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@INPROCEEDINGS{Naegele:911665,
author = {Naegele, Gerhard},
title = {{D}eswelling, thermodynamics, structure, and dynamics in
ionic microgel suspensions},
reportid = {FZJ-2022-04920},
year = {2022},
abstract = {Suspensions of ionic microgels are of fundamental and
technological interest, owing to the sensitivity of the
microgel sizes to external control parameters such as
concentration, ionic strength and temperature. In this talk,
I report on a theoretical study of crowding effects on
thermodynamic, structural, and dynamic properties of
concentrated suspensions of ionic microgels, which gives new
insights into microgel deswelling effects.Methods for
calculating the crowding-dependent microgel radius are
discussed, used for the calculations of an effective
microgel pair potential from which thermodynamic, structural
and dynamic suspension properties are determined. It is
shown that deswelling mildly enhances self- and collective
diffusion and the osmotic pressure, lowers the suspension
viscosity, and significantly shifts the suspension
crystallization point to higher concentrations. In a
nutshell, a versatile bottom-up approach for computing
suspension properties of crowded ionic microgels is
presented based on the characteristics of single microgels.
If time suffices, I will also discuss pros and cons of
different colloidal charge-renormalization methods based on
the Primitive Model and Poisson-Boltzmann spherical cell
models, and the possible occurrence of an effective colloid
charge larger than the bare one.},
month = {Sep},
date = {2022-09-12},
organization = {CECAM workshop: Charged Species in
Bulk and Interfaces: Transport and
Regulation, Vienna, Austria, September
15 (2022), Vienna (Austria), 12 Sep
2022 - 16 Sep 2022},
subtyp = {Invited},
cin = {IBI-4},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5244 - Information Processing in Neuronal Networks
(POF4-524)},
pid = {G:(DE-HGF)POF4-5244},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/911665},
}