Structural changes occurring in fibroin during chemical processing of silk manufacturing wastes were studied using viscometry, electrophoresis in polyacrylamide gel with sodium dodecyl sulfate, IR spectroscopy, dynamic light scattering, and x-ray diffraction. Hydrolytic destruction increased and the fibroin molecular mass decreased if the pH of degumming solutions, temperature, and degumming time were increased. The optimal conditions for degumming silk fibers that minimized destruction of the polypeptide chains were proposed.
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We thank staff members of Lodz Technical University Dr. Waldemar Maniukiewicz to assistance with the x-ray structure analysis and Mr. Zbigniev Zientarski for supporting the experimental work. The studies were performed in the framework of a state task from the Ministry of Science and Higher Education of the Russian Federation No. 4.5718.2017/8.9.
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Translated from Khimicheskie Volokna, No. 6, pp. 6-10, November—December, 2019.
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Susanin, A.I., Sashina, E.S., Zakharov, V.V. et al. Structural Changes of Fibroin During Chemical Processing of Silk Wastes. Fibre Chem 51, 412–417 (2020). https://doi.org/10.1007/s10692-020-10123-8
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DOI: https://doi.org/10.1007/s10692-020-10123-8