Synthesis and properties of imidazolium-based zwitterionic oligomeric silsesquioxane giant surfactants

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-10-03 DOI:10.1016/j.colsurfa.2025.138531

Wenhui Zhao , Yuqiao Cheng , Wenxiang Zhu , Zeyang Shan , Cheng Liang , Xinming Han , Huiwen Yan , Shihan Di

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引用次数: 0

Abstract

A series of zwitterionic oligomeric silsesquioxane giant surfactants (POSS-IMI-Cn, n = 6, 8, 10), featuring imidazolium and carboxylate groups, was synthesized. Their surface activity and aggregation behavior were investigated using surface tension, interfacial tension, electrical conductivity, dynamic light scattering, and transmission electron microscopy. The results showed that these giant surfactants exhibited lower critical aggregation concentrations compared to conventional zwitterionic surfactants. The incorporation of the rigid oligomeric silsesquioxane core into the surfactants resulted in a micellization process that was both spontaneous and enthalpy-driven, as confirmed by thermodynamic parameters, with vesicular aggregates observed via transmission electron microscopy. Additionally, the surface activity of POSS-IMI-Cn at the air-liquid interface varied with temperature and ionic strength, with the extent of these variations depending on the alkyl chain length. Finally, cytotoxicity evaluations revealed low toxicity for POSS-IMI-Cn, indicating their potential utility in colloidal and interfacial applications.

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咪唑基两性离子低聚硅氧烷巨型表面活性剂的合成与性能研究

合成了一系列以咪唑基和羧酸基为主要特征的两性离子低聚硅氧烷巨表面活性剂（POSS-IMI-Cn, n = 6,8,10）。利用表面张力、界面张力、电导率、动态光散射和透射电镜研究了它们的表面活性和聚集行为。结果表明，与传统的两性离子表面活性剂相比，这些巨型表面活性剂具有较低的临界聚集浓度。将刚性低聚硅氧烷核心加入到表面活性剂中，产生了自发和焓驱动的胶束过程，正如热力学参数所证实的那样，通过透射电子显微镜观察到泡状聚团。此外，POSS-IMI-Cn在气液界面的表面活性随温度和离子强度的变化而变化，这些变化的程度取决于烷基链的长度。最后，细胞毒性评价显示POSS-IMI-Cn的低毒性，表明其在胶体和界面应用中的潜在效用。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.