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Conformation transition of silk fibroin induced by blending chitosan

✍ Scribed by Xin Chen; Wenjun Li; Tongyin Yu

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 131 KB
Volume: 35
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(199710)35:14<2293::aid-polb9>3.0.co;2-x

No coin nor oath required. For personal study only.

✦ Synopsis

The conformation of silk fibroin in silk fibroin/chitosan (SF/CS) blend membrane was analyzed by infrared spectrum, X-ray diffractometry, and Raman spectrum. The results demonstrated that the SF could show b-sheet conformation when the SF content in blend membranes was 10% (w/w) and 60-80% (w/w), while the pure SF membrane showed random coil conformation. A mechanism of the conformation transition was suggested in that the SF chain could use the rigid CS chain as a mold plate to stretch itself to form a b-sheet structure according to the strong hydrogen bond between CS and SF. Therefore, a new concept, named ''Polymer-Induced Conformation Transition,'' was proposed.

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