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Cellulose Nanofibers from Softwood, Hardwood, and Tunicate: Preparation-Structure-Film Performance Interrelation
KTH Royal Institute of Technology.
KTH Royal Institute of Technology och Valmet AB .
KTH Royal Institute of Technology.
KTH Royal Institute of Technology.
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2017 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 9, no 15, p. 13508-13519Article in journal (Refereed) Published
Abstract [en]

This work reveals the structural variations ofcellulose nanofibers (CNF) prepared from different cellulosesources, including softwood (Picea abies), hardwood (Euca-lyptus grandis × E. urophylla), and tunicate (Ciona intestinalis),using different preparation processes and their correlations tothe formation and performance of the films prepared from theCNF. Here, the CNF are prepared from wood chemical pulpsand tunicate isolated cellulose by an identical homogenizationtreatment subsequent to either an enzymatic hydrolysis or a2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-mediated oxi-dation. They show a large structural diversity in terms ofchemical, morphological, and crystalline structure. Amongothers, the tunicate CNF consist of purer cellulose and have a degree of polymerization higher than that of wood CNF.Introduction of surface charges via the TEMPO-mediated oxidation is found to have significant impacts on the structure,morphology, optical, mechanical, thermal, and hydrophobic properties of the prepared films. For example, the film density isclosely related to the charge density of the used CNF, and the tensile stress of the films is correlated to the crystallinity index ofthe CNF. In turn, the CNF structure is determined by the cellulose sources and the preparation processes. This study providesuseful information and knowledge for understanding the importance of the raw material for the quality of CNF for various typesof applications.

Place, publisher, year, edition, pages
2017. Vol. 9, no 15, p. 13508-13519
Keywords [en]
cellulose nanofibers (CNF), softwood, hardwood, tunicate, film, comparison, correlation
National Category
Paper, Pulp and Fiber Technology Nano Technology
Identifiers
URN: urn:nbn:se:miun:diva-32642DOI: 10.1021/acsami.7b01738OAI: oai:DiVA.org:miun-32642DiVA, id: diva2:1170510
Available from: 2018-01-03 Created: 2018-01-03 Last updated: 2018-01-04Bibliographically approved

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Moser, Carl

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