Abstract
In order to investigate the graphitization behavior of Bombyx mori silk fibroin (SF) fibers, structural inspection of carbonized SF fibers treated with iodine vapor was studied at different temperatures, from 800 to 1400 °C. Wide angle X-ray diffraction measurement suggested that both untreated and iodinated SF fibers exhibited amorphous structure carbonized to 1200 °C. After carbonization at 1400 °C for 12 h, a graphite-like structure was obtained. Raman spectroscopy and transmission electron microscopic observation showed that the graphite layers of SF fibers became more ordered after iodine treatment. The carbon yield obtained at higher temperature (1400 °C) after iodine treatment was higher, ca. 28 wt%, than that of untreated SF.
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Acknowledgements
This work was supported by The Global COE Program and Grant-in-Aid for Scientific Research program by the Ministry of Education, Science, Sports and Culture of Japan. The authors gratefully thank Professor Fujio Okino, Dr. Yoshiyuki Hattori, and Mr. Hisatoshi Koshikawa, Faculty of Textile Science and Technology, Shinshu University, Japan, for their help in TEM measurements.
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Majibur Rahman Khan, M., Gotoh, Y., Morikawa, H. et al. Graphitization behavior of iodine-treated Bombyx mori silk fibroin fiber. J Mater Sci 44, 4235–4240 (2009). https://doi.org/10.1007/s10853-009-3557-x
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DOI: https://doi.org/10.1007/s10853-009-3557-x