_胡萝卜素液晶的制备及其稳定性研究
时间:2025-03-09
时间:2025-03-09
_胡萝卜素液晶的制备及其稳定性研究
※基础研究食品科学
2009, Vol. 30, No. 1111
β-胡萝卜素液晶的制备及其稳定性研究
颜秀花1,2,王正武1,*,刘 峰1
(1.上海交通大学农业与生物学院,上海 200240;2.盐城工学院化学与生物工程学院,江苏 盐城 224003)摘 要:通过绘制拟三元相图对食品级β-胡萝卜素的液晶配方和工艺进行研究;用偏光显微镜、流变学方法等对非离子表面活性剂EL-35/丁酸乙酯/水的溶致液晶的形成、微观结构、动态流变性质及体系相态进行研究;对相同浓度β-胡萝卜素的液晶、微乳液和丁酸乙酯溶液进行光和pH值稳定性实验。结果表明:25℃下,β-胡萝卜素在EL-35:丁酸乙酯:水=1:1:1体系的液晶、微乳液和油溶液中对光都比较敏感,但在液晶中相对稳定:pH值对微乳液和丁酸乙酯油溶液中的β-胡萝卜素稳定性有影响,对液晶中的几乎没有影响。关键词:β-胡萝卜素;溶致液晶;制备;稳定性
Preparation and Stability of β-Carotene Liquid Crystal
YAN Xiu-hua1,2,WANG Zheng-wu1,*,LIU Feng1
(1. School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China;2. College of Chemical and Biological,Yancheng Institute of Technology,Yancheng 224003, China)
Abstract :Pseudo ternary phase diagram was conducted using water titration method to choose emulsifier EL-35-ethyl butyrate-water system to prepare β-carotene liquid crystal, and the microstructures and rheological properties of 4 emulsifier EL-35-ethylbutyrate-water systems (A1, A2, A3 and A4) with different water masses (the mass ratio of emulsifier EL-35 to ethyl butyratewere fixed at 5:5) were characterized with polarizing microscopy and rheometer. Effects of external conditions, including pHvalue, preservative (sodium benzoate), saturated ethyl butyrate solution of β-carotene and water amount on stability of this systemwere discussed. Furthermore, effects of sunlight and pH on the stability of β-carotene were compared in different multiphasesystems, including liquid crystal, microemulsion and ethyl butyrate solution. Results revealed that the optimal mass ratio of EL-35 to ethyl butyrate to water was 1:1:1, and other three external conditions had little effects on the stability of emulsifier EL-35-ethyl butyrate-water system. β-carotene contained in liquid crystal was sensitive, but more stable to light at 25 ℃ than that inethyl butyrate solution and in microemulsion. pH value exhibited marked effects on the stability of the latter two, but little effecton that of the former. Therefore, l …… 此处隐藏:770字,全部文档内容请下载后查看。喜欢就下载吧 ……
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