期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 107, 期 -, 页码 383-392出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2017.09.006
关键词
Cotton pulps; Cellulose carbamates; Regenerated cellulose fibers; Wet spinning; Dye properties
In this work, using cotton pulps and urea as raw materials, cellulose carbamates (CCs) were successfully prepared by liquid-solid phase in the high-boiling aprotic and polar solvent (DMAc). Regenerated cellulose (RC) fibers were successfully spun from cellulose carbamate in a NaOH aqueous solution by wet spinning on a conventional viscose filament device. And the structures and properties of products were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), Thermal gravimetric analysis (TG) and Scanning electron microscopy (SEM), rheology measurement and dye testing. The results showed that the CC can be quickly dissolved in 9%NaOH solution. RC fibers exhibited a bright surface and an approximately circular cross section. There was no lobulate shape and contained obvious pores and voids in the internal sections. RC fibers demonstrated a typical cellulose II crystal structure and a good thermal stability. And tensile strength of the RC fibers was 1.4 cN/dtex, and their elongation at break was 6.8%. Furthermore, the RC fibers showed excellent dyeing properties compared with viscose rayon and Yingli Lyocell. So, the described carbamate pathway provided a simple and environmentally friendly method to overcome the environmental drawbacks of the traditional viscose process. (C) 2017 Elsevier B.V. All rights reserved.
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