Projects per year
Abstract
The production of cellulose-based textile fibers with high toughness is vital for extending the longevity and thus developing a sustainable textile industry by reducing the global burden of microplastics. This study presented strategies to improve fiber toughness by tuning spinneret geometries. Experimental studies were conducted by spinning with different spinneret geometries and measuring the mechanical and structural properties of the spun fibers. In addition, numerical simulation tools were used to better understand the effects of spinneret geometry. The altering parameters of the spinneret geometries were the capillary diameters D, the angle of the entry cone into the spinning capillary, and the ratio of capillary length to diameter L/D. The highest fiber toughness could be achieved at a capillary aspect ratio of 1 to 2. The obtained maximum fiber toughness was 93 MPa with a tensile strength of 60 cN/tex and a concomitant elongation of 16.5%. For these fiber properties, a 13 wt% solution of a high-purity pulp with higher viscosity in [DBNH][OAc] was spun into a 1.3 dtex fiber using a D100 spinneret with a capillary of 1:1 length/diameter and an entrance angle of 8°. It was noticeable that the microvoid orientations decreased almost linearly with increasing toughness of the fibers. The morphologies of the fibers were similar regardless of the spinneret geometries and the raw materials used in the spinning process. In summary, by modulating the spinneret geometries, Ioncell fibers obtained high toughness that have the potential to replace synthetic fibers.
Original language | English |
---|---|
Pages (from-to) | 11165-11181 |
Number of pages | 17 |
Journal | Cellulose |
Volume | 28 |
Issue number | 17 |
Early online date | 7 Oct 2021 |
DOIs | |
Publication status | Published - Nov 2021 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Capillary aspect ratio of spinneret
- Dry-jet wet spinning
- Ioncell Technology
- Ionic liquid
- Man-made cellulose fibers
- Spinneret geometry
- Toughness of cellulose fiber
Fingerprint
Dive into the research topics of 'Spinneret geometry modulates the mechanical properties of man-made cellulose fibers'. Together they form a unique fingerprint.Projects
- 2 Finished
-
FinnCERES: Competence Center for the Materials Bioeconomy: A Flagship for our Sustainable Future
01/05/2018 → 31/12/2022
Project: Academy of Finland: Other research funding
-
Nano: Water-free, Low-Cost Click Modification and Oxidative Regeneration of (Nano)Celluloses
Sixta, H., Guizani, C., Johansson, L., Moriam, M. K., Schlapp-Hackl, I., Witos, J. & Fang, W.
01/09/2017 → 31/08/2021
Project: Academy of Finland: Other research funding