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      Viscoelastic Properties of Polyelectrolyte Multilayers Swollen with Ionic Liquid Solutions

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          Abstract

          Polyelectrolyte multilayers (PEM) obtained by layer-by-layer assembly can be doped with ionic liquid (IL) via the swelling of the films with IL solutions. In order to examine the mechanical properties of IL-containing PEM, we implement a Kelvin-Voigt model to obtain thickness, viscosity and elastic modulus from the frequency and dissipation shifts determined by a dissipative quartz crystal microbalance (QCM-D). We analyze the changes in the modeled thickness and viscoelasticity of PEI(PSS/PADMAC) 4PSS and PEI(PSS/PAH) 4PSS multilayers upon swelling by increasing the concentration of either 1-Ethyl-3-methylimidazolium chloride or 1-Hexyl-3-methylimidazolium chloride, which are water soluble ILs. The results show that the thickness of the multilayers changes monotonically up to a certain IL concentration, whereas the viscosity and elasticity change in a non-monotonic fashion with an increasing IL concentration. The changes in the modeled parameters can be divided into three concentration regimes of IL, a behavior specific to ILs (organic salts), which does not occur with swelling by simple inorganic salts such as NaCl. The existence of the regimes is attributed to a competition of the hydrophobic interactions of large hydrophobic ions, which enhance the layer stability at a low salt content, with the electrostatic screening, which dominates at a higher salt content and causes a film softening.

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          Verwendung von Schwingquarzen zur W�gung d�nner Schichten und zur Mikrow�gung

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            Buildup of ultrathin multilayer films by a self-assembly process, 1 consecutive adsorption of anionic and cationic bipolar amphiphiles on charged surfaces

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              • Record: found
              • Abstract: not found
              • Article: not found

              pH-Dependent Thickness Behavior of Sequentially Adsorbed Layers of Weak Polyelectrolytes

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                Author and article information

                Journal
                Polymers (Basel)
                Polymers (Basel)
                polymers
                Polymers
                MDPI
                2073-4360
                01 August 2019
                August 2019
                : 11
                : 8
                Affiliations
                [1 ]Institute of Physical Chemistry, University of Muenster, 48149 Münster, Germany
                [2 ]NRW Graduate School of Chemistry, University of Muenster, 48149 Münster, Germany
                [3 ]Interdisciplinary Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles, 1050 Brussels, Belgium
                Author notes
                Article
                polymers-11-01285
                10.3390/polym11081285
                6722675
                31374899
                © 2019 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

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