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Please use this identifier to cite or link to this item: https://scholars.lib.ntu.edu.tw/handle/123456789/410627
Title: Electrophoretic mobility of charged porous shells or microcapsules and electric conductivity of their dilute suspensions
Authors: Li W.C.
Keh H.J. 
Keywords: Effective electric conductivity;Electrophoresis;Permeable microcapsule;Porous shell
Issue Date: 2016
Journal Volume: 497
Start page/Pages: 154-166
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects 
Abstract: 
An analysis is presented for the electrophoresis and electric conduction in a dilute suspension of charged spherical porous shells or permeable microcapsules with electric double layers of arbitrary thickness in an electrolyte solution. With the assumption that the system is slightly perturbed from equilibrium, the linearized electrokinetic equations governing the ionic electrochemical potential energy and fluid velocity distributions are solved as series expansions in the small fixed charge density of the porous shells. Explicit formulas for the electrophoretic mobility of the porous shells and effective electric conductivity of the suspension are derived. Both the electrophoretic mobility and the effective conductivity decrease monotonically with a decrease in the relative thickness of the porous shells, but these decreases are not conspicuous until the porous shells are quite thin. When the fluid permeability of the porous shells is smaller or the electric double layers are thicker, the effect of this relative thickness on the electrophoretic mobility and effective conductivity becomes more significant. In the limiting case of zero inner radius of the porous shells, our formulas reduce to the corresponding results obtained for the electrophoresis and electric conduction in a suspension of charged porous spheres. ? 2016 Elsevier B.V..
URI: https://scholars.lib.ntu.edu.tw/handle/123456789/410627
ISSN: 09277757
DOI: 10.1016/j.colsurfa.2016.02.028
Appears in Collections:化學工程學系

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