Journal article
Regeneration of Bombyx mori silk by electrospinning. Part 3: characterization of electrospun nonwoven mat
Polymer (Guilford), v 46(5), pp 1625-1634
14 Feb 2005
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Regenerated Bombyx mori silk fibroin in formic acid was electrospun and the morphological, chemical and mechanical properties of these nanofibers were examined by field emission environmental scanning electron microscopy (FESEM), Raman spectroscopy (RS), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and tensile testing. FESEM indicated that the average fiber diameter was less than 100nm and circular in cross section. This paper maps the silk fibroin molecular conformations of each step of the sample preparation and the electrospinning process. The secondary structural compositions (random and β-sheet) of the fibroin were determined by FTIR and RS. The crystallinity index of the electrospun fiber, calculated as the intensity ratio of 1624 (β-sheet) and 1663 (random) cm−1 FTIR bands was higher than that of the pristine fiber. Raman spectra of the amide I (1665cm−1, random) to amide III (1228cm−1, β-sheet) ratio of the electrospun fiber was less than that of the pristine fiber indicative of higher β-sheet content. The fiber crystallinity, determined by XRD, showed a lower value for the electrospun fiber. The electrospun fiber shows small but significant increases in the β-sheet content in comparison with the pristine fiber. Dissolution of fibroin in formic acid enhances β-sheet crystallization and may facilitate β-sheet formation in electrospun fiber. The electrospun random silk mat had a Young's modulus, ultimate tensile strength and strain of 515MPa, 7.25MPa and 3.2%, respectively.
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Details
- Title
- Regeneration of Bombyx mori silk by electrospinning. Part 3: characterization of electrospun nonwoven mat
- Creators
- Jonathan Ayutsede - Drexel UniversityMilind Gandhi - Drexel UniversitySachiko Sukigara - Niigata UniversityMichael Micklus - Drexel UniversityHung-En Chen - Department of Textile Technology and Product Development, China Textile Institute, No. 6, Chen-Tian Road, Tu-Chen City, Taipei Hsien, 236 Taiwan, ROCFrank Ko - Drexel University
- Publication Details
- Polymer (Guilford), v 46(5), pp 1625-1634
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]
- Web of Science ID
- WOS:000226995500023
- Scopus ID
- 2-s2.0-12844264235
- Other Identifier
- 991019168990504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Polymer Science