Aligning cellulose nanofibril dispersions for tougher fibers

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Mohammadi, Pezhman Toivonen, Matti S. Ikkala, Olli Wagermaier, Wolfgang Linder, Markus B. 2017-10-15T20:57:58Z 2017-10-15T20:57:58Z 2017-12-01
dc.identifier.citation Mohammadi , P , Toivonen , M S , Ikkala , O , Wagermaier , W & Linder , M B 2017 , ' Aligning cellulose nanofibril dispersions for tougher fibers ' Scientific Reports , vol 7 , no. 1 , 11860 . DOI: 10.1038/s41598-017-12107-x en
dc.identifier.issn 2045-2322
dc.identifier.other PURE UUID: f90b1f92-a1b8-406f-9ad6-2afdf70f0b72
dc.identifier.other PURE ITEMURL:
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dc.description.abstract Nanocomposite materials made from cellulose show a great potential as future high-performance and sustainable materials. We show how high aspect ratio cellulose nanofibrils can be efficiently aligned in extrusion to fibers, leading to increased modulus of toughness (area under the stress-strain curve), Young's modulus, and yield strength by increasing the extrusion capillary length, decreasing its diameter, and increasing the flow rate. The materials showed significant property combinations, manifesting as high modulus of toughness (~28-31 MJ/m3) vs. high stiffness (~19-20 GPa), and vs. high yield strength (~130-150 MPa). Wide angle X-ray scattering confirmed that the enhanced mechanical properties directly correlated with increased alignment. The achieved moduli of toughness are approximately double or more when compared to values reported in the literature for corresponding strength and stiffness. Our results highlight a possibly general pathway that can be integrated to gel-spinning process, suggesting thehypothesis that that high stiffness, strength and toughness can be achieved simultaneously, if the alignment is induced while the CNF are in the free-flowing state during the extrusion step by shear at relatively low concentration and in pure water, after which they can be coagulated. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Scientific Reports en
dc.relation.ispartofseries Volume 7, issue 1 en
dc.rights openAccess en
dc.subject.other General en
dc.subject.other 216 Materials engineering en
dc.title Aligning cellulose nanofibril dispersions for tougher fibers en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Bioproducts and Biosystems
dc.contributor.department Department of Applied Physics
dc.contributor.department Max Planck Institut fur Kolloid Und Grenzflachenforschung Potsdam
dc.subject.keyword General
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201710157214
dc.identifier.doi 10.1038/s41598-017-12107-x
dc.type.version publishedVersion

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