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Erschienen in: Cellulose 10/2018

16.08.2018 | Original Paper

Morphological characteristics of carboxymethylated cellulose nanofibrils: the effect of carboxyl content

verfasst von: Wanhee Im, Araz Rajabi Abhari, Hye Jung Youn, Hak Lae Lee

Erschienen in: Cellulose | Ausgabe 10/2018

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Abstract

This study investigated the effects of carboxyl content and mechanical treatment intensity on the morphological characteristics of carboxymethylated cellulose nanofibrils (CM CNFs) and on the rheological properties of CM CNF suspension. The mechanical properties of self-standing CM CNF film were also examined. CM CNFs produced under different conditions had similar, uniform widths of about 5 nm, as measured using transmission electron microscope images and Image J software. The aspect ratios of three CM CNFs were evaluated using gel point analysis and the crowding number theory. Higher carboxyl content in the CM CNFs reduced the amount of mechanical energy required and increased the aspect ratio. The rheological properties and the tensile properties of CNF film were all strongly influenced by the aspect ratio of the CM CNFs. The CM CNF samples with higher aspect ratios produced stronger suspension network structures and had greater tensile properties.

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Metadaten
Titel
Morphological characteristics of carboxymethylated cellulose nanofibrils: the effect of carboxyl content
verfasst von
Wanhee Im
Araz Rajabi Abhari
Hye Jung Youn
Hak Lae Lee
Publikationsdatum
16.08.2018
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 10/2018
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-018-1993-y

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