Abstract
SummaryProperties 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.
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