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Outstanding Stability of Poorly-protected Pickering Emulsions

  • Mathieu Destribats
  • Serge Ravaine
  • Valérie Heroguez
  • Fernando Leal-Calderon
  • Véronique SchmittEmail author
Conference paper
Part of the Progress in Colloid and Polymer Science book series (PROGCOLLOID, volume 137)

Abstract

Pickering emulsions are surfactant-free emulsions, stabilized solely by colloidal particles. Most of these emulsions exhibit exceptionally high stability and bulk elasticity. In order to investigate the effect of interfacial particle interactions and structure on the emulsions properties, we synthesized particles (silica, core-shell latexes, neighborite cubes) whose interactions can be tuned by a composition variable (pH, ionic strength…) leading to stimulus-responsive materials. The systems could switch from kinetically stable to unstable on demand. Surprisingly, some kinetically stable emulsions were obtained at very low interfacial particle coverage. We demonstrate the generality of this phenomenology using different types of particles and we discuss the origin of the stabilization in the poorly-covered regime.

Keywords

emulsions solid stabilizers stability stimulus-responsive pH and salt sensitivity dipolar interactions 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Mathieu Destribats
    • 1
    • 3
  • Serge Ravaine
    • 1
  • Valérie Heroguez
    • 2
  • Fernando Leal-Calderon
    • 3
  • Véronique Schmitt
    • 1
    Email author
  1. 1.Centre de Recherche Paul PascalUniversité Bordeaux 1, UPR 8641-CNRSPessacFrance
  2. 2.Laboratoire de Chimie des Polymères OrganiquesUniversité Bordeaux 1, CNRS, ENSCBP UMR 5629PESSACFrance
  3. 3.TREFLEUniversité Bordeaux 1, CNRS UMR 8508TalenceFrance

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