The microstructural change of degummed Bombyx mod silk was examined by in situ wide-angle X-ray-scattering (WAXS) with applied stretching force. WAXS patterns confirmed that the crystalline and amorphous regions coexist in the silk fibers. The crystallites with beta-sheet structure have an orthorhombic unit cell with lattice parameters: a = 9.10 angstrom, b = 9.71 angstrom and c = 6.80 angstrom. The crystallite size, crystallite orientation and crystallinity were also estimated based on the WAXS patterns. The results demonstrate that the crystallite size is almost unchanged with the stretching strain. The crystallinity is approximately linearly increasing with the applied stretching force. However, the change of the unit-cell orientation degree with c-axis along the fiber axis behaves as a fast stage and an approximately unchanged stage during the in situ stretching process. All these experimental phenomena confirm that the microstructure of the degummed silk fibers can be well explained by the model of oriented beta-sheet structure with a banded feature. (C) 2013 Elsevier B.V. All rights reserved.
Liang, K,宫宇；Gong, Y,Fu, JL,et al. Microstructural change of degummed Bombyx mori silk: An in situ stretching wide-angle X-ray-scattering study[J]. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,2013,57:99-104.
Liang, K.,宫宇；Gong, Y.,Fu, JL.,Yan, S.,Tan, YY.,...&杜蓉；邢雪青；默广；陈中军；蔡泉；吴忠华.(2013).Microstructural change of degummed Bombyx mori silk: An in situ stretching wide-angle X-ray-scattering study.INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,57,99-104.
Liang, K,et al."Microstructural change of degummed Bombyx mori silk: An in situ stretching wide-angle X-ray-scattering study".INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 57(2013):99-104.