Forced Wetting Dynamics of Sodium Dodecyl Sulfate Glycerol Solution on Solid Substrates
Forced Wetting Dynamics of Sodium Dodecyl Sulfate Glycerol Solution on Solid Substrates
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DOI：
10.1007/s10765-012-1295-9
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发表时间：
2013-12
影响因子：
2.2
通讯作者：
Jun-Yue Zhu;Y. Duan;Xiao-dong Wang;Q. Min
中科院分区：
文献类型：
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作者：
Jun-Yue Zhu;Y. Duan;Xiao-dong Wang;Q. Min
采用Wilhelmy平板法研究了十二烷基硫酸钠甘油溶液在中间亲水性和亲水性固体基质上的强迫润湿动力学。测量了动态接触角θ θ不同接触线速度u （θ d - u关系）。研究了表面活性剂溶液浓度、基体表面自由能和表面张力等宏观性质对θ d - u关系的影响，认为这三个性质都是重要的。在实验中发现了一个有趣的现象，θ最初随着u的增加而增加，然后减少，这是现代理论模型无法解释的。用表面活性剂在三相接触线附近固气界面吸附的微观效应来解释这一现象。提出了一种改进的分子动力学模型，该模型能较好地描述实验结果。
The forced wetting dynamics of a sodium dodecyl sulfate glycerol solution on both intermediate hydrophilic and hydrophilic solid substrates was studied by using the Wilhelmy plate method. The dynamic contact angleθDat different contact line velocitiesU(θD–Urelationship) was measured. The influences of the macroscopic properties including the surfactant solution concentration, the substrate surface free energy, and the surface tension on theθD–Urelationship were investigated, and all three properties are important. An interesting phenomenon thatθDinitially increases then decreases withUwas found in the experiment, which could not be explained by modern theoretical models. The microscopic effect of the surfactant adsorption on the solid–vapor interface near the three-phase contact line was used to explain this phenomenon. A modified molecular-kinetic model was proposed, and the model can well describe the experimental results.