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.
Université Grenoble Alpes, LGP2, F-38000 Grenoble, France; CNRS, LGP2, F-38000 Grenoble, France; Université Grenoble Alpes, LRP, F-38000 Grenoble, France.
Carbohydr Polym. 2015 Dec 10;134:664-72. doi: 10.1016/j.carbpol.2015.07.091. Epub 2015 Jul 31.
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.
不同等级的纤维素纳米纤维（CNF）是由海洋草球和叶（POB 和 POL）制备的。使用 2,2,6,6-四甲基哌啶-1-氧自由基（TEMPO）介导的氧化预处理来促进超微摩擦研磨过程中的纤维化。随后比较了不同批次的 CNF 的形态和纤维化程度。还分析了在 TEMPO 介导的氧化过程中使用不同剂量的次氯酸钠产生的 CNF 悬浮液的流变性质。随着氧化剂浓度的增加，形成了更强的纤维网络结构，这可以通过储能模量值的增加来证实。与使用等量氧化剂时的海洋草叶相比，海洋草球经历了更强的纤维化，因此形成了更强的网络。
