The bands at 1421, 1369, 1315, and
1234 cm-1 originate from CH2 scissoring, C–H stretch in
CH3, CH2 rocking vibration, and C–O–C stretching. The
C–O–C pyranose ring skeletal vibration gives a prominent
band at 1029 cm-1. A small sharp peak at 891 cm-1 corresponds
to the glycosidic C1–H deformation with ring
vibration contribution, which is characteristic of b-glycosidic
linkages between glucose in cellulose [38].