise a molecular matrix of homopolymers, di-monomer, heteropolymers, copolymers, or block-polymers of fluorocarbon and hydrocarbon compounds combined with (i) skeletal support grid to improve durability, handling, reduce membrane swelling, and sequester dopants and nanoparticles from leakage; (ii) microporous membrane formed using a sacrificial filler process enhancing conductivity and limiting fuel crossover; (iii) hetero-ionomeric matrix of two-or-more membrane-bound acids e.g. sulphonic and phosphonic acid expanding usable range; (iv) permanent fillers enhancing conductivity and porosity including nanoparticles, metal-oxides, zeolites, silicates, GOs, CNTs, MOFs, POSS, and others; (v) ionic liquid doping to enhance membrane conductivity; (vi) membrane nanocoating preventing H2O2 diffusion; and / or (vii) catalytic nanocoating with metals, metal-oxides, and MOFs preventing atmospheric toxin catalyst poisoning. Combined with a heterogenous GDI, the IEM is integrated into iBFC power blade and energy bank applications.

The invention relates to a preparation method of a high-durability multifunctional super-hydrophobic coating. According to the method, a mixed solution of an adhesive and hydrophobic modified nanoparticles is subjected to phase separation through non-solvent induction, so that the hydrophobic modified nanoparticles are coated on the outer layers of adhesive particles to form a uniform suspension, and finally, a micro-nano structure dispersed on the surface and inside of a coating can be obtained. After the surface layer is worn, the newly exposed surface still has an excellent micro-nano structure, namely super-hydrophobic performance; on the other hand, the nanotubes (wires) are added into the suspension, so that the mutual connection among the adhesive particles is further enhanced, and finally, the firm super-hydrophobic coating can be obtained. The super-hydrophobic coating provided by the invention has excellent durability, chemical stability, ultraviolet resistance and thermal stability, and functions of photo-thermal, electric heating, antibiosis, easy deicing, high thermal conductivity and the like, is suitable for various base materials, and is easy to realize large-scale preparation.

The invention discloses an AI-assisted carbon nanotube growth control method and system, and relates to the technical field of control systems. Comprising the steps that a three-dimensional AI virtual platform builds a carbon nano tube model by collecting carbon nano tube growth data and environment data in unit time, the growth data comprise the growth rate, the direction and the diameter size, the environment data relates to gas flow and electric field intensity, the carbon nano tube model is mapped into a three-dimensional coordinate system, and the three-dimensional coordinate system is constructed; wherein the X axis, the Y axis and the Z axis respectively represent the length, the width and the height of the carbon nanotube, and recording initial coordinates. By using the three-dimensional AI virtual platform and the real-time data acquisition technology, the environment change in the growth process of the carbon nanotubes can be accurately captured, and the environment change can be quickly coped with during actual control by combining the growth data and dynamically adjusting the environment parameters in the growth process; and unstable growth or deviation caused by incapability of timely adjustment in a traditional method is avoided.

The invention discloses a cement-based aerogel heat preservation and heat insulation coating material for concrete and a spraying construction process of the cement-based aerogel heat preservation and heat insulation coating material, and belongs to the technical field of concrete materials. The coating material is prepared from powder, composite emulsion and water, and the powder is prepared by mixing superfine sand, cement, modified silicon dioxide-carbon nanotube composite aerogel powder, hollow glass beads, nanofibers, graphene nanosheets, an ultraviolet light absorber, a water reducing agent and a defoaming agent. The composite emulsion is composed of an acrylate copolymer emulsion, a polyvinyl acetate-ethylene emulsion, a temperature-sensitive polymer emulsion and a coalescing agent. Based on the multi-stage pore network and multi-component emulsion optimization design and multi-component synergistic effect, the material has good fluidity after being mixed, and has low heat conductivity coefficient, high strength and high toughness after being hardened; the construction technology of high-pressure water flushing and layered spraying is provided, and the method has the advantages of being efficient in construction, stable in quality and the like and can be applied to heat preservation and heat insulation of a concrete structure in a severe environment.

