title: Internally structured pickering emulsions stabilized by clay mineral particles.
abstract: The present study aims to describe emulsion particles containing a dispersed phase composed of nanostructured lipid mesophases and stabilized by montmorillonite and/or Laponite clay platelets. The size distributions of these emulsion particles were found independent of the clay mineral content and of the initial internal composition that determines the internal structure. The stabilization of the droplets by a shell of smectite layers was found possible even by montmorillonite which has a length of the same order or more than the droplets to stabilize. The clay platelets give a local flatness to the droplets that may influence the internal structure. In this paper, we describe the conditions to obtain such soft particles of about 220 nm, and we show by direct visualization the internal mesophase complexity and the shape of the particles. In particular, TEM analysis showed elongated particles with bent-back channels at their center but a different morphology at the periphery due to flat border conditions imposed by the presence of the clay minerals.
authors.affiliation: Centre de Recherche sur la Matière Divisée, UMR 6619, Université d'Orléans-CNRS, 1b Rue de la Férollerie, F-45071 Orléans Cedex 2, France.
authors.forename: Samuel
authors.initials: S
authors.lastname: Guillot
authors.forename: Faïza
authors.initials: F
authors.lastname: Bergaya
authors.forename: Christine
authors.initials: C
authors.lastname: de Azevedo
authors.forename: Fabienne
authors.initials: F
authors.lastname: Warmont
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Tranchant
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D001546:Bentonite / Q000737:chemistry; D000077215:Clay; D004655:Emulsions / Q000737:chemistry*; D005614:Freeze Fracturing; D008055:Lipids / Q000737:chemistry*; D008854:Microscopy, Electron; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D017640:Silicates / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D000538:Aluminum Silicates; D004655:Emulsions; D008055:Lipids; D017640:Silicates; D001546:Bentonite; C524813:laponite; D000077215:Clay