摘要:
The disclosed is a conductive coating material which includes an organic binder component and carbon fibrous structures, wherein the carbon fibrous structure comprises a three dimensional network of carbon fibers each having an outside diameter of 15-100 nm, wherein the carbon fibrous structure further comprises a granular part with which the carbon fibers are tied together in the state that the concerned carbon fibers are externally elongated therefrom, and wherein the granular part is produced in a growth process of the carbon fibers; and wherein the carbon fibrous structures are contained at a rate of 0.01-50% by weight based on the total weight of the coating material. The conductive coating material gives a coated film which shows a high electrical conductivity and a good film strength, and also coordinates its color as an intended one easily.
摘要:
By using a high electromagnetic wave absorbing loss material and adding it in a small amount to a matrix, an electromagnetic wave absorber useful for GHz band, which can demonstrate the electromagnetic wave absorption capability without ruining characteristics of the matrix, and can enjoy a good formability and a low manufacturing cost, is provided.The disclosed is an electromagnetic wave absorber which is characterized in that carbon fibrous structures are contained in the matrix, at a rate of 0.01-25% by weight based on the total weight, wherein the carbon fibrous structure comprises a three dimensional network of carbon fibers each having an outside diameter of 15-100 nm, wherein the carbon fibrous structure further comprises a granular part with which the carbon fibers are tied together in the state that the concerned carbon fibers are externally elongated therefrom, and wherein the granular part is produced in a growth process of the carbon fibers.
摘要:
The disclosed is a colored polymer composition which includes carbon fibrous structures and a coloring agent in a polymer matrix, wherein the carbon fibrous structure comprises a three dimensional network of carbon fibers each having an outside diameter of 15-100 nm, wherein the carbon fibrous structure further comprises a granular part with which the carbon fibers are tied together in the state that the concerned carbon fibers are externally elongated therefrom, and wherein the granular part is produced in a growth process of the carbon fibers. It is the colored polymer composition which includes novel carbon fibrous structures having preferable physical properties as a filler for composite material, and of being able to improve electrical, mechanical and thermal properties of a matrix while maintaining other properties of the matrix, in a small adding amount, and which can show a color as pleases. When a white coloring agent is used as the coloring agent, the darkness in color tone of the polymer which is due to the addition of the carbon fibrous structure can be easily corrected by adding a relatively small amount of the white coloring agent as the coloring agent.
摘要:
The invention provides a zeolite membrane production apparatus (100) comprising: a reaction container (3) which has a support insertion opening (3c) for insertion of tubular supports (1) and which houses a reaction solution (2) for formation of zeolite membranes on the surfaces of the supports (1), a heating means (4) for heating the reaction solution (2) through the reaction container (3), and a supporting apparatus (5) which is provided on the reaction container (3) in a freely detachable manner and which supports a plurality of the supports (1); wherein: the inner wall surface (S) of the reaction container (3) has two mutually parallel flat surfaces (S1, S2), the supporting apparatus (5) has a plurality of supporting sections (14a) that anchor one end of each of the plurality of supports (1), and the plurality of supporting sections (14a) are provided in the supporting apparatus (5) in such a manner that when the supporting apparatus (5) is set in the reaction container (3), each of the plurality of supports (1) is disposed between the two flat surfaces (S1, S2) and parallel to the two flat surfaces (S1, S2). According to the present invention, there is provided a zeolite membrane production apparatus that can simultaneously form zeolite membranes which are uniform with respect to a plurality of supports.
摘要:
Disclosed is a method for manufacturing carbon fibrous structures each of which comprises a three dimensional network of carbon fibers, which is characterized in that, in the procedure of carbon fiber vapor phase deposition utilizing decomposition of organic carbon compound, at least two kinds of organic carbon compounds as carbon sources are in existence at least at predetermined thermal decomposition reaction temperature range in a reaction furnace and partial pressures of gases of these compounds are regulated so that these compounds are decomposed at mutually different decomposition temperatures, and/or a raw material gas supplied into the reaction furnace is forced to form a turbulent flow. It is possible to obtain efficiently the carbon fibrous structures each of which comprises a three dimensional network of carbon fibers and which are suitable as additives to be added to solid materials, such as resin, ceramics, metal, etc., to improve physical properties, such as electric, mechanical, or thermal properties, of the solid materials, and also as additives to be added to liquid materials, such as fuels, lubricant oils, and etc., to improve physical properties, such as thermal property, of the liquid materials.
摘要:
The disclosed is a transparent conductive film that includes a matrix and carbon fibrous structures added to the matrix, wherein the carbon fibrous structures comprise carbon fibers, each having an outside diameter of 15-100 nm, and wherein the carbon fibrous structures each comprise a granular part at which two or more carbon fibers are bound to each other, and wherein the granular part is concurrently produced in a growth process for the carbon fibers. When the transparent conductive film is formed at a thickness of 0.1-5 μm on a glass substrate, it shows a surface resistivity of not more than 1.0×1012Ω/□, and a total light transmittance of not less than 30%. A coating composition for the conductive transparent film is prepared by using a media mill equipped with beads having an average diameter of 0.05-1.5 mm to disperse the carbon fibrous structures into the liquid resinous composition.
摘要:
Provided is a process for producing a single-walled carbon nanotube on a substrate on which a lot of fine particles comprising at least one kind of a catalyst metal are formed in a reaction apparatus maintained in vacuum, wherein at least one kind of fullerene C2n's (n is an integer of n≧18) is sublimated at a prescribed temperature or higher to produce a fullerene gas in which a partial pressure is controlled; the fullerene gas is transported on the substrate heated at a sublimation temperature of the fullerene or higher; and the fullerene gas is brought into contact with the catalyst metal fine particles described above to produce a single-walled carbon nanotube. The vacuum degree is preferably 0.5 Torr or less, and the sublimation temperature is preferably 700° C. or higher. The substrate has a thin film of a porous substance or an inorganic oxide, and transition metal catalyst fine particles having a particle diameter of 0.5 to 10 nm are formed on the above thin film.
摘要:
A dispersion compensation device for compensating chromatic dispersion of optical pulses launched from the exterior is disclosed. The device comprises a waveguide and a photonic crystal part, the waveguide comprising a core part for guiding the optical pulse from an input end to an output end and a clad part consisting of a first clad layer and a second clad layer, the photonic crystal part providing a chromatic dispersion variation of a proper dispersion characteristic to the optical pulses guided through the waveguide, the chromatic dispersion variation having an absolute value of the variation and a positive or negative sign, wherein the photonic crystal part is layered onto the first clad layer, the core part is layered onto the photonic crystal part, and the second clad part is formed so that a portion of which is layered onto the photonic crystal part and a remaining part of which covers the exposed surface of the core part.
摘要:
The present invention provides a carbon fibrous structure comprising a three dimensional network of carbon fibers, said carbon fibers each having an outside diameter of 15-100 nm, and said fibrous structure comprising a granular part with which said carbon fibers are bound in a state that said carbon fibers extend outwardly from the granular part, the granular part being produced in a growth process of the carbon fibers, and a method for making the same.