Abstract
The lack of precise equilibrium gas permeability affects the application of edible coatings. This study aims to precisely control the coating oxygen permeability through layer-by-layer (LbL) assembly. The coatings fabricated by chitosan (CS) and sodium alginate (SA) were systematically investigated about assembly mechanism, growth law, barrier performance, and application. Results showed that coating assembly was driven by the electrostatic interaction between CS and SA. The fastest coating growth was the pH of SA and CS at 4 and the NaCl concentration at 0.1 mol/L. The coating with a specific barrier performance had been proved to be accurately fabricated by adjusting the assembly concentration and times. Finally, coating combinations with the desired oxygen-barriers for strawberries, tangerines, and bananas were predicted based on the gas exchange model and fabricated by LbL. The physiological properties of the coated fruits indicated that the optimal LbL coating extended the shelf life of strawberries, tangerines and bananas by 2, 4, and 4 days, respectively. This research may help to precisely control the properties of coatings during the preparation and application of edible coatings.
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Funding
The work described in this article was supported by National Natural Science Foundation of China (32172326), Modern agriculture in Jiangsu Province—key and general projects (BE2019362), Science and technology planning project of Jiangsu market supervision and Administration Bureau (KJ204132, KJ21125006), the Open Project of Engineering Research Center of Dairy Quality and Safety Control Technology of Ministry of Education of China (R202101), Suzhou science and technology development plan (SS2019016), the Project funded by China Postdoctoral Science Foundation (2020M680064), and the Postdoctoral Research Startup Fee of Jiangnan University (1025219032200190).
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Yuhang Du carried out data conceptualization, investigation, data sorting and writing on the content of the paper. Fangwei Yang and Hang Yu also participated in image production and data sorting. Yunfei Xie and Weirong Yao participated in writing, reviewing, revising and supervising. All authors reviewed the manuscript.
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Du, Y., Yang, F., Yu, H. et al. Controllable Fabrication of Edible Coatings to Improve the Match Between Barrier and Fruits Respiration Through Layer-by-Layer Assembly. Food Bioprocess Technol 15, 1778–1793 (2022). https://doi.org/10.1007/s11947-022-02848-7
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DOI: https://doi.org/10.1007/s11947-022-02848-7