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Study on the properties of nano‐TiO 2 particles modified silk fibroin porous films
Author(s) -
Xinxing Feng,
Lan Zhou,
Hailin Zhu,
Jianyong Chen
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.31527
Subject(s) - fibroin , crystallinity , materials science , silk , thermogravimetric analysis , scanning electron microscope , porosity , chemical engineering , solubility , composite material , nano , polymer chemistry , chemistry , organic chemistry , engineering
Using the freeze‐drying method, Nano‐TiO 2 /silk fibroin porous films were synthesized with different ratios of TiO 2 to silk fibroin solution. Through scanning electron microscopy (SEM), X‐ray diffraction (XRD), thermogravimetric analysis (TGA), tensile strain, and water‐solubility tests, the structures and properties of these porous films were characterized. The SEM results indicated that the pores of the nano‐TiO 2 /silk fibroin porous films were uniformly distributed by the freeze‐drying method. The XRD analysis indicated that the formation of nano‐TiO 2 particles might induce a conformational transition of silk fibroin from the typical Silk I to the typical Silk II structure partly with an increase in the crystallinity of the porous films. Compared with the pure silk fibroin porous films, the mechanical properties of nano‐TiO 2 /silk fibroin porous films were improved, and its heat transition temperature was also enhanced; however, the water‐solubility of this material was diminished. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010