Yongqiang Sun, Kehua Zhu, Jingjie Zhou, Yong Zhang, Martino Di Serio, Xiaoyi Yang & Yunling Li
The aggregation behavior of a novel carboxylate surfactant, sodium ricinate branched polyoxyethylene ether, was studied by dynamic light scattering (DLS), ultraviolet visible spectrophotometer,
and transmission electron microscope (TEM) measurements. Concentration induced micelle to vesicle transitions were observed when the concentration of the surfactant solution was higher than 0.1mmol/L. And the size of the vesicles decreased with increase of the concentration of surfactant.
We performed a detailed study on this interesting phenomenon and proposed a possible mechanism: intermolecular hydrogen bonds of branched polyoxyethylene ether in the molecule may be the reasons that lead to the formation of vesicles in aqueous solutions of sodium ricinate branched polyoxyethylene ether.