Mass transfer in the dissolution of a multicomponent liquid droplet in an immiscible liquid environment.
Mass transfer in the dissolution of a multicomponent liquid droplet in an immiscible liquid environment.
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DOI：
10.1021/la402533j
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发表时间：
2013-11-05
期刊：
影响因子：
--
通讯作者：
Needham D
中科院分区：
文献类型：
--
作者：
Su JT;Needham D
Epstein Plesset方程最近已被证明可以准确地预测纯液体微滴溶解到第二不混溶溶剂中，例如油溶解到水中。在这里，我们提出了一系列新的实验和修改这个方程来模拟溶解的两种组分的油混合物微滴到第二不混溶的溶剂，其中的两种材料的液滴具有不同的溶解度。该模型基于约化表面积近似和理想均匀混合的假设： 其中Afraci是组分I的面积分数; ci和cs是周围介质中液滴材料的初始浓度和饱和浓度; R是液滴的半径; t是时间;并且Di是组分I在周围介质中的扩散系数。这个新的模型已经通过使用一个双室微量移液器为基础的方法，测量溶解的单个单独的微滴的相互混溶的液体混合物（乙酸乙酯/乙酸丁酯，乙酸丁酯/乙酸戊酯）到水中进行了测试。我们还测量了纯物质的扩散系数：乙酸乙酯、乙酸丁酯和乙酸戊酯，在22 ℃的水中。纯乙酸盐在水中的扩散系数分别为：8.65 x 10−6、7.61 x 10−6和9.14 x 10−6 cm 2/s。该模型准确地预测了乙酸乙酯/乙酸丁酯和乙酸丁酯/乙酸戊酯系统的微滴的溶解，给出了每个单独的组分在水中的溶解度和扩散系数以及初始液滴半径。平均均方误差为8.96%。球形理想混合多组分液滴的溶解密切遵循这里提出的修改的Epstein Plesset模型。
The Epstein Plesset equation has recently been shown to accurately predict the dissolution of a pure liquid microdroplet into a second immiscible solvent, such as oil into water. Here, we present a series of new experiments and a modification to this equation to model the dissolution of a two-component oil-mixture microdroplet into a second immiscible solvent, in which the two materials of the droplet have different solubilities. The model is based upon a reduced surface area approximation and the assumption of ideal homogenous mixing: where Afraci is the area fraction of component I; ci and cs are the initial and saturation concentrations of the droplet material in the surrounding medium; R is the radius of the droplet; t is time; and Di is the coefficient of diffusion of component I in the surrounding medium. This new model has been tested by use of a two-chamber micropipette-based method, which measured the dissolution of single individual microdroplets of mutually-miscible liquid mixtures (ethyl acetate/butyl acetate, and butyl acetate/amyl acetate) into water. We additionally measured the diffusion coefficient of the pure materials: ethyl acetate, butyl acetate, and amyl acetate, in water at 22 deg C. Diffusion coefficients for the pure acetates in water were: 8.65 x 10−6, 7.61 x 10−6, and 9.14 x 10−6 cm2/s respectively. This model accurately predicts the dissolution of microdroplets for the ethyl acetate/butyl acetate and butyl acetate/amyl acetate systems given the solubility and diffusion coefficients of each of the individual components in water as well as the initial droplet radius. The average mean squared error was 8.96%. The dissolution of a spherical ideally mixed multi-component droplet closely follows the modified Epstein Plesset model presented here.
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DOI：
10.1021/je00043a019
发表时间：
1986-01-01
期刊：
JOURNAL OF CHEMICAL AND ENGINEERING DATA
影响因子：
--
作者：
STEPHENSON, R;STUART, J
通讯作者：
STUART, J
影响因子：
4.4
作者：
EPSTEIN, PS;PLESSET, MS
通讯作者：
PLESSET, MS
影响因子：
3.9
作者：
Duncan, PB;Needham, D
通讯作者：
Needham, D
影响因子：
10.8
作者：
Li, WI;Anderson, KW;DeLuca, PP
通讯作者：
DeLuca, PP
影响因子：
4.7
作者：
NAUMAN, EB
通讯作者：
NAUMAN, EB