Lignin-Containing Cellulose Nanofibrils from TEMPO-Mediated Oxidation of Date Palm Waste: Preparation, Characterization, and Reinforcing Potential - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Nanomaterials Année : 2023

Lignin-Containing Cellulose Nanofibrils from TEMPO-Mediated Oxidation of Date Palm Waste: Preparation, Characterization, and Reinforcing Potential

Amira Najahi
Quim Tarrés
Marc Delgado-Aguilar
  • Fonction : Auteur correspondant
  • PersonId : 1209931

Connectez-vous pour contacter l'auteur
Sami Boufi
Connectez-vous pour contacter l'auteur

Résumé

Lignin-containing cellulose nanofibrils (LCNFs) have emerged as a new class of nanocelluloses where the presence of residual lignin is expected to impart additional attributes such as hydrophobicity or UV-absorption. In the present work, LCNFs with a lignin content between 7 and 15 wt% were prepared via a TEMPO-mediated oxidation as chemical pretreatment followed by high-pressure homogenization. The impact of the carboxyl content (CC) on the properties of the resulting LCNF gel, in terms of lignin content, colloidal properties, morphology, crystallinity, and thermal stability, were investigated. It was found that lignin content was significantly decreased at increasing CC. In addition, CC had a positive effect on colloidal stability and water contact angle, as well as resulting in smaller fibrils. This lower size, together with the lower lignin content, resulted in a slightly lower thermal stability. The reinforcing potential of the LCNFs when incorporated into a ductile polymer matrix was also explored by preparing nanocomposite films with different LCNF contents that were mechanically tested under linear and non-linear regimes by dynamic mechanical analysis (DMA) and tensile tests. For comparison purposes, the reinforcing effect of the LCNFs with lignin-free CNFs was also reported based on literature data. It was found that lignin hinders the network-forming capacity of LCNFs, as literature data shows a higher reinforcing potential of lignin-free CNFs. Nonetheless, the tensile strength of the acrylic matrix was enhanced by 10-fold at 10 wt% of LCNF content.

Domaines

Polymères
Fichier principal
Vignette du fichier
Najahi_Nanomaterials_2023.pdf (4.76 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03914951 , version 1 (28-12-2022)

Identifiants

Citer

Amira Najahi, Quim Tarrés, Pere Mutjé, Marc Delgado-Aguilar, Jean-Luc Putaux, et al.. Lignin-Containing Cellulose Nanofibrils from TEMPO-Mediated Oxidation of Date Palm Waste: Preparation, Characterization, and Reinforcing Potential. Nanomaterials, 2023, 13 (1), pp.126. ⟨10.3390/nano13010126⟩. ⟨hal-03914951⟩
63 Consultations
53 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More