A comprehensive methodology to study double emulsion stability

Leister N, Götz V, Bachmann SJ, Nachtigall S, Hosseinpour S, Peukert W, Karbstein H (2022)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2022

Journal

Journal of Colloid and Interface Science Elsevier

Book Volume: 630

Pages Range: 534-548

Journal Issue: Pt B

DOI: 10.1016/j.jcis.2022.10.119

Abstract

The stability of emulsions requires the fast formation of viscoelastic interfaces between water and oil phases. In double emulsions, two surfactant types (hydrophilic and lipophilic) are present and two interfacial films are involved. Understanding cooperative adsorption of these surfactants and its implication on properties of water/oil/water interfacial films will enable replacing the empirical methodologies used in designing double emulsion systems with a knowledge-based approach. The distribution of surfactants between the water/oil interfaces was investigated using single droplet diffusion experiments and simulation of equilibrium surfactant density profiles. The stability of the interfaces against coalescence was characterized by dye transport in a leach cell and coalescence time of single droplets in a model experiment. The conformation of the surfactants at an interface was then examined via surface rheology, sum frequency generation spectroscopy, and dissipative particle dynamics simulation. Two selected hydrophilic surfactants combined with a lipophilic surfactant induce very different properties at water/oil interfaces and different dye release behaviour from their corresponding double emulsions. Competitive adsorption of sodium dodecyl sulfate and lipophilic surfactant results in the improvement of encapsulation efficiency, elasticity of the interface, and resistance against coalescence due to the intercalation of surfactant alkyl chains into the oil chains.

Authors with CRIS profile

Vanessa Götz Lehrstuhl für Partikelsynthese (LFG) Saman Hosseinpour Lehrstuhl für Partikelsynthese (LFG) Wolfgang Peukert Lehrstuhl für Partikelsynthese (LFG)

Involved external institutions

Karlsruhe Institute of Technology (KIT) DE Germany (DE) BASF SE DE Germany (DE)

How to cite

APA:

Leister, N., Götz, V., Bachmann, S.J., Nachtigall, S., Hosseinpour, S., Peukert, W., & Karbstein, H. (2022). A comprehensive methodology to study double emulsion stability. Journal of Colloid and Interface Science, 630(Pt B), 534-548. https://doi.org/10.1016/j.jcis.2022.10.119

MLA:

Leister, Nico, et al. "A comprehensive methodology to study double emulsion stability." Journal of Colloid and Interface Science 630.Pt B (2022): 534-548.

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