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Cellulose Nanocrystals from Forest Residues as Reinforcing Agents for Composites: A Study from Macro- to Nano-Dimensions
KTH Royal Institute of Technology.ORCID iD: 0000-0002-0252-337X
KTH Royal Institute of Technology.ORCID iD: 0000-0003-3572-7798
KTH Royal Institute of Technology.
2016 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 139, p. 139-149Article in journal (Refereed) Published
Abstract [en]

This study investigates for the first time the feasibility of extracting cellulose nanocrystals (CNCs) from softwood forestry logging residues (woody chips, branches and pine needles), with an obtained gravimetric yield of over 13%. Compared with the other residues, woody chips rendered a higher yield of bleached cellulosic fibers with higher hemicellulose, pectin and lignin content, longer diameter, and lower crystallinity and thermal stability. The isolation of CNCs from these bleached cellulosic fibers was verified by the removal of most of their amorphous components, the increase in the crystallinity index, and the nano-dimensions of the individual crystals. The differences in the physico-chemical properties of the fibers extracted from the three logging residues resulted in CNCs with specific physico-chemical properties. The potential of using the resulting CNCs as reinforcements in nanocomposites was discussed in terms of aspect ratio, crystallinity and thermal stability.

Place, publisher, year, edition, pages
2016. Vol. 139, p. 139-149
Keywords [en]
Cellulose nanocrystals, Forest residues, Physico-chemical properties, Reinforcing agents in composites, Thermal properties
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:his:diva-15867DOI: 10.1016/j.carbpol.2015.12.020ISI: 000368097200018Scopus ID: 2-s2.0-84952342690OAI: oai:DiVA.org:his-15867DiVA, id: diva2:1228932
Available from: 2016-02-02 Created: 2018-06-29 Last updated: 2018-08-14Bibliographically approved

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Moriana, Rosana

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CiteExportLink to record
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