A. M. Vorobei, Ya. P. Rubtsov, Ya. I. Zuev, O. O. Parenago
{"title":"Dispersion of Carbon Nanotubes Using Multiple Rapid Expansion of Supercritical Suspensions","authors":"A. M. Vorobei, Ya. P. Rubtsov, Ya. I. Zuev, O. O. Parenago","doi":"10.1134/S1990793124701318","DOIUrl":null,"url":null,"abstract":"<p>The degree of deagglomeration of carbon nanotubes (CNTs) was correlated with the number of treatments by rapid expansion of supercritical suspensions (RESS) under different conditions. Two RESS treatments make it possible to increase the degree of CNT deagglomeration more efficiently than one treatment. Three treatments in the case of the nitrogen solvent lead to a slight increase in the degree of dispersion compared to two treatments. When the CO<sub>2</sub> solvent is used, three treatments lead to a lower degree of dispersion compared to two treatments. When nitrogen is used as a dispersion medium, changes in the temperature and pressure do not lead to a change in the degree of dispersion of CNTs. In the case of CO<sub>2</sub>, a decrease in the fluid density ensures higher efficiency of CNT processing. Thus, for efficient dispersion of CNTs by multiple RESS, it is reasonable to use either two treatments with nitrogen or treatment with low-density CO<sub>2</sub>.</p>","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"18 8","pages":"1767 - 1774"},"PeriodicalIF":1.4000,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry B","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1990793124701318","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The degree of deagglomeration of carbon nanotubes (CNTs) was correlated with the number of treatments by rapid expansion of supercritical suspensions (RESS) under different conditions. Two RESS treatments make it possible to increase the degree of CNT deagglomeration more efficiently than one treatment. Three treatments in the case of the nitrogen solvent lead to a slight increase in the degree of dispersion compared to two treatments. When the CO2 solvent is used, three treatments lead to a lower degree of dispersion compared to two treatments. When nitrogen is used as a dispersion medium, changes in the temperature and pressure do not lead to a change in the degree of dispersion of CNTs. In the case of CO2, a decrease in the fluid density ensures higher efficiency of CNT processing. Thus, for efficient dispersion of CNTs by multiple RESS, it is reasonable to use either two treatments with nitrogen or treatment with low-density CO2.
期刊介绍：
Russian Journal of Physical Chemistry B: Focus on Physics is a journal that publishes studies in the following areas: elementary physical and chemical processes; structure of chemical compounds, reactivity, effect of external field and environment on chemical transformations; molecular dynamics and molecular organization; dynamics and kinetics of photoand radiation-induced processes; mechanism of chemical reactions in gas and condensed phases and at interfaces; chain and thermal processes of ignition, combustion and detonation in gases, two-phase and condensed systems; shock waves; new physical methods of examining chemical reactions; and biological processes in chemical physics.
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