The invention relates to the technical field of polymeric membrane materials, and particularly discloses an antistatic polyethylene composite membrane and a preparation method thereof. Comprising the following raw materials in parts by weight: 100 parts of low-density polyethylene, 5-9 parts of high-density polyethylene, 10-20 parts of maleic anhydride grafted polyethylene, 8-15 parts of a polyvinyl alcohol modified material, 3-5 parts of antistatic modified carbon black, 0.5-1 part of an antioxidant and 1-2 parts of a dispersing agent, the polyethylene composite film has excellent dispersibility, can effectively enhance the mechanical properties of the polyethylene composite film through the synergistic effect of physical filling and chemical grafting, forms a layer of conductive network structure, namely a conductive film, on the surface of the material through the combined effect of the polyethylene composite film and the antistatic agent, prevents the generation and accumulation of static electricity, and has good compatibility among the raw materials. And the material has excellent mechanical property and antistatic property.

The invention discloses a preparation method of porous carbon, the porous carbon, a negative electrode material and a secondary battery, the preparation method of the porous carbon comprises the following steps: granulation: drying and granulating a phenolic resin microsphere suspension to obtain powder; nano carbon nanotubes are dispersed in the phenolic resin microspheres; and carbonization: sequentially carrying out secondary curing, pre-oxidation and carbonization on the powder to obtain the porous carbon. According to the preparation method, the porous carbon is prepared by adopting the nanoscale carbon nanotubes, firstly, the conductivity of the porous carbon is favorably improved due to the good conductivity of the carbon nanotubes, and meanwhile, the nanoscale carbon nanotubes are utilized, so that the carbon nanotubes can be more sufficiently dispersed, and the effect of improving the conductivity of the porous carbon by the carbon nanotubes is more favorably exerted; secondly, the tin or germanium element doped into the negative electrode material assists lithium ion deintercalation by reducing lithium ion transition energy barriers, so that the first effect is improved.

The invention relates to a shielding material for a high-voltage cable, in particular to a semiconductor shielding material, a semiconductor shielding layer and a preparation method of the semiconductor shielding layer. According to the invention, a certain amount of modified carbon nanotubes are added on the basis of the raw materials of the existing polymer semiconductor shielding layer added with carbon black, and the modified carbon nanotubes are used for replacing part of carbon black, so that the polymer semiconductor shielding layer with good conductivity and high interface smoothness is prepared. The surface of the modified carbon nanotube is grafted with organic silicon and a polar ethylene polymer, so that the dispersity of the modified carbon nanotube in a polymer semiconductor shielding material system and the compatibility of the modified carbon nanotube with the resin surface are improved; the viscosity of a polymer semiconductor shielding material system under high shear strength is greatly reduced, so that the flowability of the system is greatly improved; the semi-conductive shielding material which is suitable for HV and EHV cables and has super smoothness and strong conductivity is obtained.

The invention relates to a cool master batch and a preparation method thereof, a cool polyester fiber and a cool polyester fiber fabric, the cool master batch is prepared from the following components in parts by mass: 70-90 parts of polyester and 10-30 parts of a cool agent, and the cool agent is prepared by hybridizing boron nitride and a carbon material according to a mass ratio of (98-99.9): (0.1-1) to obtain carbon hybridized boron nitride and adding a modifier for modification. According to the cool master batch, boron nitride is hybridized by adopting a small amount of carbon materials such as graphene and carbon nanotubes, so that the heat conductivity of the boron nitride material is improved, and meanwhile, the absorption of visible light, near-infrared rays and even ultraviolet rays by the graphene and the carbon nanotubes is eliminated, namely, the light absorption and heating effects are achieved; meanwhile, graphene and a carbon nano tube layer are inserted into boron nitride through ultrasonic hybridization, and then grinding is performed until the particle size is proper, so that compared with a processing mode of directly adding a dispersing agent, the boron nitride has a better dispersing effect and a more perfect heat-conducting network, and the dispersing effect of the cooling agent in the cooling master batch and the fiber is greatly improved.

The invention relates to the technical field of woven ceramic materials, in particular to a high-toughness woven ceramic material and a preparation method thereof, and the high-toughness woven ceramic material comprises the following raw materials in parts by weight: 30-40 parts of diopside, 20-30 parts of quartz, 10-15 parts of silicon carbide, 7-11 parts of boron nitride, 6-10 parts of a modified carbon nanotube reblended admixture, 5-7 parts of an intercalated synergistic supplement, 4-6 parts of aluminum oxide, 10-15 parts of water and 3-5 parts of a sodium dodecyl benzene sulfonate solution. According to the high-toughness woven ceramic material, the diopside is matched with the quartz, the silicon carbide, the boron nitride and the aluminum oxide raw materials, the blending and matching effects of the raw materials are optimized by improving the interfacial activity of the sodium dodecyl benzene sulfonate solution, and meanwhile, the added modified carbon nanotube reblended admixture and the intercalated synergistic supplement are used for carrying out coordination and synergistic effects, so that the high-toughness woven ceramic material is prepared. The durable usability of the product is enhanced, the fracture toughness of the product is excellent, the scrubbing-resistant and corrosion-resistant stability effects are remarkable, and the performance improvement effect of the product is remarkable.

