Journal
CARBOHYDRATE POLYMERS
Volume 134, Issue -, Pages 664-672Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.07.091
Keywords
Posidonia oceanica; Cellulose nanofibrils (CNF); Nanofibrillated cellulose (NFC); TEMPO-oxidation; TEM; Rheological behavior
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Funding
- PHC-UTIQUE CMCU [13G1114]
- Institut francais de cooperation en Tunisie- IFC Tunisie
- CMIRA
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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. (C) 2015 Elsevier Ltd. All rights reserved.
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