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    Preparation of zein/chitosan/eugenol/curcumin active films for blueberry preservation

    Year: 2022

    Journal: Int. J. Biol. Macromol., Volume 223, DEC 31, page 1054–1066

    Authors: Ren, Manni; Cai, Zhe; Chen, Li; Wahia, Hafida; Zhang, Li; Wang, Yang; Yu, Xiaojie; Zhou, Cunshan

    Organizations: National Natural Science Foundation of China [32072174]; Open Fund Project of Modern Agricultural Equipment and Technology Collaborative Innovation Center [XTCX2019]; Social Development General Project of Jiangsu [BE2020776]; Jiangsu Agricultural Science and Technology Innovation Fund [CX (21) 2026, CX (20) 3168)]; Jiangsu Funding Program for Excellent Postdoctoral Talent fund [2022ZB674]; Basic Science Research Funding for Universities in Heilongjiang [135409409]; 2021 Modern Agricultural Equipment-Influence of Physical Field on the Intrinsic Quality of Agricultural Products in Physical Processing and Regulation Techxxssnology [4091360001]

    Keywords: Curcumin; Active packaging; Zein; Chitosan; Antioxidant; Eugenol

    This study aimed to develop zein/chitosan-based films formulated with curcumin and eugenol to improve the quality of postharvest blueberries. First, the film-forming solutions were characterized (rheological property and water distribution), and the mechanical, structural properties and bioactivity of active films fabricated by casting were evaluated. Further, the active film was coated with blueberry stored at 4 degrees C, and physicochemical prop-erties (weight loss, hardness, microbial counts, and appearance changes) were measured. The film-forming so-lutions exhibited non-Newtonian behavior. The incorporation of curcumin and eugenol improved the tensile strength and elongation at the break of films, reaching 17.86 MPa and 92.80 %, respectively. The antioxidant capacity was enhanced, and DPPH and ABTS radical scavenging rates were up to 90.60 +/- 0.06 % and 86.34 +/- 0.39 %, respectively. Meanwhile, the prepared active films possessed good anti-UV and sensitive pH-response color-shifting ability. Compared to the uncoated blueberry, blueberry coated with zein/chitosan/curcumin/ eugenol showed lower weight loss and higher hardness, indicating that the prepared active films played a vital role in delaying the deterioration of blueberry and extending its shelf life. Overall, the zein-chitosan incorporated with curcumin and eugenol films could be a promising candidate to prolong the shelf life of food products due to their excellent bioactive capacity.
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