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A Numerical Study on Electrophoresis of a Soft Particle with Charged Core Coated with Polyelectrolyte Layer
Abstract:Migration of a core-shell soft particle under the influence of an external electric field in an electrolyte solution is studied numerically. The soft particle is coated with a positively charged polyelectrolyte layer (PEL) and the rigid core is having a uniform surface charge density. The Darcy-Brinkman extended Navier-Stokes equations are solved for the motion of the ionized fluid, the non-linear Nernst-Planck equations for the ion transport and the Poisson equation for the electric potential. A pressure correction based iterative algorithm is adopted for numerical computations. The effects of convection on double layer polarization (DLP) and diffusion dominated counter ions penetration are investigated for a wide range of Debye layer thickness, PEL fixed surface charge density, and permeability of the PEL. Our results show that when the Debye layer is in order of the particle size, the DLP effect is significant and produces a reduction in electrophoretic mobility. However, the double layer polarization effect is negligible for a thin Debye layer or low permeable cases. The point of zero mobility and the existence of mobility reversal depending on the electrolyte concentration are also presented.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1129101Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 851
 JFL. Duval, and F. Gaboriaud, Progress in electrohydrodynamics of soft microbial particle interphases, Current Opinion in Colloid & Interface Science, 15(3):184-195,2010.
 X. Yang, S. Lin, and MR. Wiesner, Influence of natural organic matter on transport and retention of polymer coated silver nanoparticles in porous media, Journal of hazardous materials, 264:161-168,2014.
 DA. Saville, Electrokinetic properties of fuzzy colloidal particles, Journal of colloid and interface science, 222(1):137-145,2000.
 X. Yang, S. Lin, and MR. Wiesner, Electrosprayed core-shell nanoparticles of PVP and shellac for furnishing biphasic controlled release of ferulic acid, Colloid and Polymer Science, 292(9):2089-2096,2014.
 H. Ohshima, Modified Henry function for the electrophoretic mobility of a charged spherical colloidal particle covered with an ion-penetrable uncharged polymer layer, Journal of Colloid and Interface Science, 252(1):119-125,2002.
 H. Ohshima, Electrophoresis of soft particles: Analytic approximations, Electrophoresis, 27(3):526-533,2006.
 H. Ohshima, Electrokinetic phenomena of soft particles, Current Opinion in Colloid & Interface Science, 18(2):73-82,2013.
 J. L´opez-Voita, S. Mandal, A.V. Delgado, J.L. Toca-Herrera, M. M¨oller, F. Zanuttin, M. Balestrino and S. Krol, Electrophoretic characterization of gold nanoparticles functionalized with human serum albumin (HSA) and creatine, Journal of Colloid and Interface Science, 332(1):215-223,2009.
 JFL. Duval, and H. Ohshima Electrophoresis of diffuse soft particles, Langmuir, 22(8):3533-3546,2006.
 PP. Gopmandal, S. Bhattacharyya, and H. Ohshima Effect of core charge density on the electrophoresis of a soft particle coated with polyelectrolyte layer, Colloid and Polymer Science, 294(4):727-733,2016.
 RJ. Hill and DA. Saville, Exactsolutions of the full electrokinetic model for soft spherical colloids: Electrophoretic mobility, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 267(1):31-49,2005.
 RJ. Hill, DA. Saville, and WB. Russel, Electrophoresis of spherical polymer-coated colloidal particles, Journal of Colloid and Interface Science, 258(1):56-74,2003.
 JJ. L´opez-Garcıa, C. Grosse, and J. Horno, Numerical study of colloidal suspensions of soft spherical particles using the network method: 1. DC electrophoretic mobility, Journal of colloid and interface science, 265(2):327-340,2003.
 C. Cametti, Dielectric properties of soft-particles in aqueous solutions, Soft Matter, 7(12):5494-5506,2011.
 JP. Hsu, ZS. Chen, and S. Tseng, Effect of electroosmotic flow on the electrophoresis of a membrane-coated sphere along the axis of a cylindrical pore, The Journal of Physical Chemistry B, 113(21):7701-7708,2009.
 S. Tseng, JP. Hsu, HM. Lo, and LH. Yeh, Electrophoresis of a Soft Particle within a Cylindrical Pore: Polarization Effect with the Nonlinear Poisson- Boltzmann Equation, The Journal of Physical Chemistry B, 114(31):10114-10125,2010.
 X. Zhang, JP. Hsu, ZS. Chen, LH. Hsien, MH. Ku and S. Tseng, Electrophoresis of a charge-regulated soft sphere in a charged cylindrical pore, The Journal of Physical Chemistry B, 114(4):1621-1631,2010.
 KL. Liu, JP. Hsu, and S. Tseng Influence of membrane layer properties on the electrophoretic behavior of a soft particle, Electrophoresis, 32(21):3053-3061,2011.
 LH. Yeh, KY. Feng, JP. Hsu and S. Tseng, Influence of boundary on the effect of double-layer polarization and the electrophoretic behavior of soft biocolloids, Colloids and Surfaces B: Biointerfaces, 88(2):559-567,2011.
 CH. Chou, JP. Hsu, CC. Kuo, H. Ohshima, S. Tseng, and RM. Wu, Importance of the porous structure of a soft particle on its electrophoretic behavior, Colloids and Surfaces B: Biointerfaces, 93(41):154-160,2012.
 S. Tseng, JP. Hsu, HM. Lo, and LH. Yeh, Electrophoresis of a soft sphere in a necked cylindrical nanopore, Physical Chemistry Chemical Physics, 15(28):11758-11765,2013.
 AC. Barbati, and BJ. Kirby, Soft diffuse interfaces in electrokinetics–theory and experiment for transport in charged diffuse layers, Soft Matter, 8(41):10598-10613,2012.
 S. Raafatnia, O. Hickey, and C. Holm Mobility reversal of polyelectrolyte-grafted colloids in monovalent salt solutions, Physical review letters, 113(24):238301,2014.
 S. Bhattacharyya, and S. De Influence of rigid core permittivity and double layer polarization on the electrophoresis of a soft particle: A numerical study, Physics of Fluids (1994-present), 28(1):012001,2016.
 S. De, S. Bhattacharyya, and PP. Gopmandal Importance of core electrostatic properties on the electrophoresis of a soft particle, Physical Review E (1994-present), 94(2):022611,2016.
 M. Moussa, C. Caillet, R. M. Town, and JFL. Duval, Remarkable electrokinetic features of charge-stratified soft nanoparticles: Mobility reversal in monovalent aqueous electrolyte, Langmuir, 31(20):5656-5666,2015.