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Radiation assisted pre-oxidation of polyacrylonitrile fiber: Graphite formation and lower crystal size revealed by 2D WAXD at a synchrotron facility
Zhang, WL; Wang, MH; Cheng, L; Wu, GZ
2020
Source PublicationPOLYMER DEGRADATION AND STABILITY
ISSN0141-3910
Volume179Pages:-
Subtype期刊论文
AbstractTo accurately understand how irradiation treatment influences the crystal structure variation of polyacrylonitrile (PAN) fibers during the pre-oxidation process, the crystal structure evolution of the irradiated PAN fibers after pre-oxidation was investigated by synchrotron wide-angle X-ray diffraction (WAXD) at beamline BL16B1 in transmission geometry, using a three-slit system at the Shanghai Synchrotron Radiation Facility. By employing highly sensitive 2D WAXD analysis, we observed the deformation of the orientation structure in the irradiated PAN fibers. It was found that irradiation treatment can reduce the quasicrystal structure formed in the early stage of the pre-oxidation process (200-220 degrees C). Irradiation further enhanced the decrease in crystal size, crystallinity, and preferred orientation during the pre-oxidation. The diffraction peaks for PAN fibers at q = 12 nm(-1) and 20.7 nm(-1) almost disappeared at 260 degrees C; meanwhile, a new peak appeared for the irradiated samples at q = 18.2 nm(-1), indicating the formation of a graphite structure, which confirmed by Raman spectra. The results showed that irradiation treatment can accelerate the pre-oxidation reaction of PAN fiber, reduce the time required for pre-oxidation, and improve the properties of carbon fiber by reducing the crystal size and crystallinity. (C) 2020 Elsevier Ltd. All rights reserved.
KeywordELECTRON-BEAM IRRADIATION CARBON-FIBERS PAN FIBERS MICROSTRUCTURE PRECURSORS SAXS
DOI10.1016/j.polymdegradstab.2020.109264
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/33097
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Chinese Acad Sci, Shanghai Inst Appl Phys, Jialuo Rd 2019, Shanghai 201800, Peoples R China
2.Univ China Acad Sci, Beijing 100049, Peoples R China
3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China
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GB/T 7714
Zhang, WL,Wang, MH,Cheng, L,et al. Radiation assisted pre-oxidation of polyacrylonitrile fiber: Graphite formation and lower crystal size revealed by 2D WAXD at a synchrotron facility[J]. POLYMER DEGRADATION AND STABILITY,2020,179:-.
APA Zhang, WL,Wang, MH,Cheng, L,&Wu, GZ.(2020).Radiation assisted pre-oxidation of polyacrylonitrile fiber: Graphite formation and lower crystal size revealed by 2D WAXD at a synchrotron facility.POLYMER DEGRADATION AND STABILITY,179,-.
MLA Zhang, WL,et al."Radiation assisted pre-oxidation of polyacrylonitrile fiber: Graphite formation and lower crystal size revealed by 2D WAXD at a synchrotron facility".POLYMER DEGRADATION AND STABILITY 179(2020):-.
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