中文摘要：

研究水/表面活性剂/超临界CO2（ScCO2）的结构自组装对于设计和应用基于ScCO2流体的反胶束微乳化过程有着重要的理论指导意义。文中采用耗散粒子动力学（DPD）模拟方法,对双链离子型表面活性剂[琥珀酸酯磺酸钠（d i-HCF4）]＋水＋CO2（溶剂）体系进行介观模拟。模拟观测了在ScCO2中表面活性剂不同组成下的聚集形态,以及反相微乳结构形成的动态过程,同时考察了微乳体系的相形态与温度和压力的关系。模拟结果表明：温度升高,有利于反相微乳结构的形成;压力升高,会破坏反相微乳结构。

英文摘要：

The study of self-assembly structure of water/surfactant/supercritical CO2（ScCO2） is very central to the design and application of the ScCO2-based reverse micelle microemulsion process.The dissipative particle dynamics（DPD） mescscopic simulation was performed to study the system of dichain surfactant（di-HCF4）＋water＋ScCO2.The aggregation morphology under various concentrations of surfactant and the dynamic self-assembly process were observed.The effect of temperature and pressure on the structure of self-assembly was investigated.According to the simulation result,increasing temperature is beneficial to the reversed microemulsion formation,whereas increasing pressure can damage the reverse micelle structure.