Effects of ultraviolet irradiation on stabilization of textile-grade polyacrylonitrile fibers without photo-initiator for preparing carbon fibers

Title
Effects of ultraviolet irradiation on stabilization of textile-grade polyacrylonitrile fibers without photo-initiator for preparing carbon fibers
Authors
이성호조아영유승화정용식
Keywords
Textile-grade polyacrylonitrile; Ultraviolet irradiation; Stabilization; Carbon fibers
Issue Date
2019-04
Publisher
Carbon
Citation
VOL 144-448
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/68940
ISSN
0008-6223
Appears in Collections:
KIST Publication > Article
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