Influence of process parameters on the structure formation of man-made cellulosic fibers from ionic liquid solution

Anne Michud, Michael Hummel, Herbert Sixta*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

The influence of dry-jet wet spinning parameters on the production of man-made cellulosic fibers from 13 wt % cellulose/1,5-diazabicyclo[4.3.0]non-5-ene acetate solutions was investigated. The spinneret nozzle diameter, extrusion velocity, draw ratio, and coagulation bath temperature were the studied parameters. The production of highly oriented fibers was favored by selecting higher extrusion velocity and lower spinneret diameter. A spinneret size of 100 μm and a draw ratio of 6 were sufficient to highly orient the cellulose macromolecules and achieve tenacities above 40 cN/tex (600 MPa). Total orientation assessed via birefringence measurement, tenacity, and Young's modulus values reached a plateau at a draw of 6 and no further development in properties was observed. A temperature of the aqueous coagulation bath of 15°C slightly promoted greater orientation of the fibers by hampering structural changes of the cellulose macromolecules in the nascent solid fibers. Furthermore, the determination of the elongational viscosity of the liquid thread via the measurement of radial force tensor was tested and showed promising results.

Original languageEnglish
Article number43718
JournalJournal of Applied Polymer Science
Volume133
Issue number30
DOIs
Publication statusPublished - 10 Aug 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • mechanical properties
  • morphology
  • rubber
  • viscosity and viscoelasticity

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