55 results about "Carbon nanotube" patented technology

Process, apparatus, compositions and application modes are provided that relate to nanofiber spinning without the use of superacids in the spinning solution. The methods employ either acids or bases for a flocculation solution. The advances disclosed therein enable the use of nanofibers, including carbon nanotubes, for a variety of applications including, but not limited to, electromechanical actuators, supercapacitors, electronic textiles, and in devices for electrical energy harvesting.

The invention provides a high-tenacity polycrystalline composite material. The high-tenacity polycrystalline composite material particularly comprises, by mass, 72%-92% of polycrystalline super-hard phase, 7.5%-25% of binding agents and 0.5%-15% of toughening agents. The toughening agents are one of aluminum oxide whiskers, silicon nitride whiskers, silicon carbide whiskers, carbon nano tubes and graphene or the combination of several of the aluminum oxide whiskers, the silicon nitride whiskers, the silicon carbide whiskers, the carbon nano tubes and the graphene. The invention further provides a high-tenacity polycrystalline blade prepared from the high-tenacity polycrystalline composite material and a preparation method of the high-tenacity polycrystalline blade. The preparation method comprises the steps of isostatic forming, vacuum heat treatment activation, and high-temperature and high-pressure sintering. The high-tenacity polycrystalline blade has good tenacity and cutting performance, and the preparation technique is simple and easy to implement.

A method for manufacturing high-quality single-walled carbon nanotubes on a glass substrate at relatively low temperatures includes: depositing a buffer layer on a glass substrate; depositing a catalytic metal on the buffer layer; placing the glass substrate having the catalytic metal formed thereon in a vacuum chamber and generating H₂O plasma inside the vacuum chamber; and supplying a source gas into the vacuum chamber and growing a carbon nanotube on the glass substrate.

The invention belongs to the technical field of a refractory castable, and particularly relates to a castable for a blast-furnace tapping channel and a preparation method thereof. The castable comprises the following components: 55-80wt% of fused brown corundum, 8-21wt% of silicon carbide, 0.01-5wt% of carbon source, 2-8wt% of alpha-alumina micro powder, 1-7wt% of fused white corundum, 0.5-5wt% of silica powder, 1-5wt% of calcium aluminate cement, 0.3-4wt% of elemental silicon powder, 0.01-0.4wt% of water reducing agent, 0-0.2wt% of organic fibers and 0-0.2wt% of aluminum powder. The preparation method comprises the steps of dry-blending the components for 10-180 seconds, additionally adding water accounting for 4-6wt% of the raw materials, and stirring for 1-8 minutes so as to obtain the castable. Carbon nanotubes are introduced to the castable for the tapping channel so as to partially or totally replace spherical asphalt and be uniformly distributed in the castable, and can be filled into tiny gaps so as to improve the compactness of the castable, so that the anti-erosion and anti-scouring properties of the castable are improved, toxic smog formed in the process of baking the spherical asphalt is reduced, and the body injury of workers and the environmental pollution caused by the toxic smog are reduced; the castable has the characteristics of excellent properties, long service life and environmental friendliness.

The invention provides a cathode for a metal and carbon nano tube or carbon fiber film emitting array and a manufacturing method thereof in the microelectronic technical field. The cathode structure comprises a substrate, a bottom electrode, a resistive layer, an emitter, a knee wall, an insulating layer, a grid electrode and a forming electrode, wherein the bottom electrode layer is firstly formed on the substrate; the resistive layer is arranged on the surface of the bottom electrode layer; a composite film of metal and carbon nano tube or carbon fiber is deposited on the resistive layer as the emitter; the bottom electrode has a patterned structure on a plane; the clearance position of the bottom electrode is provided with a knee wall structure; the insulating layer is arranged on the insulating layer, while a grid electrode structure is suspended on the insulating layer; the forming electrode is arranged on the upmost layer of the whole structure; and the structure layers are all subject to patterning treatment. The cathode for the metal and carbon nano tube or carbon fiber film emitting array and a manufacturing method thereof manufacture a pattern structure by micro machining method and film technology, can realize a field emitting cathode array with complicated structure, and can be integrated with other micro machining processes by the composite plating method. The device preparing device is simple and easy, and can reduce manufacturing cost.

