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Influence of the Counterion Nature on the Stability Sequence of Hydrophobic Latex Particles

Trompette, Jean-Luc and Lahitte, Jean-François Influence of the Counterion Nature on the Stability Sequence of Hydrophobic Latex Particles. (2019) Journal of Physical Chemistry B, vol.123 (17). 1-7. ISSN 1520-6106

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Official URL: https://doi.org/10.1021/acs.jpcb.9b01226


The aggregation kinetics of negatively charged polystyrene latex particles in the presence of monovalent electrolytes have been investigated. The inferred coagulation critical concentrations were compared to establish the stability sequence. With the same representative co-ions, this sequence is reversed when using kosmotrope sodium and chaotrope potassium cations. The results have been ascribed to a variable competition of the co-ions toward the hydrophobic surface depending on the lyotropic nature of the associated counterion. They provide new insights into the implication of ionic specificity in the stability behavior of aqueous dispersions of charged colloids.

Item Type:Article
HAL Id:hal-02162138
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:21 Jun 2019 12:26

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