反相破乳剂SP169及DMEA169在溶液中的聚集行为

发布时间：2018-03-16 17:48

本文选题：反相破乳剂　切入点：聚集行为　出处：《物理化学学报》2016年06期 　论文类型：期刊论文

【摘要】：以芘(Py)为荧光探针,十六烷基氯化吡啶(CPC)为猝灭剂,采用稳态荧光探针法测定了反相破乳剂SP169和DMEA169的临界胶束浓度(cmc)及胶束聚集数(N_(agg)),并考察了两者在溶液中形成的胶束内部的微环境极性大小,采用动态光散射法测定了两者胶束的流体力学直径(Dh),并通过耗散粒子动力学(DPD)方法模拟了两者在溶液中聚集形态的动力学变化过程。结果表明,两者的临界胶束聚集数分别为N_(m(SP169))=28,N_(m(DMEA169))=18;SP169的流体力学直径小于DMEA169,但其增长速度前者大于后者;DPD模拟的结果显示,由于起始剂在胶束内部与其他粒子间相互作用的不同,SP169聚集成棒状胶束,而DMEA169聚集成舒展的球状胶束,这解释了实验结果:相同浓度下前者胶束的流体力学直径及胶束内部的微环境极性皆比后者小,同时由于SP169起始剂的疏水性,使得其具有较大的胶束聚集数。
[Abstract]:Pyrene pyrite was used as fluorescence probe and cetylpyridine chloride (CPC) as quenching agent. The critical micelle concentration of reverse demulsifier SP169 and DMEA169 and the number of micelle aggregation were determined by the steady-state fluorescence probe method. The microenvironmental polarity of the micelles formed in solution was also investigated. The hydrodynamic diameters of the two micelles were measured by dynamic light scattering method, and the kinetic process of the aggregation morphology of the two micelles in solution was simulated by the dissipative particle dynamics (DPD) method. The critical micelle aggregation numbers of the two are as follows: the hydrodynamic diameter of DMEA169 is smaller than that of DMEA169, but the growth rate of SP169 is higher than that of DMEA169. the results of DPD simulation show that due to the different interaction between the initiator and other particles, a bar micelle is formed. The results of the experiment show that the hydrodynamic diameters of the former micelles and the microenvironmental polarity of the micelles in the same concentration are smaller than those of the latter, and that the hydrophobicity of the SP169 initiators is the same as the hydrophobicity of the SP169 initiators. So that it has a large number of micelle aggregation.
【作者单位】：西南石油大学"油气田应用化学"四川省重点实验室;
【基金】：国家自然科学基金(21376193) 教育部新世纪优秀人才支持计划(NCET-13-0983) 四川省青年科技创新研究团队专项计划(2015TD0007)资助项目~~
【分类号】：O657.3

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