阴离子双子表面活性剂／Bola 盐体系中蠕虫胶束的形成与性质

摘要

研究了一种羧酸盐双子表面活性剂C12φ2 C12与一类Bola盐混合体系的流变行为。在Bola盐的作用下， C12φ2 C12在较低浓度下即可生成蠕虫胶束。随着Bola盐比例的增大，蠕虫胶束快速生长，体系粘度显著提升。在较高的Bola盐浓度下，溶液中的胶束产生分枝，引起体系粘度的下降。随着联接链长度的增加， Bola盐的头基电荷密度减小，对蠕虫胶束生长的促进作用减弱。%Mixed systems composed by a carboxylate Gemini surfactant ( C12φ2 C12 ) and Bola salts were investigated by rheological measurements.C12φ2 C12 formed wormlike micelles at low concentrations with the assistance of Bola salts.With an increase of mole fraction of Bola salt, the fast growth of wormlike micelle was observed which resulted in a viscosity solution.At relatively high Bola salt concentration, micelle branching happened in the surfactant solutions, which caused the viscosity decrease of systems.With increasing the spacer length, the head group electric density of the Bola salts was decreased.The effect on promoting the growth of wormlike micelles was weakened.