Amariei Sonia, Ursachi Florin, Petraru Ancuţa
Faculty of Food Engineering, Stefan cel Mare University of Suceava, 720229 Suceava, Romania.
Membranes (Basel). 2022 May 31;12(6):576. doi: 10.3390/membranes12060576.
The paper analyzes the possibility of replacing the polyethylene packaging from food products with biodegradable packaging obtained from biopolymers. The proposed packaging materials were obtained from polysaccharides (alginate, agar), glycerol as plasticizer. To improve the properties necessary for the coating materials, two groups of membranes were made, one with ascorbic acid (AA, 0.1-0.45 g) in 150 mL filmogenic solution and the other with calcium chloride (CaCl, 0.02-0.1 g) in 150 mL filmogenic solution. The membranes were analyzed for mechanical properties, light transmission, transparency and barrier properties (water vapor, oxygen, or fatty substances). The results demonstrated that the addition of AA (0.1 g), increases tensile strength, transparency, oxygen and water barrier properties. On the other hand, the addition of calcium chloride (0.08 g) increased the hardness, tensile strength and opacity of the membranes. Moreover, it ensured a uniform distribution of the mixture components. The uniformization of the mixture components in the presence of AA and CACl was observed by SEM and roughness analysis. Hydrogen bonding interactions between the biopolymers and the additives used were highlighted by FTIR analysis. All membranes have shown very good UV absorption. The results suggest that agar/alginate/glycerol membranes with AA and CaCl have the potential to be used in an active food packaging system.
本文分析了用生物聚合物制成的可生物降解包装替代食品聚乙烯包装的可能性。所提出的包装材料由多糖（海藻酸盐、琼脂）、甘油作为增塑剂制成。为改善涂层材料所需的性能，制作了两组膜，一组在150 mL成膜溶液中加入抗坏血酸（AA，0.1 - 0.45 g），另一组在150 mL成膜溶液中加入氯化钙（CaCl，0.02 - 0.1 g）。对这些膜进行了机械性能、透光率、透明度和阻隔性能（水蒸气、氧气或脂肪物质）分析。结果表明，添加AA（0.1 g）可提高拉伸强度、透明度、氧气和水汽阻隔性能。另一方面，添加氯化钙（0.08 g）可提高膜的硬度、拉伸强度和不透明度。此外，它确保了混合物成分的均匀分布。通过扫描电子显微镜和粗糙度分析观察到在AA和CaCl存在下混合物成分的均匀化。傅里叶变换红外光谱分析突出了生物聚合物与所用添加剂之间的氢键相互作用。所有膜都表现出非常好的紫外线吸收性能。结果表明，含有AA和CaCl的琼脂/海藻酸盐/甘油膜有潜力用于活性食品包装系统。
