2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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Clean Technology 2008

Investigation of the Convection Effect on Pyrolytic Synthesis of Carbon Nanostructures

N.F. Javadov, V.A. Bogolepov, D.V. Schur, S.Yu. Zaginaichenko, N.S. Astratov, A.A. Rudnitskaya, E.A. Lysenko, T.I. Shaposhnikova, L.I. Kopylova, T.N. Golovchenko
Institute of Petrochemical Processes, AZ

Keywords:
convection effect, pyrolytic synthesis, carbon nanostructures

Abstract:
The unique complex of mechanical and electrical properties of carbon nanotubes (CNT) may be used in composites when synthesized CNT or ropes from them are centimeters long. This work considers a possibility to synthesize carbon ropes having centimeters length and comprising CNT. Moreover, the effect of gas flows on morphology of the product formed has been investigated. The first experiments have shown that the direction of gas flow movement has a considerable effect on morphology of the product and its yield. When the working mixture is fed in the direction of the convective flow, the yield is twice as large as that opposite to the flow. In this case the yield is increased owing to the increasing geometrical dimensions of fibers. When the reactor is positioned at 45o to horizon, the effect is opposite. When the working mixture is fed opposite to the convective flow, the yield is increased twice with approximately the same geometry of fibers. The characteristic feature of the last two experiments is a high percentage of spiral fibers present in the product bulk. We have succeeded to synthesize bunches of nanotubes that are united in fibers. However their length does not exceed 100 mm. As it is seen at large magnification, thick fibers comprise bunches of CNT. However we have failed to prepare fibers centimeters long. Further investigations are required.


Nanotech 2008 Conference Program Abstract