Abstract
Regenerated cellulose fibers were produced by dry-jet wet spinning from cellulose/1,5-diazabicyclo[4.3.0]non-5-ene-1-ium acetate solutions. Cellulose blends with different molar mass distribution but fixed intrinsic viscosity were employed as starting materials to investigate the influence of the cellulose molecular structure on the spinnability and the mechanical properties of the resulting fibers. The cellulose/ionic liquid solutions were prepared from blends constituted of cotton linters and spruce sulfite pulp representing a polydispersity index from 2.0 to 5.9. Dynamic shear rheology was performed on the solutions to examine the effect of cellulose chain distribution on the visco-elastic behavior and to select the adequate temperature for stable spinning. The mechanical and physical properties of the resulting fibers were determined by tensile tests and birefringence measurements. Cellulose solutes having a share of high molecular weight cellulose (DP > 2000) higher than 20% and a minimum polydispersity index of 3.4 showed enhanced spinnability. Higher draw ratios were accessible, resulting in improved cellulose chain total orientation and high-tenacity fibers.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
