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@ARTICLE{Roa:190046,
author = {Roa, Rafael and Zholkovskiy, Emiliy K. and Naegele,
Gerhard},
title = {{U}ltrafiltration modeling of non-ionic microgels},
journal = {Soft matter},
volume = {11},
number = {20},
issn = {1744-6848},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2015-03005},
pages = {4106-4122},
year = {2015},
abstract = {Membrane ultrafiltration (UF) is a pressure driven process
allowing for the separation and enrichment of protein
solutions and dispersions of nanosized microgel particles.
The permeate flux and the near-membrane
concentration-polarization (CP) layer in this process is
determined by advective-diffusive dispersion transport and
the interplay of applied and osmotic transmembrane pressure
contributions. The UF performance is thus strongly dependent
on the membrane properties, the hydrodynamic structure of
the Brownian particles, their direct and hydrodynamic
interactions, and the boundary conditions. We present a
macroscopic description of cross-flow UF of non-ionic
microgels modeled as solvent-permeable spheres. Our
filtration model involves recently derived semi-analytic
expressions for the concentration-dependent collective
diffusion coefficient and viscosity of permeable particle
dispersions [Riest et al., Soft Matter, 2015, 11, 2821].
These expressions have been well tested against computer
simulation and experimental results. We analyze the CP layer
properties and the permeate flux at different operating
conditions and discuss various filtration process efficiency
and cost indicators. Our results show that the proper
specification of the concentration-dependent transport
coefficients is important for reliable filtration process
predictions. We also show that the solvent permeability of
microgels is an essential ingredient to the UF modeling. The
particle permeability lowers the particle concentration at
the membrane surface, thus increasing the permeate flux.},
cin = {ICS-3},
ddc = {530},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
SFB 985 B06 - Kontinuierliche Trennung und Aufkonzentrierung
von Mikrogelen (B06) (221475706)},
pid = {G:(DE-HGF)POF3-551 / G:(GEPRIS)221475706},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000354449100018},
pubmed = {pmid:25921331},
doi = {10.1039/C5SM00678C},
url = {https://juser.fz-juelich.de/record/190046},
}