Particles with tunable wettability for solid-stabilized emulsions

Yukari Sakazaki, Véronique Schmitt, Ulf Olsson

Research output: Contribution to journalArticlepeer-review

4 Citations (SciVal)

Abstract

We demonstrate that the wettability of cosmetic grade, silica-coated titanium dioxide nanoparticles may be tuned by simply soaking them in a cyclic silicone oil. This allows for tuning the type of emulsion that they stabilize, from oil-in-water to water-in-oil. By analyzing the sedimentation of water-in-oil emulsions, the effect of the soaking time (wettability) on drop size and drop-drop interactions was investigated. From centrifugation experiments performed up to emulsion breakage, we obtain an effective water-oil interfacial tension for the particle-loaded interfaces, which indicate lateral particle-particle interactions. Finally, we demonstrate that the proposed particle functionalization is terminated upon addition of water followed by emulsification. In addition, it is irreversible and can be accelerated through heating.GRAPHICAL ABSTRACT (Figure presented.).

Original languageEnglish
Pages (from-to)219-230
JournalJournal of Dispersion Science and Technology
Volume40
Issue number2
Early online date2018
DOIs
Publication statusPublished - 2019

Subject classification (UKÄ)

  • Physical Chemistry

Keywords

  • Emulsion
  • Pickering emulsion
  • sedimentation
  • settling
  • solid stabilized emulsion

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