title: Effect of the oxidation treatment on the production of cellulose nanofiber suspensions from Posidonia oceanica: The rheological aspect.
abstract: Different grades of cellulose nanofibrils (CNF) were prepared from Posidonia oceanica balls and leaves (POB and POL). Pretreatment using 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation was performed to facilitate the fibrillation during ultrafine friction grinding process. The ensuing CNF batches were compared in terms of morphology and degree of fibrillation. The rheological properties of the produced CNF suspensions were also analyzed for varying doses of sodium hypochlorite used during the TEMPO- mediated oxidation procedure. The stronger fibrous network structures were formed when increasing the oxidant concentration, which was confirmed by the increase of the storage moduli value. P. oceanica balls were found to undergo stronger fibrillation and, consequently, to form stronger networks, compared to P. oceanica leaves, when using equivalent concentration of the oxidizing agent.
authors.affiliation: University of Monastir, Faculty of Sciences, UR13ES63-Research Unity of Applied Chemistry & Environment, 5000 Monastir, Tunisia; Université Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France.
authors.forename: Fedia
authors.initials: F
authors.lastname: Bettaieb
authors.affiliation: Université Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France; Université Grenoble Alpes, LRP, F-38000 Grenoble, France.
authors.forename: Oleksandr
authors.initials: O
authors.lastname: Nechyporchuk
authors.affiliation: University of Monastir, Faculty of Sciences, UR13ES63-Research Unity of Applied Chemistry & Environment, 5000 Monastir, Tunisia; Université Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France. Electronic address: khiari_ramzi2000@yahoo.fr.
authors.forename: Ramzi
authors.initials: R
authors.lastname: Khiari
authors.affiliation: University of Monastir, Faculty of Sciences, UR13ES63-Research Unity of Applied Chemistry & Environment, 5000 Monastir, Tunisia.
authors.forename: Mohamed Farouk
authors.initials: MF
authors.lastname: Mhenni
authors.affiliation: Université Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Dufresne
authors.affiliation: Université Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France.
authors.forename: Mohamed Naceur
authors.initials: MN
authors.lastname: Belgacem
mesh_terms: D035961:Alismatales / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D003497:Cyclic N-Oxides / Q000737:chemistry; D057139:Nanofibers / Q000737:chemistry*; D010084:Oxidation-Reduction; D018515:Plant Leaves / Q000737:chemistry; D012212:Rheology; D014783:Viscosity
chemical_list: D003497:Cyclic N-Oxides; D002482:Cellulose; C003959:TEMPO
keywords: Cellulose nanofibrils (CNF); Nanofibrillated cellulose (NFC); Posidonia oceanica; Rheological behavior; TEM; TEMPO-oxidation