FIELD: nanotubes.
SUBSTANCE: invention relates to a method for producing elongated, unentangled fibres from nanotubes. The method includes: (i) introducing a liquid mixture into the lower part of a vertically oriented reactor, at least partially filled with heated dense gas with a volumetric flow rate of 1-5 standard litres per minute containing (a) a metal catalyst precursor, (b) a conditioning compound and (c) a carbon source; (ii) moving this liquid mixture upward through a vertically oriented reactor; (iii) causing the decomposition of the metal catalyst precursor into metal catalyst particles and the carbon source into carbon atoms; (iv) depositing carbon atoms onto metal catalyst particles to form elongated, unentangled nanotube fibres; and (v) discharging elongated, unentangled nanotube fibres from the top of the vertically oriented reactor. The invention also relates to a vertically oriented chemical deposition system.
EFFECT: present invention provides a non-contact method for creating desired elongation flows, thereby eliminating or reducing the problem of contamination to produce elongated, unentangled CNTs.
10 cl, 6 dwg
