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Preparation and characterization of novel hybrid of chitosan‐ g ‐lactic acid and montmorillonite
Author(s) -
Depan Dilip,
Kumar Annamalai Pratheep,
Singh Raj Pal
Publication year - 2006
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.30738
Subject(s) - materials science , chitosan , polylactic acid , nanocomposite , montmorillonite , thermogravimetric analysis , chemical engineering , contact angle , fourier transform infrared spectroscopy , lactic acid , casting , nuclear chemistry , polymer chemistry , polymer , composite material , chemistry , biology , bacteria , genetics , engineering
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