Abstract
In the present study, the results of Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM) studies of chitosan (Ch) with montmorillonite (MMT) or nanoclay are presented. MMT samples have been used without modification and after nanoclay surface modification. Composites of chitosan with montmorillonite samples were obtained by drop casting suspensions of montmorillonite (3% relative to chitosan) and polymer (2wt%) in 1% acetic acid. The FTIR spectra of film composites in the amide I, amide II bands and the hydroxyl stretching bands of chitosan have been analyzed. The homogeneity and morphology of chitosan composites were ascertained from tapping-mode atomic force microscopy. The obtained results suggested that there were interactions between chitosan and montmorillonite. The microstructure obtained by AFM microscopy for chitosan and its composites showed that particles are relatively well dispersed in the chitosan matrix.
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