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Erschienen in: Cellulose 5/2018

31.03.2018 | Original Paper

Carboxymethylcellulose from bleached organosolv fibers of Eucalyptus nitens: synthesis and physicochemical characterization

verfasst von: Mauricio Yáñez-S, Betty Matsuhiro, Santiago Maldonado, Raúl González, Jorge Luengo, Omar Uyarte, Daniel Serafine, Sergio Moya, Julio Romero, Rodrigo Torres, Marcelo J. Kogan

Erschienen in: Cellulose | Ausgabe 5/2018

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Abstract

The objective of the present study was to synthesize sodium carboxymethylcellulose from Eucalyptus nitens cellulose. The cellulose extraction was carried out in three stages. In the first stage, E. nitens wood was fractionated using an organosolv pretreatment (methanol–water 50% v/v, 45 min at 200 °C) followed by an alkaline extraction (NaOH, 1.5 M). Finally, the organosolv pulp was bleached using NaClO2 (1.3% w/v, pH 3.8). The bleached cellulose obtained was converted to sodium carboxymethylcellulose (NaCMC) by an etherification reaction in isopropanol medium. NaCMC structure, morphology and properties were researched using FTIR, 1H and 13C NMR spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The results indicate substitution mostly occurred mostly at the C-6 position of 1 → 4 β-d-glucopyranosyl residues of cellulose chains.

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Metadaten
Titel
Carboxymethylcellulose from bleached organosolv fibers of Eucalyptus nitens: synthesis and physicochemical characterization
verfasst von
Mauricio Yáñez-S
Betty Matsuhiro
Santiago Maldonado
Raúl González
Jorge Luengo
Omar Uyarte
Daniel Serafine
Sergio Moya
Julio Romero
Rodrigo Torres
Marcelo J. Kogan
Publikationsdatum
31.03.2018
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 5/2018
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-018-1766-7

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