Facile Extraction of Thermally Stable and Dispersible Cellulose Nanocrystals with High Yield via a Green and Recyclable FeCl₃-Catalyzed Deep Eutectic Solvent System

In the current work, a green and recyclable FeCl3-catalyzed deep eutectic solvent system (F-DES) was invented to fabricate cellulose nanocrystals (CNCs) with a high yield and excellent thermal stability. It was found that the optimum composition of the FeCl3-catalyzed deep eutectic solvent was composed of oxalic acid dihydrate (Oxd), choline chloride (ChCl), and FeCl3·6H2O in a mass ratio of 4:1:0.2 (corresponding to the molar ratio of...