The development of nanocomposites is a new strategy to improve physical properties of polymers, including
mechanical strength, thermal stability, and gas barrier properties. The most promising nanoscale size fillers
are montmorillonite and kaolinite clays. Graphite nanoplates are currently under study. In food packaging, a major
emphasis is on the development of high barrier properties against the migration of oxygen, carbon dioxide, flavor
compounds, and water vapor. Decreasing water vapor permeability is a critical issue in the development of biopolymers
as sustainable packaging materials. The nanoscale plate morphology of clays and other fillers promotes the
development of gas barrier properties. Several examples are cited. Challenges remain in increasing the compatibility
between clays and polymers and reaching complete dispersion of nanoplates. Nanocomposites may advance the
utilization of biopolymers in food packaging.
Keywords: biodegradable, food, nanocomposite, packaging