Title:The Use of Montmorillonite (MMT) in Food Nanocomposites: Methods of Incorporation, Characterization of MMT/Polymer Nanocomposites and Main Consequences in the Properties
VOLUME: 11 ISSUE: 1
Author(s):Fernanda Vilarinho, Malia Fátima Vaz and Ana Sanches Silva*
Affiliation:Department of Food and Nutrition, National Institute of Health Dr. Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, IDMEC, Institute of Mechanical Engineering, Instituto Superior Tecnico, University of Lisbon, Lisbon, National Institute of Agrarian and Veterinary Research (INIAV), Rua dos Lagidos, Lugar da Madalena, 4485- 655 Vairao, Vila do Conde
Keywords:Biopolymers, food contact materials, food packaging, legislation, montmorillonite, nanocomposites, nanoforms,
nanotechnology.
Abstract:
Background: The clay Montmorillonite (MMT) is among the nanofillers more frequently
used in food packaging. The uniform dispersion of nanoparticles in polymers confers considerable
improvement of mechanical, thermal, optical, and/or barrier properties in polymer/clay
nanocomposites.
Objective: The aim is to ascertain the state of the art of the use of MMT for packaging purposes,
with special emphasis on food applications.
Methods: A literature review was carried out through recent papers and patents that focused on the
incorporation of MMT in polymers.
Results: This review emphasizes the interaction of MMT with polymers and their levels of incorporation
in the nanocomposites. This work also highlights the analytical methodologies used for the
characterization of the polymer/clay nanocomposites and the main consequences of the fillers in the
properties of nanocomposites. Challenges remain about increasing the compatibility between clays
and biopolymers to promote their utilization in food packaging. New strategies for immobilization
of oxides, enzymes, essential oils, and other bioactive compounds are needed.
Conclusion: MMT-based composite materials are promising to be used in intelligent and active
packaging.