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Bubble Rise Velocity and Surface Mobility in Aqueous Solutions of Sodium Dodecyl Sulphate and n-Propanol.
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SYSNO ASEP 0521018 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Bubble Rise Velocity and Surface Mobility in Aqueous Solutions of Sodium Dodecyl Sulphate and n-Propanol. Author(s) Basařová, P. (CZ)
Kryvel, Y. (CZ)
Crha, Jakub (UCHP-M) RID, ORCID, SAIArticle number 743 Source Title Minerals. - : MDPI - ISSN 2075-163X
Roč. 9, č. 12 (2019)Number of pages 10 s. Language eng - English Country CH - Switzerland Keywords bubble velocity ; bubble surface mobility ; surfactant Subject RIV CI - Industrial Chemistry, Chemical Engineering OECD category Chemical engineering (plants, products) R&D Projects GA19-09518S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UCHP-M - RVO:67985858 UT WOS 000506636900027 EID SCOPUS 85076098060 DOI https://doi.org/10.3390/min9120743 Annotation Aqueous solutions of simple alcohols exhibit many anomalies, one of which is a change in the mobility of the bubble surface. This work aimed to determine the effect of the presence of another surface-active agent on bubble rise velocity and bubble surface mobility. The motion of the spherical bubble in an aqueous solution of n-propanol and sodium dodecyl sulphate (SDS) was monitored by a high-speed camera. At low alcohol concentrations (x(P) < 0.01), both the propanol and SDS molecules behaved as surfactants, the surface tension decreased and the bubble surface was immobile. The effect of the SDS diminished with increasing alcohol concentrations. In solutions with a high propanol content (x(P) > 0.1), the SDS molecules did not adsorb to the phase interface and thus, the surface tension of the solution was not reduced with the addition of SDS. Due to the rapid desorption of propanol molecules from the bottom of the bubble, a surface tension gradient was not formed. The drag coefficient can be calculated using formulas for the mobile surface of a spherical bubble. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2020 Electronic address https://www.mdpi.com/2075-163X/9/12/743
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