Dynamic wetting of imidazolium-based ionic liquids on gold and glass,Physical Chemistry Chemical Physics

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Dynamic wetting of imidazolium-based ionic liquids on gold and glass
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2017-12-18 00:00:00 , DOI: 10.1039/c7cp06404g
I. Delcheva _{1,

2,

3,

4,

5} , D. A. Beattie _{1,

2,

3,

4,

5} , J. Ralston _{2,

3,

4,

6,

7} , M. Krasowska _{1,

2,

3,

4,

5}

Affiliation

Many of the applications of ionic liquids rely on their bulk properties or their solvation abilities. However, it is their interactions with solid surfaces that underpin many of their potential applications in advanced technologies. Whether it is as lubricants for wind turbines or as electrolytes in supercapacitors, there are many areas where ionic liquids can provide an improvement in performance relative to more commonplace liquids. However, there are some barriers to their implementation in such applications. Foremost of these is the lack of systematic studies of their interactions with solid surfaces as well as neglecting the effect of the absorbed water on wetting. The present study explores the dynamic wetting of three ionic liquids (with a different length of hydrocarbon chain in the cation) on gold and glass substrates, both of which are relevant for nano- and micromechanical machine applications, under well-controlled environmental conditions. The form of data capture (Wilhelmy plate) allows for a direct analysis using analytical expressions for the two dominant approaches for dynamic wetting: the hydrodynamic and molecular kinetic models. All ionic liquids yield data that are described best by the molecular kinetic model. Substrate-ionic liquid and water–ionic liquid interactions contribute to the mechanisms involved in the wetting process.

中文翻译：

咪唑基离子液体在金和玻璃上的动态润湿

离子液体的许多应用都依赖于其整体性质或溶剂化能力。但是，正是它们与固体表面的相互作用支撑了它们在先进技术中的许多潜在应用。无论是用作风力涡轮机的润滑剂还是用作超级电容器中的电解质，在许多领域，离子液体都可以相对于更普通的液体改善性能。但是，在此类应用程序中实施它们会遇到一些障碍。其中最重要的是缺乏对它们与固体表面相互作用的系统研究，并且忽略了吸收水对润湿的影响。本研究探讨了金和玻璃基材上三种离子液体（阳离子中烃链的长度不同）的动态润湿，在良好控制的环境条件下，这两者都与纳米机械和微机械机器的应用有关。数据捕获的形式（Wilhelmy板）允许使用解析表达式对两种主要的动态润湿方法进行直接分析：流体动力学和分子动力学模型。所有离子液体产生的数据都可以通过分子动力学模型得到最好的描述。底物离子液体和水离子液体的相互作用有助于润湿过程中的机理。所有离子液体产生的数据都可以通过分子动力学模型得到最好的描述。底物离子液体和水离子液体的相互作用有助于润湿过程中涉及的机制。所有离子液体产生的数据都可以通过分子动力学模型得到最好的描述。底物离子液体和水离子液体的相互作用有助于润湿过程中的机理。

更新日期：2017-12-18

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