Modelling and Simulation of Gaseous Diffusion Through Biodegradable Polymer Nano Composites
To overcome the technological challenges in food packaging industry, it is important to understand the
structure-property relationship in a polymer nanocomposite. The conventional plastics (PET) are being replaced by the
biodegradable plastics such as Polylactic Acid (PLA) - Montmorillonite (MMT) nanocomposites. The PLA-MMT
nanocomposite doped with silver nanoparticles has been simulated and analysed for the oxygen diffusion barrier. The
simulation tested the polymer nanocomposite for its oxygen diffusion barrier action using COMSOL Multiphysics and
applying suitable boundary conditions. The silver nanoparticles are doped with an intention of capturing the microbes which
include pathogenic bacteria. This helps us in keeping the food fresh and free from microorganisms. It was observed from the
simulation results that thickness of the polymer is not the only factor affects the diffusivity of the oxygen. It was also found
that the structural parameters that include volume fraction (φ), aspect ratio (α), intercalation width (W), and orientation angle
(θ) of nanoparticles play an important role in the oxygen diffusion barrier property of the nanocomposite.
Keywords— Nanocomposites, Biodegradable, Food Packaging, Oxygen Diffusion.