Development and Application of Poly (Lactic Acid)/Poly (Butylene Adipate-Co-Terephthalate)/Thermoplastic Starch Film Containing Salicylic Acid for Banana Preservation

Abstract

Bananas are susceptible to the effects of endogenous enzymatic, leading to their rapid decay and deterioration. In order to mitigate economic losses and prolong the shelf life of bananas, the objective of this study was to develop a new and green gas-regulating packaging film. In this study, an active gas-regulating packaging film was prepared by extrusion, with mobil composition of matter (MCM)-41 loaded with salicylic acid (SA) as the active agent and poly (lactic acid) (PLA), poly (butylene adipate-co-terephthalate) (PBAT), and thermoplastic starch (TPS) as the base materials. The obtained films included PLA/PBAT/TPS, PLA/PBAT/TPS-SA, and PLA/PBAT/TPS-MCSA. These films were subsequently applied to banana preservation. The study focused on the variations in soluble solid content (SSC), rate of weight loss (RWL), malondialdehyde (MDA) content, and polyphenol oxidase (PPO) activity of bananas during the preservation process. The results showed that, compared with the PLA/PBAT/TPS film, the oxygen transmission rate of the PLA/PBAT/TPS-MCSA film increased from 384.36 ± 22.06 cm3·m−2·24 h−1·0.1 MPa−1 to 543.10 ± 3.47 cm3·m−2·24 h−1·0.1 MPa−1. Throughout the preservation period, the PLA/PBAT/TPS-MCSA film exhibited superior performance, effectively retarding the increase in banana SSC, RWL, and MDA while inhibiting the elevation of PPO activity and prolonging the shelf life of bananas by 4–5 days. However, this study needs to further investigate the mechanism of function of MCM-41 loaded with SA in banana preservation.

Structure, Properties, and Recent Developments in Polysaccharide- and Aliphatic Polyester-Based Packaging—A Review

“…Ardjoum et al investigated the mechanical, thermal, and antimicrobial properties of PLA-based film enriched with Thymus vulgaris essential oil and an ethanolic extract of Mediterranean propolis and exhibited its potential as an active food packaging material [180]. PLA-, poly(butylene adipate-co-terephthalate)-, and starch-based films with salicylic acid were prepared and their potential as packaging for bananas was investigated by Ding et al [181]. The authors reported that the shelf-life of bananas could be extended by 4-5 days due to the excellent barrier and mechanical properties of the films [181].…”

“…PLA-, poly(butylene adipate-co-terephthalate)-, and starch-based films with salicylic acid were prepared and their potential as packaging for bananas was investigated by Ding et al [181]. The authors reported that the shelf-life of bananas could be extended by 4-5 days due to the excellent barrier and mechanical properties of the films [181]. Hernandez-Garcia et al evaluated the effect of a multilayer PLA film on the shelf-life of fresh pork meat compared to commercial, high-barrier, multilayer packaging films.…”

Enhanced Preservation of Climacteric Fruit with a Cellulose Nanofiber-Based Film Coating

“…Recently, the need for biodegradable packaging materials has been growing in the storage of fruits to increase shelf-life. Especially, the combination of biodegradable polymers and bioactive natural molecules provides the fruit coating with multifunctionality such as gas regulating, antibacterial, and ultraviolet (UV) barrier properties. − Despite the excellent barrier coating of fruits, biomass-based coating materials are still needed in terms of sustainable resources.…”