Processing and antimicrobial efficacy of polypropylene/montmorillonite/silver nanocomposites as food packaging films

Abstract

Multifunctional chitosan nanocomposites: The effect of silver supported on montmorillonite platelets on barrier and mechanical properties AIP Conference Proceedings 1599, 442 (2014) Abstract -The aim this study was to use nanocomposites of polypropylene (PP), montmorillonite (MMT) and silver nanoparticles (AgNPs), prepared by melt intercalation in a twin-screw extruder, as a food packaging bactericide material. The use of nanoclay and nanosilver as additives for polymer matrices requires, in some cases (with non-polar matrices) the use of a compatibilizer agent which will act as a bridge or permanent buffer for nanoclay-nanosilver-matrix interaction. As compatibilizer agent it has been used a propylene graft maleic anhydride copolymer (PP-g-MA). The nanocomposites were evaluated by differential scanning calorimetry (DSC), X-Rays diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and determination of antibacterial activity. The results indicate the formation of microstructures predominantly exfoliated. Further, the antibacterial properties of the films were investigated against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) bacteria.

The effect of silver nanocomposite packaging based on melt mixing and sol–gel methods on shelf life extension of fresh chicken stored at 4 °C

“…The method used to produce the nanocomposites from the masterbatch was based on the previous research by Oliani et al (); at first, temperature was adjusted for the different heating regions, the speed of the machine coil was set at 60 rpm, and the pressure of the blowing system was set at 1.5 × 10 5 pa. The added mixtures used in the production of the nanocomposites were calculated according to Table and weighed with 0.01 g precision using a digital scale.…”

Effect of Surface Properties of Nanoparticles on the Crystallization Behavior of Polypropylene/Polypropylene‐g‐Silica Nanocomposites

“…In recent years, polypropylene (PP) based nanocomposites filled by various kinds of nanoparticles (NPs) have received much attention owing to its excellent mechanical, [ 1 ] flame retardant, [ 2,3 ] magnetic, [ 4 ] and foam properties, [ 5 ] which have been applied in numerous fields, such as the treatment of diverse waste water, [ 6 ] the films of food packaging, [ 7 ] and the application of bipolar plate. [ 8 ] During the modification process of PP based nanocomposites, the crystallization behavior plays a vital role in the mechanical properties and processability of final products.…”