Optimization of Dry-Jet Wet Spinning of Regenerated Cellulose Fibers Using [mTBDH][OAc] as a Solvent
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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ACS Omega, Volume 8, issue 37, pp. 34103–34110
Abstract
Superbase-based ionic liquids (ILs) have demonstrated excellent dissolution capability for cellulose, and employing the dry-jet wet spinning process, high-tenacity regenerated textile fibers have been made. Among a range of superbase-based ILs, [mTBDH][OAc] exhibited not only good spinnability but also exceptional recyclability, making it highly suitable for a closed-loop production of regenerated cellulose fibers. To further optimize the spinning process, we investigated the influence of the cellulosic raw materials and the IL with residual water on spinnability and fiber properties. In addition, single-filament spinning and multifilament spinning using spinnerets with different hole densities were investigated to reveal the upscaling challenges of the dry-jet wet spinning process. The air gap conditions, for example, temperature and moisture concentration were simulated using COMSOL multiphysics. The results indicate that the presence of a small amount of water (3 wt%) in the IL has a positive effect on spinnability, while the mechanical properties of the fibers remain unchanged.Description
This project is funded by Academy of Finland Project WTF-Click-Nano 13311267. We express our gratitude for the provision of facilities and technical support by Aalto University at OtaNano–Nanomicroscopy Center (Aalto-NMC). In addition, we extend our thanks to Leena Pitkänen and Quang Lê Huy for their assistance with pulp analysis, as well as to Petri Uusi-Kyyny for discussions regarding the vapor–liquid equilibrium in the [mTBDH][OAc] and water system.
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Fang, W, Lim, E Y, Nieminen, K & Sixta, H 2023, 'Optimization of Dry-Jet Wet Spinning of Regenerated Cellulose Fibers Using [mTBDH][OAc] as a Solvent', ACS Omega, vol. 8, no. 37, pp. 34103–34110. https://doi.org/10.1021/acsomega.3c05133