“…Surprisingly, a sharp vibrational peak at 1741 cm −1 characteristic of C O bonds appears again in WR-2 (90% cellulose), suggesting acetylation. Cellulose (and lignin) acetylation as a side reaction using [EMIM][OAc] has been previously reported (Ç etinkol et al, 2010;Hauru et al, 2013;Karatzos, Edye, & Wellard, 2012;King, Xie, Fiskari, & Kilpelaeinen, 2014;Köhler et al, 2007). This structural change will be revisited in the next section.…”