Organogels from trehalose difatty esters amphiphiles

Geoffrey Hibert (1, 2, 3) , Martin Fauquignon (1, 3) , Jean-François Le Meins (1, 3) , Didier Pintori (4) , Etienne Grau (1, 2) , Sébastien Lecommandoux (1, 3) , Henri Cramail (1, 2)

1 LCPO - Laboratoire de Chimie des Polymères Organiques
2 Team 2 LCPO : Biopolymers & Bio-sourced Polymers
3 Team 3 LCPO : Polymer Self-Assembly & Life Sciences
4 ITERG - Institut des Corps Gras

Saccharide diesters have been recently shown to be excellent gelators of vegetable oils. In this paper, different fatty acid trehalose diesters were synthesized by a selective enzymatic transesterification performed only on the primary hydroxyl group of the trehalose. The resulting trehalose diesters demonstrated their ability to self-assemble in a large variety of edible vegetable oils with a minimum gelation concentration of 0.25 wt%/v. Microscopic analysis and X-ray scattering studies indicate that the gels are obtained by the self-assembly of trehalose diesters in crystalline fibers constituting the tridimensional network. The rheological study revealed that the properties of the gels depend on the kind of fatty acid grafted on the trehalose but are also influenced by the vegetable oil composition.

Mots clés: Organogelator; glycolipid

Domaines: Matière Molle [cond-mat.soft]; Science des matériaux [cond-mat.mtrl-sci]; Matériaux

Geoffrey Hibert, Martin Fauquignon, Jean-François Le Meins, Didier Pintori, Etienne Grau, et al.. Organogels from trehalose difatty esters amphiphiles. Soft Matter, 2019, 15 (1), pp.956-962. ⟨10.1039/C8SM02244E⟩. ⟨hal-01981715⟩