Suppression and Regeneration of Camphor-Driven Marangoni Flow with the Addition of Sodium Dodecyl Sulfate

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• 作者：Yumihiko S. Ikura ; Ryoichi Tenno ; Hiroyuki Kitahata ; Nobuhiko J. Suematsu ; Satoshi Nakata
• 刊名：The Journal of Physical Chemistry B
• 出版年：2012
• 出版时间：January 26, 2012
• 年：2012
• 卷：116
• 期：3
• 页码：992-996
• 全文大小：386K
• 年卷期：v.116,no.3(January 26, 2012)
• ISSN：1520-5207

文摘

We investigated the Marangoni flow around a camphor disk on water with the addition of sodium dodecyl sulfate (SDS). The flow velocity decreased with an increase in the concentration of SDS in the aqueous phase, and flow was hardly observed around the critical micelle concentration (cmc), because SDS reduced the driving force of Marangoni flow. However, the flow velocity increased with a further increase in the concentration of SDS. Thus, the Marangoni flow is maximally inhibited around the cmc of SDS. In this paper, we concluded that the regeneration of Marangoni flow originates from an increase in the dissolution rate of camphor into the SDS aqueous solution.