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Preparation and characterization of novel hybrid of chitosan-g-lactic acid and montmorillonite

✍ Scribed by Dilip Depan; Annamalai Pratheep Kumar; Raj Pal Singh

Book ID
102872127
Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
604 KB
Volume
78A
Category
Article
ISSN
1549-3296

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✦ Synopsis

Abstract

The utilization of biopolymers and the development of organic–inorganic hybrids are ever increasing interest of material science researchers around the globe for various applications. The present attempt is intended to prepare nanocomposites of lactic acid grafted chitosan and layered silicates. Nanocomposites were prepared by dissolving chitosan and dispersing sodium montmorillonite in aqueous solution of L‐lactic acid with subsequent heating and film casting. They were characterized by conventional techniques such as Fourier transform infrared spectroscopy, X‐ray diffractometry, thermogravimetric analysis, energy dispersive X‐ray spectroscopy, and elemental analysis. The results from polar optical and transmission electron microscopic measurements are also discussed. Sorption behavior of samples has been followed by measuring swelling degree and contact angle. The films have shown enhanced hydrophilicity when compared with polylactic acid (PLA). Issues on the interactions of polycationic chitosan with clay are also discussed. It is observed that nanocomposites are exhibiting better thermal and physical properties than neat chitosan‐g‐LA and PLA. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res, 2006

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