AI Article Synopsis
- Cellulose nanofiber (CNF) is strong but short; this study develops a process to create longer cellulose fibers suitable for eco-friendly composites.
- The method involves spinning, stretching, and drying CNF isolated from hardwood pulp using TEMPO oxidation, with varying spinning speeds and stretching ratios.
- Results show these long fibers possess impressive mechanical properties, including a tensile modulus of 23.9 GPa and tensile strength of 383.3 MPa, indicating they are both strong and tough.
Article Abstract
Cellulose nanofiber (CNF) with high crystallinity has great mechanical stiffness and strength. However, its length is too short to be used for fibers of environmentally friendly structural composites. This paper presents a fabrication process of cellulose long fiber from CNF suspension by spinning, stretching and drying. Isolation of CNF from the hardwood pulp is done by using (2, 2, 6, 6-tetramethylpiperidine-1-yl) oxidanyl (TEMPO) oxidation. The effect of spinning speed and stretching ratio on mechanical properties of the fabricated fibers are investigated. The modulus of the fabricated fibers increases with the spinning speed as well as the stretching ratio because of the orientation of CNFs. The fabricated long fiber exhibits the maximum tensile modulus of 23.9 GPa with the maximum tensile strength of 383.3 MPa. Moreover, the fabricated long fiber exhibits high strain at break, which indicates high toughness. The results indicate that strong and tough cellulose long fiber can be produced by using ionic crosslinking, controlling spinning speed, stretching and drying.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5732198 | PMC |
| http://dx.doi.org/10.1038/s41598-017-17713-3 | DOI Listing |
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