Flow patterns of ionic liquid based aqueous biphasic systems in small channels
Flow patterns of ionic liquid based aqueous biphasic systems in small channels
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DOI：
10.1016/j.ces.2022.118197
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发表时间：
2022-10
影响因子：
4.7
通讯作者：
Yiota-Victoria Phakoukaki;P. O'Shaughnessy;P. Angeli
中科院分区：
文献类型：
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作者：
Yiota-Victoria Phakoukaki;P. O'Shaughnessy;P. Angeli
通过在水中加入亲水离子液体（1-丁基-3-甲基咪唑氯，C4mimCl）和亲水盐（磷酸三钾，K3PO4）形成离子液体基双相水体系（IL-ABS）。研究了IL-ABS在内径为0.2、0.5和0.8 mm的毛细管通道中的流动规律；这是第一次研究这种两相流。离子液体和盐的三种重量浓度（18%，20%和22% wt%）在双相区域内选择。主要流型有塞流、分散流和平行流。研究发现，通道直径和重量浓度都会影响所观察到的流型。最后，利用毛细管数和雷诺数的组合绘制了广义流型图，其中研究了所有离子液体和盐浓度的塞流过渡边界崩溃。
Ionic liquid based aqueous biphasic systems (IL-ABS) were formed by the addition in water of a hydrophilic ionic liquid (1-Butyl-3-methylimidazolium Chloride, C4mimCl) and a kosmotropic salt (tripotassium phosphate, K3PO4). The flow patterns of IL-ABS were studied in capillary channels with 0.2, 0.5 and 0.8 mm internal diameter; this is the first time such two-phase flows have been investigated. Three weight concentrations of the ionic liquid and the salt (18, 20 and 22 wt%) were chosen within the biphasic region. The main flow patterns included plug, dispersed and parallel flow. It was found that both channel diameter and weight concentrations would affect the flow patterns observed. Finally, a generalized flow pattern map was plotted using a combination of capillary and Reynolds numbers, where the transition boundaries of plug flow collapsed for all ionic liquid and salt concentrations studied.