Academic Journal
Effect of Mechanical Deformation on the Structure of Regenerated Bombyx mori Silk Fibroin Films as Revealed Using Raman and Infrared Spectroscopy
| العنوان: | Effect of Mechanical Deformation on the Structure of Regenerated Bombyx mori Silk Fibroin Films as Revealed Using Raman and Infrared Spectroscopy |
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| المؤلفون: | Huot, Alexandrine, Lefèvre, Thierry, Rioux-Dubé, Jean-François, Paquet-Mercier, François, Nault, Anne-Philipe, Auger, Michèle, Pézolet, Michel |
| المصدر: | Applied Spectroscopy ; volume 69, issue 6, page 689-698 ; ISSN 0003-7028 1943-3530 |
| بيانات النشر: | SAGE Publications |
| سنة النشر: | 2015 |
| الوصف: | To better understand the effect of mechanical stress during the spinning of silk, the protein orientation and conformation of Bombyx mori regenerated silk fibroin (RSF) films have been studied as a function of deformation in a static mode or in real time by tensile-Raman experiments and polarization modulation infrared linear dichroism (PM-IRLD), respectively. The data show that either for step-by-step or continuous stretching, elongation induces the progressive formation of β-sheets that align along the drawing axis, in particular above a draw ratio of 2. The formation of β-sheets begins before their alignment during a continuous drawing. Unordered chains were, however, never found to be oriented, which explains the very low level of orientation of the amorphous phase of the natural fiber. Stress-perturbed unordered chains readily convert into β-sheets, the strain-induced transformation following a two-state process. The final level of orientation and β-sheet content are lower than those found in the native fiber, indicating that various parameters have to be optimized in order to implement a spinning process as efficient as the natural one. Finally, during the stress relaxation period in a step-by-step drawing, there is essentially no change of the content and orientation of the β-sheets, suggesting that only unordered structures tend to reorganize. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1366/14-07776 |
| الاتاحة: | http://dx.doi.org/10.1366/14-07776 http://journals.sagepub.com/doi/pdf/10.1366/14-07776 http://journals.sagepub.com/doi/full-xml/10.1366/14-07776 |
| Rights: | http://journals.sagepub.com/page/policies/text-and-data-mining-license |
| رقم الانضمام: | edsbas.EFCDCF48 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1366/14-07776 |
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