Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 443, Issue 1-3, Pages 26-31Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2013.06.049
Keywords
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Funding
- Major Research Program of the National Natural Science Foundation of China [91026018]
- High-Tech Research and Development Project Program of China (863) [2013AA051402]
- Doctoral Fund of Ministry of Education of China [20110111110015]
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Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) were conducted on PAN-based intermediate modulus carbon fibers to investigate the structure and surface hydrophilicity of the carbon fibers before and after gamma irradiation. Two methods were used to determine Young's modulus of the carbon fibers. The results show that gamma ray irradiation improved the degree of graphitization and introduced compressive stress into carbon fiber surface. Gamma ray also improved the carbon fiber surface hydrophilicity through increasing the value of O/C and enhancing the quantity of oxygen functional groups on carbon fibers. No distinct morphology change was observed after gamma ray irradiation. The Young's modulus of the fibers increased with increasing irradiation dose. (C) 2013 Elsevier B.V. All rights reserved.
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