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利用耗散粒子动力学(DPD)方法对吐温80/正构醇(C2~C8)/丁酸乙酯/水四组分微乳体系形成过程进行了模拟,研究了醇类浓度及烃链长度对微乳形成过程相行为及微观结构的影响。研究发现:正构醇浓度和烷烃链长度对体系自组装形态变化有显著影响,当醇类浓度较低时,微乳粒径随醇浓度的增大而增大,当浓度增加到一定程度后,继续增加醇浓度则导致微乳形态从球状依次变为管道状、网格状;通过比较不同烷烃链长的微乳体系发生形态变化时醇的浓度大小,发现醇烷烃链长的增加促使微乳体系在醇浓度较低时就发生形态转变,且体系界面张力较快趋于稳定。同时,研究发现醇链长的增加会使吐温80/正构醇/丁酸乙酯/水体系的W/O型和双连续型微乳区增大。该结果为微乳类型及形态尺寸的调控从而实现蛋白质的选择性萃取提供指导。
The formation of four-component microemulsion system of Tween 80 / n-alkanol (C2 ~ C8) / ethyl butyrate / water was simulated by dissipative particle dynamics (DPD) Effect of Length on Phase Behavior and Microstructure of Microemulsion Formation. The results showed that the concentration of n-alkanol and alkane chain length had a significant influence on the self-assembly morphology of the system. When the alcohol concentration was low, the diameter of the microemulsion increased with the increase of the alcohol concentration. When the concentration increased to a certain extent , Continue to increase the concentration of alcohol resulted in micro-emulsion morphology from spherical to pipe-like, mesh; by comparing different alkane chain length microemulsion system morphology changes in the concentration of alcohol concentration and found that the increase of alcohol alkane chain length to promote micro Milky system occurs when the alcohol concentration is low, and the interfacial tension tends to be stable. At the same time, it was found that the increase of alcohol chain length increased W / O and bicontinuous microemulsion of Tween 80 / n-alkanol / ethyl butyrate / water system. The results provide guidance for the regulation of microemulsion types and morphological size in order to achieve selective protein extraction.