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Reinforcing effect of carboxymethylated nanofibrillated cellulose powder on hydroxypropyl cellulose
Swiss Federal Laboratories for Materials Testing and Research (EMPA).
Swiss Federal Laboratories for Materials Testing and Research (EMPA).
Swiss Federal Laboratories for Materials Testing and Research (EMPA).
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2010 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 17, no 4, p. 793-802Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2010. Vol. 17, no 4, p. 793-802
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-4226DOI: 10.1007/s10570-010-9423-9ISI: 000279585500010Scopus ID: 2-s2.0-77954429582Local ID: 224fe8f0-6104-11df-ab16-000ea68e967bOAI: oai:DiVA.org:ltu-4226DiVA, id: diva2:977090
Note
Validerad; 2010; 20100516 (krioks)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Eyholzer, ChristianOksman, Kristiina

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