Préparation et caractérisation de films à base d’amidon renforcés par la montmorillonite.

Abstract

Bioplastics are an alternative to replace conventional synthetic plastics. However, the properties in general are found much more mediocre hence the idea of reinforcing them with reinforcements that can provide the missing properties while preserving, in part, the biodegradable character. The objective of this work is therefore the development and characterization of plastic films based on corn starch, reinforced by a mineral filler, montmorillonite (MMT), and a synthetic polymer polyvinylpyrrolidone (PVP), and plasticized by glycerol. Compatibility studies indicate that the starch / PVP mixture is incompatible. The addition of formaldehyde can improve to a certain extent the phase separation behavior between starch and PVP. Composite films have been developed by the casting method and characterized by X-ray diffraction (XRD), infrared spectroscopy Fourier Transform (FTIR), differential scanning calorimetry (DSC), mechanical analysis dynamics (DMA) and the scanning electron microscope (SEM).