Disclosed is an apparatus for manufacturing a carbon nanotube fiber.

The invention relates to a method for the production of thermally stabilised melt spun fibres, in which polyacrylonitrile (PAN) fibres or PAN fibre precursors produced by melt spinning are treated in an aqueous alkaline solution which comprises in addition a solvent for PAN. Likewise, the invention relates to fibres which are producible according to this method.

A method for making carbon fiber film includes growing a carbon nanotube array on a surface of a growth substrate. A carbon nanotube film is pulled out from the carbon nanotube array, and pass through a reaction room. A negative voltage is applied to the carbon nanotube film. A carrier gas and a carbon source gas are supplied to the reaction room to form graphite sheets on the carbon nanotube film.

The disclosed materials, methods, and apparatus, provide novel ultra-high temperature materials (UHTM) in fibrous forms/structures; such “fibrous materials” can take various forms, such as individual filaments, short-shaped fiber, tows, ropes, wools, textiles, lattices, nano/microstructures, mesostructured materials, and sponge-like materials. At least four important classes of UHTM materials are disclosed in this invention: (1) carbon, doped-carbon and carbon alloy materials, (2) materials within the boron-carbon-nitride-X system, (3) materials within the silicon-carbon-nitride-X system, and (4) highly-refractory materials within the tantalum-hafnium-carbon-nitride-X and tantalum-hafnium-carbon-boron-nitride-X system. All of these material classes offer compounds/mixtures that melt or sublime at temperatures above 1800° C.—and in some cases are among the highest melting point materials known (exceeding 3000° C.). In many embodiments, the synthesis/fabrication is from gaseous, solid, semi-solid, liquid, critical, and supercritical precursor mixtures using one or more low molar mass precursor(s), in combination with one or more high molar mass precursor(s). Methods for controlling the growth, composition, and structures of UHTM materials through control of the thermal diffusion region are disclosed.

A method for making carbon fiber film includes growing a carbon nanotube array on a surface of a growth substrate. A carbon nanotube film is pulled out from the carbon nanotube array, and pass through a reaction room. A negative voltage is applied to the carbon nanotube film. A carrier gas and a carbon source gas are supplied to the reaction room to form graphite sheets on the carbon nanotube film.

Disclosed is an apparatus for manufacturing a carbon nanotube fiber.

Disclosed is an apparatus for manufacturing carbon nanotube fibers, which includes: a synthesis furnace that provides a space therein where a carbon nanotube fiber is synthesized; a raw material supplier that supplies a liquid-state raw material for a carbon nanotube into the synthesis furnace; a gas supplier that supplies a carrying gas into the synthesis furnace; a sub-synthesis furnace that is formed in the shape of a pipe and disposed at the upper portion in the synthesis furnace, and in which the raw material for a fiber flows along the inner side; a nozzle that sprays the raw material for a fiber supplied by the raw material supplier to the inner wall of the sub-synthesis furnace; and a heater that disposed along the outer side of the synthesis furnace.