Effects of ultraviolet irradiation on stabilization of textile-grade polyacrylonitrile fibers without photo-initiator for preparing carbon fibers
- Effects of ultraviolet irradiation on stabilization of textile-grade polyacrylonitrile fibers without photo-initiator for preparing carbon fibers
- 이성호; 조아영; 유승화; 정용식
- Textile-grade polyacrylonitrile; Ultraviolet irradiation; Stabilization; Carbon fibers
- Issue Date
- VOL 144-448
- The ultraviolet (UV) was irradiated on textile-grade polyacrylonitrile (PAN) fibers without photo-initiators to demonstrate the effective stabilization for preparing carbon fibers (CFs). The irradiation for as short as 20  min  at 75  °C generated radicals in the textile-grade PAN fibers, which accelerate stabilization, resulting in significant reduction of process time. In addition, stepwise irradiations from 75 to 200  °C by increasing UV power, and following thermal treatments to mimic continuous stabilization for 30  min total provided CFs with tensile strength and modulus of 2.43  ±  0.4 and 195  8.6  GPa. Considering conventional thermal stabilization for at least 60  min and 5  h with special and textile PAN fibers, respectively, the incorporation of UV irradiation into the present system could effectively advance stabilization process to shorten duration and to produce low-cost CFs based on textile-grade PAN fibers as one of cheap precursors.
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