title: Microregion detection of ionic liquid microemulsions.
abstract: Nonaqueous ionic liquid (IL) microemulsion consisting of IL, 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF(4)), surfactant TX-100, and toluene was prepared and the phase behavior of the ternary system was investigated. Electrical conductivity measurement was used for investigating the microregions of the nonaqueous IL microemulsions. On the basis of the percolation theory, the bmimBF(4)-in-toluene (IL/O), bicontinuous, and toluene-in-bmimBF(4) (O/IL) microregions of the microemulsions were successfully identified using insulative toluene as the titration phase. However, this method was invalid when conductive bmimBF(4) acted as the titration phase. The microregions obtained by conductivity measurements were further proved by electrochemical cyclic voltammetry experiments. The results indicated that the conductivity method was feasible for identifying microstructures of the nonaqueous IL microemulsions.
authors.affiliation: Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100, China.
authors.forename: Yanan
authors.initials: Y
authors.lastname: Gao
authors.forename: Suqing
authors.initials: S
authors.lastname: Wang
authors.forename: Liqiang
authors.initials: L
authors.lastname: Zheng
authors.forename: Shuaibing
authors.initials: S
authors.lastname: Han
authors.forename: Xuan
authors.initials: X
authors.lastname: Zhang
authors.forename: Deming
authors.initials: D
authors.lastname: Lu
authors.forename: Li
authors.initials: L
authors.lastname: Yu
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Ji
authors.forename: Gaoyong
authors.initials: G
authors.lastname: Zhang