REVIEW PAPER |
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Enhancing Polyacrylonitrile Precursor Fibers and Polyacrylonitrile-based Carbon Fibers via Gamma-irradiation: a Review |
FENG Tingting, LIU Liangsen, MA Tianshuai, XU Zhiwei, LI Jing, FU Hongjun, KUANG Liyun, LI Yinglin
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Key Laboratory of Advanced Braided Composites, School of Textiles, Tianjin Polytechnic University, Tianjin 300387 |
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Abstract The polyacrylonitrile (PAN)-based carbon fibers have found wide application in a diverse variety of industries because of their superb performance and the facile preparation technique, while nevertheless been suffering many problems such as the extreme surface chemical inertness and the imperfect mechanical performance. This urges intensive research endeavors which have bred various modification methods to enhance the PAN-based carbon fibers. Among these methods, the γ-irradiation treatment is effective to achieve the synergetic improvement in both of the surface activities and the mechanical performance, and meanwhile can be applied to the preparation of PAN precursor fibers and the subsequent treatment process. The present paper aims to provide an overview of the γ-irradiation treatment for PAN precursor fibers and PAN-based carbon fibers, from several facets including the induced changes in the fibers’ crystalline structure, surface and interfacial properties, and mechanical properties. We make emphasis on the evolutionary course of the γ-ray-induced cross-linking of PAN precursor fiber molecules, the impact of precursor γ-irradiation to mechanical properties of the final carbon fibers, and the relationship between product’s different microzone structure evolution and mechanical properties under γ-irradiation. The review ends with a delineation of the development direction and the future prospect for this emerging technique.
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Published: 10 April 2018
Online: 2018-05-11
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