Nano-particle dynamics during capillary suction.

Autor: Kuijpers CJ; Applied Physics Department, Eindhoven University of Technology, PO Box 513, 5600MB Eindhoven, The Netherlands., Huinink HP; Applied Physics Department, Eindhoven University of Technology, PO Box 513, 5600MB Eindhoven, The Netherlands. Electronic address: H.P.Huinink@tue.nl., Tomozeiu N; Applied Physics Department, Eindhoven University of Technology, PO Box 513, 5600MB Eindhoven, The Netherlands; A&PS, R&D Department, Océ Technology BV, PO Box 101, 5900 MA Venlo, The Netherlands., Erich SJF; Applied Physics Department, Eindhoven University of Technology, PO Box 513, 5600MB Eindhoven, The Netherlands; Organization of Applied Scientific Research, TNO The Netherlands, P.O. Box 49, 2600 AA Delft, The Netherlands., Adan OCG; Applied Physics Department, Eindhoven University of Technology, PO Box 513, 5600MB Eindhoven, The Netherlands; Organization of Applied Scientific Research, TNO The Netherlands, P.O. Box 49, 2600 AA Delft, The Netherlands.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2018 Jul 01; Vol. 521, pp. 69-80. Date of Electronic Publication: 2018 Mar 09.
DOI: 10.1016/j.jcis.2018.03.023
Abstrakt: Due to the increased use of nanoparticles in everyday applications, there is a need for theoretical descriptions of particle transport and attachment in porous media. It should be possible to develop a one dimensional model to describe nanoparticle retention during capillary transport of liquid mixtures in porous media. Water-glycerol-nanoparticle mixtures were prepared and the penetration process in porous Al 2 O 3 samples of varying pore size is measured using NMR imaging. The liquid and particle front can be measured by utilizing T 2 relaxation effects from the paramagnetic nanoparticles. A good agreement between experimental data and the predicted particle retention by the developed theory is found. Using the model, the binding constant for Fe 2 O 3 nanoparticles on sintered Al 2 O 3 samples and the maximum surface coverage are determined. Furthermore, we show that the penetrating liquid front follows a square root of time behavior as predicted by Darcy's law. However, scaling with the liquid parameters is no longer sufficient to map different liquid mixtures onto a single master curve. The Darcy model should be extended to address the two formed domains (with and without particles) and their interaction, to give an accurate prediction for the penetrating liquid front.
(Copyright © 2018 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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