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以一元羧酸(乙酸、正丁酸、正己酸、正辛酸)为助表面活性剂,通过相图绘制来考察正丁酸含量和一元羧酸链长对离子液体1-丁基-3-甲基咪唑六氟磷酸盐(bmim PF_6)、甲苯、吐温80(Tween80)组成的三元体系的单相微乳区的影响,并用电导率法研究正丁酸存在下该体系单相微乳区的微结构。结果表明,随着正丁酸与吐温80质量比增加,单相微乳区面积逐渐减小;不同碳链长的一元羧酸对单相微乳区面积的影响与该酸分子在离子液体和油两相分配情况以及其亲脂性有关,随着一元羧酸链长增大,单相微乳区面积减小。电导测定结果显示,单相微乳区存在O/IL(离子液体包油)、BC(双连续)、IL/O(油包离子液体)3种微结构。动态光散射测定结果显示,最初IL/O微乳液滴粒径随着bmim PF_6增加而呈直线增大,连续加入bmim PF_6后,IL/O微乳液滴出现偏离直线的较大粒径。
Using monocarboxylic acid (acetic acid, n-butyric acid, n-caproic acid, n-octanoic acid) as cosurfactant, the content of n-butyric acid and the chain length of monocarboxylic acid were investigated by phase- The effects of bmim PF_6, toluene and Tween80 on the single-phase microemulsion of ternary system were studied. The single-phase microemulsion Microstructure. The results showed that with the increase of mass ratio of n-butyric acid to Tween 80, the area of single-phase microemulsion decreased gradually. The influence of monocarboxylic acids with different carbon chain length on the area of single- And oil phase distribution and lipophilicity, with the monocarboxylic acid chain length increases, the single-phase micro-emulsion area decreases. Conductivity measurement showed that there were three microstructures of O / IL (ionic liquid oil inclusion), BC (bicontinuous) and IL / O (oleaginous ionic liquid) in single phase microemulsion. The results of dynamic light scattering showed that the particle size of the first IL / O microemulsion increased linearly with the increase of bmim PF_6. After continuous addition of bmim PF_6, the droplets of IL / O microemulsion showed a large deviation from the straight line.