Application of Carboxymethyl Chitosan-Benzaldehyde as Anticorrosion Agent on Steel

Table 1

Analysis of functional groups of chitosan and CMC using FTIR.

Functional groups	Wave numbers according to Zheng et al. [7] (cm^−1)	Wave numbers of chitosan (cm^−1)	Wave numbers of CMC from the synthesis results (cm^−1)
C-O stretch	1030–1094	1033.77–1083.92	1033.77–1081.99
Bridge-O stretch	1153	1153.35	1151.42
N-H bending	1556	1421.44	1598.88
C-H stretch	2881	2883.38	2889.17
O-H stretch	3421	3440.77	3434.98
COO^−	1407–1598	-	1407.94