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Journal of Applied Sciences
Year: 2009  |  Volume: 9  |  Issue: 16  |  Page No.: 2992 - 2995

Preparation and Characterization of Eri (Philosamia ricini) Silk Fibroin Powder

S. Yaowalak, S. Wilaiwan and S. Prasong    

Abstract: Eri (Philosamia ricini) cocoons were dissolved with 9 M Ca(NO3)2 and then dialyzed against distilled water for 3 days. The Silk Fibroin (SF) solution was used as substrate to prepare SF powder by using freeze-drying method. The secondary structure and thermal behavior of SF powder were determined by FT-IR and TGA analyzer, respectively. The SF powder was arranged in micrometer sizes. FT-IR spectra indicated that the SF powder composed of α-helix and β-sheet structures and differed from silk cocoon. Thermal properties were studied by thermogravimetric technique. Difference in thermal properties between Eri silk cocoon and SF powder was found. It is a promising that conformational structure and thermal properties were influenced by changing of silk forms.

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