Ioncell-F: ionic liquid-based cellulosic textile fibers as an alternative to viscose and Lyocell

Anne Michud*, Marjaana Tanttu, Shirin Asaadi, Yibo Ma, Eveliina Netti, Pirjo Kääriäinen, Anders Persson, Anders Berntsson, Michael Hummel, Herbert Sixta

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

73 Citations (Scopus)


Ioncell-F, a recently developed process for the production of man-made cellulosic fibers from ionic liquid solutions by dry-jet wet spinning, is presented as an alternative to the viscose and N-methylmorpholine N-oxide (NMMO)-based Lyocell processes. The ionic liquid 1,5-diazabicyclo[4.3.0]non-5-ene acetate was identified as excellent cellulose solvent allowing for a rapid dissolution at moderate temperatures and subsequent shaping into continuous filaments. The highly oriented cellulose fibers obtained upon coagulation in cold water exhibited superior tenacity, exceeding that of commercial viscose and NMMO-based Lyocell (Tencel®) fibers. The respective staple fibers, which have been converted into two-ply yarn by ring spinning technology, presented very high tenacity. Furthermore, the Ioncell yarn showed very good behavior during the knitting and weaving processes, reflecting the quality of the produced yarn. The successfully knitted and woven garments from the Ioncell yarn demonstrate the suitability of this particular ionic liquid for the production of man-made cellulosic fibers and thus give a promising outlook for the future of the Ioncell-F process.

Original languageEnglish
Pages (from-to)543-552
Number of pages10
Issue number5
Publication statusPublished - 1 Mar 2016
MoE publication typeA1 Journal article-refereed


  • cellulose
  • dry-jet wet spinning
  • fiber-yarn-fabric formation
  • Ioncell-F process
  • ionic liquid
  • N-methylmorpholine N-oxide-based Lyocell
  • viscose

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