A novel strategy for foodstuff can coatings: Hybrid resinous materials beside silica nanoparticles

Abstract

For many years, Bisphenol A (BPA) based epoxy resins have been used as coating material for foodstuff cans because of their appropriate properties. Recently, with attention to the harmful health effects of BPA derivatives, limitation of the usage of epoxy resins has escalated. In this research, using Taguchi experimental design method, different nanocomposite coatings based on hybrid resinous materials containing different amounts of epoxy and polyester and silica nanoparticles were formulated. The migration properties of formulated coatings were investigated based on the standard methods. The results showed that the 45 wt.% replacement of epoxy by polyester resin in combination with 2 wt. % of nano silica, had not any inverse effect on needed mechanical, physical and chemical properties of optimized formulation and, at the same time, migration of BPA and toxic materials were in the acceptable ranges, based on the EN1186-EU 10:2011 standard.

Graphical Abstract

Keywords:

• Taguchi method
• silica
• migration test
• BPA
• polyester

Acknowledgement

The authors are grateful to the Polymer Engineering, South Tehran Branch, Islamic Azad University, and Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran, for permission to utilize the laboratory equipment and facilities to conduct this research experiments.