The electromagnetophoretic behavior of organic droplets in an electrolyte solution was investigated in a silica capillary cell using a superconducting bulk magnet (3.5 T) and a magnetic circuit (2.7 T). The initially dispersed emulsion droplets of dodecane migrated to the wall of the capillary, responding to the direction of an electric current, and coalesced to form smaller and larger droplets after some repeated migrations. When the electric current was applied continuously, the larger droplets became arranged with regular intervals on the wall, and smaller droplets rotated around the larger droplets. These interesting behaviors were analyzed while taking into account the local electric current density determined by the flow velocity of the ionic current around a droplet, which was lowest on the electrode sides of the droplet. The difference in the local electric current density generated the Lorentz-force difference in the medium, which lead to local microconvection around the droplet, and also the alignment of larger droplets by a repelling effect between the adjacent microconvections.
Electromagnetophoretic force working on polystyrene particles and dodecane droplets dispersed in electrolyte solutions in a fused silica capillary exhibited characteristic phenomena. The force applied on the carboxyl terminated polystyrene particles, which was bound to the polyacrylacid modified wall, could determine the dissociation force of the particles. It was found that the addition of some metal ions increased the binding force of the particles. On the other hand, the force applied to the dodecane droplets induced characteristic behavior named local electrophoretic convection in a capillary; smaller droplets circulated around a larger droplet in the medium. This phenomenon was analyzed in terms of the local current density difference around the larger droplet.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.