A novel carbon nanotube powder containing carbon nanotubes which have a roll-like structure, also novel carbon nanotubes having a roll-like structure, novel processes for the production of the carbon nanotube powders and of the carbon nanotubes, and their use as an additive or substrate for various applications are described.

The present invention provides a photocatalyst composite structure and a preparation method thereof. The photocatalyst composite structure has backbone-branch structural feature; the graphite type carbon nitride (g-C3N4) is the backbone, and carbon nanotubes(CNTs) grown in situ on the backbone chemical through vapor deposition (CVD) are the branches; and the nano photocatalyst coats on the entire backbone-branch complex structure surface. The invention has the advantages that the photocatalyst composite structure can degrade organic contaminants and realize photocatalytic water decomposition for hydrogen production under ultraviolet and visible light; in addition, the backbone-branch composite structure has large specific surface area, and can fully contact with organic pollutants and electrolyte solution to improve the photocatalytic efficiency.

The invention provides an alloying component and a preparation method thereof. The alloying component takes high-entropy alloy as a matrix, and uses a carbon nano tube and rare earth nano particles asreinforcements, wherein the expression of the atomic percent of the high-entropy alloy is LxMyNz(Fe2/3Nb1/6Ta1/6)100-x-y-z; L comprises at least one of B, Mg, Al, Si, Sr, Ga, Ge, Sn, Sb and Bi; M comprises at least one of Cu, Co, Cr, Ni, Mn, Ag, Zn, V, Ti, Zr, Mo, Hf and W; N comprises at least one of Er, Y, Sc, Nd, Dy, Tm and Gd; and x is larger than or equal to 0 and smaller than 100, y is larger than or equal to 0 and smaller than 45, z is larger than or equal to 0 and smaller than 10, and the sum of x+y+z is larger than or equal to 0 and smaller than 100. The invention can provide the alloying component which refines grains to enables material compositions to be distributed more uniformly, and improves the grain boundary performance and the grain boundary corrosion resistance and thepreparation method of the alloying component.

The invention discloses a modifying method of carbon nanometer pipe, which comprises the following steps: blending macromolecular solution of Poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT-PSS) and carbon nanometer pipe; heating to 30-60 Deg C; vibrating through ultrasound for 1-24h; making carbon nanometer surface modified by PEDOT-PSS; improving dissolving property obviously.

The invention discloses a preparation method of a carbon nano-tube/amorphous carbon/epoxy resin composite material, belonging to the field of synthesis and application of carbon nano composite materials. The method comprises the steps of firstly, preparing carbon nano-tube sponge; secondly, preparing a carbon nano-tube/amorphous carbon composite material; finally, preparing the carbon nano-tube/amorphous carbon/epoxy resin composite material. A carbon nano-tube/amorphous carbon aerogel is prepared by using a chemical vapor deposition method, and epoxy resin is directly poured into pores of the carbon nano-tube/amorphous carbon aerogel by using the porosity of the carbon nano-tube/amorphous carbon aerogel, thus achieving the effect of enhancing the epoxy resin and directly obtaining the carbon nano-tube/amorphous carbon/epoxy resin composite material with a uniform structure at the same time. The strength and modulus of the prepared carbon nano-tube/amorphous carbon/epoxy resin composite material disclosed by the invention are improved greatly as compared with those of pure epoxy resin and carbon nano-tube/epoxy resin.

The invention provides a method for removing phenol-based substances from water by using an iron-sulfur supported multi-walled carbon nano-tube reinforced persulfate, and relates to a water treatment method. A purpose of the present invention is to solve the technical defects of high cost, poor removal effect and the like of the existing method for removing phenol-based substances from water. The method comprises: 1, mixing a persulfate and pre-treated water; 2, preparing iron-sulfur supported dual-phase composite multi-walled carbon nano-tubes; 3, pouring the iron-sulfur supported dual-phase composite multi-walled carbon nano-tubes; and 4, filtering the treated water so as to complete the method. With the method of the present invention, the removal rate of the phenol-based substances in the water can achieve 87-98%, and the residual phenol-based substance in the water can be removed.

