TY - JOUR
T1 - Surface tension between liquids containing antagonistic and regular salts
AU - Kroll, Roni
AU - Gottlieb, Moshe
AU - Tsori, Yoav
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - Abstract: We investigate theoretically the surface tension between two immiscible liquids containing antagonistic and regular salts. The mean-field model includes the electrostatic energy and the Gibbs transfer energy of the ions. We find the Donnan potential difference between the liquids and solve the Poisson–Boltzmann equation to calculate the potential and ion density profiles. When the liquids contain only a regular salt, the surface tension increases when compared to the no-salt case; in contrast, the surface tension is reduced when they contain only an antagonistic salt. When both salts are present, the surface tension can either further decrease or increase depending on the preferential solvation of the ions, in agreement with published experimental observations. Graphic Abstract: [Figure not available: see fulltext.].
AB - Abstract: We investigate theoretically the surface tension between two immiscible liquids containing antagonistic and regular salts. The mean-field model includes the electrostatic energy and the Gibbs transfer energy of the ions. We find the Donnan potential difference between the liquids and solve the Poisson–Boltzmann equation to calculate the potential and ion density profiles. When the liquids contain only a regular salt, the surface tension increases when compared to the no-salt case; in contrast, the surface tension is reduced when they contain only an antagonistic salt. When both salts are present, the surface tension can either further decrease or increase depending on the preferential solvation of the ions, in agreement with published experimental observations. Graphic Abstract: [Figure not available: see fulltext.].
UR - http://www.scopus.com/inward/record.url?scp=85178208531&partnerID=8YFLogxK
U2 - 10.1140/epje/s10189-023-00378-4
DO - 10.1140/epje/s10189-023-00378-4
M3 - Article
C2 - 38019306
AN - SCOPUS:85178208531
SN - 1292-8941
VL - 46
JO - European Physical Journal E
JF - European Physical Journal E
IS - 11
M1 - 116
ER -