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Understanding nanocellulose chirality and structure-properties relationship at the single fibril level

Nature communications, 2015-06, Vol.6 (1), p.7564-7564, Article 7564 [Peer Reviewed Journal]

Copyright Nature Publishing Group Jun 2015 ;Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. 2015 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/ncomms8564 ;PMID: 26108282

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  • Title:
    Understanding nanocellulose chirality and structure-properties relationship at the single fibril level
  • Author: Usov, Ivan ; Nyström, Gustav ; Adamcik, Jozef ; Handschin, Stephan ; Schütz, Christina ; Fall, Andreas ; Bergström, Lennart ; Mezzenga, Raffaele
  • Is Part Of: Nature communications, 2015-06, Vol.6 (1), p.7564-7564, Article 7564
  • Description: Nanocellulose fibrils are ubiquitous in nature and nanotechnologies but their mesoscopic structural assembly is not yet fully understood. Here we study the structural features of rod-like cellulose nanoparticles on a single particle level, by applying statistical polymer physics concepts on electron and atomic force microscopy images, and we assess their physical properties via quantitative nanomechanical mapping. We show evidence of right-handed chirality, observed on both bundles and on single fibrils. Statistical analysis of contours from microscopy images shows a non-Gaussian kink angle distribution. This is inconsistent with a structure consisting of alternating amorphous and crystalline domains along the contour and supports process-induced kink formation. The intrinsic mechanical properties of nanocellulose are extracted from nanoindentation and persistence length method for transversal and longitudinal directions, respectively. The structural analysis is pushed to the level of single cellulose polymer chains, and their smallest associated unit with a proposed 2 × 2 chain-packing arrangement.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2041-1723
    EISSN: 2041-1723
    DOI: 10.1038/ncomms8564
    PMID: 26108282
  • Source: PubMed Central
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    ProQuest Central
    DOAJ Directory of Open Access Journals
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