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Preparation and characterization of novel hybrid of chitosan‐ g ‐PDMS and sodium montmorrilonite
Author(s) -
Depan Dilip,
Kumar Bijandra,
Singh Raj Pal
Publication year - 2008
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30860
Subject(s) - chitosan , characterization (materials science) , materials science , chemistry , chemical engineering , nanotechnology , engineering , organic chemistry
Preparation and properties of Chitosan (CS)‐clay nanocomposites grafted with polydimethyl siloxane (PDMS) with different clay ratios are herein discussed. CS is intercalated into sodium montmorrilonite and PDMS is grafted onto CS under UV irradiation. Sample films of CS intercalated into clay and grafted with PDMS were prepared by solvent casting method with varying amount of nanoclay and PDMS. They were characterized by conventional techniques such as X‐ray diffractometry, fourier transform infrared spectroscopy, 13 C NMR, thermo gravimetric analysis, and differential thermal analysis. Sorption behavior of samples has been followed by measuring swelling degree and issues on the interactions of biopolymers with clay are also discussed. The water absorption of composites films reduces with an increase in the amount of incorporated clay. This is due to the barrier formation in the form of cross‐linking points, which prevents water permeation into CS. The amount of adsorbed water is more, when the amount of CS exceeds the amount of PDMS. This shows high water retention capacity of CS. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 2008