PJB-2022-316
Fibroin/chitosan based composite preservatives for longan postharvest preservation
Thuy Thi Le Bui
Abstract
Fibroin/chitosan based composite preservatives (FCCPs) for longan postharvest preservation were prepared from silk fibroin extracted from silkworm cocoons. The tensile stress at break and water uptake, which govern the efficiency of FCCPs, were adjusted by controlling the amount of polyvinyl alcohol (PVA) and beeswax (BW) additives. To preserve longans, thin films of FCCPs were coated on the fruit peels. The fibroin/chitosan films extended shelf life, reduced browning index and poilage rate, retarded weight loss and respiratory rate, inhibited the quality decrease of fresh longan fruit. The additives increase the preservation potential of FCCPs. The FCCPs can extend the shelf-life of longan fruits up to 30 days storaged at 5oC and relative humidity of 90-95%.
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