The invention relates to the technical field of cables, and provides a fireproof flame-retardant 10kV power cable and a preparation method thereof. The fire-resistant flame-retardant 10kV power cable comprises a conductor and a fire-resistant flame-retardant layer, the fireproof flame-retardant layer is prepared from the following raw materials in parts by weight: 35 to 45 parts of linear low-density polyethylene, 40 to 50 parts of ethylene-vinyl acetate copolymer, 25 to 30 parts of modified aluminum hydroxide, 5 to 8 parts of polyethylene grafted maleic anhydride, 10 to 12 parts of phosphate modified halloysite nanotube, 5 to 8 parts of ZIF-8 loaded zinc borate core-shell particles, 15 to 20 parts of magnesium hydroxide and 2 to 3 parts of silane coupling agent. 0.5 to 1 part of antioxidant, 0.5 to 1 part of calcium stearate and 1 to 1.5 parts of polyethylene wax. According to the cable prepared in the invention, the situation that a conductor is exposed and the fire resistance is lost due to cracking and falling under long-time high-temperature baking is avoided; the continuous effectiveness of the flame retardant at high temperature is improved.

The invention discloses a method and equipment for rapidly and continuously preparing carbon nano tubes with adjustable tube diameters, which are used for continuously and rapidly preparing carbon nano tubes with different tube diameters and at least comprise a catalyst precursor atomizing chamber, a plasma device, a carbon nano tube preparation reactor, a collector and a tail gas treatment device. A catalyst precursor solution enters the atomizing chamber through the injection pump to be atomized, atomized mist enters the plasma treatment device and then enters a reaction from a sample inlet in the upper portion of the reactor, after the reaction in the reactor is completed for a short time, the carbon nanotubes are collected from a collecting device on the lower portion of the reactor, and tail gas can be returned to the reactor after being filtered by the filter. The tail gas can be repeatedly used; and the continuous preparation of the carbon nano tubes with different tube diameters can be realized.

The invention discloses a whisker carbon nanotube doped sulfonated polyetheretherketone water lubricated bearing material and a preparation method, and belongs to the technical field of high polymer materials, and the preparation method comprises the steps of dispersion of whisker carbon nanotubes, doping of the whisker carbon nanotubes, carbon fibers and graphite, cold press molding, sintering and the like. Hydrophilic sulfonic acid groups and whisker carbon nanotubes with branched structures are introduced into the sulfonated polyether-ether-ketone material, so that the sulfonated polyether-ether-ketone material effectively adsorbs hydrated cations in seawater, a hydrated lubricating layer is formed on the surface of the material, and interfaces of graphite, carbon fibers and polymers doped in the material are bridged and toughened. Besides, the whisker carbon nanotubes are dispersed by means of an alkylbenzene sulfonate dispersant, so that sulfonic acid groups can interact with the whisker carbon nanotube surface dispersant, the binding property of the polyether-ether-ketone material and the whisker carbon nanotubes is enhanced, and the surface strength of the material can be improved. Therefore, the problems that an existing polyether-ether-ketone composite material is poor in bearing capacity and serious in abrasion at a low rotating speed are solved.

The invention provides a carbon nanotube / polyvinyl alcohol hydrogel and a preparation method and application thereof, and belongs to the technical field of composite materials and flexible electron cross materials. Cellulose nanofibers and multi-walled carbon nanotubes are dispersed in deionized water to obtain dispersion liquid; uniformly mixing a polyvinyl alcohol solution and the dispersion liquid to obtain a mixed solution; carrying out oriented freezing forming on the mixed solution, and then freeze-drying the mixed solution to obtain an aerogel sample; performing hot pressing on the aerogel sample to obtain a thin film material; and swelling and balancing the film material in deionized water to obtain the carbon nanotube / polyvinyl alcohol hydrogel. According to the invention, collaborative optimization of conductive network continuity, interface bonding strength and energy dissipation capability is realized, so that high conductivity, high stress and obdurability are considered, and the material is endowed with multi-dimensional strain sensing capability and signal stability; and a new idea is provided for realizing effective balance between high conductivity and excellent mechanical properties of the hydrogel material.

