title: Self-Assembling Behavior of Glycerol Monoundecenoate in Water.
abstract: The self-assembling properties of glycerol esters in water are well known. Still, few data on glycerol monoesters of undecylenic acid are available. The aim of this study was to highlight the behavior of glycerol monoundecenoate (GM-C11:1) in different diluted and concentrated states. Its self-assembling properties in water and upon solid inorganic surfaces were investigated in the diluted state using surface tension experiments, atomic force microscopy, and cryogenic transmission electron microscopy studies. In the concentrated state, the gelling properties in the presence of water were investigated using polarized light microscopy, differential scanning calorimetry (DSC), and small-angle X-ray scattering (SAXS) experiments. GM-C11:1 at 100 mg/L self-assembles at the liquid/air interfaces as aggregates of approximately 20 nm in diameter, organized into concentric forms. These aggregates are spherical globules composed of several molecules of GM-C11:1. At higher concentrations (1000 and 104mg/L), GM-C11:1 is able to uniformly coat liquid/air and liquid/solid interfaces. In bulk, GM-C11:1 forms spontaneously aggregates and vesicles. In a more concentrated state, GM-C11:1 assembles into lamellar Lβand Lαforms in water. By cross-referencing SAXS and DSC findings, we were able to distinguish between interlamellar water molecules strongly bound to GM-C11:1 and other molecules remaining unbound and considered to be "mobile" water. The percentage of water strongly bound was proportional to the percentage of GM-C11:1 in the system. In this case, GM-C11:1 appears to be an effective molecule for surface treatments for which water retention is important.
authors.affiliation: Laboratoire de Chimie Agro-Industrielle (LCA), Université de Toulouse, INRA, INPT , 31030 Toulouse, France.
authors.forename: Gildas
authors.initials: G
authors.lastname: Nyame Mendendy Boussambe
authors.affiliation: Laboratoire de Chimie Agro-Industrielle (LCA), Université de Toulouse, INRA, INPT , 31030 Toulouse, France.
authors.forename: Romain
authors.identifier: 0000-0002-5789-0740
authors.initials: R
authors.lastname: Valentin
authors.affiliation: Laboratoire de Chimie Agro-Industrielle (LCA), Université de Toulouse, INRA, INPT , 31030 Toulouse, France.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Fabre
authors.affiliation: Centre de Recherche Paul-Pascal, CNRS, Université de Bordeaux , 33600 Pessac, France.
authors.forename: Laurence
authors.initials: L
authors.lastname: Navailles
authors.affiliation: Centre de Recherche Paul-Pascal, CNRS, Université de Bordeaux , 33600 Pessac, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Nallet
authors.affiliation: UR 1268 Biopolymères Interactions et Assemblages, INRA , rue de la Géraudière, 44316 Nantes, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Gaillard
authors.affiliation: Laboratoire de Chimie Agro-Industrielle (LCA), Université de Toulouse, INRA, INPT , 31030 Toulouse, France.
authors.forename: Zéphirin
authors.initials: Z
authors.lastname: Mouloungui
mesh_terms: D005229:Fatty Acids, Monounsaturated / Q000138:chemical synthesis / Q000737:chemistry*; D005990:Glycerol / Q000138:chemical synthesis / Q000737:chemistry*; D015394:Molecular Structure; D014867:Water / Q000737:chemistry*
chemical_list: D005229:Fatty Acids, Monounsaturated; D014867:Water; D005990:Glycerol