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Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries
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Antimicrobial beeswax coated polylactide films with silver control release capacity
Antonio Martínez-Abad1, Jose Maria Lagarón1, María Jose Ocio2
1Novel Materials and Nanotechnology Group, IATA, CSIC, 46980 Paterna, Spain.
International Journal of Food Microbiology
|January 23, 2014
Summary
This study developed beeswax-coated poly(lactic acid) films for sustained silver ion release, enhancing antimicrobial food packaging. The innovative coating controls silver ion release, ensuring effective bacterial control while meeting safety standards.
Area of Science:
- Materials Science
- Food Science
- Biotechnology
Background:
- Silver-based antimicrobials are widely used but face challenges in food packaging applications.
- Controlled release of antimicrobial agents is crucial for efficacy and safety in food contact materials.
Purpose of the Study:
- To fabricate and characterize poly(lactic acid) films coated with beeswax for controlled silver ion release.
- To evaluate the antimicrobial performance and silver ion release kinetics of these functionalized films for food packaging.
Main Methods:
- Fabrication of poly(lactic acid) films coated with beeswax.
- Voltammetric monitoring of silver ion release under various conditions (pH, media, contact time).
- Antimicrobial efficacy testing against Salmonella enterica.
Main Results:
- Beeswax coating enabled sustained silver ion release, unlike uncoated films with high burst release.
- Silver ion release was pH-dependent and slower in surface contact than immersion.
- Coated films demonstrated significant bactericidal effect against Salmonella enterica at low silver ion concentrations.
Conclusions:
- Beeswax-coated PLA films offer tunable, sustained silver ion release for effective antimicrobial activity.
- These materials show promise for food packaging and other migration-sensitive applications.
- Controlled release is key to meeting safety regulations and ensuring antimicrobial efficacy.
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