Isolation ; characterization and valorization of hemicelluloses from Aristida pungens leaves as biomaterial

Lahouari Chaa; Nicolas Joly; Vincent Lequart; Céline Faugeron; Jean-Claude Mollet; Patrick Martin; Henri Morvan

doi:10.1016/j.carbpol.2008.04.017

Article dans une revue

Isolation ; characterization and valorization of hemicelluloses from Aristida pungens leaves as biomaterial

Lahouari Chaa ^{1, 2} Nicolas Joly ³ Vincent Lequart ⁴ Céline Faugeron ⁵ Jean-Claude Mollet ^{2, 6} Patrick Martin ³ Henri Morvan ²

1 LBHE - Laboratoire de Physiopathologie de la Barrière Hémato-Encéphalique

2 Laboratoire de Glycobiologie et Physiologie Végétale, Université d’Artois, Faculté Jean Perrin, SP18 Rue Jean Souvraz, 62307 Lens, France

3 UCCS - Unité de Catalyse et de Chimie du Solide - UMR 8181

4 UCCS Artois - Unité de Catalyse et de Chimie du Solide - Site Artois

5 LCSN - Laboratoire de Chimie des Substances Naturelles

6 GTCV - Glycobiologie et transports chez les végétaux

Abstract : Aristida pungens, a perennial grass widely distributed on the Algerian arid regions, may potentially be the source of raw cell wall material to promote a local development in North Africa. Hemicelluloses, the main matrix cell wall polymers of this species were isolated from leaves with 14% KOH aqueous solution, characterized and converted as plastic material. The extraction procedure yielded two hemicellulose fractions (A and B) accounting for 3.5 and 10.1% of the starting leaf material, respectively. GC and13C NMR showed the presence of xylose as the main component with arabinosyl residues. Both analyses indicate that hemicelluloses from A. pungens leaves are arabinoxylans. Arabinoxylans were transformed into hydrophobic plastics by grafting of lauroyl chloride. The resulting materials were characterized by FT-IR and1H NMR spectroscopies, with both mechanical and thermogravimetric analysis.

Keywords : Plastic films Aristida pungens Hemicelluloses Arabinoxylan

Type de document :

Article dans une revue

Domaine :

Chimie / Chimie organique

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https://hal-unilim.archives-ouvertes.fr/hal-00687060
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Soumis le : jeudi 12 avril 2012 - 10:16:42
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Isolation ; characterization and valorization of hemicelluloses from Aristida pungens leaves as biomaterial

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Isolation ; characterization and valorization of hemicelluloses from Aristida pungens leaves as biomaterial

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