基于黑苹果果皮花青素的虾鲜度指示膜的制备及应用  

Preparation and Application of Shrimp Freshness Indicator Film Based on Black Apple Peel Anthocyanin

作　　者：陈柯君 杨周昊 余虹达 程桂广[1] 覃宇悦[1] 李琳[2] CHEN Kejun;YANG Zhouhao;YU Hongda;CHENG Guiguang;QIN Yuyue;LI Lin(Faculty of Food Science and Engineering,Kunming University of Science and Technology,Kunming 650600,China;School of Life and Health Technology,Dongguan University of Technology,Dongguan 523808,China)

机构地区：[1]昆明理工大学食品科学与工程学院,云南昆明650600 [2]东莞理工学院生命健康技术学院,广东东莞523808

出　　处：《食品科学》2023年第21期274-281,共8页Food Science

基　　金：云南省教育厅科学研究基金研究生项目(2023Y0446);国家自然科学基金地区科学基金项目(32060569,22268024)。

摘　　要：以壳聚糖(chitosan,CS)、海藻酸钠(sodium alginate,SA)为成膜基材,通过添加黑苹果果皮花青素(black apple peel anthocyanin,BAA)提取物制备智能指示膜(CS-SA-BAA薄膜),并将其应用于虾新鲜度监测。分析比较BAA提取物添加量对复合薄膜微观形貌、厚度、颜色、机械性能、水分质量分数、紫外线透过率等的影响;并进一步研究利用复合薄膜监测虾新鲜度的可行性。结果表明:添加BAA提取物到复合薄膜中使组分之间发生了相互作用,BAA提取物在复合薄膜中分散良好,且复合薄膜机械性能得到显著提升,水分质量分数和紫外线透过率下降。此外,BAA提取物在pH 1~14范围内颜色由红色变为黄色,对酸碱度有明显响应,含有15%BAA提取物的复合薄膜对pH值敏感,可将其应用于虾新鲜度指示。在4℃下贮藏的第5天,虾的总挥发性盐基氮含量和pH值超过了虾的腐败阈值,表明虾已经腐败,同时复合薄膜的颜色由最初的红色变为深灰色。因此,CS-SA复合膜可作为良好的载体固定BAA以制备智能指示膜,用于虾新鲜度监测。An intelligent indicator film was prepared with chitosan(CS)and sodium alginate(SA)as film-forming material with added black apple peel anthocyanin(BAA).The effects of different concentrations of BAA on the microstructure,thickness,color,mechanical properties,moisture content,and ultraviolet(UV)transmittance of the composite film were analyzed and compared.In addition,the feasibility of applying the composite film for monitoring shrimp freshness was studied.The results showed that addition of BAA made the components of the composite film interact with each other.BAA was well dispersed in the composite film,which significantly improved the mechanical properties of the composite film,and reduced its water content and UV transmittance.Furthermore,the color of BAA changed from red to yellow in the pH range of 1–14,which showed an obvious respond to pH.The composite film containing 15%BAA was sensitive to pH and thus could be used for monitoring shrimp freshness.On the 5th day of storage at 4℃,the total volatile basic nitrogen(TVB-N)content and pH of shrimp exceeded the spoilage threshold,indicating shrimp spoilage,and the color of the film changed from red to dark gray.Therefore,CS-SA composite films can be used as a good carrier for BAA to prepare an intelligent indicator film for shrimp freshness monitoring.

关 键 词：智能指示膜 壳聚糖 海藻酸钠 黑苹果果皮 虾新鲜度 

分 类 号：TS206.4[轻工技术与工程—食品科学]