Recycling of Superbase-Based Ionic Liquid Solvents for the Production of Textile-Grade Regenerated Cellulose Fibers in the Lyocell Process

Show full item record



Permalink

http://hdl.handle.net/10138/333626

Citation

Elsayed , S , Helminen , J , Hellsten , S , Guizani , C , Witos , J , Rissanen , M , Rantamäki , A H , Hyväri , P , Varis , P , Wiedmer , S K , Kilpeläinen , I & Sixta , H 2020 , ' Recycling of Superbase-Based Ionic Liquid Solvents for the Production of Textile-Grade Regenerated Cellulose Fibers in the Lyocell Process ' , ACS Sustainable Chemistry & Engineering , vol. 8 , no. 37 , pp. 14217-14227 . https://doi.org/10.1021/acssuschemeng.0c05330

Title: Recycling of Superbase-Based Ionic Liquid Solvents for the Production of Textile-Grade Regenerated Cellulose Fibers in the Lyocell Process
Author: Elsayed, Sherif; Helminen, Jussi; Hellsten, Sanna; Guizani, Chamseddine; Witos, Joanna; Rissanen, Marja; Rantamäki, Antti H.; Hyväri, Paulus; Varis, Pauliina; Wiedmer, Susanne K.; Kilpeläinen, Ilkka; Sixta, Herbert
Contributor organization: Department of Chemistry
HUS Head and Neck Center
Helsinki Institute of Sustainability Science (HELSUS)
Susanne Wiedmer / Principal Investigator
Synthesis and Analysis
Date: 2020-09-21
Language: eng
Number of pages: 11
Belongs to series: ACS Sustainable Chemistry & Engineering
ISSN: 2168-0485
DOI: https://doi.org/10.1021/acssuschemeng.0c05330
URI: http://hdl.handle.net/10138/333626
Abstract: Ioncell is a Lyocell based technology for the production of manmade cellulose fibers. This technology exploits the intrinsic dissolution power of superbase-based ionic liquids (ILs) toward cellulose and the ability to form spinnable cellulose solutions. The regenerated fibers are produced via a dry-jet wet spinning process in which the cellulose filaments are stretched in an air gap before regenerating in an aqueous coagulation medium. For the commercialization of this process, it is essential to demonstrate the quantitative recovery of the solvent from the coagulation bath without impairing its solvation power. This study reports on the spinnability and recyclability of the IL 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-enium acetate ([mTBDH][OAc]) over five cycles in comparison to 1,5-diaza-bicyclo[4.3.0]non-5-enium acetate ([DBNH][OAc]). The aqueous IL solutions were recovered from the coagulation bath by successive thermal treatments under reduced pressure. Accordingly, the recycled ILs were utilized to dissolve 13 wt % cellulose pulp in each cycle without the addition of make-up IL. While using [mTBDH][OAc], the pulp was completely dissolved and processed into easily spinnable cellulose solutions during all five cycles, whereas the ability to dissolve pulp was completely lost after the first recovery cycle when using [DBNH][OAc]. The composition of the recovered ILs and extent of side-products generated in the adopted process was analyzed in detail. This includes characterization of the rheological properties of the solutions as well as the macromolecular and mechanical properties of the regenerated fibers. In addition, we review the toxicity of both solvents using Vibrio fischeri bacteria. Finally, the spun fibers from all [mTBDH][OAc] spinning trials were combined to produce a demonstration dress (Paju), designed and sewn by Marimekko Design House in Finland.
Description: This article has a correction concerning the authors: We regret that there is an error with the author list in our original article. The authors Jussi Helminen, Paulus Hyväri, and Ilkka Kilpeläinen, all with the Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland, were mistakenly omitted. The author list should be as shown above in this Addition and Correction. DOI 10.1021/acssuschemeng.0c07773
Subject: Lyocell
regenerated fibers
MMCFs
ionic liquids
ioncell
solvent recovery
SOLVATOCHROMIC COMPARISON METHOD
IN-SITU CRYSTALLIZATION
IONCELL-F
SCALE
VAPORIZATION
ACETONITRILE
DISSOLUTION
RECOVERY
BASICITY
WATER
116 Chemical sciences
114 Physical sciences
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: acceptedVersion


Files in this item

Total number of downloads: Loading...

Files Size Format View
Recycling_of_superbase_based.pdf 1.186Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record