The characteristic peaks of corn starch and the –C–O bond stretching of –C–O–H group appear at about 1156 and 1081 cm1
, respectively; the –C–O bond stretching of –C–O–C group in the anhydroglucose ring appears at about 1020 cm1 (Wang et al., 2008), and these peaks shift to lower wave numbers (around 1150, 1070 and 1012 cm1, respectively) in composite
films and become broader. The peak at 1160 cm1 belongs to the C–O stretching of cellulose (Kataoka and Kondo, 1998),
which is also broadened and shifted to 1150 and 1151 cm1 in the composites films.