The invention discloses a novel microchip laser supporting optical fiber output, which belongs to the fields of laser technology and non-linear optics. The novel microchip laser mainly comprises a laser diode pumping source, an optical fiber output system, an optical collimation system, a laser light gain medium and optical elements, wherein pump light enters the optical collimation system for collimating after passing through the optical fiber output system, and is focused onto the gain medium; the film-plated optical elements are arranged in front of and behind the gain medium; the gain medium and the film-plated optical elements in front of and behind the gain medium construct a laser resonant cavity with a sandwich structure; laser light generated by the laser resonant cavity returns along the incident direction of the pump light, passes through the optical collimation system once again, and is output through the optical fiber output system. The novel microchip laser has the characteristics that optical fiber output is performed during the use of an optical fiber pump without any additional output device in a sandwich microchip structure, and a fiber-core pump or a cladding pump can be adopted, so that the flexibility of a system is improved greatly; and meanwhile, the structure can also be applied to pulse modulation of materials such as semiconductor saturable absorbing mirrors, single-wall carbon nanotubes or graphene and the like, and stable pulse output is realized.

The invention discloses a method for preparing a Ni-P-CNT (Carbon nanotube) nano composite coating. The method comprises the following steps of: performing acid oxidation treatment on a carbon nano-tube (CNT) before coating, utilizing an ultrasonic dispersion technology and adding a proper amount of surfactant into a chemical plating solution, so that the CNT is uniformly dispersed in the chemical plating solution. A proper chemical plating solution formula is selected, a proper amount of surfactant is added, the coating solution is not decomposed and precipitated in the chemical plating process through an intermittent magnetic stirring method, the chemical and physical characteristics are stable and reliable, the nano composite coating which is high in hardness, wear resistance and corrosion resistance is prepared compared with the traditional Ni-P coating, and the problem that the CNT is dispersed is solved.

The invention relates to a novel separation membrane with high performance and a preparation method thereof. The membrane is prepared from high-flux directionally-arranged carbon nanotubes serving as a substrate, and a ZIF (Zeolitic Imidazolate Framework) type metal-organic framework material with high selectivity serving as a separation layer. The preparation method comprises the following steps: (1) preparing a directionally-arranged carbon nanotube substrate on a microfiltration membrane through a vacuum filtration method; (2) growing a ZIF type metal-organic framework material surface layer on the carbon nanotube substrate through an interface method. In conjunction with high transmission properties of inner channels and tube gaps of carbon nanotube material tubes and the three-dimensional micro-pore structure of the ZIF type metal-organic framework material, the prepared novel metal-organic framework material separation membrane based on the carbon nanotube substrate has high permeability and high selectivity in a membrane separation process. The novel separation membrane shows superior separating performance in a nano-filtration process, and a basis is laid for the design and preparation of a large-flow efficient separation membrane.

The invention discloses a flexible lithium-ion battery capable of working around the clock and a preparation method thereof. According to the battery, a membrane assembled by a stretched carbon nanotube macroscopic tube continuous body is taken as a current collector for positive and negative electrodes; and the membrane is subjected to porous treatment and electrolyte infiltration treatment in the membrane-forming process and an electrolyte can be stored into a carbon nanotube membrane as the current collector, so that the obtained battery still can normally work in harsh environments, such as extremely high temperature, extremely low temperature, vacuum and water. A battery main body comprises a positive electrode plate, a membrane and a negative electrode plate which are sequentially stacked. The invention further provides a preparation method of the battery. According to the flexible lithium-ion battery, the problem of a failure of an existing lithium-ion battery due to the fact that the current collector cannot store the electrolyte in the harsh environments can be effectively solved; the preparation process is in full integration with a production technology of an existing mainstream lithium-ion battery; mass production under existing production conditions is facilitated; and the flexible lithium-ion battery has very high practicability.

