Hu Yimin, Chen Yu, Cai Zixian, Jin Xiaolan, Fan Lei, Han Jie, Guo Rong
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, P. R. China.
Langmuir. 2022 Mar 15;38(10):3051-3063. doi: 10.1021/acs.langmuir.1c02602. Epub 2022 Feb 28.
The effect of the hydrocarbon chain length of ionic liquid surfactants 1-hexadecyl-3-alkyl imidazolium bromide [CimC]Br ( = 1-16) on their aggregation behavior with polyoxyethylene lauryl ether (Brij 30) in aqueous solution was inspected. The rheological behavior, thermal properties, and microstructures of the different samples were studied using freeze-fractured electron microscopy. The interactions between [CimC]Br and Brij 30 were studied using nuclear magnetic resonance spectroscopy and theoretical simulation. With the addition of Brij 30, the rodlike micelles of [CimC]Br ( = 1, 2, 4, and 6) transition into wormlike micelles. The effects of the molar ratio of Brij 30 and [CimC]Br and the hydrocarbon chain length of [CimC]Br on the Brij 30/[CimC]Br ( = 1, 2, 4, and 6) wormlike micelles were studied. When Brij 30 was mixed with the rodlike micelles of [CimC]Br, the Brij 30/[CimC]Br mixtures form wormlike micelles at low Brij 30 concentration and gels at high Brij 30 concentration. The [CimC]Br ( = 10, 12, 14, and 16) rodlike micelles were induced by Brij 30 to turn into the Brij 30/[CimC]Br gels. The effect of the [CimC]Br hydrocarbon chain length on their rodlike micelles with the addition of Brij 30 is also theoretically discussed.
考察了离子液体表面活性剂1-十六烷基-3-烷基咪唑溴化物[CimC]Br（=1-16）的碳氢链长度对其与聚氧乙烯月桂醚（Brij 30）在水溶液中聚集行为的影响。使用冷冻断裂电子显微镜研究了不同样品的流变行为、热性质和微观结构。使用核磁共振光谱和理论模拟研究了[CimC]Br与Brij 30之间的相互作用。随着Brij 30的加入，[CimC]Br（=1、2、4和6）的棒状胶束转变为蠕虫状胶束。研究了Brij 30与[CimC]Br的摩尔比以及[CimC]Br的碳氢链长度对Brij 30/[CimC]Br（=1、2、4和6）蠕虫状胶束的影响。当Brij 30与[CimC]Br的棒状胶束混合时，Brij 30/[CimC]Br混合物在低Brij 30浓度下形成蠕虫状胶束，在高Brij 30浓度下形成凝胶。Brij 30诱导[CimC]Br（=10、12、14和16）的棒状胶束转变为Brij 30/[CimC]Br凝胶。还从理论上讨论了[CimC]Br碳氢链长度对其加入Brij 30后的棒状胶束的影响。
