Jeong Chang-Hwan, Lee Sol-Hee, Kim Hack-Youn
Department of Animal Resources Science, Kongju National University, Yesan-Gun 32439, Korea.
Polymers (Basel). 2022 May 10;14(10):1940. doi: 10.3390/polym14101940.
This study analyzes the food storage stability of biodegradable containers made of pork skin gelatin polymer. Packaging materials were prepared with different proportions of walnut shell powder, including 10% (W10), 20% (W20), and polyethylene packaging (PE) as a control. To analyze storage stability, parameters such as pH, thiobarbituric acid reactive substance (TBARS), volatile basic nitrogen (VBN), microbial population, and color were measured. The pH, yeast and mold, redness, and yellowness of W10 and W20 had no significant difference compared to those of PE in all storage periods (p > 0.05). The TBARS of W20 was shown to slowly increase compared to W10. The VBN concentration of W10 and W20 were significantly higher than that of PE in the first and second weeks, but there was no significant difference in the third week (p < 0.05). The total bacterial counts of W10 and W20 were significantly higher than that of PE during the first week (p < 0.05), but there was no significant difference thereafter (p > 0.05). The lightness values of W10 and W20 were significantly lower than that of PE in the second and third weeks (p < 0.05). These results indicated that biodegradable containers containing up to 20% walnut shell powder can substitute plastic packaging materials.
本研究分析了由猪皮明胶聚合物制成的可生物降解容器的食品储存稳定性。制备了含有不同比例核桃壳粉的包装材料，包括10%（W10）、20%（W20），并以聚乙烯包装（PE）作为对照。为了分析储存稳定性，测量了pH值、硫代巴比妥酸反应性物质（TBARS）、挥发性盐基氮（VBN）、微生物数量和颜色等参数。在所有储存期内，W10和W20的pH值、酵母和霉菌数量、红度和黄度与PE相比均无显著差异（p>0.05）。与W10相比，W20的TBARS显示出缓慢增加。在第一周和第二周，W10和W20的VBN浓度显著高于PE，但在第三周无显著差异（p<0.05）。在第一周，W10和W20的总细菌数显著高于PE（p<0.05），但此后无显著差异（p>0.05）。在第二周和第三周，W10和W20的亮度值显著低于PE（p<0.05）。这些结果表明，含有高达20%核桃壳粉的可生物降解容器可以替代塑料包装材料。
