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Structure and properties of regenerated Antheraea pernyi silk fibroin filaments
Author(s) -
Zuo Baoqi,
Liu Leigen,
Zhang Feng
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30347
Subject(s) - fibroin , magic angle spinning , materials science , silk , scanning electron microscope , bombyx mori , differential scanning calorimetry , antheraea pernyi , random coil , fourier transform infrared spectroscopy , polymer chemistry , spinning , raman spectroscopy , composite material , chemical engineering , chemistry , crystallography , nuclear magnetic resonance spectroscopy , optics , circular dichroism , organic chemistry , biochemistry , physics , gene , engineering , thermodynamics
Abstract Degummed Antheraea pernyi silk fibroin (APSF) fibers were dissolved in a lithium thiocyanate solution that was dialyzed against distilled water for 3 days. Solution‐cast APSF films were dissolved in hexafluoroisopropanol to prepare a spinning solution. Wet spinning was employed to prepare APSF filaments. Scanning electron microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, solid‐state 13 C cross‐polarization/magic angle spinning nuclear magnetic resonance, and differential scanning calorimetry were employed to study the regenerated APSF filaments. The results showed a uniform distribution of molecular weights, and the largest one may have been greater than 200 kDa. The regenerated filaments contained β‐sheet, α‐helix, and random‐coil conformations, and their breaking strength was 52.20% of the breaking strength of the native fibers. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009