Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
Phys Rev E. 2019 Aug;100(2-1):023114. doi: 10.1103/PhysRevE.100.023114.
The transport dynamics of oil-soluble surfactants to oil-water interfaces are quantified using a custom-built electrified capillary microtensiometer platform. Dynamic interfacial tension measurements reveal that surfactant transport is enhanced under a dc electric field, due to electro-migration of charge carriers in the oil toward the interface. Notably, this enhancement can be precisely tuned by altering the field strength and temporal scheduling. We demonstrate electric fields as a new parameter to manipulate surfactant transport to microscale fluid-fluid interfaces.
使用定制的电化毛细微张力计平台定量研究了油溶性表面活性剂向油水界面的传输动力学。动态界面张力测量表明，由于电荷载流子在油中向界面的电迁移，直流电场增强了表面活性剂的传输。值得注意的是，通过改变电场强度和时间调度，可以精确地调整这种增强效果。我们证明了电场是一种新的参数，可以用来控制表面活性剂向微尺度流体-流体界面的传输。
