Document Type : Research Paper
Faculty of Technical Engineering, Department of Chemical Engineering, IAU, Ahar, Iran
Chemistry Department, South Tehran Branch, Islamic Azad University, Tehran, Iran
Novel nanocomposite films based on amylose (AM) and Fe3+-montmorillonite (Fe3+–MMT) in the matrix of poly (vinyl pyrrolidone) (PVP) were fabricated by using a solution casting method. The X-Ray diffractional analysis indicated that an ion-exchange process occurred between Fe3+–MMT and PVP. Thermogravimetrical analysis (TGA), differential termogravivetrical analysis (DTG), Scanning Electron microscopy (SEM) and differential scanning calorimetry (DSC) results hinted to PVP/AM films forming a stabler network through the dispersion of Fe3+ cations. An increase in the loading of Fe3+–MMT improved the hydrophilic properties of PVP/AM films, which lead to the high degree of resistance against on the water absorption. Mechanical properties of PVP/AM films influenced by the uniform dispersion of Fe3+–MMT in polymer network established with strong covalent interactions between PVP/AM and Fe3+–MMT. This interaction not only improved the mechanical properties of the films, but also enhanced the thermal stability of them through the facilitating of the MMT dispersion within the polymer matrix.