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Preparation of regenerated Antheraea yamamai silk fibroin film and controlled‐molecular conformation changes by aqueous ethanol treatment
Author(s) -
Zheng Zhonghou,
Wei Yanqiong,
Yan Shuqin,
Li Mingzhong
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.31522
Subject(s) - fibroin , aqueous solution , silk , polymer chemistry , dissolution , nuclear chemistry , materials science , fourier transform infrared spectroscopy , ethanol , raman spectroscopy , random coil , chemical engineering , bombyx mori , chemistry , crystallography , composite material , organic chemistry , biochemistry , circular dichroism , physics , optics , engineering , gene
Abstract The methods of dissolving Antheraea yamamai ( A. yamamai ) silk fibroin fibers and preparing the regenerated silk fibroin were studied. The molecular conformations of A. yamamai silk fibroin film treated by different concentration ethanol solution were investigated by XRD, FTIR, and Raman spectra. The results indicated that A. yamamai silk fibroin fibers could be completely dissolved in dense lithium thiocyanate solution at about 35°C for 1 h. The initial regenerated film consisted of α‐helix and random coil components. The aqueous ethanol treatment of the film resulted in significant increase in β‐sheet component and improvement of water resistance of the film. This effect was strongly dependent on ethanol concentration, and 60–80% (w/w) ethanol was most effective. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010