Equilibrium properties of charged microgels: A Poisson-Boltzmann-Flory approach

Autor(en)

Thiago Colla, Christos N. Likos, Yan Levin

Abstrakt

The equilibrium properties of ionic microgels are investigated using a combination of the Poisson-Boltzmann and Flory theories. Swelling behavior, density profiles, and effective charges are all calculated in a self-consistent way. Special attention is given to the effects of salinity on these quantities. In accordance with the traditional ideal Donnan equilibrium theory, it is found that the equilibrium microgel size is strongly influenced by the amount of added salt. Increasing the salt concentration leads to a considerable reduction of the microgel volume, which therefore releases its internal material – solvent molecules and dissociated ions – into the solution. Finally, the question of charge renormalization of ionic microgels in the context of the cell model is briefly addressed.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Universidade Federal do Rio Grande do Sul, Universität Wien

Journal

Journal of Chemical Physics

Band

141

Anzahl der Seiten

11

ISSN

0021-9606

DOI

https://doi.org/10.1063/1.4903746

Publikationsdatum

12-2014

Peer-reviewed

Ja

ÖFOS 2012

103036 Theoretische Physik, 103023 Polymerphysik

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie, Physical and Theoretical Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/1a7c92eb-9b2b-480b-84ac-56e5e5b016c4