表面活性剂分支结构对O/W型微乳液影响的介观模拟研究  

Effect of surfactant chain branch on the formation of O/W microemulsion system by mesoscopic simulation

作　　者：张海霞[1] 

机构地区：[1]滨州学院化学工程系,山东滨州256603

出　　处：《化学研究与应用》2017年第1期32-36,共5页Chemical Research and Application

基　　金：滨州学院科研基金项目(BZXYG1617)资助

摘　　要：采用耗散颗粒动力学模拟方法从介观水平上研究了表面活性剂分支结构对O/W型微乳液形成的影响。研究结果表明:对于不同链分支结构的表面活性剂/油/水体系在一定的油水比和表面活性剂浓度下可以形成O/W型微乳液,此时体系的平均界面张力值最低。当表面活性剂浓度相同时,随着油水比的降低,直链表面活性剂H2T2最利于O/W型微乳液的形成;而在油水比相同时,随着表面活性剂浓度的增加,直链表面活性剂H2T2在较大浓度范围内依然为稳定的微乳液。也就是说直链表面活性剂最利于O/W型微乳液的形成。此模拟结果从介观水平上提供了表面活性剂分支结构对O/W型微乳液形成的影响,为微乳液的实际应用提供理论指导。Dissipative particle dynamics（ DPD） simulation was performed to study the effect of the surfactant chain branch on the formation of the O / W microemulsion system on mesoscopic level. The results showed that the surfactant / oil / water systems could form oil-in-water microemulsion in a certain oil / water ratio and surfactant concentration,also had the lowest interfacial tension.The linear surfactant H2T2 was most conducive to the formation with the decrease of oil / water ratio at the same surfactant concentration.Meanwhile,H2T2 was still stable microemulsion in the largest concentration range with surfactant concentration increasing at the same oil / water ratio.That was to say,straight chain surfactant was the most conducive to the formation of O / W microemulsion. The simulation results provided the effect of the surfactant chain branch on the microemulsion systems from the mesoscopic scale,and supplied theoretical guidance for the practical application of the microemulsion.

关 键 词：耗散颗粒动力学模拟 微乳液 末端距 界面张力 

分 类 号：O647[理学—物理化学]