Impact of Colloidal Stability on Cellulose Nanocrystals Self-Ordering in Thin Films

摘要

Sulfuric acid hydrolyzed cellulose nanocrystals(CNC)display interesting self-ordering properties in water.Applications include water casting of optically active CNCbased materials and composites.N,N-dimethylformamide(DMF)-cast materials do not display as good properties.Variations in CNC colloidal stability between water and DMF were proposed as an explanation for these behaviors.Here,we monitored the variations in optical properties of thin films cast from water,DMF,and their binary mixtures.Results are interpreted in light of the colloidal stability of CNC in these media.