Dilute Alkali and Hydrogen Peroxide Treatment of Microwave Liquefied Rape Straw Residue for the Extraction of Cellulose Nanocrystals

Figure 2

FT-IR transmittances of liquefied residues from different liquefactions: (a) raw rape straw; (b) 140°C/15 min; (c) 160°C/15 min; (d) 180°C/7.5 min; (e) 180°C/10 min; (f) 180°C/15 min (other conditions: methanol/rape straw, 6/1; sulfuric acid, 3%).