Comparison and Characterisation of Regenerated Chitosan from 1-Butyl-3-methylimidazolium Chloride and Chitosan from Crab Shells

Table 1

FTIR bands of CHT and regenerated CHT with assignments.

Wave number (cm^−1)	Vibrational assignments
3359	O–H and N–H stretch
2921 and 2878	C–H stretch
1641	Amide II and C–O stretch of acetyl group
1598	N–H stretching from amide I and amide II
1485–1380	Asymmetrical C–H bending of the group
1067	Asymmetric stretch C–O–C and C–N stretch
1029	O–bridge stretching of the glucosamine residue