Chemical functional groups of extractives, cellulose and lignin extracted from Leucaena leucocephala bark

Rafidah Md Salim and Jahimin Asik and Mohd Sani Sarjadi (2021) Chemical functional groups of extractives, cellulose and lignin extracted from Leucaena leucocephala bark. Wood Science and Technology, 55. pp. 295-313. ISSN 1432-5225

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URL: https://link.springer.com/article/10.1007/s00226-0...

Abstract

Bark from trees is considered a worthless raw material. However, this resource could be economically beneficial if utilized efficiently due to its rich chemical compounds. In this study, an ethanol toluene-soluble extractive, alpha-cellulose and lignin obtained from Leucaena leucocephala bark were characterized to determine their chemical functional groups. Based on FTIR spectral analysis, the results indicated that the bands of the functional groups of the extractive from the original bark remain unchanged; however, the absorbance intensity was found to be weaker in the group frequency and fingerprint regions. Removal of extractive, pectin, hemicellulose and lignin from the bark indirectly increased the strong absorbance intensity of cellulose. Broad peaks of OH stretching found in all spectra were assigned to the presence of phenolic OH and aliphatic structures for extractive and aromatic structures of lignin. It was revealed that aromatic functional groups were mainly found in the extractive, while water, carbonyl and ether were the dominant groups in cellulose, and methyl, methylene, carbonyl and carboxyl groups were enriched in lignin.

Item Type:	Article
Keyword:	Bark , Functional groups , Extractives , Cellulose , Lignin
Subjects:	T Technology > TS Manufactures > TS1-2301 Manufactures > TS800-937 Wood technology. Lumber > TS920-937 Chemical processing of wood
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	SAFRUDIN BIN DARUN -
Date Deposited:	08 Sep 2021 14:28
Last Modified:	08 Sep 2021 14:28
URI:	https://eprints.ums.edu.my/id/eprint/28987

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