Synthesis and characterization of zeolite – Titanium dioxide composite material for ethylene adsorbing and scavenging dual action in coated paper packaging for postharvest product

Abstract

Ripening of agricultural products can be influenced by a range of physical, biological, and chemical factors, with ethylene production being a prominent chemical factor. In climacteric fruits, elevated ethylene level accelerates ripening, leading to increased water loss, reduced nutritional value, microbial growth, and eventual spoilage. This study investigates the efficacy of ethylene elimination through the application of coated paper composed of active materials—zeolite, titanium dioxide (TiO₂), and zeolite-TiO₂ composite—at various concentrations (5, 10, and 15 %w/v) in conjunction with a water-based binder. The findings revealed that coated paper incorporating the zeolite-TiO₂ composite demonstrates superior performance in both adsorbing and degrading ethylene, achieving an 85.46 % reduction in ethylene levels compared to zeolite (65.96 %), TiO₂ (59.59 %), and uncoated paper (27.89 %). Experimental trials with cherry tomatoes indicated that the 15 %w/v zeolite-TiO₂ composite coating was the most effective in delaying color changes, maintaining firmness, and minimizing weight loss. Furthermore, the coated paper exhibited excellent rub resistance, with no discernible differences observed after 1000 rubbing cycles. This study shows significant potential for application of the developed coating in active packaging for agricultural products, contributing to the preservation of quality and extension of shelf life.