The invention relates to the field of functional conductive fibers, and discloses a water-based carbon nanotube dye, a composition thereof and a method for preparing a conductive fiber. The water-based carbon nanotube dye composition is characterized by containing waterborne resin, a carbon nanotube, an anionic dispersant and a nonionic wetting dispersant. The water-based carbon nanotube dye is prepared from the composition. The conductive fiber is prepared from the water-based carbon nanotube dye. The conductive fiber obtained by the method is high in electrical conductivity, resistance stability and color fastness.

The invention provides a two-section system and method for coproducing coal-base graphite and carbon nano-tubes. The system comprises a graphitization module and a carbon nano-tube generation module,wherein the graphitization module comprises a graphitization reactor, a volatile component outlet is formed in the top wall of the graphitization reactor, and a carrier gas inlet is formed in the bottom wall of the graphitization reactor; the carbon nano-tube generation module comprises a reforming reactor, a waste gas outlet is formed in the top wall of the reforming reactor, and a volatile component inlet and a water vapor inlet are formed in the bottom wall of the reforming reactor; upper and lower sieve plates are arranged in the graphitization reactor and the reforming reactor, respectively, and feeding holes and discharging holes are formed in the side walls of the graphitization reactor and the reforming reactor; and the volatile component outlet and the volatile component inlet arecommunicated through a middle pipeline. The system has the beneficial effects that aiming at the deficiencies that the energy consumption of high-temperature graphitization of coal is high and volatile components in the graphitization process are not effectively utilized in the prior art, a reaction for catalyzing graphitization and a reaction for catalyzing reforming to prepare carbon nano-tubesare effectively combined, so that the gradient utilization of coal resource is realized, and the high value-added product is obtained.

The invention discloses a graphene coated carbon-sulfur composite positive electrode, a preparation method thereof and a secondary aluminum battery. The graphene coated carbon-sulfur composite positive electrode is prepared by compounding a carbon nanotube sponge with elemental sulfur and then dipping the composite material in graphene slurry. The carbon nanotube sponge has a three-dimensional network structure and is capable of adsorbing active substances and lowering dissolution of sulfide by virtue of large specific surface area. A conductive network, formed among particles after the surface of the composite material is coated with graphene, is capable of lowering contact resistance generated by carbon nanotube sponge-sulfur surface insulativity, inhibiting the dissolution of a surface active substance, namely sulfur, of the carbon nanotube sponge, and improving the cycling performance of the composite positive electrode. The positive electrode prepared by the method is free of a conducting agent or a binding agent and is environmentally friendly and cheap. The secondary aluminum battery prepared by applying the composite positive electrode is excellent in cycling performance and has environment-friendly and safe effects.

The invention discloses a preparation method of a carbon-nanotube-modified polystyrene composite material. The carbon-nanotube-modified polystyrene composite material is mainly prepared from the following components in parts by mass: 100 parts of styrene, 5-20 parts of carbon nanotube, 0.05-0.2 part of initiator, 60-80 parts of concentrated sulfuric acid, 180-240 parts of concentrated nitric acid, 100-200 parts of deionized water, 0.1-0.5 part of potassium persulfate, 3-6 parts of sodium lauryl sulfate and 100-200 parts of 10% sodium hydroxide solution. The preparation method is simple and easy to operate; and the prepared composite material has the advantages of favorable carbon nanotube dispersion properties and excellent mechanical properties.

The invention relates to a manufacturing method of electron emitting member, a cold cathode field emission device and a cold cathode field emission device, comprising the steps of (a) forming, on a predetermined region of a cathode electrode 11 formed on a supporting member 10, a composite layer having a constitution in which carbon nanotube structures 20 are embedded in a matrix 21, and (b) allowing a peel-off layer 24 to adhere onto the surface of the composite layer 22 and then mechanically peeling off the peel-off layer 24, to obtain an electron emitting portion 15 in which the carbon nanotube structures 20 are embedded in the matrix 21 in a state where the top portion of each carbon nanotube structure 20 is projected.

