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

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 condit...

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Autores principales: Ustinovich, Konstantin B., Ivanov, Victor V., Tokunov, Yurij M., Loshkarev, Alexander A., Sapronova, Natalya I., Vorobei, Anton M., Parenago, Olga O., Kiselev, Michael G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7570609/
https://www.ncbi.nlm.nih.gov/pubmed/32899530
http://dx.doi.org/10.3390/molecules25184061
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author Ustinovich, Konstantin B.
Ivanov, Victor V.
Tokunov, Yurij M.
Loshkarev, Alexander A.
Sapronova, Natalya I.
Vorobei, Anton M.
Parenago, Olga O.
Kiselev, Michael G.
author_facet Ustinovich, Konstantin B.
Ivanov, Victor V.
Tokunov, Yurij M.
Loshkarev, Alexander A.
Sapronova, Natalya I.
Vorobei, Anton M.
Parenago, Olga O.
Kiselev, Michael G.
author_sort Ustinovich, Konstantin B.
collection PubMed
description 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.
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spelling pubmed-75706092020-10-28 Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions Ustinovich, Konstantin B. Ivanov, Victor V. Tokunov, Yurij M. Loshkarev, Alexander A. Sapronova, Natalya I. Vorobei, Anton M. Parenago, Olga O. Kiselev, Michael G. Molecules Article 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. MDPI 2020-09-05 /pmc/articles/PMC7570609/ /pubmed/32899530 http://dx.doi.org/10.3390/molecules25184061 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ustinovich, Konstantin B.
Ivanov, Victor V.
Tokunov, Yurij M.
Loshkarev, Alexander A.
Sapronova, Natalya I.
Vorobei, Anton M.
Parenago, Olga O.
Kiselev, Michael G.
Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions
title Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions
title_full Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions
title_fullStr Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions
title_full_unstemmed Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions
title_short Study of Dispersions of Carbon Nanotubes Modified by the Method of Rapid Expansion of Supercritical Suspensions
title_sort study of dispersions of carbon nanotubes modified by the method of rapid expansion of supercritical suspensions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7570609/
https://www.ncbi.nlm.nih.gov/pubmed/32899530
http://dx.doi.org/10.3390/molecules25184061
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