Cellulose isolation and core-shell nanostructures of cellulose nanocrystals from chardonnay grape skins

► Successful isolation of pure cellulose from grape skins separated from chardonnay pomace by an effective five-step process. ► Cellulose nanocrystal (CNC) derivation from sulfuric acid hydrolysis of grape cellulose. ► Detailed characterization of the nanostructure of grape CNCs and elucidation of self-assembled spherical cellulose nano-rod core and nanoparticle shell nanostructures, resembling the appearance of grape bundles.