| 초록 |
Lyocell process using NMMO as a solvent provides a naturally-friendly, less toxic, relatively simple method for producing regenerated cellulose fiber. Conventional wood pulp based Lyocell, however, has several fatal demerits such as forest destruction and easy fibrillation in the wet state. To solve these problems, we prepared a new regenerated cellulose fiber from a different cellulosic source, cotton linter pulp, using a custom-made lab scale dry jet-wet spinning apparatus. In this study, we investigated the effects of the molecular weight of cotton linter, dope concentration, and take-up speed on fibrillation tendency of as-spun fibers and compared them with commercial wood pulp based Lyocell. Furthermore, the effect of additional spinning conditions such as composition of coagulation bath and L/D ratio of spinneret on mechanical properties of spun fibers and the fiber properties such as birefringence, crystallinity, and crystalline orientation index were also investigated. |
