Diffusiophoresis of concentrated suspensions of spherical particles with identical ionic diffusion velocities

Journal of Colloid and Interface Science
James LouEric Lee

Abstract

Diffusiophoresis of concentrated suspensions of spherical particles subject to a small electrolyte gradient is analyzed theoretically at arbitrary levels of zeta potential and double-layer thickness. The Kuwabara unit cell model is adopted to describe the system under consideration. The effect of double-layer polarization is taken into account. It is found that the diffusiophoretic mobility exhibits a local maximum as well as a local minimum with varying zeta potential or double-layer thickness, similar to the corresponding dilute dispersion. The direction of the particle movement may even change back and forth. The previous low-zeta-potential approach is found to significantly overestimate the diffusiophoretic mobility as the zeta potential goes high. The deviation may be several fold sometimes. The effect of the volume fraction ratio of colloids is also examined. The higher the ratio, the lower the mobility.

References

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Jan 13, 2000·Journal of Colloid and Interface Science·H J Keh, J H Hsu
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Citations

Dec 3, 2014·Journal of Colloid and Interface Science·Shiojenn TsengJyh-Ping Hsu
Oct 23, 2012·Journal of Colloid and Interface Science·Hsuan-Pei Hsu, Eric Lee
Nov 26, 2009·Journal of Colloid and Interface Science·Jyh-Ping HsuShiojenn Tseng
Dec 3, 2014·Advances in Colloid and Interface Science·Emiliy K ZholkovskijMykola P Bondarenko
Aug 25, 2015·Journal of Colloid and Interface Science·William Fang, Eric Lee
Jan 16, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Yu-Fan LeeEric Lee
Jan 7, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Jyh-Ping HsuZheng-Syun Chen
Jun 19, 2009·The Journal of Physical Chemistry. B·Xiaogang ZhangShiojenn Tseng
Feb 11, 2010·The Journal of Physical Chemistry. B·Jyh-Ping HsuShiojenn Tseng
Feb 5, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Shan-Chi Tsai, Eric Lee
Feb 24, 2007·The Journal of Physical Chemistry. B·Jyh-Ping HsuEric Lee

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