Development of a novel process for the production of man-made cellulosic fibers from ionic liquid solution

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Hummel, Michael, Dr., Aalto University, Department of Forest Products Technology, Finland Michud, Anne 2016-05-26T09:01:39Z 2016-05-26T09:01:39Z 2016
dc.identifier.isbn 978-952-60-6805-3 (electronic)
dc.identifier.isbn 978-952-60-6804-6 (printed)
dc.identifier.issn 1799-4942 (electronic)
dc.identifier.issn 1799-4934 (printed)
dc.identifier.issn 1799-4934 (ISSN-L)
dc.description.abstract This study presents the development of a novel process for producing man-made cellulosic fibers from an ionic liquid solution, the so called Ioncell-F process. It examines the full production chain from efficient dissolution of cellulose in ionic liquid to the suitability of the spun fibers for textile applications. A dry-jet wet spinning process consisting of the extrusion of a polymer solution at mild temperature through a multi-filament spinneret into an aqueous coagulation bath via an air gap was employed for the regeneration of cellulose into filaments. For preparation of the spinning dopes, 1-ethyl-3-methylimidazolium acetate and 1,5-diazabicyclo[4.3.0]non-5-enium acetate were used as solvents for different commercial dissolving pulps. Both ionic liquids showed an excellent capability in dissolving cellulose at mild conditions. Minor cellulose depolymerization was obtained at a temperature below 85 ºC with a low shearing rate. The intrinsic properties of the dissolved raw material, such as the degree of polymerization and molar mass distribution, exhibited a significant influence on the viscoelastic properties of the resulting polymer solution, and were monitored by oscillatory shear rheology and extensional rheology. The viscoelastic properties of the cellulose/ionic solution played a key role in determining the so called "spinning window" required to achieve optimal spinnability. The tested 1-ethyl-3-methylimidazolium acetate/cellulose solution showed poor processing ability, while the 1,5-diazabicyclo[4.3.0]non-5-enium acetate/cellulose solution revealed effective spinning capability, resulting in the production of high-tenacity cellulosic staple fibers. The fundamental spinning concepts were investigated and contributed to the determination of the spinning window. Cellulosic fibers, covering a wide spectrum of structural and mechanical properties, were manufactured by varying the applied stretch of the extruded filaments. Ioncell fibers belong to the category of Lyocell fibers, provided that they are produced commercially, and display appropriate structural and mechanical behavior to be converted into yarn, and subsequently converted to knitted and woven fabrics. The excellent performance of the Ioncell spun yarn during the knitting and weaving process confirmed the competitive quality of the yarn and its suitability for the production of apparel. The future of this technology as an alternative to the viscose and NMMO-based Lyocell processes is promising, based on the development of a viable solvent-recovery step. en
dc.format.extent 85 + app. 57
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Aalto University en
dc.publisher Aalto-yliopisto fi
dc.relation.ispartofseries Aalto University publication series DOCTORAL DISSERTATIONS en
dc.relation.ispartofseries 90/2016
dc.relation.haspart [Publication 1]: Anne Michud, Michael Hummel, Simon Haward and Herbert Sixta. 2015. Monitoring of cellulose depolymerization in 1-ethyl-3-methylimidazolium acetate by shear and elongational rheology. Carbohydrate Polymers, 117, 355-363. DOI: 10.1016/j.carbpol.2014.09.075
dc.relation.haspart [Publication 2]: Anne Michud, Marjaana Tanttu, Shirin Asaadi, Yibo Ma, Eveliina Netti, Pirjo Kääriäinen, Anders Persson, Anders Berntsson, Michael Hummel and Herbert Sixta. 2016. Ioncell-F: ionic liquid-based cellulosic textile fibers as an alternative to viscose and Lyocell. Textile Research Journal, 86(5), 543-552. DOI: 10.1177/0040517515591774
dc.relation.haspart [Publication 3]: Anne Michud, Michael Hummel and Herbert Sixta. 2015. Influence of molar mass distribution on the final properties of fibers regenerated from cellulose dissolved in ionic liquid by dry-jet wet spinning. Polymer, 75, 1-9. DOI: 10.1016/j.polymer.2015.08.017
dc.relation.haspart [Publication 4]: Anne Michud, Michael Hummel and Herbert Sixta. 2016. Influence of process parameters on the structure formation of man-made cellulosic fibers from ionic liquid solution. Journal of Applied Polymer Science, 133(30). DOI: 10.1002/APP.43718
dc.subject.other Paper technology en
dc.title Development of a novel process for the production of man-made cellulosic fibers from ionic liquid solution en
dc.type G5 Artikkeliväitöskirja fi Kemian tekniikan korkeakoulu fi School of Chemical Technology en
dc.contributor.department Puunjalostustekniikan laitos fi
dc.contributor.department Department of Forest Products Technology en
dc.subject.keyword cellulose en
dc.subject.keyword ionic liquid en
dc.subject.keyword dry-jet wet spinning en
dc.subject.keyword man-made cellulosic fibers en
dc.subject.keyword biorefineries en
dc.identifier.urn URN:ISBN:978-952-60-6805-3
dc.type.dcmitype text en
dc.type.ontasot Doctoral dissertation (article-based) en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.contributor.supervisor Sixta, Herbert, Prof., Aalto University, Department of Forest Products Technology, Finland
dc.opn Fink, Hans-Peter, Prof., Fraunhofer-Institute for Applied Polymer Research, Germany
dc.contributor.lab Biorefineries en
dc.rev Chanzy, Henri, Prof., CNRS-CERMAV, France
dc.rev Hermanutz, Frank, Dr., ITCF, Germany 2016-06-10

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