不同涂膜材料对清洁鸡蛋的保鲜效果  

Fresh-keeping effect of different coating materials on clean egg

作　　者：顾凤兰[1] 章建浩[1] 马磊[1] 龙门[2] 黄明明[1] 杨龙平[1] 

机构地区：[1]国家肉品质量与安全控制工程技术研究中心,农业部畜产品加工与质量控制重点开放实验室,食品安全与营养协同创新中心,南京农业大学食品科技学院,南京210095 [2]滁州学院生物与食品工程学院,滁州239000

出　　处：《农业工程学报》2015年第1期303-310,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：江苏省国际科技合作计划项目(BZ2014034)"靶向抑菌功能性纳米保鲜包装新材料研究与应用开发";国家科技支撑计划课题(2012BAD28B01)"动物源食品加工共性关键技术研究"

摘　　要：为对比几种涂膜材料对清洁鸡蛋的涂膜保鲜效果，该文采用聚偏二氯乙烯（polyvinylidene chloride, PVDC）、纳米α-Fe2O3功能改性聚乙烯醇基蜂蜡复合材料和纳米Fe3＋/TiO2功能改性聚乙烯醇基紫胶复合材料3种涂膜材料对清洁鸡蛋进行2次浸涂风干涂膜处理，以未涂膜处理为对照组，在室温条件下（温度17～30℃，相对湿度45～88%）贮藏，检测分析鸡蛋失重率和理化指标。结果表明：在室温条件下，各组鸡蛋的储藏期分别为：对照组21 d， PVDC处理组28 d，纳米Fe3＋/TiO2功能改性聚乙烯醇基紫胶复合膜组35 d，而纳米α-Fe2O3功能改性聚乙烯醇基蜂蜡复合膜组42 d，表明涂膜对鸡蛋储藏期的延长效果显著（P〈0.05）优于对照组。贮藏42 d后，最优组（纳米α-Fe2O3功能改性聚乙烯醇基蜂蜡复合膜组）的鲜蛋率为100%，失重率3.05%，蛋黄指数0.32，哈夫单位值为60.788，pH值为9.2，菌落总数为1.9×10^3CFU/mL，各值都显著优于其余各组（P〈0.05），研究结果为鸡蛋涂膜保鲜技术提供参考。Nano-α-Fe2O3 and beeswax modified polyvinyl alcohol based composite material which had been researched by our lab team before had good antibacterial properties and water-resisting performance. On the basis, this paper will study whether the nano-α-Fe2O3 and beeswax modified polyvinyl alcohol based composite material could extend shelf life of clean eggs or not. Uncoated clean eggs were chosen as control group. Secondary soaking coating method were adopted to coat eggs and the coating process was putting clean eggs into coating liquid for one minute, and being taken out and then being blowing dried, and did the above-mentioned process again. All eggs were preserved in same preserved condition whose temperature and the relative humidity changed as time went on for 42 days. During storage the physical and chemical indicators include the yolk index, Haugh unit, albumen pH, and the egg weight loss were detected every week to determine the egg freshness. The other materials, polyvinylidene chloride and nano-Fe3＋/TiO2 and lac modified polyvinyl alcohol based material, were used as two control groups compared with nano α-Fe2O3 and beeswax modified polyvinyl alcohol based composite material. Their characteristics ,e.g. antibacterial properties and water-resisting performance had been studied before. After storage for 42 days eggs were coated by nano-Fe3＋/TiO2 and lac modified polyvinyl alcohol based material （C group） whose egg grade was B, yolk index was 0.29, Haugh unit was 56.95, and albumen pH value was 9.32, and fresh eggs rate was 100%and the weight loss rate was 3.33%. The clean eggs coated by nanoα-Fe2O3 and beeswax modified polyvinyl alcohol based composite material （B group） had 100%of fresh eggs rate, 3.05%of the weight loss rate , had A egg grade , 0.32 of Yolk index, 60.788 of Haugh unit, and 9.2 of albumen pH value , 1.9×103CFU/mLof total plate count , and were superior to control group and other treatment groups. However, the yolk of A group （ eggs coated by Poly vinylidene chloride） s

关 键 词：贮藏 复合材料 品质控制 聚乙烯醇 纳米Α-FE2O3 清洁鸡蛋 涂膜 

分 类 号：TS206.4[轻工技术与工程—食品科学]