Safe coating formulated from biopolymer can be an alternative for better packaging for fruits. Among biopolymers used for safe coating, polysaccharides attracted more attention due to its biocompatibility and edibility. However, polysaccharide-based materials have weaknesses such as low water barrier and mechanical properties which result in lower capability on preserving the coated fruits. Hence, the incorporation of nanoparticles (NPs) such as zinc oxide (ZnO) is expected to increase the ability of polysaccharide-based coating for the enhancement of fruit shelf life. In this review paper, the basic information and the latest updates on the incorporation of ZnO NPs into the polysaccharide-based safe coating for fruit are presented. Various research has investigated polysaccharide-ZnO nanocomposite safe coating to prolong the shelf life of fruits. The polysaccharides used include chitosan, alginate, carrageenan, cellulose, and pectin. Overall, polysaccharide-ZnO nanocomposites can improve the shelf life of fruits by reducing weight loss, maintaining firmness, reducing the ripening process, reducing respiration, reducing the oxidation process, and inhibiting microbial growth. Finally, the challenges and potential of ZnO NPs as an active agent in the safe coating application are also discussed.

中文翻译：

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多糖-氧化锌纳米复合材料作为防腐剂用于水果保鲜的研究进展

由生物聚合物制成的安全涂层可以替代水果的更好包装。在用于安全涂层的生物聚合物中，多糖由于其生物相容性和可食用性而引起了更多关注。然而，基于多糖的材料具有诸如低阻水性和机械性能的弱点，这导致较低的保存带涂层水果的能力。因此，预期掺入纳米颗粒（NP）例如氧化锌（ZnO）将增加基于多糖的包衣延长水果货架期的能力。在这篇综述文件中，介绍了将ZnO NPs掺入基于多糖的水果安全涂层中的基本信息和最新更新。各种研究已经研究了多糖-ZnO纳米复合安全涂料，以延长水果的货架期。所使用的多糖包括壳聚糖，藻酸盐，角叉菜胶，纤维素和果胶。总体而言，多糖-ZnO纳米复合材料可通过减少重量减轻，保持硬度，减少成熟过程，减少呼吸作用，减少氧化过程并抑制微生物生长来改善水果的货架期。最后，还讨论了在安全涂层应用中作为活性剂的ZnO NP的挑战和潜力。