Abstract
Chitosan (CS)/silk fibroin (SF) blend films containing nanoparticles of methoxy poly(ethylene glycol)- b-poly( d, l-lactide) (MPEG- b-PDLL) were prepared by film casting of nanoparticle suspension–CS/SF blend solution. The nanocomposite blend films with CS/SF blend ratios of 2/0, 2/1, 2/2, 1/2 and 0/2 (w/w) were investigated. FTIR results showed the intermolecular bonds existed between nanoparticles and CS/SF film matrices. The nanoparticles with spherical shape observed from SEM micrographs were approximately less than 1 μm in size and dispersed throughout the film matrices. Nanopores on both film surfaces and cross-sections of the nanocomposite blend films were formed due to self-condensation and phase separation of the nanoparticles. The nanocomposite blend films contained nanoparticles exhibited an increase of film strength and decrease of film flexibility and water wettability.
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