ABSTRACT

The mixed surfactants of dodecyltrimethylammonium bromide (DTAB) and 1-dodecyl-3- methylimidazolium bromide (C12mimBr) in aqueous solutions were studied by measurement of electrical conductivity and isothermal titration microcalorimetry (ITC). The critical micelle concentrations (cmc) and the degree of dissociations of counter ions were determined for this system at various surfactant compositions, and the thermodynamic properties of micellization were evaluated. A one-parameter Margules equation was used to fit the cmc values to calculate the mole fraction, the activity coefficients of two surfactant components and the excess properties in mixed micelles.

Compounds

#	Formula	Name
1	C15H34BrN	dodecyltrimethylammonium bromide
2	C16H31BrN2	1-dodecyl-3-methylimidazolium bromide
3	H2O	water

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1 3 2	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 1; Liquid Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	241
POMD	3 2	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	23
POMD	1 3	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	24

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic properties of mixed surfactants of dodecyltrimethylammonium bromide and 1-dodecyl-3-methylimidazolium bromide

Zheng, P.[Peizhu], Cai, D.[Dongxing], Zhao, J.[Jihua], Shen, W.[Weiguo]

ABSTRACT