(485d) Diffusiophoretic Velocity for Mixture of Electrolytes with Asymmetric Ion Valences
AIChE Annual Meeting
2019 AIChE Annual Meeting
Engineering Sciences and Fundamentals
Soft Matter Electrokinetics
Wednesday, November 13, 2019 - 8:45am to 9:00am
Diffusiophoresis is the relative movement between a charged surface and a surrounding electrolyte due to electrolyte concentration gradient. In the literature, the diffusiophoretic velocity has been derived for a single valence-symmetric (or z : z) electrolyte. Here, we extend the previous analyses and report diffusiophoretic velocity for a mixture of electrolytes with arbitrary ion valences, without imposing a restriction on zeta potential. We demonstrate that the asymmetry in ion valences could be exploited to tune diffusiophoretic motion. We also discuss broader implications of our results in time-dependent systems consisting of multiple electrolytes.