A toughening indole-based epoxy film with efficient anti-counterfeiting properties driven by cation- interaction

A strong and tough indole-based epoxy film driven by cation-pi interaction is designed, evading the trade-off between stiffness and extensibility in epoxy resins. The film with high strength, toughness and effective anti-counterfeiting properties induced by cation-pi interaction is promising in the development of the fields of aerospace and electronic devices.(c) 2023 Society of Industrial Chemistry.