Solubilization of moderately hydrophobic 17α-ethinylestradiol by mono- and di-rhamnolipid solutions
Solubilization of moderately hydrophobic 17α-ethinylestradiol by mono- and di-rhamnolipid solutions
复制标题
单鼠李糖脂溶液和二鼠李糖脂溶液溶解中等疏水性 17α-炔雌醇
DOI：
10.1016/j.colsurfa.2013.12.076
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发表时间：
2014-03-20
影响因子：
5.2
通讯作者：
Hu, Yong-You
中科院分区：
文献类型：
--
作者：
Guo, Yan-Ping;Hu, Yong-You
鼠李糖脂通常以同系物的多组分混合物的形式生产，在环境修复方面有很大的前景。由于不同的混合物表现出不同的表面活性和胶束化性质，这可能会影响它们的功能行为，因此每个鼠李糖脂同系物对增溶的单独贡献在很大程度上还没有被探索。本研究考察了两个独立的鼠李糖脂组分(RL-F1和RL-F2，分别为单和双鼠李糖脂)对中等疏水性17α-乙基雌二醇(EE2)的增溶作用。增溶实验结果表明，RL-F2对EE2的最大溶解能力高于RL-F1。然而，观察到RL-F1的传质速率较高。为了验证增溶实验的结果，进行了动态光散射、透射电子显微镜和紫外光谱分析。鼠李糖脂的类型和聚集体的形态对表面活性剂聚集体中的增溶物的掺入有很大的影响。本研究的结果可用于理解鼠李糖脂促进污染物在水环境中的传输，以及鼠李糖脂的选择，具有较高的实际应用特异性。(C)2014年爱思唯尔。版权所有。
Rhamnolipids are typically produced as multicomponent mixtures of homologues and are notably promising for environmental remediation. Because different mixtures exhibit dissimilar surface-active and micellization properties, which may affect their functional behaviors, the individual contribution of each rhamnolipidic homologue to the solubilization has largely been unexplored. In this study, enhanced solubilization of moderately hydrophobic 17 alpha-ethinylestradiol (EE2) by two independent rhamnolipidic fractions (i.e., RL-F1 and RL-F2, which are mono- and di-rhamnolipids, respectively) was investigated. The results of the solubilization experiments indicated that RL-F2 exhibited a higher maximum dissolving capability of EE2 compared to RL-Fl. However, a higher mass transfer rate was observed for RL-F1. To confirm the results of the solubilization experiments, dynamic light scattering, transmission electron microscopy, and UV-spectral analysis were performed. The type of rhamnolipid and the aggregate morphology strongly influenced the incorporation of solubilizate into the surfactant aggregates. The results of this study may be used to understand the rhamnolipid-facilitated transport of contaminants in aquatic environments, as well as the selection of rhamnolipids, with high specificity for practical applications. (c) 2014 Elsevier By. All rights reserved.