A method for preparing carbon nanotubes, nanofibres or nanofilaments by decomposition of at least one carbon precursor in the presence of a catalyst, in which method continuously:—a first gas stream comprising a precursor of a catalyst is brought into contact with a porous substrate (43);—a second gas stream comprising at least one carbon precursor is brought into contact with said porous substrate (43);—said porous substrate (43) is heated to a temperature leading to the deposition of catalyst particles and to the catalytic growth of carbon nanotubes.

A method for preparing carbon nanotubes, nanofibres or nanofilaments by decomposition of at least one carbon precursor in the presence of a catalyst, in which method continuously:—a first gas stream comprising a precursor of a catalyst is brought into contact with a porous substrate (43);—a second gas stream comprising at least one carbon precursor is brought into contact with said porous substrate (43);—said porous substrate (43) is heated to a temperature leading to the deposition of catalyst particles and to the catalytic growth of carbon nanotubes.

Embodiments of the present disclosure relate to a process for making a carbon nanomaterial fiber product and/or textile product. Such products may have new and/or enhanced properties as compared to similar products and, according to the embodiments of the present disclosure, it is less expensive to make.

A carbon nanotube assembled wire includes a plurality of carbon nanotubes, wherein in a Raman spectrum of the carbon nanotube assembled wire, a ratio IB/IA of an integrated intensity IA in a range of a Raman shift of 120 cm.sup.−1 or more and 210 cm.sup.−1 or less and an integrated intensity IB in a range of a Raman shift of more than 210 cm.sup.−1 and 280 cm.sup.−1 or less is 0.1 or more.

The present disclosure provides a method for producing elongated non-entangled nanotube filaments using a vertical upward flow floating catalyst chemical vapor deposition system.

A low carbon footprint material is used to decrease the carbon dioxide emission for production of a high carbon footprint substance. A method of forming composite materials comprises providing a first high carbon footprint substance; providing a carbon nanomaterial produced with a carbon-footprint of less than 10 unit weight of carbon dioxide (CO.sub.2) emission during production of 1 unit weight of the carbon nanomaterial; and forming a composite comprising the high carbon footprint substance and from 0.001 wt % to 25 wt % of the carbon nanomaterial, wherein the carbon nanomaterial is homogeneously dispersed in the composite to reduce the carbon dioxide emission for producing the composite material relative to the high carbon footprint substance.

Disclosed is an apparatus for manufacturing a carbon nanotube fiber.

The present invention relates to an apparatus for producing a carbon nanotube fiber. The apparatus includes: a vertical reactor having a reaction zone; a concentric double-pipe inlet tube disposed on top of the reaction zone and consisting of an inner pipe through which a spinning feedstock including a spinning solution and a first gas is introduced into the reaction zone and an outer pipe defining a concentric annular portion surrounding the inner pipe and through which a second gas is introduced into the reaction zone; heating means for heating the reaction zone; and a discharge unit disposed under the bottom of the reaction zone to discharge a carbon nanotube fiber therethrough. The spinning feedstock entering the reaction zone through the inner pipe of the inlet tube is carbonized and graphitized while flowing from the top to the bottom of the reaction zone to form a carbon nanotube fiber consisting of a continuous sock (or aggregates) of carbon nanotubes. The second gas entering the reaction zone through the outer pipe of the inlet tube forms a gas curtain surrounding the circumference of the continuous sock of carbon nanotubes while flowing from the top to the bottom of the reaction zone. The gas curtain minimizes the contamination of the inner wall of the reactor and facilitates the discharge of the carbon nanotube fiber. Therefore, the apparatus of the present invention is suitable for the production of a carbon nanotube fiber in a continuous manner.

The present invention relates to an apparatus for producing a carbon nanotube fiber. The apparatus includes: a vertical reactor having a reaction zone; a concentric double-pipe inlet tube disposed on top of the reaction zone and consisting of an inner pipe through which a spinning feedstock including a spinning solution and a first gas is introduced into the reaction zone and an outer pipe defining a concentric annular portion surrounding the inner pipe and through which a second gas is introduced into the reaction zone; heating means for heating the reaction zone; and a discharge unit disposed under the bottom of the reaction zone to discharge a carbon nanotube fiber therethrough. The spinning feedstock entering the reaction zone through the inner pipe of the inlet tube is carbonized and graphitized while flowing from the top to the bottom of the reaction zone to form a carbon nanotube fiber consisting of a continuous sock (or aggregates) of carbon nanotubes. The second gas entering the reaction zone through the outer pipe of the inlet tube forms a gas curtain surrounding the circumference of the continuous sock of carbon nanotubes while flowing from the top to the bottom of the reaction zone. The gas curtain minimizes the contamination of the inner wall of the reactor and facilitates the discharge of the carbon nanotube fiber. Therefore, the apparatus of the present invention is suitable for the production of a carbon nanotube fiber in a continuous manner.

Disclosed herein is a scaled method for producing substantially aligned carbon nanotubes by depositing onto a continuously moving substrate, (1) a catalyst to initiate and maintain the growth of carbon nanotubes, and (2) a carbon-bearing precursor. Products made from the disclosed method, such as monolayers of substantially aligned carbon nanotubes, and methods of using them are also disclosed.