Kovalchuk N M, Vollhardt D
Institute of Biocolloid Chemistry, 03142 Kiev, Ukraine.
J Phys Chem B. 2005 Dec 8;109(48):22868-75. doi: 10.1021/jp054452f.
The results of theoretical and experimental studies of spontaneous nonlinear oscillations produced at the liquid/liquid interface by surfactant transfer from a point source situated in one of the bulk phases are presented. The theoretical analysis is based on the direct numerical simulation of the system evolution. The experiments are performed for the heptane/water interface using middle-chain aliphatic alcohols as surfactants. The results for the oil/water interface are compared with the corresponding data obtained for the air/water interface. The presented results allow the conclusion that auto-oscillations at the air/liquid and liquid/liquid interfaces are governed by very similar mechanisms but their characteristics are strongly dependent on the properties of the two contacting media, in particular, on the surfactant partition coefficient.
本文给出了关于表面活性剂从位于其中一相主体中的点源转移至液/液界面时所产生的自发非线性振荡的理论和实验研究结果。理论分析基于系统演化的直接数值模拟。实验是在庚烷/水界面上以中链脂肪醇作为表面活性剂进行的。将油/水界面的结果与在空气/水界面获得的相应数据进行了比较。所呈现的结果表明，气/液和液/液界面处的自振荡由非常相似的机制控制，但其特性强烈依赖于两种接触介质的性质，特别是表面活性剂的分配系数。
