摘要
本文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W/O型微乳液形成的影响。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W/O型微乳液,此时体系的平均界面张力值最低。但在表面活性剂浓度相同时,随着油水比的增加,直链表面活性剂H2T2最利于其形成;而在油水比相同条件下,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W/O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W/O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 W/O microemulsion system on？ mesoscopic？ level.The results show that the surfactant/oil/water systems can form water-in-oil microemulsion in a certain oil/water ratio and surfactant concentration,which has the lowest interfacial tension.The linear surfactant H2T2 is the most conducive to the formation with the increase of oil/water ratio at the same surfactant concentration.Meanwhile,H2T2 is still stable microemulsion in a vast concentration range with increasing surfactant concentration while maintaining the same oil/water ratio.That is to say,straight chain surfactant is the most conducive to the formation of W/O microemulsion.The simulation results provide the effect of the surfactant chain branch on the microemulsion systems from the mesoscopic scale,and supply theoretical guidance for the practical application of the microemulsion.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2016年第1期71-75,共5页
Chemical Research and Application
基金
山东省自然科学基金项目(ZR2014BL014)
滨州学院青年人才创新基金(BZXYQNLG201203)资助
关键词
耗散颗粒动力学模拟
微乳液
末端距
界面张力
dissipative particle dynamics（DPD） simulation
microemulsion
end to end distance
interfacial tension
