High carboxyl content cellulose nanofibers from banana peel via one-pot nitro-oxidative fabrication / Dung Van Nguyen in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 33, N° 2 (04/2023)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 33, N° 2 (04/2023) . - p. 127-133 Titre : High carboxyl content cellulose nanofibers from banana peel via one-pot nitro-oxidative fabrication Type de document : texte imprimé Auteurs : Dung Van Nguyen, Auteur ; Ha Thi Ngan Nguyen, Auteur Année de publication : 2023 Article en page(s) : p. 127-133 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bananes et constituants Caractérisation Carboxycellulose Déchets -- Valorisation Ions, Echange d' Nanofibres Nitro-oxydation Index. décimale : 620.197 Matériaux fibreux d'origine végétale et animale : textiles, papier Résumé : Banana peels (BP) are the outer covering of a banana fruit and are usually discarded as abundant and underutilized waste from banana production and consumption. This work investigated the bioresource for one-pot preparation of carboxyl cellulose nanofibers (CCNF) using the nitro-oxidation method. Briefly, BP was added to a mixture of HNO3 and NaNO2 at 30–50oC for 6 h. To characterize the obtained material, different methods, including X-ray diffraction, TEM images, FTIR spectroscopy, EDX spectroscopy, and acid-base titration, were used. TEM images reveal that the nanofibers were mainly formed with a diameter of roughly 20–50 nm. Moreover, the results of FTIR, EDX, and titration proved the formation of carboxylic acid (-COOH) groups in CCNF with an amount of 4.9 mmol/g, or 22 wt%. This high carboxyl content makes CCNF an ion-exchange material, thereby enabling the development of new applications. Compared with traditional multistep processes for the preparation of cellulose nanomaterials, the current approach is simpler, uses fewer chemicals, and consumes less energy. Overall, these successful results not only valorize potential banana peel waste but also introduce an advanced material for further use. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of carboxyl cellulose nanofibers - Characterization of carboxyl cellulose nanofibers - RESULTS AND DISCUSSION : XRD patterns of banana peel and CCNF - TEM images of CCNF - Carboxyl content in CCNF - FTIR spectra of banana peel and CCNF - EDX spectra of banana peel and CCNF - Table 1 : Crystallinity and carboxyl content of banana peel and CCNF samples - Table 2 : Elemental compositions of banana peel and CCNF-40 from EDX analysis DOI : https://doi.org/10.18280/rcma.330208 En ligne : https://www.iieta.org/download/file/fid/96186 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39963 [article]

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