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Structural analysis of Ioncell-F fibres from birch wood

Asaadi, Shirin; Hummel, Michael; Ahvenainen, Patrik; Gubitosi, Marta LU ; Olsson, Ulf LU and Sixta, Herbert (2018) In Carbohydrate Polymers 181. p.893-901
Abstract

Quite recently, the Ioncell-F process, a novel and promising Lyocell fibre process, has been developed. The ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) utilized in this process, was identified as an excellent cellulose solvent for dry-jet wet fibre spinning. Fibres spun from cellulose-[DBNH]OAc solution have shown excellent mechanical properties. Herein, various structural features of these ionic liquid-based fibres were analyzed and correlated with their mechanical properties. The highest slope of tenacity increase of these Ioncell-F fibres (from birch wood) observed at low draw ratios (DRs), while a continuous but slower increase occurs to partly very high draws. The improvements in the mechanical properties do... (More)

Quite recently, the Ioncell-F process, a novel and promising Lyocell fibre process, has been developed. The ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) utilized in this process, was identified as an excellent cellulose solvent for dry-jet wet fibre spinning. Fibres spun from cellulose-[DBNH]OAc solution have shown excellent mechanical properties. Herein, various structural features of these ionic liquid-based fibres were analyzed and correlated with their mechanical properties. The highest slope of tenacity increase of these Ioncell-F fibres (from birch wood) observed at low draw ratios (DRs), while a continuous but slower increase occurs to partly very high draws. The improvements in the mechanical properties do not seem to correlate with changes in the crystallite size or the crystalline orientation based on wide-angle X-ray scattering (WAXS) results. More significant differences were seen for the sample crystallinity, the amorphous orientation (measured by birefringence), the orientation of the voids, the specific surface (measured by small-angle X-ray scattering (SAXS)), and the sorption/desorption properties of the fibres.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cellulose structure, Ioncell-F, Regenerated cellulose fibres, X-ray scattering
in
Carbohydrate Polymers
volume
181
pages
893 - 901
publisher
Elsevier
external identifiers
  • scopus:85035072866
  • wos:000418661000104
ISSN
0144-8617
DOI
10.1016/j.carbpol.2017.11.062
language
English
LU publication?
yes
id
b3b8c057-9c3e-481b-85e6-5bd0a83bbec5
date added to LUP
2017-12-11 12:34:16
date last changed
2018-10-07 05:02:44
@article{b3b8c057-9c3e-481b-85e6-5bd0a83bbec5,
  abstract     = {<p>Quite recently, the Ioncell-F process, a novel and promising Lyocell fibre process, has been developed. The ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) utilized in this process, was identified as an excellent cellulose solvent for dry-jet wet fibre spinning. Fibres spun from cellulose-[DBNH]OAc solution have shown excellent mechanical properties. Herein, various structural features of these ionic liquid-based fibres were analyzed and correlated with their mechanical properties. The highest slope of tenacity increase of these Ioncell-F fibres (from birch wood) observed at low draw ratios (DRs), while a continuous but slower increase occurs to partly very high draws. The improvements in the mechanical properties do not seem to correlate with changes in the crystallite size or the crystalline orientation based on wide-angle X-ray scattering (WAXS) results. More significant differences were seen for the sample crystallinity, the amorphous orientation (measured by birefringence), the orientation of the voids, the specific surface (measured by small-angle X-ray scattering (SAXS)), and the sorption/desorption properties of the fibres.</p>},
  author       = {Asaadi, Shirin and Hummel, Michael and Ahvenainen, Patrik and Gubitosi, Marta and Olsson, Ulf and Sixta, Herbert},
  issn         = {0144-8617},
  keyword      = {Cellulose structure,Ioncell-F,Regenerated cellulose fibres,X-ray scattering},
  language     = {eng},
  pages        = {893--901},
  publisher    = {Elsevier},
  series       = {Carbohydrate Polymers},
  title        = {Structural analysis of Ioncell-F fibres from birch wood},
  url          = {http://dx.doi.org/10.1016/j.carbpol.2017.11.062},
  volume       = {181},
  year         = {2018},
}