Physical properties enhancement of carbon fiber obtained from isotropic pitch doped by ultra-long carbon nanotubes
Kirill O. Gryaznov,
Dmitry S. Lugvishchuk,
Nikita V. Kazennov,
Aida R. Karaeva,
Edward B. Mitberg,
Oleg N. Abramov,
Dmitry V. Zhigalov,
Natalia Yu. Beilina,
Dmitry B. Verbets,
Irina Yu. Markova,
Anastasia V. Nakhodnova,
Vladimir Z. Mordkovich
Affiliations
Kirill O. Gryaznov
The State Scientific Center of the Russian Federation, Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow 108840, Russia; Corresponding author.
Dmitry S. Lugvishchuk
The State Scientific Center of the Russian Federation, Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow 108840, Russia
Nikita V. Kazennov
The State Scientific Center of the Russian Federation, Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow 108840, Russia
Aida R. Karaeva
The State Scientific Center of the Russian Federation, Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow 108840, Russia
Edward B. Mitberg
The State Scientific Center of the Russian Federation, Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow 108840, Russia
Oleg N. Abramov
The State Scientific Center of the Russian Federation, State Research Institute for Chemistry and Technology of Organoelement Compounds, Moscow 105118, Russia
Dmitry V. Zhigalov
The State Scientific Center of the Russian Federation, State Research Institute for Chemistry and Technology of Organoelement Compounds, Moscow 105118, Russia
Natalia Yu. Beilina
Scientific Research Institute for Graphite-based Construction Materials, NIIGrafit, Moscow 111524, Russia
Dmitry B. Verbets
Scientific Research Institute for Graphite-based Construction Materials, NIIGrafit, Moscow 111524, Russia
Irina Yu. Markova
Scientific Research Institute for Graphite-based Construction Materials, NIIGrafit, Moscow 111524, Russia
Anastasia V. Nakhodnova
Scientific Research Institute for Graphite-based Construction Materials, NIIGrafit, Moscow 111524, Russia
Vladimir Z. Mordkovich
The State Scientific Center of the Russian Federation, Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow 108840, Russia
Carbon fibers (CF) were formed from carbon nanotube-doped isotropic petroleum pitch. Ultra-long (the length of a single filament is more than 10,000 nm) double-walled carbon nanotubes (DWCNT) were used for doping in concentrations from 0.1 to 1.0 wt.%. The produced CF were investigated both in pristine and graphitized form. Physical properties (electrical resistivity, thermal conductivity coefficient), as well as X-ray diffraction (XRD) analysis and Raman spectroscopy of obtained DWCNT-doped CF were investigated. The influence of DWCNT concentration on the properties is nonlinear due to the influence on the CF molding mode and heterogeneity of the DWCNT distribution in the filament body. An increase in the DWCNT concentration, on the one hand, causes an enhancement in the thermal conductivity coefficient, and a decrease in the electrical resistivity of the fibers, on the other hand, it leads to local inhomogeneities formation in the material structure («gas bubbles»), as well as distortions of the CF outer surface. An increase in the DWCNT concentration also leads to an increase in CF average diameter and hollow filaments formation. This feature is paving the way to the development of novel technological methods to control CF properties and morphology, especially to feasible hollow CF composites manufacture.
