Performance of selected emulsifiers and their combinations in the preparation of β-carotene nanodispersions
Performance of selected emulsifiers and their combinations in the preparation of β-carotene nanodispersions
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DOI：
10.1016/j.foodhyd.2008.12.005
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发表时间：
2009-08-01
影响因子：
10.7
通讯作者：
Nakajima, Mitsutoshi
中科院分区：
文献类型：
--
作者：
Yin, Li-Jun;Chu, Boon-Seang;Nakajima, Mitsutoshi
本工作比较了采用溶剂置换技术由酪蛋白酸钠 (SC)、吐温 20、十甘油单月桂酸酯 (ML750) 和蔗糖脂肪酸酯 (L1695) 制备的 β-胡萝卜素纳米分散体的特性。纳米分散体的平均粒径范围为 30 nm 至 206 nm，具体取决于所使用的乳化剂。 SC 稳定的纳米分散体具有最大的粒径，而用 Tween 20 制备的纳米分散体具有最小的粒径。在4℃下储存8周后，纳米分散体的平均粒径和粒径分布通常保持不变，但所有纳米分散体中的β-胡萝卜素含量随着时间的推移而下降。 SC 稳定的纳米分散体中的 β-胡萝卜素是所有样品中抗氧化最稳定的，这很可能是由于颗粒的比表面积小、SC 的物理屏障保护封装的 β-胡萝卜素免受自由基的影响以及酪蛋白的抗氧化活性。还研究了 SC 和 ML750 或 L1695 对平均粒径和 β-胡萝卜素保留的综合影响。与单独使用 ML750 或 L1695 制备的纳米分散体相比，使用 SC-ML750 或 SC-L1695 制备的纳米分散体显示出更大的平均粒径。然而，由于 SC 的抗氧化活性，β-胡萝卜素在这些系统中的稳定性得到了改善。这项工作证明了乳化剂在确定 β-胡萝卜素纳米分散体的特性和稳定性方面的重要性。 (C) 2008 Elsevier Ltd. 保留所有权利。
In this work, the characteristics of beta-carotene nanodispersions prepared with sodium caseinate (SC), Tween 20, decaglycerol monolaurate (ML750) and sucrose fatty acid ester (L1695) using solvent displacement technique were compared. The mean particle size of the nanodispersions ranged from 30nm to 206nm, depending on the emulsifier used. SC-stabilized nanodispersions had the largest particles size, while those prepared with Tween 20 had the smallest. The mean particle size and size distribution of the nanodispersions generally remained unchanged after 8 weeks of storage time at 4 degrees C, but the beta-carotene content in all nanodispersions decreased over time. The beta-carotene in SC-stabilized nanodispersions was the most stable against oxidation among all samples, most likely due to the small specific surface area of the particles, physical barrier of SC protecting the encapsulated beta-carotene against free radicals and the antioxidative activity of caseins. The combined effect of SC and ML750 or L1695 on the mean particle size and beta-carotene retention was also investigated. Nanodispersions prepared with SC-ML750 or SC-L1695 showed larger mean particle sizes compared to those prepared with ML750 or L1695 alone. However, the stability of beta-carotene in these systems was improved owing to the antioxidative activity of SC. This work demonstrated the importance of emulsifier in determining the characteristics and stability of beta-carotene nanodispersions. (C) 2008 Elsevier Ltd. All rights reserved.