Motion and dissolution of drops of sparingly soluble alcohols on water
Motion and dissolution of drops of sparingly soluble alcohols on water
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DOI：
10.1021/la800105h
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发表时间：
2008-07-15
期刊：
影响因子：
3.9
通讯作者：
Dickinson, J. T.
中科院分区：
文献类型：
--
作者：
Bates, C. M.;Stevens, F.;Dickinson, J. T.
互溶度低的液体的溶解通常是缓慢的。然而，由于表面张力的不稳定性和梯度，稀溶、低密度、低表面张力的液体液滴通常在水中迅速溶解。我们报道了广泛烷基链长的脂肪醇在水中溶解时液滴的运动和溶解的观察。通过加入少量的碘或其他染料，酒精滴变得可见。这些液滴表现出去湿不稳定、碎裂、指进和振荡。当醇碳链的长度从n=4增加到n=9时，溶解速度显著减慢。讨论了醇的溶解度和水表面积对快速溶解的促进作用。
The dissolution of liquids with low mutual solubility is typically slow. However, drops of sparingly soluble, low-density, low-surface-tension liquids often dissolve rapidly on water due to surface tension instabilities and gradients. We report observations of the motion and dissolution of drops of aliphatic alcohols of a wide range of alkyl chain lengths as they dissolve in water. The alcohol drops are rendered visible by adding small amounts of iodine or other dyes. These drops display dewetting instabilities, fragmentation, fingering, and oscillation. As the length of the alcohol carbon chain increases from n = 4 to n = 9, dissolution slows dramatically. The roles of alcohol solubility and water surface area in promoting rapid dissolution are discussed.