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Isolation and characterization of cellulose nanocrystals from spruce bark in a biorefinery perspective
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.ORCID iD: 0000-0002-0252-337X
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
2014 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 111, 979-987 p.Article in journal (Refereed) Published
Abstract [en]

The present study reports for the first time the isolation of cellulose fibers and cellulose nanocrystals (CNCs) from the bark of Norway spruce. The upgrading of bark cellulose to value-added products, such as CNCs, is part of the "bark biorefinery" concept. The removal of non-cellulosic constituents was monitored throughout the isolation process by detailed chemical composition analyses. The morphological investigation of the CNCs was performed using AFM and showed the presence of nanocrystals with an average length of 175.3 nm and a diameter of 2.8 nm, giving an aspect ratio of around 63. X-ray diffraction (XRD) analyses showed that the crystallinity index increased with successive treatments to reach a final value greater than 80% for CNCs. The thermal degradation of the isolated bark CNCs started at 190 degrees C Spruce bark appeared to be a new promising industrial source of cellulose fibers and CNCs.

Place, publisher, year, edition, pages
2014. Vol. 111, 979-987 p.
Keyword [en]
Biorefinery, Cellulose nanocrystals, Picea abies, Spruce bark
National Category
Polymer Chemistry Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-150503DOI: 10.1016/j.carbpol.2014.04.092ISI: 000340302100118Scopus ID: 2-s2.0-84903690997OAI: oai:DiVA.org:kth-150503DiVA: diva2:748920
Note

QC 20140922

Available from: 2014-09-22 Created: 2014-09-05 Last updated: 2017-12-05Bibliographically approved

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