Aggregation behavior and intermolecular interaction of binary surfactant mixtures based on cationic Geminis and nonionic surfactants
Aggregation behavior and intermolecular interaction of binary surfactant mixtures based on cationic Geminis and nonionic surfactants
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基于阳离子Geminis和非离子表面活性剂的二元表面活性剂混合物的聚集行为和分子间相互作用
DOI：
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发表时间：
2015
影响因子：
2.4
通讯作者：
Mesut Boz
中科院分区：
文献类型：
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作者：
H. Akbaş;Sinem Kasapoğlu;Mesut Boz
本文在实验室合成、纯化和表征了不同烷基基含m个碳原子和乙二基间隔的双溴二烷基二基-α-ω-双（烷基二甲基铵）Gemini型表面活性剂，简称“m-2-m”[CmH2m + 1(CH2) 2n +(CH2) 2n +(CH2)2 CmH2m + 1,2br−]（m = 12和16）。采用电导率和稳态荧光猝灭技术，研究了阳离子gemini与非离子表面活性剂聚氧乙烯（23）十二烷基醚（Brij35）和聚氧乙烯辛基苯基醚（TX-100）在一定胶束浓度范围和一定温度下的相互作用。采用Rubingh理论计算了混合体系的胶束相互作用参数（β）。观察到，由于β值为正，所有二元混合物的混合胶束形成均表现为负增效（拮抗）或理想行为。据观察，传统表面活性剂的贡献总是大于双子座的贡献。利用峰值强度之比，得到了混合体系的微极性、介电常数(D)和结合常数（Ksv）。
The Gemini surfactants of type alkylediyl-α-ω-bis(alkyldimethylammonium) dibromide with different alkyl groups containing m carbon atoms and an ethanediyl spacer, referred as “m-2-m” [CmH2m + 1(CH2)2 N+(CH2)2 N+(CH2)2 CmH2m + 1, 2Br−] (m = 12 and 16), have been synthesized, purified, and characterized in our laboratory. The interactions between cationic Geminis and nonionic surfactants polyoxyethylene (23) lauryl ether (Brij35) and polyoxyethyleneoctyl phenyl ether (TX-100) have been studied by conductivity and steady-state fluorescence quenching techniques at a certain micellar concentration range and certain temperature. Rubingh’s theory is used to evaluate the micellar interaction parameters (β) for the mixed systems. It has been observed that mixed micelle formation in all the binary mixtures exhibited negative synergism (antagonism) or ideal behavior due to positive β values. It was observed that contribution of conventional surfactants was always more than that of the Geminis. By using the ratio of peak intensities, micro-polarity, dielectric constant (D), and binding constant (Ksv) of mixed systems have been found.