“…This approach is widely adopted in the coating technology because of its versatility, low cost, and low environmental impact, especially compared to hard-chemistry synthesis routes (Rovera, Ghaani, & Farris, 2020). For example, hybrid coatings were obtained by sol-gel chemistry to improve the oxygen barrier properties of plastic films (Farris et al, 2012;Fuentes-Alventosa et al, 2013;Startek, Marczak, & Lukowiak, 2020). Sol-gel hybrid coatings were also prepared to obtain antimicrobial (Corradini et al, 2013;Lantano et al, 2014;Razavi, Tajik, Moradi, Molaei, & Ezati, 2020), antioxidant (Bossi, Tana, Punta, Cigada, & De Nardo, 2016) and intelligent (Liu et al, 2020) food packaging materials.…”