Title
Nano-particle dynamics during capillary suction
Author
Kuijpers, C.J.
Huinink, H.P.
Tomozeiu, N.
Erich, S.J.F.
Adan, O.C.G.
Publication year
2018
Abstract
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 Al2O3 samples of varying pore size is measured using NMR imaging. The liquid and particle front can be measured by utilizing T2 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 Fe2O3 nanoparticles on sintered Al2O3 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. © 2018 Elsevier Inc.
Subject
Darcy's law
Fe2O3 nanoparticles
NMR imaging
Particle adsorption
Porous media
Sintered Al2O3
Alumina
Aluminum compounds
Flow of fluids
Groundwater flow
Iron compounds
Liquids
Magnetic resonance imaging
Mixtures
Pore size
Porous materials
Seepage
Sintering
Accurate prediction
Capillary transport
Darcy's law
One-dimensional model
Particle adsorption
Particle retention
Penetration process
Nanoparticles
To reference this document use:
http://resolver.tudelft.nl/uuid:26fed668-15e3-47bb-82fd-709082641435
DOI
https://doi.org/10.1016/j.jcis.2018.03.023
TNO identifier
788249
ISSN
0021-9797
Source
Journal of Colloid and Interface Science, 521, 69-80
Document type
article