Research Article
Acetylation of Wood Flour from Four Wood Species Grown in Nigeria Using Vinegar and Acetic Anhydride
Table 1
Assignment of the IR spectra bands of functional groups in acetylated wood flour treated with acetic anhydride.
| Band position (cm−1) | Functional group |
| 3973–3352 | –OH bonded stretching vibrations | 1746–1731 | C=O stretching vibrations of acetate group | 2938–2917 | C–H methyl and methylene group | 1373–1369 | (–C–CH3–) in acetate group due to acetylation | 1285–1241 |
() stretching band vibrations of the acetyl moieties | 1628–1618 | –OH of absorbed water | 1527–1511 | (C=C), aromatic skeletal absorption caused by lignin | 1044–1042 | C–O stretching vibrations in cellulose, hemicelluloses, and primary alcohol | 1052 | C–O stretching in acetyl (covalence vibration) | 620–603 | C–H out-of-plane stretching absorption of aromatic ring vibrations caused by lignin |
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