Coexistence of Liquid and Solid Phases of Bmim-PF<sub>6</sub> Ionic Liquid on Mica Surfaces at Room Temperature

Liu, Yaodong; Zeng, Yi; Wang, Guozhong; Hu, Jun

doi:10.1021/ja062685u

Cited by 151 publications

(194 citation statements)

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“…Repulsive force derived from steric hindrance or solvation force makes silica nanoparticles disperse in [C 4 mim][BF 4 ], which has proposed by Ueno et al (2009). The repulsive solvation force for ILs-silica system has been detected by surface force measurement and directly confirmed by atomic force microscopy (Liu et al 2006;Atkin and Warr 2007). The shear thickening behavior is similar with hydrophilic silica dispersed in PEG (Mw = 400) as reported by Raghavan and Khan 1997.…”

Section: Resultsmentioning

confidence: 64%

Study of a shear thickening fluid: the dispersions of silica nanoparticles in 1-butyl-3-methylimidazolium tetrafluoroborate

et al. 2015

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The dispersions was prepared by dispersing hydrophilic silica nanoparticles with an average diameter of 50 nm in 1-butyl-methylimidazolium tetrafluoroborate ([C 4 mim][BF 4 ]), and investigated under the steady shear and oscillatory shear, respectively. Experimental results indicate that all of the dispersions present shear thinning, notable shear thickening, and shear thinning successively with increasing shear rate; the shear thickening behavior is derived from silica nanoparticle clusters and strongly controlled by silica nanoparticle content and temperature. The shear thickening fluid (STF) exhibits reversible property and transient response ability, and the time of transient response is no more than 100 ms. The conductivity of the STF is increased with increasing silica nanoparticle content, and the conductivity of 27 wt% dispersions is even two times as big as that of pure [C 4 mim] [BF 4 ]. The dispersions with high solid content dilate and present a phase transition changing from a liquid-like to a solid-like soft material in the shear thickening region. A theoretical model is developed to imitate the mechanism of shear thickening in the dispersions.

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Section: Resultsmentioning

confidence: 64%

Study of a shear thickening fluid: the dispersions of silica nanoparticles in 1-butyl-3-methylimidazolium tetrafluoroborate

et al. 2015

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“…Charge/voltage driven structural transitions in the electrical double layer (EDL) in ionic liquids (ILs) have recently attracted large interest in experimental [1,2,3,4,5,6], theoretical [7] and computational [8,9,10,11,12,13,14] communities due to the importance of this subject for a variety of IL applications [15,16].…”

Section: Introductionmentioning

confidence: 99%

Poly(a)morphic portrait of the electrical double layer in ionic liquids

Ivaništšev

OʼConnor

Fedorov

2014

Electrochemistry Communications

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“…Recently, various spectroscopic measures (NMR, IR, Raman, etc.) were utilized to characterize the properties of RTILs [7][8][9]. Pulse radiolysis and time-resolved fluorescence [10][11][12][13][14][15][16] have also been applied to study the reaction processes occurring in RTILs.…”

Section: Introductionmentioning

confidence: 99%

Laser photolysis study of anthraquinone in binary mixtures ofionic liquid [bmim][PF6] and organic solvent

Zhu

et al. 2006

IJMS

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Photochemical properties of the ionic liquid (RTIL) 1-butyl-3-methylimidazolium hexafluorophosphate [bmim] [PF 6 ] and its binary mixed solutions with organic solvent (DMF and MeCN) were investigated by laser photolysis at an excitation wavelength of 355 nm, using anthraquinone (AQ) as a probe molecule. It was indicated that the triplet excited state of AQ ( 3 AQ*) can abstract hydrogen from [bmim] [PF 6 ]. Moreover, along with the change of the ratio of RTIL and organic solvent, the reaction rate constant changes regularly. Critical points were observed at volume fraction V RTIL = 0.2 for RTIL/MeCN and V RTIL = 0.05 for RTIL/DMF. For both systems, before the critical point, the rate constant increases rapidly with increasing V RTIL ; however, it decreases obviously with V RTIL after the critical point. We conclude that the concentration dependence is dominant at lower V RTIL , while the viscosity and phase transformation are dominant at higher V RTIL for the effect of ionic liquid on the decay of rate constant.

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Coexistence of Liquid and Solid Phases of Bmim-PF₆ Ionic Liquid on Mica Surfaces at Room Temperature

Cited by 151 publications

References 27 publications

Study of a shear thickening fluid: the dispersions of silica nanoparticles in 1-butyl-3-methylimidazolium tetrafluoroborate

Study of a shear thickening fluid: the dispersions of silica nanoparticles in 1-butyl-3-methylimidazolium tetrafluoroborate

Poly(a)morphic portrait of the electrical double layer in ionic liquids

Laser photolysis study of anthraquinone in binary mixtures ofionic liquid [bmim][PF6] and organic solvent

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Coexistence of Liquid and Solid Phases of Bmim-PF6 Ionic Liquid on Mica Surfaces at Room Temperature

Cited by 151 publications

References 27 publications

Study of a shear thickening fluid: the dispersions of silica nanoparticles in 1-butyl-3-methylimidazolium tetrafluoroborate

Study of a shear thickening fluid: the dispersions of silica nanoparticles in 1-butyl-3-methylimidazolium tetrafluoroborate

Poly(a)morphic portrait of the electrical double layer in ionic liquids

Laser photolysis study of anthraquinone in binary mixtures ofionic liquid [bmim][PF6] and organic solvent

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Coexistence of Liquid and Solid Phases of Bmim-PF₆ Ionic Liquid on Mica Surfaces at Room Temperature