Decreased Interfacial Tension of Demixed Aqueous Polymer Solutions due to Charge

Physical Review Letters
Mark VisR Hans Tromp

Abstract

Electric charge at the water-water interface of demixed solutions of neutral polymer and polyelectrolyte decreases the already ultralow interfacial tension. This is demonstrated in experiments on aqueous mixtures of dextran (neutral) and nongelling fish gelatin (charged). Upon phase separation, electric charge and a potential difference develop spontaneously at the interface, decreasing the interfacial tension purely electrostatically in a way that can be accounted for quantitatively by Poisson-Boltzmann theory. Interfacial tension is a key property when it comes to manipulating the water-water interface, for instance to create novel water-in-water emulsions.

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Citations

Jun 5, 2018·Physical Review Letters·Louis KealCécile Monteux
Feb 13, 2020·Physical Chemistry Chemical Physics : PCCP·Amber R TitusBoris Y Zaslavsky
Nov 8, 2016·Physical Chemistry Chemical Physics : PCCP·R Hans TrompMark Vis
Nov 22, 2019·Chemical Society Reviews·Youchuang Chao, Ho Cheung Shum
Feb 22, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Youchuang ChaoHo Cheung Shum
Sep 23, 2020·The Journal of Physical Chemistry Letters·Mark VisRemco Tuinier
Dec 20, 2017·The Journal of Physical Chemistry. B·Mark VisHenk N W Lekkerkerker

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