Carboxymethyl cellulose-based films: Effect of organosolv lignin incorporation on physicochemical and antioxidant properties. (November 2020)

• Record Type: Journal Article
• Authors: Michelin, Michele; Marques, Arlete M.; Pastrana, Lorenzo M.; Teixeira, José A.; Cerqueira, Miguel A.
• Is Part Of: Journal of food engineering. Volume 285(2020)
• Publication Date: 2020-11
• Subjects: Lignocellulosic material -- Antioxidant -- Bio-based -- Films -- Functional -- Composite; Food industry and trade -- Periodicals; Food -- Analysis -- Periodicals; Aliments -- Industrie et commerce -- Périodiques; Aliments -- Analyse -- Périodiques; Aliments -- Recherche -- Périodiques; 664.005
• DOI: 10.1016/j.jfoodeng.2020.110107
• Languages: English
• ISSNs: 0260-8774

Abstract

Abstract: Organosolv lignin was incorporated in carboxymethyl cellulose (CMC)-based films as a reinforcing and bioactive agent. Films were produced by the casting method using compatible and environmentally friendly solvents. The incorporation of lignin in CMC-based films was evaluated in term of morphology, physicochemical, barrier, mechanical and antioxidant properties. Solubility tests showed that lignin improved the water resistance of the films for approx. 60%. This behavior was also observed for the water vapor permeability, achieving a 20% reduction. Morphological characteristics suggested low compatibility between organosolv lignin and CMC matrix, revealed by the small aggregates homogeneously distributed in the film, through scanning electron microscopy, related to the self-assembly behavior of lignin. CMC/lignin-based films also presented higher thermal stability. Fourier transform infrared spectroscopy showed that incorporation of lignin led to small changes in the film's structure. Finally, organosolv lignin proved to be a promising material for the development of active CMC-based films due to its demonstrated antioxidant activity that can be useful to pack food products that suffer from undesirable oxidation reactions. Highlights: Organosolv lignin was successfully incorporated into CMC-based films. Lignin improved the water resistance of the CMC-based films. CMC/lignin-based films showed high antioxidant activity.