Physical properties and structure of silk. VI. Conformational changes in silk fibroin induced by immersion in water at 2 to 130°c
Article first published online: 11 MAR 2003
Copyright © 1979 John Wiley & Sons, Inc.
Journal of Polymer Science: Polymer Physics Edition
Volume 17, Issue 3, pages 515–520, March 1979
How to Cite
Magoshi, J., Mizuide, M., Magoshi, Y., Takahashi, K., Kubo, M. and Nakamura, S. (1979), Physical properties and structure of silk. VI. Conformational changes in silk fibroin induced by immersion in water at 2 to 130°c. J. Polym. Sci. Polym. Phys. Ed., 17: 515–520. doi: 10.1002/pol.1979.180170315
- Issue published online: 11 MAR 2003
- Article first published online: 11 MAR 2003
- Manuscript Revised: 29 SEP 1978
- Manuscript Received: 16 MAY 1978
Silk fibroin films in the random-coil and β-form conformations were immersed in water at temperatures from 2 to 130°C, and conformational changes were followed by x-ray diffraction, infrared spectroscopy and differential scanning calorimetry. On treatment with water below 60°C, the random-coil conformation is converted to the α form and above 70°C to mixtures of the α and β conformations. The β-form content increases as the immersion temperature is raised. The β form is not affected by immersion in water in the temperature range studied.