Dynamics of Liquid Oil that Flows Inside Aqueous Wet Foam,The Journal of Physical Chemistry B

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Dynamics of Liquid Oil that Flows Inside Aqueous Wet Foam
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2018-08-23 , DOI: 10.1021/acs.jpcb.8b05819
Azusa Kusaka ₁ , Junko Sonoda ₂ , Hitoshi Tajima ₂ , Takaya Sakai ₁

Affiliation

Wet soap foam spontaneously imbibes liquid oil without defoaming when it is brought into contact. The kinetics behind this recently observed phenomenon was studied experimentally, with focus on the origin of the suction force and on the oil front dynamics. Using an aqueous foam with an air volume fraction slightly greater than the critical value ϕ_C, we show that the pumping pressure of oil and/or miscible liquid into the wet foam is attributed to the interfacial distortion of the bubble surfaces. Two distinct regimes along time t were observed in the oil imbibition dynamics. The proceeding oil front evolves with t^1/2 dependency in the early imbibition time in accordance with the classical theory of penetration of a porous medium, whereas it departs into t^1/3 at late imbibition time. The latter process is attributed to the elongation of an oil branch trapped inside the foam when pumping of the exterior oil has ceased.

中文翻译：

在湿泡沫内流动的液态油动力学

湿肥皂泡沫在接触时会自发吸收液体油而不会消泡。通过实验研究了这个最近观察到的现象背后的动力学，重点是吸力的起源和油前沿动力学。使用空气体积分数略大于临界值ϕ _C的水性泡沫，我们显示出油和/或可混溶液体向湿泡沫中的泵送压力归因于气泡表面的界面变形。在吸油动力学中观察到了沿时间t的两种截然不同的状态。前进的油锋随着t ^1/2的变化而变化根据多孔介质渗透的经典理论，在早期的吸收时间有一定的依赖性，而在晚期的吸收时间则有t ^1/3的关系。后一过程归因于当外部油的泵送停止时困在泡沫内部的油分支的伸长。

更新日期：2018-08-23

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