Investigating oil solubilization into nonionic micelles by Raman multivariate curve resolution: Special Collection: Aggregation‐Induced Processes and Functions
Investigating oil solubilization into nonionic micelles by Raman multivariate curve resolution: Special Collection: Aggregation‐Induced Processes and Functions
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通过拉曼多元曲线分辨率研究油溶解到非离子胶束中：特别收藏：聚集 - 诱导过程和功能
DOI：
10.1002/agt2.385
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发表时间：
2023
期刊：
影响因子：
18.8
通讯作者：
Zarzar, Lauren D.
中科院分区：
文献类型：
--
作者：
Wentworth, Ciera M.;Myers, Ryan L.;Cremer, Paul S.;Zarzar, Lauren D.
疏水水化是水自发地围绕疏水性和两亲性分子形成的过程，在表面活性剂胶束形成和胶束油增溶过程中起着关键作用。使用振动拉曼多变量曲线分辨率光谱，我们表征了非离子烷基酚聚氧乙烯醚表面活性剂Tergitol NP-12胶束内发生的疏水水合作用的变化，作为油增溶的函数。我们报告的趋势取决于油的链长，以及在油的化学结构中的卤素原子的存在下，疏水性水合的变化。疏水水化的变化与胶束溶液的物理性质的变化直接相关，包括浊点和胶束流体动力学直径。我们比较了Tergitol NP-12与非离子型线性烷基乙氧基化物表面活性剂Makon TD-12和离子型十二烷基硫酸钠的疏水水合作用，并观察到类似的趋势;油的分子结构对疏水水合作用的影响最大。我们相信这些研究有助于从根本上理解表面活性剂和油聚集体中疏水水化的重要性，特别是当它涉及胶束油增溶时，并提供对分子增溶物如何影响胶束结构，大小和稳定性的见解。
Hydrophobic hydration, whereby water spontaneously structures around hydrophobic and amphiphilic molecules, plays a key role in the process of surfactant micelle formation and micellar oil solubilization. Using vibrational Raman multivariate curve resolution spectroscopy, we characterized changes in the hydrophobic hydration occurring within nonionic alkylphenol ethoxylate surfactant Tergitol NP‐12 micelles as a function of oil solubilization. We report trends in the changes of hydrophobic hydration depending on the chain length of the oil as well as the presence of a halogen atom in the oil chemical structure. Changes in hydrophobic hydration directly correlate to changes in the physical properties of the micellar solution, including cloud point and micelle hydrodynamic diameter. We compare hydrophobic hydration of Tergitol NP‐12 to nonionic linear alkyl ethoxylate surfactant Makon TD‐12 and ionic sodium dodecyl sulfate and observe similar trends; the molecular structure of the oil has the largest impact on the hydrophobic hydration. We believe these studies contribute to a fundamental understanding of the importance of hydrophobic hydration in surfactant and oil aggregates, especially as it relates to micellar oil solubilization, and provide insight into how the molecular solubilizate can impact micellar structure, size, and stability.