Properties of gelatin/chitosan blend films incorporated with betel leaf ethanolic extract loaded in liposomes and their use as pouches for shrimp oil packaging

Abstract

Properties of gelatin/chitosan blend films plasticised with different plasticisers and incorporated with liposomes loaded with betel leaf ethanolic extract (L/BLEE) at 2% or BLEE at an equivalent amount were investigated. Films plasticised with glycerol (GLY) and incorporated with BLEE (B-GLY) showed better properties (P < 0.05) than other films (F-GLY, LB-GLY, F-PEG, B,PEG and LB-PEG). Type of plasticiser had no effect on antioxidant activities of films (P > 0.05). SEM images of the films revealed homogenous surface and cross-section in film samples devoid of active compounds, while those incorporated with BLEE or L/BLEE had rougher surfaces and cross-sections. During storage at room temperature, lower oxidation took place in shrimp oil packaged in pouches made from gelatin/chitosan blend plasticised with GLY and incorporated with BLEE (B-GLY) compared with that packaged in lower density polyethylene (LDPE) pouches. Therefore, B-GLY films could be used as active packaging to retard lipid oxidation in shrimp oil.

Packaging films based on biopolymers from seafood processing wastes: Preparation, properties, and their applications for shelf‐life extension of seafoods—A comprehensive review

“…Chitosan, a deacetylated form of chitin, has various applications in agriculture, biomedicine, and wastewater treatment (Mittal et al., 2021). Chitosan has been used widely for film preparation and coatings, which have antimicrobial properties, making them ideal for food packaging, reducing spoilage, and extending the shelf life of products, including perishable seafoods (Tagrida et al., 2022a). The yield of chitosan from shrimp shells ranged from 12.9% to 25%, whereas the yield of chitin was higher (37.6%) (Borić et al., 2018).…”