Conditions for equilibrium solid-stabilized emulsions

Daniela J. Kraft, Julius W J De Folter, Bob Luigjes, Sonja I R Castillo, Stefano Sacanna, Albert P. Philipse, Willem K. Kegel

Research output: Contribution to journalArticle

Abstract

Particular types of solid-stabilized emulsions can be thermodynamically stable as evidenced by their spontaneous formation and monodisperse droplet size, which only depends on system parameters. Here, we investigate the generality of these equilibrium solid-stabilized emulsions with respect to the basic constituents: aqueous phase with ions, oil, and stabilizing particles. From systematic variations of these constituents, we identify general conditions for the spontaneous formation of monodisperse solid-stabilized emulsions droplets. We conclude that emulsion stability is achieved by a combination of solid particles as well as amphiphilic ions adsorbed at the droplet surface, and low interfacial tensions of the bare oil-water interface of order 10 mN/m or below. Furthermore, preferential wetting of the colloidal particles by the oil phase is necessary for thermodynamic stability. We demonstrate the sufficiency of these basic requirements by extending the observed thermodynamic stability to emulsions of different compositions. Our findings point to a new class of colloid-stabilized meso-emulsions with a potentially high impact on industrial emulsification processes due to the associated large energy savings.

Original languageEnglish (US)
Pages (from-to)10347-10356
Number of pages10
JournalJournal of Physical Chemistry B
Volume114
Issue number32
DOIs
StatePublished - Aug 19 2010

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Emulsions
emulsions
Oils
oils
Thermodynamic stability
Ions
thermodynamics
Emulsification
Colloids
wetting
Surface tension
colloids
Wetting
Energy conservation
interfacial tension
ions
requirements
Water
Chemical analysis
water

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

Kraft, D. J., De Folter, J. W. J., Luigjes, B., Castillo, S. I. R., Sacanna, S., Philipse, A. P., & Kegel, W. K. (2010). Conditions for equilibrium solid-stabilized emulsions. Journal of Physical Chemistry B, 114(32), 10347-10356. https://doi.org/10.1021/jp102659b

Conditions for equilibrium solid-stabilized emulsions. / Kraft, Daniela J.; De Folter, Julius W J; Luigjes, Bob; Castillo, Sonja I R; Sacanna, Stefano; Philipse, Albert P.; Kegel, Willem K.

In: Journal of Physical Chemistry B, Vol. 114, No. 32, 19.08.2010, p. 10347-10356.

Research output: Contribution to journalArticle

Kraft, DJ, De Folter, JWJ, Luigjes, B, Castillo, SIR, Sacanna, S, Philipse, AP & Kegel, WK 2010, 'Conditions for equilibrium solid-stabilized emulsions', Journal of Physical Chemistry B, vol. 114, no. 32, pp. 10347-10356. https://doi.org/10.1021/jp102659b
Kraft DJ, De Folter JWJ, Luigjes B, Castillo SIR, Sacanna S, Philipse AP et al. Conditions for equilibrium solid-stabilized emulsions. Journal of Physical Chemistry B. 2010 Aug 19;114(32):10347-10356. https://doi.org/10.1021/jp102659b
Kraft, Daniela J. ; De Folter, Julius W J ; Luigjes, Bob ; Castillo, Sonja I R ; Sacanna, Stefano ; Philipse, Albert P. ; Kegel, Willem K. / Conditions for equilibrium solid-stabilized emulsions. In: Journal of Physical Chemistry B. 2010 ; Vol. 114, No. 32. pp. 10347-10356.
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