L’équipe A2G du CERMAV a développé, par une chimie éco-responsable, un dérivé de sucre permettant la gélification de phases grasses. Ce travail présente un fort impact d’applications industrielles, notamment, en cosmétique.
Résumé :
« Supramolecular oleogels, in which low-molecular weight oleogelators self-assemble into various nanostructures through non-covalent interactions, have witnessed increasing research activity in various fields of science, including food, cosmetics or remediation of marine oil spills. Herein, we report a simple scalable and environmentally friendly carbohydrate-based oleogelator, namely, the sodium salt of N,N′-dimethyl β-C glucosyl barbiturate (GlcBMe) that self-assembles through sonication to induce the gelation of polar organic solvent and later of non-polar vegetable oils by cationic exchange with quaternary ammonium surfactants. Water-soluble GlcBMe was capable of forming self-assembled fibrillar network bridging insoluble particles in the oil by sonication in the presence of a small amount of water. The rheological properties are reinforced by in situ particle bridging with quaternary ammonium surfactants as evidenced by multi-scale structural analyses. IR analysis indicated that –OH (from carbohydrates) and -C=O (from barbituric ring) were involved in hydrogen bonding promoting the formation of a fibrous network. The oleogel presented a non-Newtonian system showing a shear-thinning behavior and thixotropic properties. Advantageously, these oleogels showed excellent control and slow release of the loaded-vitamin E in a pH-dependent manner. »
L’article est disponible en accès libre sur le site de l’éditeur : https://pubs.rsc.org/en/content/articlelanding/2025/ra/d4ra08087d
