摘要
用耗散颗粒动力学模拟方法(Dissipative Particle Dynamics,DPD)研究了油分子量、油分子浓度、剪切及表面活性剂SDS(十二烷基硫酸钠)对油水体系相行为的影响.发现随着油分子量的增加,油水界面张力增加;随着油浓度的增加,体系由最初的水包油聚集状态逐渐演变为油水分层状态.随着剪切速率的加大,油滴被逐渐拉长,最后断裂;表面活性剂加入油水体系后,以亲水头基伸入水相、疏水尾巴伸入油相的方式分布在油水界面上.
In this paper,Dissipative particle dynamics simulation is used to study the effect of the molecular weight and concentration of oil,shear and addition of SDS on the phase behavior of oil/water system.The interfacial tension of the system increases with the oil molecular weight increasing.Spherical,wormlike and lamellar aggregates formed by oil molecules can be found in water with the oil concentration increasing.Spherical aggregates become longer with shear rate increasing and break down under certain shear rate.The hydrophilic group of the SDS locate in water while hydrophobic group of SDS locate in oil phase in the system.
出处
《山东教育学院学报》
2010年第6期29-32,共4页
Journal of Shandong Education Institute
基金
胜利油田横向项目:表面活性剂溶液界面聚集特征研究
