一种测定表面活性剂在油相中扩散系数的新方法

A new method for measuring the diffusion coefficient of surfactants in oil phase

利用数值分析和化学分析的方法,提出了一种研究表面活性剂在油相中扩散系数的新方法,以重烷基苯磺酸钠为例研究了其在油相中的扩散规律以及聚合物对其扩散系数的影响。求得了重烷基苯磺酸钠在油相中的扩散系数;聚合物存在时,表面活性剂的扩散系数略小于单独表面活性剂,聚合物一定程度上阻碍表面活性剂向油相中的扩散。进一步预测了阴离子表面活性剂在油水两相的分配系数,结果表明,预测值和实验值吻合较好,阴离子表面活性剂在油相中扩散规律的新方法是可靠的,具有实用性。

A new method of studying on the diffusion coefficient of the surfactant in oil phase is put forward by using numerical and chemical analysis.Taking sodium heavy alkyl benzene sulfonate for an example,the diffusion rule in oil phase and the effect of polymers on the diffusion coefficient were studied and the diffusion coefficient of sodium heavy alkyl benzene sulfonate in oil phase was obtained.With polymers,the diffusion coefficient is slightly less than that of pure surfactant and the polymers refrain the diffusion of surfactant from oil phase tOsome extent.Furthermore,the partition coefficient of anionic surfactant in oil-water twOphase were further predicted and the results show that the predicted value agrees well with the experimental value.Therefore,the new method of studying on the diffusion rule of anionic surfactant in oil phase is reliable and practical.