Medina-Jaramillo Carolina, Quintero-Pimiento Carmen, Gómez-Hoyos Catalina, Zuluaga-Gallego Robin, López-Córdoba Alex
Facultad Seccional Duitama, Escuela de Administración de Empresas Agropecuarias, Universidad Pedagógica y Tecnológica de Colombia, Carrera18 con Calle 22, Duitama 150461, Colombia.
Programa de Ingeniería en Nanotecnología, Universidad Pontificia Bolivariana, Circular 1° N° 70-01, Medellín 050031, Colombia.
Polymers (Basel). 2020 Apr 5;12(4):824. doi: 10.3390/polym12040824.
Edible coatings and films are appealing strategies for the postharvest management of blueberries. In the current work, alginate and alginate/cellulose nanofibril (CNF) edible coatings crosslinked with calcium chloride were developed for application on Andean blueberry (a promissory wild blueberry). Cocoa by-products were valorized through the isolation of their CNFs, and these were incorporated in the edible coatings. Edible coating formulations were based on blends of alginate (2% /), CNFs (0%, 0.1%, or 0.3%), glycerol, and water. In addition, stand-alone films were prepared, and their light and water vapor barrier properties were studied before applying the coating on the fruit surface. The results show that the addition of CNFs caused a significant decrease in the transparency and the water vapor permeability of the alginate films. After applying on the Andean blueberry fruits, the alginate and alginate/CNF coatings enhanced the appearance and the firmness of the fruits. Moreover, they significantly reduced the respiration rate and the water loss of the Andean blueberries throughout the 21 days of refrigerated storage. Alginate and alginate/CNFs coatings may be considered a useful alternative for the delay of the postharvest deterioration of Andean blueberries.
可食用涂层和薄膜是蓝莓采后管理的有吸引力的策略。在当前的工作中，开发了与氯化钙交联的藻酸盐和藻酸盐/纤维素纳米纤维（CNF）可食用涂层，用于安第斯蓝莓（一种有前景的野生蓝莓）。通过分离可可副产品中的CNF对其进行了增值利用，并将这些CNF纳入可食用涂层中。可食用涂层配方基于藻酸盐（2%/）、CNF（0%、0.1%或0.3%）、甘油和水的混合物。此外，还制备了独立的薄膜，并在将涂层应用于果实表面之前研究了它们的光和水蒸气阻隔性能。结果表明，添加CNF导致藻酸盐薄膜的透明度和水蒸气透过率显著降低。将其应用于安第斯蓝莓果实后，藻酸盐和藻酸盐/CNF涂层改善了果实的外观和硬度。此外，它们在21天的冷藏储存期间显著降低了安第斯蓝莓的呼吸速率和水分损失。藻酸盐和藻酸盐/CNF涂层可被视为延缓安第斯蓝莓采后变质的有用替代品。
