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Cellulose Nanocrystals from Forest Residues as Reinforcing Agents for Composites: A Study from Macro- to Nano-Dimensions
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi, Träkemi och massateknologi.ORCID-id: 0000-0002-0252-337X
KTH, Skolan för bioteknologi (BIO), Glykovetenskap. KTH, Skolan för kemivetenskap (CHE), Centra, Wallenberg Wood Science Center.ORCID-id: 0000-0003-3572-7798
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi, Träkemi och massateknologi.
2016 (engelsk)Inngår i: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 139, s. 139-149Artikkel i tidsskrift (Fagfellevurdert) Published
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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.

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Elsevier, 2016. Vol. 139, s. 139-149
Emneord [en]
Cellulose nanocrystals, Forest residues, Physico-chemical properties, Reinforcing agents in composites, Thermal properties
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URN: urn:nbn:se:kth:diva-180900DOI: 10.1016/j.carbpol.2015.12.020ISI: 000368097200018Scopus ID: 2-s2.0-84952342690OAI: oai:DiVA.org:kth-180900DiVA, id: diva2:899494
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QC 20160202

Tilgjengelig fra: 2016-02-02 Laget: 2016-01-25 Sist oppdatert: 2017-11-30bibliografisk kontrollert

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