Physicochemical characterisation of sugar cane bagasse lignin oxidized by hydrogen peroxide

A. Mancera, V. Fierro, A. Pizzi, S. Dumarçay, P. Gérardin, J. Velásquez, G. Quintana, A. Celzard

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    Abstract

    The oxidation of soda lignin extracted from sugar cane bagasse was studied in acid medium. Soda lignin was precipitated from black liquor by adding (36N) sulphuric acid until the pH of the resultant solution was close to 2. The resultant, dried, material was oxidized using hydrogen peroxide. Soda lignin oxidized at different times was investigated by CHNS and EDX chemical analysis, GPC, FTIR and solid state CP-MAS 13C NMR spectroscopy. Oxidation increased the amount of carboxylic groups, while that of associated carbohydrates decreased. In addition, self-condensation with increase of molecular weight was observed.

    Original languageEnglish
    Pages (from-to)470-476
    Number of pages7
    JournalPolymer Degradation and Stability
    Volume95
    Issue number4
    DOIs
    StatePublished - Apr 2010

    Bibliographical note

    Funding Information:
    The authors acknowledge with thanks the financial support of the European Commission through the ALFA Program (Project LIGNOCARB-ALFA II 0412 FA FI), especially A. Mancera-Arias for the grants of her two internships in France. M.L. Antoine (ENSTIB, France) is thanked for technical support in the GPC experiments. The French authors also gratefully acknowledge the financial support of the CPER 2007–2013 “Structuration du Pôle de Compétitivité Fibres Grand'Est” (Competitiveness Fibre Cluster), through local (Conseil Général des Vosges), regional (Région Lorraine), national (DRRT and FNADT) and European (FEDER) funds.

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