2015
DOI: 10.1007/s11705-015-1511-9
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Rheological behavior of mixed system of ionic liquid [C8mim]Br and sodium oleate in water

Abstract: We report on the rheological behavior of wormlike micelles constructed by ionic liquid surfactant [C 8 mim]Br (1-octyl-3-methylimidazolium bromide) and anionic surfactant sodium oleate (NaOA) in aqueous solution. The effects of surfactant composition, total surfactant concentration, added salts, and temperature were investigated. The prevailing surfactant effect at lower concentration and the leading cosolvent effect at higher concentration of [C 8 mim]Br may be the main reasons for appearance of well-establis… Show more

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Cited by 6 publications
(3 citation statements)
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“…Therefore, the Carreau model and Maxwell model proposed for polymer solutions are also usually utilized to describe the rheological properties of wormlike micellar solutions. [41][42][43] As mentioned above, the apparent viscosity of the solution in phase I in the ternary phase diagram of 12-3(OH)-12$2Br − /trans-OHCA/H 2 O system changes signicantly with the increase of trans-OHCA content, which indicates that the structure of the aggregates in the system changed as well. Therefore, the steady-state viscosity and dynamic elastic and viscous moduli of a series of solutions with 40 mM concentration and 0-36% trans-OHCA molar percentage were determined in detail.…”
Section: Resultsmentioning
confidence: 82%
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“…Therefore, the Carreau model and Maxwell model proposed for polymer solutions are also usually utilized to describe the rheological properties of wormlike micellar solutions. [41][42][43] As mentioned above, the apparent viscosity of the solution in phase I in the ternary phase diagram of 12-3(OH)-12$2Br − /trans-OHCA/H 2 O system changes signicantly with the increase of trans-OHCA content, which indicates that the structure of the aggregates in the system changed as well. Therefore, the steady-state viscosity and dynamic elastic and viscous moduli of a series of solutions with 40 mM concentration and 0-36% trans-OHCA molar percentage were determined in detail.…”
Section: Resultsmentioning
confidence: 82%
“…45 For wormlike micelle solution, the high plateau of the viscosity curve is generated by the intertwined micellar network restricting the solution to strain under shear force, which is generally dened as zero-shear viscosity (h 0 ). 43 However, the structure of wormlike micelles is not unbreakable, wormlike micelles are constantly in a dynamic equilibrium of breaking/recombination. 46,47 When the shear rate is fast (the shear force is strong) enough, the linear wormlike micelles will massively break, the formed micelle "fragments" are aligned along the direction of the shear force, and the resulting stress relaxation of the system leads to the viscosity of the solution decreased seriously.…”
Section: Resultsmentioning
confidence: 99%
“…The viscosity at the platform is generally defined as zero shear viscosity ( η 0 ). 55 The shear-thinning phenomenon and η 0 are the typical sign of worm-like micelles, 56 which usually can be observed in mixed systems of certain surfactants and salts. 57 The inset in Fig.…”
Section: Resultsmentioning
confidence: 99%