The weak help the strong: low molar mass organogelators harden bitumen
Résumé
Low molar mass organogelators (LMOG) can turn liquids into thermoreversible gels, because they self-assemble into a fibrous network. In contrast, using the same kind of low molar mass additives to harden materials, which are already solid-like on their own, has been hardly exploited. We show here that simple dicarboxylic acids are very efficient low molar mass organogelators (LMOG) for bitumen. Indeed, they increase the range of temperatures where the bitumen is a solid. Moreover, the hardness and elastic modulus of bitumen at room temperature are also improved. This concept of improving the mechanical properties of a solid with a LMOG can probably be applied to other materials. 2
Domaines
Matériaux
Origine : Fichiers produits par l'(les) auteur(s)
Loading...