A new pyrogallol coated oxygen scavenging film and their effect on oxidative stability of soybean oil under different storage conditions

Abstract

The current study investigates the oxidative stability of soybean oil packaged with an oxygen scavenging film prepared by pyrogallol coating with concentrations of 5, 10, and 20% at 5, 23, and 60 °C and 95 ± 2% RH respectively. The oil stability was evaluated in terms of peroxide, thiobarbituric acid, and p-anisidine then compared with oil packed without the oxygen scavenging film. The results showed that the LDPE/PG 10 and 20% were efficient in the stabilization of soybean oil, even at high temperature. Peroxide, Thiobarbituric acid, and p-anisidine values, the oil samples packed with LDPE/PG films delayed the oil oxidation. The synergetic effect of LDPE/PG films, which can scavenge oxygen from the packaged product thereby slowing the oxidation of fats, was established in the study. The present study confirmed that active packaging could be introduced as a worthy replacement for direct addition of artificial antioxidants to the soybean oil.

Ethylene scavengers for active packaging of fresh food produce

“…Ethylene produces physiological responses, for example geotropism, ripening, senescence, dormancy and flowering (Singh et al 2018a, b, c, d). The low concentration edge required for triggering physiological activities validates that reducing ethylene in a closed atmosphere can help the postharvest durability of fresh produce (Bailén et al 2006;Gaikwad et al 2017b), apart from these postharvest losses and quality deterioration of fruits and vegetables mostly caused by the ripening process induced by ethylene and contamination due to micro-organisms (Singh et al 2016b). Active packaging prevents the adverse effects of ethylene gas and prevents microbial growth.…”

“…The approaches for the ethylene regulation can be categorized into three main types: firstly, reduction in ethylene (via modified atmospheric packaging through swapping the different gases in the headspace); secondly, use of perforated packaging material (by using microperforated packaging materials to permeate the gases to inside and outside of package); and thirdly, ethylene removal (by using ethylene scavenger). Ethylene scavengers (water absorption is by means of a chemical reaction between two materials) or ethylene absorbers (materials who physically absorb and hold ethylene molecule) are starting to be used by supermarket chains, for example Tesco and M&S for fresh fruit and vegetable packaging applications to decrease spoilage and increase shelf life (Boonruang et al 2012;Gaikwad et al 2017b;Singh et al 2018b).…”

“Functional upcycling” of polymer waste towards the design of new materials

“…213 Currently, various desired functionalities are introduced in commercial PE, such as antimicrobial properties (chitosan, chitosan + pullulan, quaternary ammonium salts, and metal-fumed silica) (Table 2(5)), 161,190,198 antioxidant activity (chitosan), 171 ethylene scavenging behavior 214 (halloysite nanotubes), oxygen scavenging behavior (pyrogallol, zero valent iron particles, and gallic-acid). [215][216][217] We believe that these methods will be successfully implemented for functional upcycling of waste PE.…”

Active Flexible Films for Food Packaging: A Review

“…Gaikwad, Singh, & Lee [64] studied the oxygen scavenging capacity of PE-LD films loaded with pyrogallol (PG) (a natural phenolic compound). The coating was prepared with different concentrations of PG (5, 10, and 20%, w/v) added to an ethyl acetate solution and different amounts of polyurethane.…”