CAJ | 학술논문

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1.9×103CFU/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。
위대비궤충도막재료대청길계단적도막보선효과，해문채용취편이록을희（polyvinylidene chloride, PVDC）、납미α-Fe2O3공능개성취을희순기봉사복합재료화납미Fe3+/TiO2공능개성취을희순기자효복합재료3충도막재료대청길계단진행2차침도풍간도막처리，이미도막처리위대조조，재실온조건하（온도17～30℃，상대습도45～88%）저장，검측분석계단실중솔화이화지표。결과표명：재실온조건하，각조계단적저장기분별위：대조조21 d， PVDC처리조28 d，납미Fe3+/TiO2공능개성취을희순기자효복합막조35 d，이납미α-Fe2O3공능개성취을희순기봉사복합막조42 d，표명도막대계단저장기적연장효과현저（P<0.05）우우대조조。저장42 d후，최우조（납미α-Fe2O3공능개성취을희순기봉사복합막조）적선단솔위100%，실중솔3.05%，단황지수0.32，합부단위치위60.788，pH치위9.2，균락총수위1.9×103CFU/mL，각치도현저우우기여각조（P<0.05），연구결과위계단도막보선기술제공삼고。
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. <br> 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. <br> 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) spreaded out at 35 days and control group (CK group) was at 28 days. The initial values of A group such as the egg weight loss rate and yolk index and albumen pH were better than other groups, and after 21 days storage they were worse than the other coating groups. <br> The results showed that the quality of coating eggs were better than the eggs of control group under the same storage conditions, and the eggs coated by nano-a-Fe2O3 and beeswax modified polyvinyl alcohol based composite material had the best quality. The change of temperature and humidity would influence material barrier performance e.g. the preservation effect of polyvinylidene chloride reduced as humidity changed. In addition, the cost of nano-α-Fe2O3 and beeswax modified polyvinyl alcohol based composite material was lower and its operation process was simple, so that it would have the prospect of industrial application.