Isolation and characterization of lignin from Moroccan sugar cane bagasse: Production of lignin-phenol-formaldehyde wood adhesive

Abstract : lignin-based materials were isolated from Moroccan sugar cane bagasse after alkaline delignification. Sugar cane bagasse was subjected to hot water (70 degrees C) and alkaline aqueous solutions (15% of sodium hydroxide (NaOH), 98 degrees C) treatments. The dissolved lignin macromolecules were separated and purified. The isolated solid was then characterized by different complementary analysis (FT-IR; H-1, C-13 NMR; GPC and TGA). In the present work, the possibility of preparing wood adhesives from bagasse lignin has been explored. The results showed that the delignification with 15% NaOH resulted in yields of cellulose and lignin of 42 +/- 2.2% and 13 +/- 1.5%, respectively. The extracted lignin scaffolds exhibits high reactivity due to the high content of hydroxyl group. Their higher molecular weight (2781 g/mol) and good thermal stability (180 degrees C) make them excellent candidates for partial substitution of phenol formaldehyde (PF) resin. A resin formulation in which up to 30% of PP can be substituted by bagasse lignin gave good results and was employed for the elaboration of plywood panels which passed relevant international standard specifications for interior-grade panels.
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Industrial Crops and Products, Elsevier, 2013, 45, pp.296-302. 〈10.1016/j.indcrop.2012.12.040〉
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https://hal.univ-lorraine.fr/hal-01593756
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Soumis le : mardi 26 septembre 2017 - 16:25:28
Dernière modification le : mercredi 5 septembre 2018 - 14:50:10

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Amine Moubarik, Nabil Grimi, Nadia Boussetta, Antonio Pizzi. Isolation and characterization of lignin from Moroccan sugar cane bagasse: Production of lignin-phenol-formaldehyde wood adhesive. Industrial Crops and Products, Elsevier, 2013, 45, pp.296-302. 〈10.1016/j.indcrop.2012.12.040〉. 〈hal-01593756〉

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