次氯酸钠杀菌结合聚乙烯醇基纳米SiO2复合材料涂膜对鸭蛋保鲜效果的影响

Effect of sodium hypochlorite disinfection combined with polyvinyl alcohol-based composite packaging material with nano-SiO_2 coating on fresh-keeping of duck eggs

为探究次氯酸钠杀菌结合聚乙烯醇基纳米SiO_2复合材料涂膜对鸭蛋的保鲜效果,本实验分别采用次氯酸钠杀菌、聚乙烯醇基纳米SiO_2复合材料涂膜和次氯酸钠杀菌结合聚乙烯醇基纳米SiO_2复合材料涂膜处理新鲜鸭蛋。动态测定35 d贮藏过程中各组鸭蛋的失重率、菌落总数、哈夫单位和蛋黄指数的变化情况,比较贮藏后各组鸭蛋蛋壳色度和熟制鸭蛋质构变化。结果表明:与对照组相比,三个处理组鸭蛋的失重率和菌落总数均显著降低(p<0.05),杀菌结合涂膜组的失重率和菌落总数最小,分别为2.79%±0.19%、(4.83±0.42)lg cfu/g;三个处理组鸭蛋的哈夫单位和蛋黄指数均显著增加(p<0.05),杀菌结合涂膜组的哈夫单位(76.09±4.15)和蛋黄指数(0.40±0.02)最大,且与贮藏前的新鲜蛋无显著性差异(p>0.05);杀菌结合涂膜处理对鸭蛋质构特性无显著影响(p>0.05),但可使蛋壳亮度显著提高(p<0.05)。由此可见,三种处理方式均能显著逆转鸭蛋品质的劣变,次氯酸钠杀菌结合聚乙烯醇基纳米SiO_2复合材料涂膜的保鲜效果最佳,显著优于单独的次氯酸钠杀菌和聚乙烯醇基纳米SiO_2复合材料涂膜(p<0.05),该研究为杀菌结合复合材料涂膜在禽蛋保鲜上的应用提供参考。

To evaluate the effect of sodium hypochlorite disinfection combined with polyvinyl alcohol-based composite packaging material with nano-SiO_2 coating on fresh-keeping of duck eggs,the fresh eggs were treated by sodium hypochlorite disinfection,polyvinyl alcohol-based composite packaging material with nano-SiO_2 coating,and sodium hypochlorite disinfection combined with polyvinyl alcohol-based composite packaging material with nano-SiO_2 coating. All the duck eggs were stored at the same condition for 35 days and the changes of weight loss rate,total plate count,Hough units and yolk index value of duck eggs in each group were detected during storage process.The changes of the eggshell color and texture properties of duck eggs by three fresh-keeping treatments were also detected after storage. The results revealed that the weight loss rate and total plate count of duck eggs in three fresh-keeping groups were significantly decreased in comparison with control group（ p 〈0.05）,and the disinfection combined with coating showed the lowest weight loss rate（ 2.79% ± 0.19%） and total platecount（ 4.83 ± 0.42） lg cfu/g. The Hough units and yolk index value of duck eggs in three fresh-keeping groups were significantly increased in comparison with control group（ p〈 0.05）,and the disinfection combined with coating showed the highest Hough units（ 76.09 ± 4.15） and yolk index value（ 0.40 ± 0.02）,with no obvious difference to the fresh eggs before storage.In addition,the texture properties of eggs treated by disinfection combined with coating showed no significant difference relative to control group（ p〈 0.05）,but the brightness was notably improved（ p〈 0.05）.In conclusion,the three fresh-keeping treatments were significantly reversed the decline of the quality of duck eggs in comparison with control group（ p 〈0.05）.To be mentioned,sodium hypochlorite disinfection combined with polyvinyl alcohol-based composite packaging material with nanoSiO_2 coating exhibited the best fresh-keeping effect,which was significantly better than treated by sodium hypochlorite disinfection and polyvinyl alcohol-based composite packaging material with nano-SiO_2 coating alone（ p 〈0.05）. This study might provide reference for the application of disinfection combined with composite packaging material coating in the preservation of fresh eggs.