Diffusiophoresis of a charged drop
Diffusiophoresis of a charged drop
复制标题
带电液滴的扩散电泳
DOI：
10.1017/jfm.2018.531
复制
发表时间：
2016
影响因子：
3.7
通讯作者：
H. Stone
中科院分区：
文献类型：
--
作者：
Fan Yang;Sangwoo Shin;H. Stone
扩散电泳描述了胶体在存在浓度梯度的电解质或非电解质溶液中的运动。虽然大多数关于扩散电泳的研究都集中在固体颗粒的运动上，但也已知诸如液滴和气泡之类的软物体会经历扩散电泳。在这里，我们调查的电解质溶液中的荷电液滴的扩散电泳分析和实验。假设液滴保持球形。本文用微扰法求得液滴扩散电泳速度的解析解。我们发现液滴内部的流动是由界面处的切向电应力驱动的，它直接影响液滴的扩散电泳速度。使用带电油滴，我们测量的溶质浓度梯度下的滴速，并找到良好的协议与解析解。我们的研究结果在石油开采和药物输送方面具有潜在的应用价值。
Diffusiophoresis describes the motion of colloids in an electrolyte or non-electrolyte solution where there is a concentration gradient. While most of the studies of diffusiophoresis focus on the motion of solid particles, soft objects such as drops and bubbles are also known to experience diffusiophoresis. Here, we investigate the diffusiophoresis of charged drops in an electrolyte solution both analytically and experimentally. The drop is assumed to remain spherical. An analytical solution of the diffusiophoretic velocity of drops is obtained by perturbation methods. We find that the flow inside the drop is driven by the tangential electric stress at the interface and it directly influences the diffusiophoretic speed of the drop. Using charged oil droplets, we measure the drop speed under solute concentration gradients and find good agreement with the analytical solution. Our findings have potential applications for oil recovery and drug delivery.
DOI：
10.1073/pnas.1604743113
发表时间：
2016-08-02
影响因子：
11.1
作者：
Banerjee, Anirudha;Williams, Ian;Squires, Todd M.
通讯作者：
Squires, Todd M.
DOI：
10.1002/anie.201305759
发表时间：
2013-10-11
期刊：
Angewandte Chemie (International ed. in English)
影响因子：
--
作者：
Yadav V;Freedman JD;Grinstaff M;Sen A
通讯作者：
Sen A