首页|k-卡拉胶复合紫薯花青素指示膜的制备及应用

k-卡拉胶复合紫薯花青素指示膜的制备及应用

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
本研究以k-卡拉胶和紫薯花青素为原料,采用溶剂浇铸法在不同pH(即4,5,6,7)条件下制备了pH响应指示膜,并采用紫外可见光谱(UV-vis)和傅里叶红外光谱(FT-IR)对指示膜结构进行表征,同时对薄膜的厚度、力学性能、流变性能及全脂灭菌乳变质监测试验等相关性能进行了评估.结果表明,k-卡拉胶和紫薯花青素可能以静电作用或者氢键作用相结合.对比卡拉胶纯膜,发现在pH为4或5时形成膜的拉伸强度略微提高,在pH为6或7时形成膜的拉伸强度((13.13±0.78)MPa或(12.99±0.56)MPa)显著提高,断裂伸长率随着pH地增加而降低.紫薯花青素对膜的热稳定性没有显著影响.pH响应指示膜在不同缓冲溶液中表现出了明显的颜色变化.新鲜牛奶在25 oC下储存72 h后,P7膜表现出明显的颜色变化.综上,该膜具有良好的的物理性能和pH值响应性能,在食品保鲜智能包装中有潜在的应用价值.
Preparation and Application of k-Carrageenan Complex Purple Potato Anthocyanin Indicator Membrane
The pH response indicator membranes were prepared by solvent casting with k-carrageenan and purple potato anthocyanins at different pH values(i.e.,4,5,6,7).The structures of the indicator mem-branes were characterized by UV-vis and FT-IR.The thickness,mechanical properties,rheological prop-erties,and full-fat sterilized emulsion deterioration monitoring test of the film were evaluated.The results showed that k-carrageenan and purple sweet potato anthocyanins could bind by electrostatic or hydrogen bonding.Compared with pure carrageenan membranes,the tensile strength of the membranes formed at pH=4 and pH=5 was slightly increased,and the tensile strength of the membranes formed at pH=6 or pH=7 was significantly increased((13.13±0.78)MPa,(12.99±0.56)MPa),and the elongation at break decreases with the increase of pH.Anthocyanins of purple potato had no significant effect on the thermal stability of the membrane.The pH response indicated that the membrane exhibits a distinct color change in different buffer solutions.After fresh milk was stored at 25℃for 72 h,the P7 membrane showed obvious color change.So the membrane has good physical properties and obvious pH response performance,and has potential application value in food preservation intelligent packaging.

intelligent packagingpurple potato anthocyaninspH responsek-carrageenanmilk

石英、刘盼盼、高莉、杨俊燕、徐宏宇

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中北大学 化学与化工学院,山西 太原 030051

智能包装 紫薯花青素 pH响应 k-卡拉胶 牛奶

山西省回国留学人员科研项目医药生物技术山西省重点实验室开放基金山西省研究生教育教学改革项目山西省研究生创新项目山西省研究生创新项目山西省研究生创新项目

2020-118KF2020022022YJJG1852022Y6162023KY6042023SJ203

2024

10.3969/j.issn.1673-3193.2024.01.015

中北大学学报(自然科学版)
中北大学

中北大学学报(自然科学版)

影响因子：0.258
ISSN：1673-3193
年,卷(期)：2024.45(1)
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