Spontaneous Vesicle Formation in Aqueous Solutions of Linear Alkylbenzenesulfonate and a Linear Alkylbenzenesulfonate/Nonionic Surfactant Mixture upon Addition of Divalent Ions
Spontaneous vesicle formation is found in 1% aqueous solutions of linear alkylbenzenesulfonate (LAS) and mixtures of LAS and the nonionic surfactant, Cn-(N-methyl)glucose amide (MEGA), upon addition of a mixture of Ca2+/Mg2+ (2:1 molar ratio). Cryo-transmission electron microscopy (cryo-TEM) has been used to image the colloidal structures. A spherical micelle-to-vesicle transition occurs with increasing divalent ion concentration. However, thread-like micelles are absent from this transition. Many of the vesicles are exceptionally small, having a diameter less than 25 nm.
Lin
Z
Miami Valley Laboratories, The Procter & Gamble Company, Cincinnati, Ohio, 45253-8707
Fu
YC