The present invention provides a compound for target killing tumour cell, a method for preparing the same and appliance, which relates to nano-technology and life science field. The nanometer compound is composed of carbon nanotube less than 50nm -1mum, ricin protein A-chain, anti-HFR-2 targeting protein. The short carbon nanotube combines with ricin protein A-chain and anti-HFR-2 targeting protein respectively. The compound has high killing rate by acting on human breast cancer cell and normal cell. The preparing method is simple, and the prepared compound has better biocompatibility and better target for tumour cell, and provides new thinking for clinic research of target killing tumour cell.

The invention provides a full-frequency wave-absorbing high-temperature heat-insulating stealth integrated paint. The paint comprises: high temperature-resistant reinforced chopped fiber, pressure-resistant hollow microspheres, a wave-absorbing agent, resin and a solvent. According to the full-frequency wave-absorbing high-temperature heat-insulating stealth integrated paint, carbon nanotubes anda magnetic absorbent are effectively compounded and combined, so that the reflection and absorption performance of a coating can be improved. The paint coating has high-temperature resistance, heat insulation and full-frequency wave absorption, can be used on the outer surfaces of weaponry and aircrafts, achieves effective thermal protection on the weaponry and the aircrafts, and also has a full-frequency band stealth effect at the same time. The paint can be applied to various types of airplanes, missiles and the like which have requirements for high-temperature resistance, heat insulation and invisibility, and has important significance for improving the autonomous ability of national defense and military industry production in China and enhancing the comprehensive strength of China.

The invention belongs to the technical field of synthesis of battery materials, and particularly relates to a negative electrode material and a preparation method thereof and a secondary battery. According to the negative electrode material, graphite serves as a core structure, a silicon layer, a carbon coating layer and a carbon nanotube are sequentially arranged on the surface of the core structure in the direction away from the core structure, and the length-diameter ratio of the carbon nanotube is larger than 3000. According to the negative electrode material disclosed by the invention, the carbon nano tube with high length-diameter ratio is arranged at the outermost portion, so that the conductivity can be improved, and a cage structure can be formed during mixing and stirring to buffer the volume change of the silicon layer; and the negative electrode material disclosed by the invention has the advantages of high initial coulombic efficiency and specific capacity, low irreversible capacity and good cycling stability and conductivity.

The invention discloses a method for detecting trace hydroquinone by using a graphene/carbon nano tube modified electrode. The graphene/carbon nano tube modified electrode is a working electrode, and a method for detecting trace hydroquinone in water is established by means of different current catalytic strengths of the graphene/carbon nano tube modified electrode to hydroquinone with the concentration of respectively 0.6mu mol/L, 0.8mu mol/L, 2mu mol/L, 4mu mol/L, 6mu mol/L, 8mu mol/L, 20mu mol/L, 40mu mol/L and 60mu mol/L. The scanning potential is -0.2-0.6V, and the scanning speed is 100mV/s. In a 0.02mol/L phosphate buffered solution (PBS) with a pH value of 7.4, the concentration of the hydroquinone is within the range of 6*10<-7>-6*10<-5>mol/L, a favorable linear relation is formed between the concentration and the catalytic current strength on the surface of the electrode, and the detection limit is 2.13*10<-7>mol/L. The method is sensitive, good in selectivity, and more convenient and simpler in detection of low-concentration hydroquinone.

The invention belongs to the technical field of electrochemical materials, and particularly relates to a preparation method of an electromagnetic shielding heat dissipation film. The method comprisesthe following steps of obtaining carbon nanotube films and graphene films; after at least one layer of the carbon nanotube films and at least one layer of the graphene films are alternately laminated,performing hot pressing treatment in a protective gas atmosphere of 2,800-3,000 DEG C for 8-10 hours to obtain a laminated function layer of carbon nanotubes and graphene; obtaining a base layer, andattaching the laminated function layer to one side surface of the base layer by using an adhesive; and obtaining a heat conduction adhesive, and applying the heat conduction adhesive to the other side surface, away from the base layer, of the laminated function layer to form a heat conduction adhesive layer, and obtaining the electromagnetic shielding heat dissipation film. The preparation methodof the electromagnetic shielding heat dissipation film is simple in process, easy to operate and convenient for industrial production and application.