Impact of catalytic oil palm fronds (OPF) pulping on organosolv lignin properties

M. Hazwan Hussin (1, 2) , Afidah Abdul Rahim (1) , Mohamad Nasir Mohamad Ibrahim (1) , Dominique Perrin (2) , Mehdi Yemloul (3) , Nicolas Brosse (2)

1 USM - Universiti Sains Malaysia
2 LERMAB - Laboratoire d'Etude et de Recherche sur le Matériau Bois
3 ISM2 - Institut des Sciences Moléculaires de Marseille

This article sheds light on the structural characteristic and antioxidant activity of the ethanol organosolv lignin extracted from oil palm fronds (OPF) via incorporation of 1,8-dihydroxyanthraquinone during the delignification process. The resulting modified organosolv lignin (DEOL) was studied by P-31 NMR, HSQC, HMBC and GPC. It was proposed that addition of a catalytic amount of 1,8-dihydroxyanthraquinone during pulping process; (1) enhanced the dissolution of lignin and the delignification rate, (2) improved the solubility of the resulting modified lignin (DEOL) by reducing its hydrophobicity properties and (3) improved its antioxidant activity compared to untreated organosolv lignin (EOL) (DEOL: 78% and EOL: 53% of Oxygen Uptake Inhibition (OUI) respectively). It was shown that antioxidant activity was closely related to its average molecular weight and phenolic hydroxyl content.

Mots clés: Organosolv lignin; Oil palm fronds; 1; 8-Dihydroxyanthraquinone; Phenolic -OH; Antioxidant

Domaines: Sciences de l'ingénieur [physics]

M. Hazwan Hussin, Afidah Abdul Rahim, Mohamad Nasir Mohamad Ibrahim, Dominique Perrin, Mehdi Yemloul, et al.. Impact of catalytic oil palm fronds (OPF) pulping on organosolv lignin properties. Polymer Degradation and Stability, 2014, 109 (SI), pp.33-39. ⟨10.1016/j.polymdegradstab.2014.06.016⟩. ⟨hal-01597089⟩