摘要:
A system that receives nanomaterials, forms nanofibrous materials therefrom, and collects these nanofibrous materials for subsequent applications. The system is coupled to a chamber that generates nanomaterials, typically carbon nanotubes produced from chemical vapor deposition, and includes a mechanism for spinning the nanotubes into yarns or tows. Alternatively, the system includes a mechanism for forming non-woven sheets from the nanotubes. The system also includes components for collecting the formed nanofibrous materials. Methods for forming and collecting the nanofibrous materials are also provided.
摘要:
The carbon nanofiber has a content of oxygen controlled in a range of 8% by mass to 20% by mass and excellent dispersibility in polar solvents by means of an oxidization treatment carried out on a raw material of the carbon nanofiber. The above-described oxidization treatment is preferably carried out at 100°C or higher using an mixed acid of nitric acid and sulfuric acid in which the nitric acid concentration is in a range of 10% by mass to 30% by mass. A carbon nanofiber dispersion liquid is obtained by dispersing the above-described carbon nanofiber in a polar solvent, and a carbon nanofiber composition contains the above-described dispersion liquid and a binder component.
摘要:
Provided are carbon fibers with low metal ion elution amount without subjecting to high-temperature heat treatment, in which the metal ion may be sometimes precipitated on an electrode of electrochemical devices such as batteries and capacitors to cause short-circuit. The carbon fibers comprises Fe, at least one catalyst metal selected from the group consisting of Mo and V, and a carrier; wherein the carbon fibers have an R value (ID/IG) as measured by Raman spectrometry of 0.5 to 2.0 and have an electrochemical metal elution amount of not more than 0.01 % by mass.
摘要:
A method for production of various morphologies of solid carbon product by reducing carbon oxides with a reducing agent in the presence of a catalyst. The carbon oxides are typically either carbon monoxide or carbon dioxide. The reducing agent is typically either a hydrocarbon gas or hydrogen. The desired morphology of the solid carbon product may be controlled by the specific catalysts, reaction conditions, and optional additives used in the reduction reaction. The resulting solid carbon products have many commercial applications.
摘要:
A method for manufacturing a plurality of nanostructures (101) on a substrate (102). The method comprises the steps of: depositing a bottom layer (103) on an upper surface of the substrate (102), the bottom layer (103) comprising grains having a first average grain size; depositing a catalyst layer (104) on an upper surface of the bottom layer (103), the catalyst layer (104) comprising grains having a second average grain size different from the first average grain size, thereby forming a stack of layers comprising the bottom layer (103) and the catalyst layer (104); heating the stack of layers to a temperature where nanostructures (101) can form; and providing a gas comprising a reactant such that the reactant comes into contact with the catalyst layer (104).
摘要:
A method of producing carbon fibers, in which the producing method comprises allowing a supported type catalyst and a carbon atom-containing compound to come in contact with each other in a heating zone, wherein the supported type catalyst is prepared by a method comprising impregnation of a powdery carrier with colloid containing catalyst to support particles of the catalyst on the powdery carrier having a specifically developed crystal plane such as a powdery carrier being 4 or more in the ratio (I 1 /I 2 ) of the intensity I 1 of the strongest peak to the intensity I 2 of the second strongest peak observed in X-ray diffraction, or a powdery carrier having the ratio (I 1 /I 2 ) of the intensity I 1 of the strongest peak to the intensity I 2 of the second strongest peak observed in X-ray diffraction of 1.5 times or more the ratio (I 1s /I 2s ) of the intensity I 1s of the strongest peak to the intensity I 2s of the second strongest peak described in JCPDS. A composite material is prepared by blending the carbon fibers prepared by the method with, for example, a resin.
摘要翻译:一种生产碳纤维的方法,其中所述制备方法包括使载体型催化剂和含碳原子的化合物在加热区中彼此接触,其中所述负载型催化剂通过以下方法制备:包括浸渍 具有含胶体的催化剂的粉末载体,以在具有特别显影的晶面的粉末载体上支撑催化剂颗粒,例如粉末状载体为4或更大,其强度为I 1的强度I 1(I 1 / I 2) 在X射线衍射中观察到的第二最强峰的强度I 2的峰值,或具有最强峰的强度I 1与第二强度的强度I 2之比(I 1 / I 2)的粉末载体 在X射线衍射中观察到的最强峰的强度I 1s与JCPDS中描述的第二最强峰的强度I 2s的比值(I 1s / I 2s)的1.5倍或更多的峰值。 通过将通过该方法制备的碳纤维与例如树脂混合来制备复合材料。
摘要:
It relates to high purity single-walled carbon nanotubes having controlled diameter, useful as industrial materials, including high-strength carbon wire rods, particularly uniform single-walled carbon nanotubes having diameter fallen in a range of from 1.0 to 2.0 nm, and a method for producing the same efficiently, in large amount and inexpensively. The single-walled carbon nanotube obtained is characterized in that its diameter is fallen in a range of from 1.0 to 2.0 nm, and an intensity ratio IG/ID between G-band and D-band in a Raman spectrum is 200 or more. Furthermore, those single-walled carbon nanotubes are synthesized by a gas-phase flow CVD method that uses a saturated aliphatic hydrocarbon which is liquid at ordinary temperature as a first carbon source and an unsaturated aliphatic hydrocarbon which is gas at ordinary temperature as a second carbon source.