Production and characterization of starch composite films with silver loaded zeolite

Clinoptilolite zeolite was modified by ionic exchange with silver and employed in the production of cassava starch composite films by casting method. The obtained films were evaluated in terms of mechanical, antimicrobial and microstructure properties as well as water vapor permeability and color. The starch films containing silver loaded zeolite showed antimicrobial activity against Escherichia coli and Staphylococcus aureus. The composite films with unloaded zeolite did not show antimicrobial activity. The composite films with unloaded zeolite and silver loaded zeolite presented an increase in the tensile strength, confirming the action of zeolite as reinforcement agent for the polymeric matrix. A decreased in water vapor permeability was observed for both treatments. The use of silver loaded zeolite should be a viable alternative as biodegradable active packaging due to its reinforcement and antimicrobial characteristics