Enhancing the Antioxidant Activity of Technical Lignins by Combining Solvent Fractionation and Ionic-Liquid Treatment

Autor: Majira, Amel, Godon, Blandine, Foulon, Laurence, van der Putten, Jacinta C., Cézard, Laurent, Thierry, Marina, Pion, Florian, Bado-Nilles, Anne, Pandard, Pascal, Jayabalan, Thangavelu, Aguié-Béghin, Véronique, Ducrot, Paul Henri, Lapierre, Catherine, Marlair, Guy, Gosselink, Richard J.A., Baumberger, Stephanie, Cottyn, Betty
Přispěvatelé: Institut Jean-Pierre Bourgin (IJPB), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Université Paris Saclay (COmUE), Fractionnement des AgroRessources et Environnement (FARE), Université de Reims Champagne-Ardenne (URCA)-Institut National de la Recherche Agronomique (INRA), Wageningen University and Research [Wageningen] (WUR), Institut National de l'Environnement Industriel et des Risques (INERIS), ANR-10-LABX-552 0040SPS
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: ChemSusChem 12 (2019) 21
Chemsuschem
ChemSusChem
ChemSusChem, ChemPubSoc Europe/Wiley, 2019, 12 (21), pp.4799-4809. ⟨10.1002/cssc.201901916⟩
ChemSusChem, 12(21), 4799-4809
ISSN: 1864-5631
1864-564X
Popis: A grass soda technical lignin (PB1000) underwent a process combining solvent fractionation and treatment with an ionic liquid (IL), and a comprehensive investigation of the structural modifications was performed by using high‐performance size‐exclusion chromatography, 31P NMR spectroscopy, thioacidolysis, and GC–MS. Three fractions with distinct reactivity were recovered from successive ethyl acetate (EA), butanone, and methanol extractions. In parallel, a fraction deprived of EA extractives was obtained. The samples were treated with methyl imidazolium bromide ([HMIM]Br) by using either conventional heating or microwave irradiation. The treatment allowed us to solubilize 28 % of the EA‐insoluble fraction and yielded additional free phenols in all the fractions, as a consequence of depolymerization and demethylation. The gain of the combined process in terms of antioxidant properties was demonstrated through 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH.) radical‐scavenging tests. Integrating further IL safety‐related data and environmental considerations, this study paves the way for the sustainable production of phenolic oligomers competing with commercial antioxidants.
Technical lignin refinement: A cascade biorefinery process is presented that enables upgrading of technical lignins and sustainable production of phenolic oligomers of interest as substitutes for commercial antioxidants.
Databáze: OpenAIRE
Externí odkaz: