双子表面活性剂疏水链对油水界面行为的影响  

The effect of gemini surfactant hydrophobic chain on the behavior of oil water interface

作　　者：朱品泓 马秀君 刘巍洋 王玲玲 丁伟[1] ZHU Pinhong;MA Xiujun;LIU Weiyang;WANG Lingling;DING Wei(Heilongjiang Provincial Key Chemical Industry Laboratory of Petroleum and Natural Gas,College of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang China)

机构地区：[1]东北石油大学石油工程学院、石油与天然气省化工重点实验室,黑龙江大庆163318

出　　处：《粘接》2024年第2期65-68,共4页Adhesion

基　　金：东北石油大学科技成果产业化培育基金(项目编号:15011210802)。

摘　　要：双子表面活性剂(Gemini surfactants)已经被认为是传统的单子表面活性剂的新型替代品。然而,双子表面活性剂对油水界面影响的微观机制还没有被充分理解,通过构建了具有不同疏水链长度的双子表面活性剂并利用耗散粒子动力学(DPD)模拟研究了双子表面活性剂对油水界面行为的影响,研究结果表明,双子表面活性剂的表面活性随着疏水链长度的增加而增加,这也促使油水界面从层状转变为乳状液滴形态。温度的上升有利于降低油水界面张力使混合体系转变为乳液状态。表面活性剂疏水尾链和油珠之间的相互作用随着疏水尾链长度的增加而增加。Gemini surfactants are regarded as novel alternatives to traditional mono surfactants.However,the microscopic mechanism of the effect of gemini surfactants on the oil-water interface is not fully understood.Gemini surfactants with different hydrophobic chain lengths were constructed and the effect of surfactants on the oil-water interface was investigated using dissipative particle dynamics(DPD)simulations.The results showed that gemini surfactants with longer hydrophobic chains had higher surface activity,promoting the transformation of the oil-water interface from layered to emulsion-like droplet morphology.The increase of temperature was conducive to reducing the oil-water interfacial tension and transforming the mixed system into an emulsion state.The interaction between the hydrophobic tail chain of the surfactant and the oil beads increased with the increase of the hydrophobic tail chain length.

关 键 词：双子表面活性剂 油水界面 耗散动力学 疏水链 

分 类 号：TQ013[化学工程]