A Simple Method to Determine Critical Coagulation Concentration from Electrophoretic Mobility
1
Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, 30 Quai Ernest-Ansermet, 1205 Geneva, Switzerland
2
MTA-SZTE Lendület Biocolloids Research Group, Interdisciplinary Excellence Centre, Department of PhysicalChemistry and Materials Science, University of Szeged, 1 Rerrich Béla tér, H-6720 Szeged, Hungary
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Colloids Interfaces 2020, 4(2), 20; https://doi.org/10.3390/colloids4020020
Received: 27 March 2020
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Revised: 17 April 2020
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Accepted: 20 April 2020
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Published: 1 May 2020
(This article belongs to the Special Issue Ion Specific Effects in Colloid and Surface Science – Where Biology, Chemistry and Physics Meet)
Critical coagulation concentration (CCC) is a key parameter of particle dispersions, since it provides the threshold limit of electrolyte concentrations, above which the dispersions are destabilized due to rapid particle aggregation. A computational method is proposed to predict CCC values using solely electrophoretic mobility data without the need to measure aggregation rates of the particles. The model relies on the DLVO theory; contributions from repulsive double-layer forces and attractive van der Waals forces are included. Comparison between the calculated and previously reported experimental CCC data for the same particles shows that the method performs well in the presence of mono and multivalent electrolytes provided DLVO interparticle forces are dominant. The method is validated for particles of various compositions, shapes, and sizes.
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MDPI and ACS Style
Galli, M.; Sáringer, S.; Szilágyi, I.; Trefalt, G. A Simple Method to Determine Critical Coagulation Concentration from Electrophoretic Mobility. Colloids Interfaces 2020, 4, 20. https://doi.org/10.3390/colloids4020020
AMA Style
Galli M, Sáringer S, Szilágyi I, Trefalt G. A Simple Method to Determine Critical Coagulation Concentration from Electrophoretic Mobility. Colloids and Interfaces. 2020; 4(2):20. https://doi.org/10.3390/colloids4020020
Chicago/Turabian StyleGalli, Marco, Szilárd Sáringer, István Szilágyi, and Gregor Trefalt. 2020. "A Simple Method to Determine Critical Coagulation Concentration from Electrophoretic Mobility" Colloids and Interfaces 4, no. 2: 20. https://doi.org/10.3390/colloids4020020
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