Hydrodynamic alignment and assembly of nanofibrils resulting in strong cellulose filaments

Håkansson, Karl (author): KTH,Mekanik,Wallenberg Wood Science Center,Linné Flow Center, FLOW,KTH Royal Institute of Technology, Sweden

Fall, Andreas (author): KTH,Fiberteknologi,Wallenberg Wood Science Center,KTH Royal Institute of Technology, Sweden

Lundell, Fredrik (author): KTH,Mekanik,Wallenberg Wood Science Center,Linné Flow Center, FLOW,KTH Royal Institute of Technology, Sweden

Krywka, Christina (author): Institute of experimental and applied physics. Kiel Germany,University of Kiel, Germany; Helmholtz-Zentrum Geesthacht, Germany

Kvick, Mathias (author): KTH,Mekanik,Wallenberg Wood Science Center,Linné Flow Center, FLOW,KTH Royal Institute of Technology, Sweden

Prahl Wittberg, Lisa (author): KTH,Mekanik,Wallenberg Wood Science Center,Linné Flow Center, FLOW,KTH Royal Institute of Technology, Sweden

Wågberg, Lars (author): KTH,Fiberteknologi,Wallenberg Wood Science Center,KTH Royal Institute of Technology, Sweden

Söderberg, Daniel (author): RISE,KTH,Mekanik,Wallenberg Wood Science Center,Linné Flow Center, FLOW,Innventia AB, Stockholm Sweden,Innventia,KTH Royal Institute of Technology, Sweden

(creator_code:org_t)

2014-06-02
2014
English.
In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 5, s. 4018-

Related links:: https://www.nature.c...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; https://urn.kb.se/re...; show less...

Abstract Subject headings

Cellulose nanofibrils can be obtained from trees and have considerable potential as a building block for biobased materials. In order to achieve good properties of these materials, the nanostructure must be controlled. Here we present a process combining hydrodynamic alignment with a dispersion-gel transition that produces homogeneous and smooth filaments from a low-concentration dispersion of cellulose nanofibrils in water. The preferential fibril orientation along the filament direction can be controlled by the process parameters. The specific ultimate strength is considerably higher than previously reported filaments made of cellulose nanofibrils. The strength is even in line with the strongest cellulose pulp fibres extracted from wood with the same degree of fibril alignment. Successful nanoscale alignment before gelation demands a proper separation of the timescales involved. Somewhat surprisingly, the device must not be too small if this is to be achieved.

NATURVETENSKAP -- Kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)

By the author/editor: Håkansson, Karl; Fall, Andreas; Lundell, Fredrik; Yu, Sun; Krywka, Christin ...; Roth, Stephan; show more...; Santoro, Gonzalo; Kvick, Mathias; Prahl Wittberg, ...; Wågberg, Lars; Söderberg, Danie ...; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Fluid Mechanics ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Paper Pulp and F ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Organic Chemistr ...

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