The invention relates to the technical field of nylon 6, and discloses a carbon nanotube grafted ABS modified nylon 6 composite material, acylating chlorinated carbon nanotubes and lysine are subjected to an amidation reaction, double bonds on ABS and double bonds on maleic anhydride are combined, anhydride modified ABS and amino modified carbon nanotubes are subjected to a ring-opening reaction, and the carbon nanotube grafted ABS modified nylon 6 composite material is obtained. The carbon nanotubes are grafted to the ABS, agglomeration of the carbon nanotubes is avoided, the carbon nanotubes can form a uniform network structure under the action of external force, a large amount of external force is absorbed, the toughness of a matrix is improved, a large amount of carboxyl introduced to the surface of the ABS plastic and amide groups in the nylon 6 matrix are subjected to hydrogen-bond interaction, a three-dimensional hydrogen-bond network is formed, and the toughness of the matrix is improved. According to the present invention, the compatibility and the interfacial force between the nylon 6 and the carbon nano-tube grafted ABS are improved, such that the nylon 6 and the carbon nano-tube grafted ABS can be uniformly distributed so as to form the sea island structure, and can buffer more stress effects under the action of the external force, such that the obtained composite material has excellent toughness.

The invention discloses a polypyrrole / cobalt / nitrogen-doped carbon composite material with a coaxial hollow structure and a preparation method thereof, and belongs to the technical field of advanced functional composite materials. The method comprises the following steps: firstly, synthesizing a hollow polypyrrole nanotube by a soft template method; secondly, cobalt / nitrogen-doped carbon is synthesized by adopting a template guiding method; and finally, secondarily coating the outer surface of the cobalt / nitrogen-doped carbon with a polypyrrole layer by adopting an in-situ oxidative polymerization method to construct the polypyrrole / cobalt / nitrogen-doped carbon composite material with a coaxial hollow heterostructure, and the polypyrrole / cobalt / nitrogen-doped carbon composite material has a coaxial sandwich structure: the inner core is a nitrogen-doped carbon hollow tube, the middle layer is a nitrogen-doped porous carbon matrix embedded with cobalt nanoparticles, and the outer surface of the cobalt / nitrogen-doped carbon composite material is a porous carbon matrix embedded with cobalt nanoparticles. And the outer layer is a conductive polypyrrole coating layer. The preparation method provided by the invention can successfully realize in-situ confinement growth and stable combination of ZIF-67, and has the advantages of high repetition rate, high yield and simple method; by adjusting the proportion of polypyrrole in the composite material, good impedance matching and large dielectric loss can be realized, and excellent electromagnetic wave absorption performance can be obtained.

The invention relates to the technical field of high polymer materials, and discloses a PPE material based on carbon nanotubes and a preparation method thereof. The PPE material prepared by the invention is prepared from the following raw materials in parts by weight: 50-70 parts of polyphenyl ether resin, 8-15 parts of high impact polystyrene, 8-12 parts of modified carbon nanotubes, 5-9 parts of a modified flame retardant, 1-2 parts of a compatilizer, 0.5-1.5 parts of an antioxidant and 0.5-2 parts of a lubricant, the material is an antistatic and flame-retardant material based on carbon nanotubes. Wherein the modified carbon nanotubes can improve the conductivity of the matrix so as to improve the antistatic performance, and the modified flame retardant can have a synergistic effect with phosphate groups in the modified carbon nanotubes so as to significantly improve the flame retardant performance of the matrix.

The invention relates to a method for preparing a carbon nanotube reinforced copper-silver-based electrical contact composite material based on a liquid phase atomization method, and belongs to the technical field of electrical contact preparation. The preparation method comprises the following steps: carrying out hot pressed sintering on mixed powder of reinforcement powder, copper powder and silver powder, solidifying the powder to form an Ag-coated CNTs / Cu-Ag composite material block, and then preparing the Ag-coated CNTs reinforced Cu-Ag-based electrical contact composite material through a process route of solid solution, extrusion and aging. The preparation method disclosed by the invention is simple to operate and stable in preparation process, and the mechanical and electrical properties of the prepared composite material can respectively reach 157HV and 103% IACS (International Annealed Copper Standard) and above; according to the method, ablation and damage of the surface of the electrical contact in the working process are relieved, the viscosity of a molten pool is increased, the contact resistance in the electrical contact process can be reduced, the current concentration phenomenon and the temperature rise effect at a contact point can be relieved, the mass loss of an electrical contact material is reduced, the maintenance cost is reduced, and the method has good application prospects in the field of electrical contact materials.

