Improved solubilities of PAHs by multi-component Gemini surfactant systems with different spacer lengths
Improved solubilities of PAHs by multi-component Gemini surfactant systems with different spacer lengths
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通过具有不同间隔长度的多组分 Gemini 表面活性剂体系提高 PAH 的溶解度
DOI：
10.1016/j.colsurfa.2013.01.049
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发表时间：
2013-04
期刊：
影响因子：
--
通讯作者：
Yao Yao
中科院分区：
文献类型：
--
作者：
Guohe Huang;Shuo Wang;Shan Zhao;Yao Yao
研究了一系列单阳离子Gemini表面活性剂（烷二基-α，ω-双（十二烷基二甲基溴化铵））及其等摩尔双、三元组合的混合胶束、界面和增溶作用。为了找出混合表面活性剂体系的协同效应，采用了几种理论处理方法对相互作用参数、反离子结合、表面过剩、胶束自由能等进行了评价和比较。发现非理想性随着组分间隔长度差异的增大而增大。本文从摩尔增溶比、胶束-水分配系数、偏差比和自由增溶能等方面评价了单、等摩尔双、三元Gemini表面活性剂体系对多环芳烃、萘和芘的增溶效果。所选择的单一和混合Gemini表面活性剂体系的隔离层长度对其对多环芳烃的增溶能力、胶束和界面行为有不同的影响。结果表明，增溶能力不仅取决于表面活性剂的胶束和界面性质，还与溶质的亲疏水性质有关。对具有相同电荷的二元和三元Gemini表面活性剂组合的此类研究是有限的。
Mixed micellization, interface and enhanced solubilization aspects of a series of single cationic Gemini surfactants (alkanediyl-α,ω-bis (dodecyldimethylammonium bromide) as well as their equimolar bi and ternary combinations have been investigated. Several theoretical treatments have been employed to evaluate and compare the mutual interaction parameter, counterion binding, surface excess, free energies of micellization, etc. for finding out synergistic effect of mixed surfactant systems. Nonideality is found to increase with the enlarged difference of spacer length of components in mixtures. Water solubility enhancement of polycyclic aromatic hydrocarbons (PAHs), naphthalene and pyrene, by selected single, equimolar bi and ternary Gemini surfactant systems, has been evaluated from measurements of the molar solubilization ratio, the micelle–water partition coefficient, the deviation ratio and the free energy of solubilization. The spacer length of selected single and mixed Gemini surfactant systems has a different effect on their solubilization capabilities towards PAHs relative to micellar and interfacial behaviors. The results have shown that the solubilization power not only depends on the micellar and interfacial properties of surfactant but also has an association with hydrophilic/hydrophobic properties of solutes. Such studies on binary and ternary Gemini surfactant combinations with the same charge are limited.
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