title: Use of food and packaging model matrices to investigate the antioxidant properties of biorefinery grass lignins.
abstract: The antioxidant properties of grass lignins recovered from an alkaline industrial process and from different ethanol organosolv pretreatment processes were compared using two types of tests: (i) classical radical 2,2'-diphenyl-1-picrylhydrazyl (DPPH(•)) scavenging tests in dioxane/water or ethanol and (ii) tests involving multiphasic systems (lipid dispersion in water or cellulose film suspended in ethanol). These multiphasic systems were representative of food and packaging matrices in view of high-value applications. All lignins, in solution or in the film, effectively scavenged radicals. Moreover, they were competitive with a food commercial rosemary extract to protect linoleic acid against oxidation. Whereas the DPPH(•) test in dioxane was not discriminant, differences appeared between lignins when the test was performed in ethanol or with the multiphasic systems. Moreover, radical scavenging activity was preserved in the film even after its immersion in ethanol. Structural analysis of lignins revealed that low-molar-mass phenolics, namely p-hydroxycinnamic acids and lignin depolymerization products, governed lignin antioxidant properties in the multiphasic systems.
authors.affiliation: INRA , UMR614 Fractionnement des AgroRessources et Environnement, F-51100 Reims, France.|Université de Reims Champagne-Ardenne , UMR614, Fractionnement des AgroRessources et Environnement, F-51100 Reims, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Aguié-Béghin
authors.affiliation: INRA , UMR614 Fractionnement des AgroRessources et Environnement, F-51100 Reims, France.|Université de Reims Champagne-Ardenne , UMR614, Fractionnement des AgroRessources et Environnement, F-51100 Reims, France.
authors.forename: Laurence
authors.initials: L
authors.lastname: Foulon
authors.affiliation: AgroParisTech , UMR1145 GENIAL, F-91300 Massy, France.|INRA , UMR1145 GENIAL, F-91300 Massy, France.
authors.forename: Paola
authors.initials: P
authors.lastname: Soto
authors.affiliation: INRA , UMR614 Fractionnement des AgroRessources et Environnement, F-51100 Reims, France.|Université de Reims Champagne-Ardenne , UMR614, Fractionnement des AgroRessources et Environnement, F-51100 Reims, France.
authors.forename: David
authors.initials: D
authors.lastname: Crônier
authors.affiliation: AgroParisTech , UMR1145 GENIAL, F-91300 Massy, France.|INRA , UMR1145 GENIAL, F-91300 Massy, France.
authors.forename: Elena
authors.initials: E
authors.lastname: Corti
authors.affiliation: Institut Jean-Pierre Bourgin (IJPB), INRA, AgroParisTech, CNRS, Université Paris-Saclay , RD10, 78026 Versailles Cedex, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Legée
authors.affiliation: Institut Jean-Pierre Bourgin (IJPB), INRA, AgroParisTech, CNRS, Université Paris-Saclay , RD10, 78026 Versailles Cedex, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: Cézard
authors.affiliation: INRA , UMR614 Fractionnement des AgroRessources et Environnement, F-51100 Reims, France.|Université de Reims Champagne-Ardenne , UMR614, Fractionnement des AgroRessources et Environnement, F-51100 Reims, France.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Chabbert
authors.affiliation: AgroParisTech , UMR1145 GENIAL, F-91300 Massy, France.|INRA , UMR1145 GENIAL, F-91300 Massy, France.
authors.forename: Marie-Noëlle
authors.initials: MN
authors.lastname: Maillard
authors.affiliation: Energy Research Centre of The Netherlands (ECN) , Westerduinweg 3, 1755 LE Petten, The Netherlands.
authors.forename: Wouter J J
authors.initials: WJ
authors.lastname: Huijgen
authors.affiliation: Institut Jean-Pierre Bourgin (IJPB), INRA, AgroParisTech, CNRS, Université Paris-Saclay , RD10, 78026 Versailles Cedex, France.
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Baumberger
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D007700:Kinetics; D008031:Lignin / Q000737:chemistry*; D010084:Oxidation-Reduction; D006109:Poaceae / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D008031:Lignin
keywords: biorefinery; cellulose nanocomposites; ethanol; food antioxidant; grass lignins; hydrogel films; organosolv; radical scavenging; soda; wheat straw