The invention discloses a self-repairing high-energy-storage ice-snow-resistant double-layer composite microcapsule suitable for an asphalt surface layer and a preparation method and application thereof, and relates to a microcapsule preparation method and application thereof. The invention aims to solve the technical problems of poor core material release and self-healing effects, unstable shell wall material, low heat conductivity, easy leakage and single function of the existing self-repairing microcapsule for the asphalt pavement. The double-layer composite microcapsule is sequentially composed of an inner phase change microcapsule core, an inner phase change microcapsule shell, an outer self-repairing microcapsule core and an outer self-repairing microcapsule shell from inside to outside. Preparing an internal phase change microcapsule core from n-caprylic acid and tetradecane; preparing an internal phase change microcapsule shell by using a carbon nano tube and a double polymer; preparing an external self-repairing microcapsule core from bio-oil and a carbon nanotube; the outer self-repairing microcapsule shell is prepared from the carbon nano tube and the double polymer. Compared with a common asphalt pavement, the healing index of the surface layer of the asphalt pavement prepared from the double-layer composite microcapsule is improved by 8.1%-26.3%. The method can be used in highway fields.

The present application belongs to the field of polymer material technology, and in particular, relates to a polyimide composite material, a preparation method thereof, and an application thereof. The preparation method of the polyimide composite material comprises the steps of: preparing a polyamic acid slurry from a diamine monomer, a dianhydride monomer, and an organic solvent; preparing a mixed slurry from the polyamic acid slurry and a nanomaterial, and then performing a spinning imidization treatment to obtain a polyimide composite material; wherein the nanomaterial comprises at least one of nano silicon carbide, aluminum nitride, carbon nanotubes, graphene, and nano silicon dioxide. By blending polyimide with other nanomaterials having high thermal conductivity to improve its thermal conductivity, the thermal conductivity of the polyimide composite material is optimized and improved, and its heat dissipation capacity in a high temperature working environment is enhanced, while having high tensile strength and thermal conductivity. The service life of the polyimide composite material is extended, and its application range can be further expanded, such as in the back panel assembly of a smartphone.

The invention discloses a lithium iron phosphate carbon nanotube composite material and a preparation method thereof, and belongs to the technical field of battery materials. The polydopamine is used as a carbon source to coat the lithium iron phosphate, so that the direct contact between the lithium iron phosphate and the electrolyte is avoided; meanwhile, the compatibility of the carbon nanotube composite material and the lithium iron phosphate is enhanced due to the strong adhesion, so that the carbon nanotube composite material is favorably adsorbed on the lithium iron phosphate to be sintered; a carbon coating layer formed by polydopamine and the carbon nanotubes are beneficial to permeation of an electrolyte and exposure of surface active sites, and metal ions are introduced into the carbon nanotubes of the carbon nanotube composite material, so that the electrochemical performance of the material is improved, and meanwhile, the carbon nanotubes are supported; the condition that the cyclicity of the material is reduced due to collapse of the carbon nano tube in the reaction process is prevented; cobalt is introduced outside the carbon nano tube, so that the energy density of the battery can be improved, the structures of the carbon nano tube and the positive electrode material can be stabilized, and the degradation of the material is reduced.

The invention provides conductive paste, a solar cell, a preparation method of the solar cell and a photovoltaic module. The conductive paste comprises the following components in parts by weight: 70-85 parts of silver powder, 3-8 parts of glass powder, 0.1-2 parts of an additive and 12-25 parts of an organic carrier, wherein the silver powder comprises spherical silver powder and flaky silver powder; the glass powder is prepared from the following components in parts by weight: 65 to 75 parts of Bi2O3, 18 to 25 parts of TeO2 and 8 to 12 parts of V2O5; the additive is a carbon material and / or conductive metal oxide nanoparticles; the organic carrier comprises an infrared absorbing material; the infrared absorption material is selected from any one or more of copper phthalocyanine, a polyaniline-carbon nanotube compound and a tungsten oxide nanowire. The conductive paste can improve the conductivity of the conductive paste and improve the efficiency of the conductive paste in a laser sintering process, so that the contact resistivity is reduced, and the photoelectric conversion efficiency of a photovoltaic solar cell is improved.

