Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 2, Issue 11, Pages 2604-2612Publisher
AMER CHEMICAL SOC
DOI: 10.1021/sc500559g
Keywords
Cellulose filaments; Cellulose carbamate; Orientation; Mechanical properties; Dye properties
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Funding
- National Natural Science Foundation of China [51273151]
- Program for New Century Excellent Talents in University [NCET-11-0415]
- Natural Science Foundation of Hubei Province [2009CDA040]
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In this work, regenerated cellulose (RC) filaments were successfully spun from cellulose carbamate in a NaOH/ZnO aqueous solution on a pilot scale. The structure and properties of the RC filaments were characterized using SEM, FT-IR, elemental analysis, C-13 NMR, XRD, 2D WAXD, tensile testing, and dye testing. The nitrogen-free and sulfur-free RC filaments exhibited a bright surface and circular cross section. The filaments demonstrated a typical cellulose II crystal structure and a relatively high degree of orientation. Improved tenacity and structure were obtained in the RC fibers due to improved post-processing spinning steps and an increased drawing ratio. The tenacity of the fibers was determined in the range of 1.69-2.36 cN/dtex, which was comparable with that of commercial viscose rayon. Furthermore, the RC filaments showed improved dye properties compared with viscose rayon. The described carbamate pathway provided a simple and environmentally friendly method, offering an alternate to the environmental drawbacks of the viscose process.
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