2.3.3. DispersibilityStability of CNFs suspension was studied in a non-aqueousmedium to determine the efficiency of acetylation of nanofibers.For this purpose, the aqueous (1 wt%) suspensions of acetylatedand non-acetylated CNFs were prepared. Solvent exchange fromwater to acetone and ethanol was done using centrifugation. Thesuspensions were sonicated in order to disperse nanofibers thor-oughly and then allowed to stand at room temperature for 2 weeksbefore photographing.