title: High-Strength Composite Fibers from Cellulose-Lignin Blends Regenerated from Ionic Liquid Solution.
abstract: Composite fibres that contain cellulose and lignin were produced from ionic liquid solutions by dry-jet wet spinning. Eucalyptus dissolving pulp and organosolv/kraft lignin blends in different ratios were dissolved in the ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate to prepare a spinning dope from which composite fibres were spun successfully. The composite fibres had a high strength with slightly decreasing values for fibres with an increasing share of lignin, which is because of the reduction in crystallinity. The total orientation of composite fibres and SEM images show morphological changes caused by the presence of lignin. The hydrophobic contribution of lignin reduced the vapour adsorption in the fibre. Thermogravimetric analysis curves of the composite fibres reveal the positive effect of the lignin on the carbonisation yield. Finally, the composite fibre was found to be a potential raw material for textile manufacturing and as a precursor for carbon fibre production.
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076, Aalto, Finland.
authors.forename: Yibo
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076, Aalto, Finland.
authors.forename: Shirin
authors.initials: S
authors.lastname: Asaadi
authors.affiliation: HYBER, the Academy of Finland's Centre of Excellence in Molecular Engineering of Biosynthetic Hybrid Materials research, Aalto University, P.O. Box 16300, 00076, Aalto, Finland.
authors.forename: Leena-Sisko
authors.initials: LS
authors.lastname: Johansson
authors.affiliation: Division of Material physics Department of Physics, Helsinki University, P.O. Box 64, FI-00014, Finland.
authors.forename: Patrik
authors.initials: P
authors.lastname: Ahvenainen
authors.affiliation: Department of Applied Physics, School of Science, Aalto University, P.O. Box 15100, 00076, Aalto, Finland.
authors.forename: Mehedi
authors.initials: M
authors.lastname: Reza
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076, Aalto, Finland.
authors.forename: Marina
authors.initials: M
authors.lastname: Alekhina
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076, Aalto, Finland.
authors.forename: Lauri
authors.initials: L
authors.lastname: Rautkari
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076, Aalto, Finland.
authors.forename: Anne
authors.initials: A
authors.lastname: Michud
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076, Aalto, Finland.
authors.forename: Lauri
authors.initials: L
authors.lastname: Hauru
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076, Aalto, Finland.
authors.forename: Michael
authors.initials: M
authors.lastname: Hummel
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076, Aalto, Finland. herbert.sixta@aalto.fi.
authors.forename: Herbert
authors.initials: H
authors.lastname: Sixta
mesh_terms: D002244:Carbon / Q000737:chemistry; D000077482:Carbon Fiber; D002482:Cellulose / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D012996:Solutions; D013718:Tensile Strength; D013784:Textiles; D014835:Volatilization
chemical_list: D000077482:Carbon Fiber; D052578:Ionic Liquids; D012996:Solutions; D002244:Carbon; C076151:Kraft lignin; D002482:Cellulose; D008031:Lignin
keywords: biomass; dyes/pigments; fibers; ionic liquids; organosolv