Dielectric analysis based on spherical-shell model for cationic and anionic spherical polyelectrolyte brushes

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Xiaoxia Guo, Kong-Shuang Zhao

Abstract

We report here a dielectric study on cationic and anionic spherical polyelectrolyte brush (SPB) (consisting of a polystyrene (PS) core and poly (2-aminoethylmethacrylate hydrochloride (PAEMH) chains or poly (acrylic acid) (PAA) chains grafted onto the core) suspensions over a frequency range of 40 Hz-110 MHz. The relaxation behavior of the suspensions shows significant changes in the brush layer properties when changing the particle mass fraction or pH of the system. After eliminating the electrode polarization effect at a low frequency, two definite relaxations related to interfacial polarization, around 100 kHz and 10 MHz respectively, are observed. Based on a single layer spherical-shell model, we developed a curve-fitting procedure to analyze such dielectric spectra for soft particles, and then calculated the dielectric properties of the components of the SPBs (such as the permittivities and conductivities of the layer and solution phase), especially the layer thickness d s of the polyelectrolyte chain (PE) layer. We also found a larger confinement degree of counterions in the PAEMH brush due to the protonation of the amino group. Moreover, the repulsive force between the SPB particles is evaluated by using the d s combined...Continue Reading

References

Jan 1, 1989·Annual Review of Biophysics and Biophysical Chemistry·S McLaughlin
Sep 14, 1999·Klinische Monatsblätter für Augenheilkunde·C Distler, K P Hoffmann
Dec 12, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·X Guo, M Ballauff
May 4, 2004·Journal of Colloid and Interface Science·Stanislav S DukhinCarsten Werner
Aug 18, 2004·Journal of Colloid and Interface Science·Lee P Yezek, Herman P van Leeuwen
Apr 20, 2005·The Journal of Chemical Physics·V Ballenegger, J-P Hansen
Apr 6, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Jérôme F L Duval, Hiroyuki Ohshima
Jul 21, 2006·The Journal of Physical Chemistry. B·Constantino Grosse, Viviana Zimmerman
Feb 3, 2007·The Journal of Physical Chemistry. B·Stanislav S DukhinCarsten Werner
Apr 18, 2008·Journal of Colloid and Interface Science·Hiroyuki Ohshima
May 4, 2010·Advanced Materials·Andrés Guerrero-MartínezLuis M Liz-Marzán
Sep 28, 2010·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Christian SchneiderMatthias Ballauff
Nov 1, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Silvia AhualliMaría L Jiménez
May 20, 2014·Colloids and Surfaces. B, Biointerfaces·Koji Asami
Jul 15, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Haiyan Wu, Kongshuang Zhao
Dec 29, 2009·Science and Technology of Advanced Materials·Hiroyuki Ohshima
Apr 26, 2011·Science and Technology of Advanced Materials·Kimiko Makino, Hiroyuki Ohshima

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Citations

Jan 17, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Wantong LiYang Li

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