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

Authors
Jo, A. YoungYoo, Seung HwaChung, Yong-SikLee, Sungho
Issue Date
2019-04
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CARBON, v.144, pp.440 - 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 degrees 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 degrees 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. (C) 2018 Elsevier Ltd. All rights reserved.
Keywords
MICROWAVE PLASMA CARBONIZATION; THERMAL STABILIZATION; CROSS-LINKING; PRECURSORS; BEAM; PAN; POLYETHYLENE; FABRICATION; BEHAVIOR; HEAT; MICROWAVE PLASMA CARBONIZATION; THERMAL STABILIZATION; CROSS-LINKING; PRECURSORS; BEAM; PAN; POLYETHYLENE; FABRICATION; BEHAVIOR; HEAT; Textile-grade polyacrylonitrile; Ultraviolet irradiation; Stabilization; Carbon fibers
ISSN
0008-6223
URI
https://pubs.kist.re.kr/handle/201004/120144
DOI
10.1016/j.carbon.2018.12.012
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KIST Article > 2019
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