不同体系中油酸甲酯与烷基苯磺酸盐协同效应研究

研究了表面活性剂/盐/模拟油体系与表面活性剂/碱/模拟油体系中油酸甲酯与表面活性剂协同效应机理.结果表明两种体系中协同效应机理不同.在盐体系中,油酸甲酯主要通过改变油相的等效烷烃碳数(EACN) 影响表面活性剂在油水相分配.而碱体系中,油酸甲酯影响表面活性剂在油水相分配从而影响界面张力；另一方面,油酸甲酯吸附在界面上顶替表面活性剂分子影响界面张力.对于不同结构表面活性剂,两种作用竞争的结果不同.

Studies of Synergism between Sodium Alkyl Benzene Sulfonate and Methyl Oleate in Different Systems

The mechanisms responsible for synergism between alkyl benzene sulfonate and methyl oleate in surfactant/brine/model oil and surfactant/alkali/model oil systems were studied. The results show that different mechanisms exist in above two systems. To the former, methyl oleate mainly influences the partition of surfactants in oil phase and aqueous phase by changing EACN value of oil phase. To the latter, the role of methyl oleate in influencing the partition of surfactant in oil phase and aqueous phase competes with its adsorption role at the interface. In this experimental condition, the result of competition between above two roles is different for surfactant with different structure.