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Understanding nanoc...
Understanding nanocellulose chirality and structure-properties relationship at the single fibril level
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Usov, I. (författare)
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Nyström, G. (författare)
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Adamcik, J. (författare)
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Handschin, S. (författare)
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- Schütze, Christina (författare)
- Stockholms universitet,KTH,Wallenberg Wood Science Center,Institutionen för material- och miljökemi (MMK),Wallenberg Wood Science Center, KTH, Sweden
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- Fall, Andreas (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Bergström, Lennart (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Mezzenga, R. (författare)
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(creator_code:org_t)
- 2015-06-25
- 2015
- Engelska.
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Ingår i: Nature Communications. - : Nature Publishing Group. - 2041-1723. ; 6
- Relaterad länk:
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https://www.nature.c...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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visa färre...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- cellulose; nanocellulose; nanoparticle; polymer; unclassified drug
- asymmetry; biomechanics; cellulose; Gaussian method; polymer; statistical analysis
- Article; atomic force microscopy; chemical structure; chirality; electron microscopy; fiber; molecular mechanics; structure analysis
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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