Isolation and characterization of cellulose nanocrystals from spruce bark in a biorefinery perspective
2014 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 111, 979-987 p.Article in journal (Refereed) Published
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.
Biorefinery, Cellulose nanocrystals, Picea abies, Spruce bark
Polymer Chemistry Polymer Technologies
IdentifiersURN: urn:nbn:se:kth:diva-150503DOI: 10.1016/j.carbpol.2014.04.092ISI: 000340302100118ScopusID: 2-s2.0-84903690997OAI: oai:DiVA.org:kth-150503DiVA: diva2:748920
QC 201409222014-09-222014-09-052014-09-22Bibliographically approved