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Open Access item Chemical characterization of lignin and lipid fractions in kenaf bast fibers used for manufacturing high-quality papers

Authors:Gutiérrez Suárez, Ana
Rodríguez García, María Isabel
Río Andrade, José Carlos del
Keywords:Kenaf, Hibiscus cannabinus, Bast fibers, Lipids, Lignin, Acetylated lignin, Steroids
Issue Date:2004
Publisher:American Chemical Society
Citation:Journal of Agricultural and Food Chemistry 52: 4764-4773 (2004)
Abstract:The chemical composition of lignin and lipids of bast fibers from kenaf (Hibiscus cannabinus) used for high-quality paper pulp production was studied. Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) of fibers showed a lignin with high syringyl:guaiacyl ratio (5.4) and minor amounts of p-hydroxyphenyl units. Simultaneously, sinapyl and coniferyl acetates were also identified, indicating that this lignin is partially acetylated. p-Hydroxycinnamic acids were only found in trace amounts. The main lipids identified by GC/MS of extracts from kenaf fibers were series of long chain n-fatty acids, waxes, n-alkanes and n-fatty alcohols. Free and esterified sterols and triterpenols, steroid hydrocarbons, steroid and triterpenoid ketones, as well as steryl glycosides were also found. Finally, the fate of the main constituents of kenaf fibers in alkaline pulping was also investigated.
Description:Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, P.O. Box 1052, 41080-Seville, Spain; E-mail address: delrio@irnase.csic.es (J.C. del Río)
URI:http://hdl.handle.net/10261/34823
???metadata.dc.identifier.doi???:http://dx.doi.org/10.1021/jf049540w
Appears in Collections:(IRNAS) Artículos

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