Effect of Different Essential Oils on the Properties of Edible Coatings Based on Yam (Dioscorea rotundata L.) Starch and Its Application in Strawberry (Fragaria vesca L.) Preservation

Abstract

Every year the world loses about 50% of fruits and vegetables post-harvest and in the supply chain. The use of biodegradable coatings and films with antioxidant properties has been considered an excellent alternative to extend the shelf life of food. Therefore, the objective of this work was to develop a coating based on yam (Dioscorea rotundata L.) starch-containing lime, fennel, and lavender essential oils to extend the shelf life of strawberries (Fragaria vesca l.). The tensile properties, barrier properties (water vapour permeability (WVP) and oxygen permeability (OP)), moisture content, water-solubility, absorption capacity, water contact angle, optical properties, the antioxidant activity of the resultant starch-based coatings were evaluated. After that, the active properties of the coatings were assessed on strawberries inoculated with Aspergillus niger during 14 days of storage at 25 °C. The results showed that the incorporation of essential oils improved the elongation and WVP and provided antioxidant capacity and antimicrobial activity in the films. In particular, the essential oil of lime showed higher antioxidant activity. This fact caused the unwanted modification of other properties, such as the decrease in tensile strength, elastic modulus and increase in OP. The present study revealed the potential use of lime, fennel, and lavender essential oils incorporated into a polymeric yam starch matrix to produce biodegradable active films (antioxidant and antimicrobial). Obtained films showed to be a viable alternative to increase the shelf life of strawberries and protect them against Aspergillus niger.

Properties and Food Packaging Applications of Solvent Casting‐Made Starch‐Based Films Incorporated with Essential Oils: A Review

“…Gómez-Contreras et al [80] Poliblend suweg starch-chitosan Sweet orange peel Apple • Exhibited antibacterial activity for S. aureus bacteria.…”

“…From Table 2, it can be seen that many of the studies on starchbased films incorporated with EOs have been directed toward strawberry preservation. Rodrigues et al, [79] Gómez-Contreras et al, [80] and Campos-Requena et al [85] investigated the application of starch-based films containing EOs on strawberries. This was probably due to the fact that strawberry is one of the highly perishable fruits with a short shelf life.…”

Recovery of (Z)-13-Docosenamide from Industrial Wastewater and Its Application in the Production of Virgin Polypropylene to Improve the Coefficient of Friction in Film Type Applications

“…The various substances used in polymers allow for the improvement in the characteristics of interest at a low cost, and they are classified according to their function [15,16]. These additives can be plasticizers, flame retardants, antioxidants, pigment lubricants, antistatic agents, slip compounds, and heat stabilizers [2,[17][18][19][20]. Some of the most widely used slip compounds are metal stearates, waxes, and fatty acid amides such as erucamide (13-cis-docosenamide, C 22 H 43 NO) and primary oleamide, which have been widely used since the late 1960s on an industrial level [21,22].…”

Iron Oxide Powder as Responsible for the Generation of Industrial Polypropylene Waste and as a Co-Catalyst for the Pyrolysis of Non-Additive Resins

“…With the aim of implementing techniques that allow industrially generated waste to be revalued, thermal and catalytic recording have been studied for the generation of excellent quality products that can be marketed [ 20 ]. However, it is necessary to understand how compounds such as iron oxide can affect the production of polypropylene, generating waste as well as how the autocatalytic thermal degradation of these wastes would affect pyrolysis [ 3 , 21 , 22 , 23 , 24 , 25 ]. It is important to evaluate the presence of iron oxide in the synthesis and autocatalysis of polypropylene, since during the preventive and corrective maintenance of petrochemical plants that are dedicated to the synthesis, production, and commercialization of polypropylene, traces of FeO can be released by cleaning the internal walls of the reactors with high-pressure sand and washing with process water that favors the detachment of trace metals from carbon steel.…”