Table 2.

FT-IR spectra data of the extracted and chemical treated fish tail palm fibre.

Wavelength range (cm−1)	Possible assignment	Types of fibre				Source
		RFT	SFT1%	SFT5%	SFT9%
3600–3000	O-H stretching H-bonded alcohol, water, phenols	3326	3322	3318	3314	Cellulose, hemicellulose, lignin
2500–3000	C-H stretching vibration in cellulose and hemicellulose	2924	2928	2927	2924	Cellulose, hemicellulose
2000–1693	=CO stretching vibration of carboxylic acid and ester groups of hemicellulose	1745	1754	1743	1744	Hemicellulose
1693–1607	absorbed water	1639	1643	1641	1637	Water
1607–1486	aromatic C C stretching in lignin	1588	1584	1586	1582	Lignin
1486–1395	CH2 bending	1460	1464	1460	1461	Cellulose
1395–1347	C-H bending	1376	1382	1372	1370	Cellulose
1347–1286	aromatic C—O bending	1313	1315	1313	1318	Lignin
1286–1184	-CO stretching of acetyl group	1242	–	–	–	Lignin
1140–912	C-O stretching vibration in cellulose	1029	1032	1029	1021	Cellulose, hemicellulose, lignin
912–840	β-Glucosidic linkage in cellulose	897	901	893	893	Cellulose