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Cellulose Nanofibers from Softwood, Hardwood, and Tunicate: Preparation-Structure-Film Performance Interrelation
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden ; Valmet AB, Sweden.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
Vise andre og tillknytning
2017 (engelsk)Inngår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 9, nr 15, s. 13508-13519Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This work reveals the structural variations of cellulose nanofibers (CNF) prepared from different cellulose sources, including softwood (Picea abies), hardwood (Eucalyptus grandis × E. urophylla), and tunicate (Ciona intestinalis), using different preparation processes and their correlations to the formation and performance of the films prepared from the CNF. Here, the CNF are prepared from wood chemical pulps and tunicate isolated cellulose by an identical homogenization treatment subsequent to either an enzymatic hydrolysis or a 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-mediated oxidation. They show a large structural diversity in terms of chemical, morphological, and crystalline structure. Among others, 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 is closely related to the charge density of the used CNF, and the tensile stress of the films is correlated to the crystallinity index of the CNF. In turn, the CNF structure is determined by the cellulose sources and the preparation processes. This study provides useful information and knowledge for understanding the importance of the raw material for the quality of CNF for various types of applications.

sted, utgiver, år, opplag, sider
2017. Vol. 9, nr 15, s. 13508-13519
Emneord [en]
cellulose nanofibers (CNF), comparison, correlation, film, hardwood, softwood, tunicate
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Identifikatorer
URN: urn:nbn:se:ri:diva-29743DOI: 10.1021/acsami.7b01738Scopus ID: 2-s2.0-85018498856OAI: oai:DiVA.org:ri-29743DiVA, id: diva2:1103489
Tilgjengelig fra: 2017-05-30 Laget: 2017-05-30 Sist oppdatert: 2023-03-27bibliografisk kontrollert

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