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Open AccessArticle

Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions

1
Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119071 Moscow, Russia
2
Moscow Institute of Physics and Technology, National Research University, 141701 Dolgoprudny, Russia
3
Chemical Department, Lomonosov Moscow State University, 119234 Moscow, Russia
4
G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 153045 Ivanovo, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Mauro Banchero
Molecules 2020, 25(18), 4061; https://doi.org/10.3390/molecules25184061
Received: 4 August 2020 / Revised: 1 September 2020 / Accepted: 3 September 2020 / Published: 5 September 2020
(This article belongs to the Special Issue Applications of Supercritical Carbon Dioxide)
The effectiveness of carbon nanotubes (CNT) deagglomeration by rapid expansion of supercritical suspensions (RESS) in nitrogen and carbon dioxide fluids was studied in this work. Two different mechanisms of deagglomeration were proposed for these two fluids at various temperature and pressure conditions. Ultrasound attenuation spectroscopy was applied as an express method of determining median diameter and aspect ratio of CNTs. At least twofold reduction of the diameter was shown for CNT bundles processed by RESS technique. Aspect ratio of processed CNTs, calculated from acoustic attenuation spectra, increased to 340. These results were in a good agreement with atomic force microscopy data. View Full-Text
Keywords: RESS; supercritical fluids; carbon nanotubes; ultrasound RESS; supercritical fluids; carbon nanotubes; ultrasound
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Ustinovich, K.B.; Ivanov, V.V.; Tokunov, Y.M.; Loshkarev, A.A.; Sapronova, N.I.; Vorobei, A.M.; Parenago, O.O.; Kiselev, M.G. Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions. Molecules 2020, 25, 4061.

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