Physicochemical Characteristics and Antioxidant Activity of the Chitosan/Zein Films Incorporated With Pulicaria Gnaphalodes L. Extract-Loaded Nanoliposomes Publisher



Mehdizadeh A¹ ; Shahidi SA² ; Shariatifar N³ ; Shiran M⁴ ; Ghorbanihasansaraei A² Show Affiliations
Source: Journal of Food Measurement and Characterization Published:2022

Abstract

Nowadays, the request for biodegradable and antioxidant packaging as one of the desirable preservation technologies to prevent food oxidation is increasing. This research aimed to characterize and compare the mechanical, physical and antioxidant activities of the chitosan/zein films having free or nanoencapsulated aqueous extract [the Pulicaria gnaphalodes L. extract (PGE)]. Different lecithin/cholesterol ratios (60:0, 50:10, 40:20, and 30:30) were used to prepare nanoliposomes according to the thin-film hydration–sonication technique to create mean sizes of 142–166 nm and an encapsulation efficiency (EE) of 49.88–73.05%. The nanoliposomes with the lowest size of droplet and the highest EE were elected for incorporating into the samples of films. The outcome on Fourier transform infrared spectroscopy exhibited novel interactions between the chitosan/zein and nanoliposomes. Despite the increase in yellowness and the reduction in whiteness, the incorporation of nanoliposomes enhanced the mechanical stiffness and decreased the water vapor permeability. The films containing PGE-loaded nanoliposomes at a concentration of 3% exhibited a higher antioxidant potential when compared with that exhibited by the free PGE-incorporated films. This study suggests that the chitosan/zein film containing encapsulated PGE can be a candidate for food active packaging and due to these features, this film can be used in food storage. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.