Spontaneous Vesicle Formation in Mixtures of Quaternary Ammonium Compounds with Carbamate and Sodium Dodecylbenzene Sulfonate

摘要

Spontaneous vesicles formation in the aqueous mixtures of 2,3-bis (dodecylcarbamoyloxy)-N, N-dimethyl-N-(2-hydroxyalkyl) propyl ammonium chloride (C(12)PAC) and sodium dodecylbenzene sulfonate at different mixing molar ratios have been investigated. The characterizations are demonstrated by electrical conductivity measurements, dynamic light scattering and zeta (zeta) potential measurements. The zeta-potential results indicate the C(12)PAC/SDBS systems are stable. The shapes of the catanionic vesicles are observed by negative-staining transmission electronic microscopy. Meanwhile, from the viewpoint of molecular geometry structure, the electrostatic interaction between anionic and cationic molecules is regarded as the main driving force for spontaneous formation of vesicles.