Influence of surfactant concentration on spontaneous emulsification kinetics - Aix-Marseille Université Access content directly
Journal Articles Langmuir Year : 2022

Influence of surfactant concentration on spontaneous emulsification kinetics

Abstract

The kinetics of spontaneous emulsification is investigated on aqueous pendant drops in paraffin oil. Optical microscopy in transmission mode is used for high-spatial-resolution image recording. The influence of a lipophilic surfactant (Span 80) and two water-soluble surfactants (CTAB and SDS) is investigated. As time runs, the drops interface turns opaque due to the formation of microstructures associated with spontaneous emulsification. The time evolution of this phenomenon is shown to depend upon temperature and surfactant concentration which leads to an overall shrinkage due to gradual water uptake and transport into paraffin oil. Spontaneous emulsification kinetics depends upon the chemical composition. Higher concentration of Span 80 and CTAB (resp. SDS) are shown to promote (resp. hinder) water transport. This work provides new insights into the understanding of spontaneous emulsification when combining the properties of non-ionic and ionic surfactants.
Fichier principal
Vignette du fichier
Paper_Spontaneous-Emulsification_re_soumis_round#2_final_changes_made.pdf (1.06 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03879303 , version 1 (30-11-2022)

Identifiers

  • HAL Id : hal-03879303 , version 1

Cite

R Toor, R Denoyel, L Liggieri, M Schmitt, M Antoni. Influence of surfactant concentration on spontaneous emulsification kinetics. Langmuir, 2022. ⟨hal-03879303⟩
39 View
23 Download

Share

Gmail Facebook X LinkedIn More