Abstract
We developed a spinning approach for a dope produced by treating softwood pulp with a deep eutectic solvent (DES). The DES enables formation of a sufficiently viscous spinnable gel-like suspension of fibers, which solidifies upon the removal of the DES. This solidification, however, requires a longer time compared to most conventional wet spinning processes. Consequently, the continuity of the spinning process has been constrained in previous work. Moreover, the ability to draw the incipient yarn to increase orientation has been limited. Here we present a continuous spinning approach where the fiber yarn properties and processability can be improved using an inclined channel. A combination of an air gap and an inclined ethanol stream transports and draws the incipient fiber yarn during spinning. The influence of syringe tip diameter, angle of the channel, ethanol flow rate, and twisting were studied experimentally. The improvements in the spinning process resulted in an increase in load bearing capability and ability to reduce the linear density of the fiber yarn.
| Original language | English |
|---|---|
| Pages (from-to) | 10918-10926 |
| Number of pages | 9 |
| Journal | ACS Omega |
| Volume | 3 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 30 Sept 2018 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work was conducted as part of the Design Driven Value Chains in the World of Cellulose (DWoC) project. The authors wish to thank TEKES (Finnish Funding Agency for Technology and Innovation) for financial support. We would like to acknowledge the contribution of Vuokko Liukkonen, Kirsi Kale, and Tiia-Maria Tenhunen for help in designing the spinning line prototype. Furthermore, we thank Marja Karkkäinen and Steven Spoljaric for help with yarn measurements.