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Cellulose

Erschienen in:

01.08.2010

Reinforcing effect of carboxymethylated nanofibrillated cellulose powder on hydroxypropyl cellulose

verfasst von: Ch. Eyholzer, F. Lopez-Suevos, P. Tingaut, T. Zimmermann, K. Oksman

Erschienen in: Cellulose | Ausgabe 4/2010

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Abstract

Bionanocomposites of hydroxypropyl cellulose (HPC) and nanofibrillated cellulose (NFC) were prepared by solution casting. The various NFC were in form of powders and were prepared from refined, bleached beech pulp (RBP) by mechanical disintegration, optionally combined with a pre- or post mechanical carboxymethylation. Dynamic mechanical analysis (DMA) and tensile tests were performed to compare the reinforcing effects of the NFC powders to those of their never-dried analogues. For unmodified NFC powders an inferior reinforcing potential in HPC was observed that was ascribed to severe hornification and reagglomeration of NFC. In contrast, the composites with carboxymethylated NFC showed similar behaviors, regardless of the NFC suspensions being dried or not prior to composite preparation. SEM characterization confirmed a homogeneous dispersion of dried, carboxymethylated NFC within the HPC matrix. These results clearly demonstrate that drying of carboxymethylated NFC to a powder does not decrease its reinforcing potential in (bio)nanocomposites.

Vorheriger Artikel Self-reinforced cellulose nanocomposites

Nächster Artikel Blend films of natural wool and cellulose prepared from an ionic liquid

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Titel: Reinforcing effect of carboxymethylated nanofibrillated cellulose powder on hydroxypropyl cellulose
verfasst von: Ch. Eyholzer
F. Lopez-Suevos
P. Tingaut
T. Zimmermann
K. Oksman
Publikationsdatum: 01.08.2010
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 4/2010
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-010-9423-9

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