Mechanism of Foam Film Destruction Induced by Emulsified Oil: A Coarse-Grained Simulation Study

Published on Oct 24, 2018in Journal of Physical Chemistry C4.126
路 DOI :10.1021/ACS.JPCC.8B08151
Hongbing Wang7
Estimated H-index: 7
(China University of Petroleum),
Zhikun Wang10
Estimated H-index: 10
(China University of Petroleum)
+ 4 AuthorsSongqing Hu19
Estimated H-index: 19
(China University of Petroleum)
Sources
Abstract
Hydrophobic oil additives have been shown to be a unique class of chemicals in solution, which affect the stability of foam films. While the oil-induced destruction of a foam film has been largely understood, the entry process of the oil droplet to the foam film remains vague in experiments. Here, we perform mesoscale simulations to explore the mechanism of the oil droplet entering the gas/water interface of a foam film composed of sodium dodecyl sulfate (SDS). The microscopic entry process of the oil droplet is dynamically predicted, and the driving force for this process and relevant variation of foam stability are interpreted by measuring the structural and energetic evolutions of the foam film. We demonstrate that the oil droplet entry process depends significantly on the frother concentration and the emulsification degree. We classify the entry process at different frother concentrations and emulsification degrees into three types. Our simulations suggest that the three types of the entry process fol...
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