Role of Solubilized Water in Micelles Formed by Triton X-100 in 1-Butyl-3-methylimidazolium Ionic Liquids

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• 作者：Na Li ; Shaohua Zhang ; Hongchao Ma ; Liqiang Zheng
• 刊名：Langmuir
• 出版年：2010
• 出版时间：June 15, 2010
• 年：2010
• 卷：26
• 期：12
• 页码：9315-9320
• 全文大小：861K
• 年卷期：v.26,no.12(June 15, 2010)
• ISSN：1520-5827

文摘

We demonstrate here the aggregation behavior of a nonionic surfactant Triton X-100 in two 1-butyl-3-methylimidazolium ionic liquids (the hydrophilic IL [bmim][BF₄] and the hydrophobic IL [bmim][PF₆]) by surface tension measurements. The effects of added water on the microstructure of Triton X-100 in ILs micelles are investigated. When small amounts of water are added to Triton X-100 in [bmim][PF₆] micelles, the water molecules are first bound to the ethylene oxide (EO) units of Triton X-100 and then form the water pool in the core of the microemulsion. When water molecules are added to the Triton X-100 in [bmim][BF₄] micelles, there is no microemulsion formed; these water molecules are first solubilized in [bmim][BF₄]. When the solubilization is saturated, the water molecules start to bind to the EO group of Triton X-100; these results are confirmed by UV−vis, FTIR, and ¹H NMR spectra.