Chun, MS Kim, SI Park, OO 2024-01-21T10:32:44Z 2024-01-21T10:32:44Z 2021-09-01 2002-06-24 0927-7757 https://pubs.kist.re.kr/handle/201004/139430 In the confined space of narrow channels, the behavior of rodlike polyelectrolytes pertaining to anisotropic configuration effect is much different than in the bulk. Based on our previous study, we analyzed on the orientational order of rodlike polyelectrolyte in dilute suspensions under the action of the long-range colloidal interactions, which results in the concentration depletion near the solid surface. For the orientation of rodlike polyelectrolytes existing near the charged wall, the electrostatic repulsive interaction explicitly creates the preferential alignment of rod segments perpendicular to the surface, while the parallel alignment is favored without this interaction. The concentration-depleted layer thickness, in which the perpendicular orientation of the rods is predicted, increases either with decreased solution ionic strength or with increased surface potentials of the wall and the rod. The partition coefficient determined from the concentration profile presents the fact that the rod is more excluded by electrostatic and entropic effects with the increase of confining strength. It is evident that the presence of electrostatic interactions changes the partitioning behavior of rodlike polyelectrolyte suspension in the dilute limit. (C) 2002 Elsevier Science B.V. All rights reserved. English ELSEVIER SCIENCE BV SPHERICAL COLLOIDS BULK SOLUTION POROUS-MEDIA PORES MACROMOLECULES SIMULATION LAYERS WALL FLOW Orientation and partitioning behavior of dilute rodlike polyelectrolyte suspensions within confined slit microchannels Article 10.1016/S0927-7757(02)00026-2 1 COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.205, no.3, pp.261 - 271 COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 205 3 261 271 scie scopus 000176459900010 2-s2.0-0037166709 Chemistry, Physical Chemistry Article SPHERICAL COLLOIDS BULK SOLUTION POROUS-MEDIA PORES MACROMOLECULES SIMULATION LAYERS WALL FLOW confined spaces long-range interaction orientational order concentration partitioning rodlike polyelectrolytes