The invention belongs to the technical field of protective coatings, and discloses an anti-corrosion, wear-resistant and high-temperature-resistant coating as well as a preparation method and application thereof. The coating comprises a primer, a middle transition layer and a finish; the raw materials of the primer comprise a primer material and a primer curing agent component; the primer material comprises modified epoxy phenolic resin, a primer functional filler, a first mixed solvent, a high-temperature-resistant coupling agent and an anti-settling agent; the raw materials of the middle transition layer comprise a middle transition layer material and a middle curing agent component; the materials of the middle transition layer comprise polyimide modified epoxy resin, a wear-resistant filler, a reactive diluent, a carbon nanotube, a first dispersant and a compatilizer; the raw materials of the finishing paint comprise a finishing paint material and a finishing paint curing agent component; the finishing paint material comprises organic silicon modified fluorocarbon resin, finishing paint functional filler, a second mixed solvent, a second dispersing agent and a flatting agent. According to the invention, a resin-based composite coating system is synergistically designed through multi-phase materials, so that optimal balance of corrosion resistance, wear resistance, toughness and high temperature resistance of the coating is realized.

The invention discloses a high-thermal-conductivity carbon skeleton resin-based composite material and a preparation method thereof, and belongs to the technical field of thermal conductive composite materials. The preparation method comprises the following steps: firstly, preparing a fibrofelt preform from chopped mesophase pitch-based carbon fibers, and growing carbon nanotubes on the carbon fibers in situ by adopting a chemical vapor deposition process; depositing a layer of pyrolytic carbon through a chemical vapor infiltration process, and jointly connecting the carbon nanotubes / pyrolytic carbon with the chopped carbon fibers in the preform to prepare a porous hybrid network structure; carrying out graphitization treatment on the network structure to obtain a high-thermal-conductivity hybrid carbon skeleton composed of carbon fibers, carbon nanotubes and pyrolytic carbon; and impregnating polymer resin into the hybrid carbon skeleton structure through an impregnation process, and curing to obtain the carbon skeleton resin-based composite material. According to the prepared carbon skeleton resin-based composite material, when the volume fraction of the carbon skeleton accounts for 19.2 vol%, the thermal conductivity in the thickness direction of the composite material reaches 20.9 W / m.K which is 99 times of the thermal conductivity of pure epoxy resin, and the carbon skeleton resin-based composite material can be used as a novel thermal management material.

The invention belongs to the field of lithium ion batteries, and discloses a carbon-coated nanotube lithium titanate / carbon composite negative electrode material, a preparation method and a lithium ion battery. The lithium titanate / carbon composite negative electrode material is of a unique nanotube structure, the structure is composed of nanoparticles which are connected with one another and are covered with carbon layers on the surfaces, and certain gaps are formed among the nanoparticles. The preparation method comprises the following steps: dissolving a carbon source and hexadecyl trimethyl ammonium bromide in an organic solvent, then respectively adding the carbon source and a lithium source according to the proportion, and carrying out solvothermal reaction after fully stirring; and washing, drying and calcining the precipitate obtained after the reaction at high temperature to obtain the lithium titanate / carbon compound. Benefited from the synergistic interaction mechanism of the lithium titanate and the carbon material, the electron / ion transmission kinetics in the charge-discharge process of the lithium titanate / carbon compound is greatly improved, so that the lithium titanate / carbon compound has excellent rate capability and cycle performance. The method has the characteristics of simple process, environment friendliness, low cost, high efficiency and the like.

The invention provides a perfluoroether rubber sealing element and a preparation method thereof, and the preparation method comprises the following steps: taking tetrafluoroethylene and perfluoroalkyl vinyl ether as comonomers, and carrying out emulsion polymerization under the condition of a vulcanization point monomer and a chain transfer agent to obtain raw perfluoroether rubber; the preparation method comprises the following steps: mixing the raw perfluoroether rubber, the carboxyl fluorinated modified carbon nanotubes, a filler, a vulcanizing agent and an accelerant, and performing first-stage vulcanization and second-stage vulcanization to obtain the perfluoroether rubber sealing element. According to the perfluoroether rubber sealing element and the preparation method thereof provided by the invention, the compressive deformation resistance of the perfluoroether rubber sealing element is improved by adding the carboxyl fluorinated modified carbon nanotubes, so that the sealing element is ensured to meet the sealing requirement of semiconductor equipment.

