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Journal of Applied Sciences
  Year: 2009 | Volume: 9 | Issue: 6 | Page No.: 1147-1152
DOI: 10.3923/jas.2009.1147.1152
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Morphology and Thermal Stability of Chitosan and Methoxy Poly (ethylene glycol)-b-Poly (ε-caprolactone)/Poly(D, L-lactide) Nanocomposite Films

Supawut Khamhan and Yodthong Baimark

The objective of this study was to prepare biodegradable chitosan nanocomposite films contained dispersed nanoparticles of methoxy poly(ethylene glycol)-b-poly(ε-caprolactone) (MPEG-b-PCL) or methoxy poly(ethylene glycol)-b-poly(D,L-lactide) (MPEG-b-PDLL) diblock copolymers by solvent evaporation of nanoparticle suspension-chitosan solution. The nanoparticles were firstly produced in the chitosan solution by modified-spontaneous emulsification solvent diffusion method without any surfactants before film casting. The dispersed nanoparticles with approximately 100 and 300 nm in sizes for MPEG-b-PDLL and MPEG-b-PCL, respectively can be observed throughout the chitosan film matrices. Nanoparticle morphology was spherical shapes with smooth surfaces. The nanoparticles of MPEG-b-PDLL were smaller than the MPEG-b-PCL. The possible interactions between the chitosan film matrices and the nanoparticles were evaluated by thermogravimetry. Thermal stability of the chitosan film matrices were enhanced by nanoparticle incorporating. The chitosan/MPEG-b-PCL nanocomposite films had lower film transparency and moisture uptakes than the chitosan/MPEG-b-PDLL nanocomposite films. The both film transparency and moisture uptakes decreased as the diblock copolymer ratio increased.
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  •    Preparation of Surfactant-free Linear and Star-shaped Poly(L-lactide)-b-methoxy Polyethylene Glycol Nanoparticles for Drug Delivery
How to cite this article:

Supawut Khamhan and Yodthong Baimark, 2009. Morphology and Thermal Stability of Chitosan and Methoxy Poly (ethylene glycol)-b-Poly (ε-caprolactone)/Poly(D, L-lactide) Nanocomposite Films. Journal of Applied Sciences, 9: 1147-1152.

DOI: 10.3923/jas.2009.1147.1152






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