Lattice model for the wetting transition of alkanes on aqueous surfactant solutions.
Lattice model for the wetting transition of alkanes on aqueous surfactant solutions.
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DOI：
10.1021/la052632a
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发表时间：
2006-01
期刊：
影响因子：
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通讯作者：
H. Matsubara;M. Aratono;K. M. Wilkinson;C. Bain
中科院分区：
文献类型：
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作者：
H. Matsubara;M. Aratono;K. M. Wilkinson;C. Bain
烷烃液滴在阳离子表面活性剂C（n）TAB（CH_3（CH_2）（n-1）N ~+（CH_3）_3Br ~-）的水溶液中，随着表面活性剂浓度的增加，表现出一级润湿转变。提出了一个理论模型，其中的表面自由能被分解成一个长程色散相互作用和一个短程相互作用所描述的二维晶格气，考虑到油和表面活性剂分子之间的相互作用。该模型提供了定量协议与所观察到的润湿过渡和变化的组成的润湿膜与散装表面活性剂浓度。本文讨论了油滴在稀表面活性剂大油层上的行为。
Droplets of alkanes on aqueous solutions of the cationic surfactants C(n)TAB (CH3(CH2)(n-1)N+ (CH3)3Br-) exhibit a first-order wetting transition as the concentration of the surfactant is increased. A theoretical model is presented in which the surface free energy is broken down into a long-range dispersion interaction and a short-range interaction described by a 2D lattice gas, taking into account the interaction between oil and surfactant molecules. The model provides quantitative agreement with the observed wetting transitions and the variation in composition of the wetting film with bulk surfactant concentration. The behavior of oil drops on large reservoirs of dilute surfactant is discussed.