Cairo University

MTPR Journal


Spectroscopy Study for the Structure Characterization of Chitosan/Montmorillonite nanocomposite With Different Loads

A. M. Shehap 1, M. A. Mahfouz 1*, Rabab A. Nasr 2, A. M. Ismail 3
1Physics Department, Faculty of Science, Cairo University, Giza 12613, Egypt.
2Water Pollution Control Department, National Research Centre, Giza 12622, Egypt.
3Physics Division, Spectroscopy Department, National Research Centre, Giza 12622,

Vol./Issue: 19 , id: 291

Chitosan biopolymer and the montmorillonitenanoclay(MMT) are prepared in form of thin films by casting technique with different weight percentage(10,20,30,40,50,60,70 %) of MMT/Chitosan. Sonication method is used to obtain well dispersion as possible of MMT into chitosan.XRD,IR,UV/visible and thermal studies have been used to investigate the structural changes and the thermal stabilities for these high doping samples in order to be applicable for certain applications. The XRD confirms the existence of the interaction between chitosan and MMT and the IR showed the disappearance of some bands and the displacement of amid groups and the changes of intensities of the IR spectra that support the existence of structure changes depending upon the percentage of the load of MMT in Chitosan .The UV visible spectra showed certain absorption bands in the UV ranges at the low percentage of MMT as well as an evidence of theplasmon effect at high loading. The optical parameters such as the absorption edge,optical band energy and the refractive index are estimated for the different samples. The thermal analysis such as DSC and derivative TGA data are used to calculate the thermodynamic parameters through the decomposition processes that provide an evidence of the thermal stability and the complexion between nanoclay and Chitosan.