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Cellulose

, Volume 15, Issue 1, pp 59–66 | Cite as

Dissolution and forming of cellulose with ionic liquids

  • Birgit Kosan
  • Christoph Michels
  • Frank Meister
Article

Abstract

The dissolution of cellulose in different ionic liquids will be described as a very recent subject for a direct dissolving process, which was used to prepare regenerated cellulose fibres. The preparation of the dopes was arranged starting from slurry of cellulose in the aqueous ionic liquid by removing the water at elevated temperature, vacuum and high shearing rates. As ionic liquids, the 1-N-Butyl-3-methylimidazolium chloride, the 1-Ethyl-3-methylimidazolium chloride, the 1-N-Butyl-2,3-dimethylimidazolium chloride, the 1-N-Butyl-3-methylimidazolium acetate and the 1-Ethyl-3-methylimidazolium acetate were investigated. The cellulose solutions in ionic liquids were characterised by means of light microscopy, cone-plate rheometry and particle analysis. In addition these results were compared with cellulose solutions in N-methyl-morpholine-N-oxide monohydrate. Finally the cellulose dopes were shaped by a dry-wet spinning process to manufacture cellulose fibres. The properties of the resulted fibre had been determined and will be discussed.

Keywords

Cellulose dissolution Cellulose fibre Dry-wet spinning process Ionic liquid Solution state 

Notes

Acknowledgement

These works were financially supported by the German Federal Ministry of Economics and Technology (BMWA No. IW050050).

Furthermore the authors thank A. Stark (Institute for Technical and Environmental Chemistry, Jena) for the preparation of 1-N-Butyl-2,3-dimethylimidazolium chloride.

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Birgit Kosan
    • 1
  • Christoph Michels
    • 1
  • Frank Meister
    • 1
  1. 1.Thüringisches Institut für Textil- und Kunststoff-Forschung e.V.RudolstadtGermany

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