马铃薯淀粉/聚乙烯醇/微晶纤维素/洛神花花青素-草酸指示膜的制备与应用  

Preparation and Applications of Potato Starch/Polyvinyl Alcohol/Microcrystalline Cellulose/Roselle Anthocyanin-Oxalic Acid Indicator Films

作　　者：程颖 张发茜 段绪林 彭博 汤俊炀 陈赛艳 CHENG Ying;ZHANG Faxi;DUAN Xulin;PENG Bo;TANG Junyang;CHEN Saiyan(College of Food Science,Sichuan Agricultural University,Yaan 625014;College of Food Science and Nutrition Engineering,China Agricultural University,Beijing 100193)

机构地区：[1]四川农业大学食品学院,四川雅安625014 [2]中国农业大学食品科学与营养工程学院,北京100193

出　　处：《塑料工业》2025年第3期92-101,共10页China Plastics Industry

基　　金：国家级大学生创新创业训练计划项目(202310626025);四川省科技厅项目(2020YFN0147);四川省科技创新苗子工程资助项目(2021106)。

摘　　要：针对洛神花花青素因分子中含有羟基而稳定性较差的问题,本研究采用草酸对洛神花花青素进行共着色,并加入马铃薯淀粉、聚乙烯醇和微晶纤维素制备了马铃薯淀粉/聚乙烯醇/微晶纤维素/洛神花花青素-草酸指示膜。研究指示膜的色度、pH响应性、微观结构、拉伸性能和光热稳定性等性能,并将指示膜应用于鲜切鱼肉新鲜度监测中。结果表明,共着色后的洛神花花青素薄膜的拉伸性能、光热稳定性有所提升,含有质量分数6%的洛神花花青素-草酸指示膜的拉伸强度为5.08 MPa,断裂伸长率为10.29%,含水率为12.84%,色度偏红,透明度较高且该指示膜的稳定性较好。将指示膜用于监测鱼肉的新鲜度,发现在4℃贮藏环境下,鱼肉的TVB-N由6.31 mg/100g增加到33.39 mg/100g,pH值上升到8.62,指示膜由粉红色变成灰粉色,色差可见。研究结果可为草酸共着色的洛神花花青素在鱼类新鲜度指示膜中的应用提供参考。For the poor stability of Roselle anthocyanin due to hydroxyl groups in their molecules,the Roselle anthocyanin was cocolored by oxalic acid,and the potato starch/polyvinyl alcohol/microcrystalline cellulose/Roselle anthocyanin-oxalic acid indicator films were prepared by adding potato starch,polyvinyl alcohol and microcrystalline cellulose extra.The color,pH responsiveness,microstructure,mechanical properties,and photo-thermal stability of indicator films were studied and the films were applied to monitor the freshness of freshly cut fish.The results show that the mechanical properties and photo-thermal stability of the co-colored Roselle anthocyanin films were improved.The tensile strength,elongation at break and moisture capacity of the Roselle anthocyanin-oxalic acid indicator film containing a 6%mass fraction co-colored anthocyanin are respectively 5.08 MPa,10.29%and 12.84%,its film color is reddish,the transparency and stability of this indicator film are excellent.This indicator film was used to monitor the freshness of the fish.The results show that,under 4℃,the TVB-N of fish is increased from 6.31 mg/100g to 33.39 mg/100g,the pH value is increased to 8.62,the indicator film color changes from pink to gray pink,and the color difference is visible.The results could provide references for the applications of Roselle anthocyanins co-colored with oxalic acid in fish freshness indicator films.

关 键 词：共着色 草酸 洛神花花青素 pH指示膜 新鲜度监测 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]