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Hydrodynamic alignment and assembly of nanofibrils resulting in strong cellulose filaments

Nature communications, 2014-06, Vol.5 (1), p.4018, Article 4018 [Peer Reviewed Journal]

Copyright Nature Publishing Group Jun 2014 ;Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. 2014 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/ncomms5018 ;PMID: 24887005

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Title:
Hydrodynamic alignment and assembly of nanofibrils resulting in strong cellulose filaments
Author: Håkansson, Karl M O ; Fall, Andreas B ; Lundell, Fredrik ; Yu, Shun ; Krywka, Christina ; Roth, Stephan V ; Santoro, Gonzalo ; Kvick, Mathias ; Prahl Wittberg, Lisa ; Wågberg, Lars ; Söderberg, L Daniel
Subjects: Biocompatible Materials ; Birefringence ; Cellulose ; Current International Research ; Fibers ; Flow ; Hydrodynamics ; Microchannels ; Microfibril Angle ; Nanocomposites ; Nanofibers ; Nanopaper ; Nanostructures ; Rotational Diffusion ; Water ; Wood ; Wood Cell-Walls
Is Part Of: Nature communications, 2014-06, Vol.5 (1), p.4018, Article 4018
Description: 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.
Publisher: England: Nature Publishing Group
Language: English
Identifier: ISSN: 2041-1723
EISSN: 2041-1723
DOI: 10.1038/ncomms5018
PMID: 24887005
Source: MEDLINE
PubMed Central
ProQuest Central

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Hydrodynamic alignment and assembly of nanofibrils resulting in strong cellulose filaments

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