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Cellulose Nanofiber Orientation in Nanopaper and Nanocomposites by Cold Drawing
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
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2012 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 4, no 2, 1043-1049 p.Article in journal (Refereed) Published
Abstract [en]

To exploit the mechanical potential of native cellulose fibrils, we report on the preparation of nanopaper with preferred orientation of nanofibrillated cellulose (TEMPO-NFC) by cold drawing. The preparation route is papermaking-like and includes vacuum filtering of a TEMPO-oxidated NFC water dispersion, drawing in wet state and drying. The orientation of the fibrils in the nanopaper was assessed by AFM and wide-angle Xray diffraction analysis, and the effect on mechanical properties of the resulting nanopaper structure was investigated by tensile tests. At high. draw ratio, the degree of orientation is as high as 82 and 89% in and cross-sectional planes of the nanopaper, respectively, and the Young's modulus is 33 GPa. This is much higher than mechanical properties of isotropic nanopaper. The cold drawing method can be also applied to NFC nanocomposites as demonstrated, by preparation of TEMPO-NFC/hydroxyethyl cellulose (HEC) nanocomposites. The introduction of the soft HEC matrix allows further tailoring of the mechanical properties.

Place, publisher, year, edition, pages
2012. Vol. 4, no 2, 1043-1049 p.
Keyword [en]
nanopaper, cellulose nanofibers, orientation, cold drawing, nanocomposites, nanofibrillated cellulose
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-93015DOI: 10.1021/am2016766ISI: 000300644500079Scopus ID: 2-s2.0-84857432905OAI: oai:DiVA.org:kth-93015DiVA: diva2:514875
Note
QC 20120411Available from: 2012-04-11 Created: 2012-04-10 Last updated: 2017-12-07Bibliographically approved

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Berglund, Lars A.

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Sehaqui, HoussineMushi, Ngesa EzekielMorimune, SeiraSalajkova, MichaelaBerglund, Lars A.
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Fibre and Polymer TechnologyWallenberg Wood Science Center
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ACS Applied Materials and Interfaces
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