The invention provides a quick-charge and quick-discharge type lithium battery and a preparation method thereof, and belongs to the technical field of lithium battery preparation. The preparation process comprises the following steps: preparing a fluorinated carbon nanotube based on biomass carbon; preparing a positive electrode plate; preparing the dendritic mesoporous silicon dioxide nano particles; preparing a cerium oxide-loaded two-dimensional hierarchical porous composite material; preparing a negative electrode plate; and assembling the lithium battery. According to the preparation method, the eutectic and the carbon fluoride nanotubes are added in the preparation of the positive electrode plate, and the cerium oxide-loaded two-dimensional hierarchical porous composite material and the carbon fluoride nanotubes are added in the preparation of the negative electrode plate, so that the prepared positive electrode plate and the prepared negative electrode plate have relatively high conductivity; and moreover, the ion transmission efficiency is improved, the rapid ion transmission is beneficial to reducing the polarization phenomenon of the battery, improving the charging and discharging rate and the power performance of the battery, enhancing the structural stability of the electrode, improving the performance and the safety of the battery, and being more beneficial to rapid charging and rapid discharging.

A pellicle for an EUV photo mask includes a first layer, a second layer, and a main membrane disposed between the first layer and second layer. The main membrane includes a plurality of co-axial nanotubes, each of which includes an inner tube and one or more outer tubes surrounding the inner tube, and two of the inner tube and one or more outer tubes are made of different materials from each other.

The invention belongs to the field of flow energy storage battery materials, and particularly relates to a multi-dimensional conductive material, a preparation method thereof and application of the multi-dimensional conductive material in an all-vanadium flow battery. Graphite and multi-walled carbon nanotubes are bonded together by adopting a biomass precursor, a carbon base of biomass is converted into graphitized carbon nanotubes through step-by-step pyrolysis, amorphous carbon in the graphite and the original carbon nanotubes is further graphitized, and finally the multi-dimensional conductive material with the carbon nanotubes inserted on a graphite matrix is formed. The multidimensional characteristic of the surface of the multidimensional conductive material is beneficial to formation of a longitudinal conductive path of the bipolar plate and reduction of vertical body resistance of the bipolar plate, and is also beneficial to wetting of epoxy resin among conductive particles and mechanical interlocking of molecular chains of the epoxy resin, so that the mechanical strength of the bipolar plate is improved, the use performance of the bipolar plate is effectively enhanced, and the service life of the bipolar plate is prolonged. The requirement of long-time operation of the flow battery is met, the material cost of the flow battery is relatively reduced, the industrialization of the bipolar plate is powerfully promoted, and the application value is very good.

The invention discloses a biochar / carbon nanotube / myristic acid composite phase change material as well as a preparation method and application thereof, and belongs to the technical field of heat storage. The meat biochar / carbon nanotube / myristic acid composite phase change material is prepared by adopting a vacuum impregnation method. The original biochar is modified by KOH, so that the specific surface area and pore volume of a sample are increased, the specific surface area of the modified KBC3 reaches 813.56 m < 2 > / g, and the loading capacity of the KOH modified biochar on MA is increased to 63%. The result shows that the MA sample is successfully loaded into the porous material, and the structure is kept intact. In order to further improve the loading rate and the leakage resistance of the phase change material, carbon nanotubes are doped in the KBC / MA phase change material, and when the loading rate of MA is improved to 75%, KBC1.5 / MA severely leaks in a shape stability performance experiment, and the mass loss rate reaches 8.5%. And KBC1.5 / CNT1 / MA only has little leakage in the thermal stability test process, so that the leakage resistance of the composite phase change material is greatly enhanced. Through BC modification and CNTs introduction, the heat conduction capability and the photothermal conversion capability of the composite PCMs are greatly improved.

The invention discloses a titanium dioxide nanotube confinement catalyst for methane dry reforming and a preparation method and application thereof, a transition metal element is used as an active phase, the titanium dioxide nanotube confinement transition metal element catalyst is modified by a rare earth metal element, and the weight of the methane dry reforming catalyst is used as a reference. The content of the transition element is 1-10%, preferably 1-5%, and the content of the rare earth element is 1-5%, so that the problems of activity reduction and poor stability caused by easy generation of carbon deposition of the methane dry reforming catalyst in the prior art are solved.