Regenerated cellulose fibers were successfully wet-spun from a cellulose/NaOH/thiourea/urea aqueous solution by an efficient extrusion dissolution method. The structure changes of these regenerated cellulose fibers that occurred during wet spinning process had been investigated by field-emission scanning electron microscope, carbon nuclear magnetic resonance spectroscopy (13C-NMR), attenuated total reflection infrared spectroscopy and the corresponding two-dimensional spectroscopy, wide-angle-X-ray-diffraction, small-angle-X-ray scattering (SAXS), tensile testing, and thermogravimetric analysis. Results revealed that higher crystallinity and orientation were obtained because of the improved post-processing, while the annealed fiber exhibited lower crystallinity and orientation, owing to a disruption of some oriented crystallites and heat shrinkage during hot air drawing process. SAXS results indicated that the microvoid in the cellulose fibers were smaller with the spinning process, and the pore structure had a more significant impact on the mechanical properties of the regenerated cellulose fibers. Moreover, an increased tensile strength (2.40 cN/dtex) and elongation at break (8.20%) in dry state were obtained in regenerated cellulose fibers due to heat treatment process. Therefore, the structure development contributed toward the improvement of the tensile strength, modulus and thermal stability of the regenerated cellulose fibers during spinning process. On the other hand, a simple, environmentally friendly pathway was proposed for cellulose regeneration, which could significantly affect the cellulose regeneration in current industries.
Cellulose – Springer Journals
Published: Feb 3, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
All the latest content is available, no embargo periods.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud