Effective charges and zeta potentials of oil in water microemulsions in the presence of Hofmeister salts
Abstract
We present a theory which allows us to calculate the effective charge and zeta potential of oil droplets in microemulsions containing Hofmeister salts. A modified Poisson-Boltzmann equation is used to account for the surface and ion polarizations and hydrophobic and dispersion interactions. The ions are classified as kosmotropes and chaotropes according to their Jones-Dole viscosity B coefficient. Kosmotropes stay hydrated and do not enter into the oil phase, while chaotropes can adsorb to the oil-water interface. The effective interaction potentials between ions and oil-water interface are parametrized so as to accurately account for the excess interfacial tension.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 16, 2018
- Source ID
- 10.1063/1.5019704
Entities
People
- Alexandre P dos Santos
- Yan Levin
Organizations
- Alexander von Humboldt Foundation
- Coordenação de Aperfeicoamento de Pessoal de Nível Superior
- Federal University of Rio Grande do Sul
- Freie Universität Berlin
- National Council for Scientific and Technological Development
- United States Air Force