Titre: New Materials Chemistry from Cellulose Nanocrystals
Endroit: Pavillion P. J. Bombardier, salle 1035
Hôte: Wust James D.
Résumé: Cellulose nanocrystals (CNCs) extracted from biomass, including cotton and wood pulp, form stable colloidal suspensions in water and also organize into a chiral nematic liquid crystal when concentrated in water. This chiral nematic organization is retainedin dried films of CNCs, giving films with bright, iridescent colors.Our group has been active in using CNCs as a template to construct novel chiral nematic mesoporous materials with photonic properties. We have succeeded in preparing silica,organosilica, and polymeric materials through self-assembly or templating methods.In this presentation, I will discuss our some of our recent explorations with CNCs, including hydrogels (Fig. 1) and aerogels, tactoids,[7,8]or elastomers with tunable optical properties.