Hromiš Nevena, Ostojić Sanja, Pezo Lato, Popović Senka, Šumić Zdravko, Milić Anita, Kocić-Tanackov Sunčica, Šuput Danijela
Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia.
Institute of General and Physical Chemistry, University of Belgrade, Studentski Trg 12, 11000 Belgrade, Serbia.
Polymers (Basel). 2024 Dec 21;16(24):3583. doi: 10.3390/polym16243583.
Composite biopolymer hydrogel as food packaging material, apart from being environmentally favorable, faces high standards set upon food packaging materials. The feature that favors biopolymer film application is their low gas permeability under room conditions and lower relative humidity conditions. However, most biopolymer-based materials show high moisture sensitiveness and limited water vapor permeability, which limits their application for food packaging. In this paper, a new packaging material derived from an edible oil industry byproduct (pumpkin oil cake) coated with a thin layer of paraffin wax was obtained. Compared to the film without wax coating, the new material showed reduced water sensitivity and significantly reduced water vapor transmission rate (56.98 ± 7.42 g/m 24 h). The new material was tested for packing dry apricot slices under a modified atmosphere (100% N). Gas composition in PuOC/wax pouches' headspace was minimally changed during 105 days of storage. The low moisture content (6.76-10.60%) of dried apricot slices was preserved throughout the storage period ( > 0.05), as well as high rehydration power (65-75%). Changes in sensorial properties during storage were minimal. Total phenol content was minimally reduced during storage, followed by antioxidant activity (FRAP and ABTS trial). The microbial profile of dried apricot slices showed that a safe product was obtained throughout the storage. Considering the results, the functionality of new material for packing dry apricots under a modified atmosphere was proven.
复合生物聚合物水凝胶作为食品包装材料，除了对环境有利外，还面临着食品包装材料所设定的高标准。有利于生物聚合物薄膜应用的特性是它们在室温条件和较低相对湿度条件下具有低气体渗透性。然而，大多数基于生物聚合物的材料表现出高湿度敏感性和有限的水蒸气渗透性，这限制了它们在食品包装中的应用。在本文中，获得了一种由食用油工业副产品（南瓜油饼）衍生的新型包装材料，该材料涂覆有一层薄石蜡。与未涂蜡的薄膜相比，新材料表现出更低的水敏感性和显著降低的水蒸气透过率（56.98±7.42 g/m²4 h）。对新材料在改良气氛（100% N）下包装干杏片进行了测试。在105天的储存期间，PuOC/蜡袋顶空的气体组成变化极小。干杏片的低水分含量（6.76 - 10.60%）在整个储存期间得以保持（>0.05），同时还具有高复水能力（65 - 75%）。储存期间感官特性的变化极小。储存期间总酚含量降低极小，其次是抗氧化活性（FRAP和ABTS试验）。干杏片的微生物概况表明在整个储存过程中获得了安全产品。考虑到结果，证明了新材料在改良气氛下包装干杏的功能。
