title: Ionic liquids as modulators of the critical micelle concentration of sodium dodecyl sulfate.
abstract: Critical micelle concentration (CMC) of sodium dodecyl sulfate (SDS), an anionic surfactant, has been investigated in aqueous solutions of a variety of room temperature ionic liquids (RTILs): 1,3-dimethylimidazolium iodide (Me2IM-I, 2), 1-butyl-3-methylimidazolium chloride (BMIM-Cl, 3), 1-hexyl-3-methylimidazolium chloride (HxMIM-Cl, 4), 1-methyl-3-octylimidazolium chloride (MOIM-Cl), 5, and 1-methyl-3-octylimidazolium tetrafluoroborate (MOIM-BF4, 6). The CMC of SDS is shown to correlate with the nature of the alkyl groups in the RTILs; SDS showed appreciably higher CMCs in presence of ionic liquids 2 and 3, whereas in the presence of ionic liquids 4, 5, and 6 much smaller CMCs were observed. The nature of the gigenions, Cl- or BF4-, has no noticeable effect on the observed CMC values.
authors.affiliation: Department of Chemistry, University of Missouri-Rolla, 142 Schrenk Hall, Rolla, MO 65409, USA.
authors.forename: Ayse
authors.initials: A
authors.lastname: Beyaz
authors.forename: Woon Su
authors.initials: WS
authors.lastname: Oh
authors.forename: V Prakash
authors.initials: VP
authors.lastname: Reddy
mesh_terms: D002412:Cations / Q000737:chemistry; D007477:Ions / Q000737:chemistry*; D008823:Micelles; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*
chemical_list: D002412:Cations; D007477:Ions; D008823:Micelles; D012997:Solvents; D012967:Sodium Dodecyl Sulfate