ABSTRACT

In this work, the ionic liquids potentialities to organize themselves in aqueous solution and produce aggregates were analyzed through the conductivimetry technique and after using a new mathematical model based on stochastic theories, to indicate the linearity change moment; it was possible to analyze the presence of these aggregates. It earns interest at science of colloids and interfacial chemistry due to the recognized ability of certain surfactant ionic liquids to reduce the surface tension of aqueous solutions and to aggregate in the form of micelles, even at low concentrations, allowing their use as stabilizing or destabilizing agents in homogeneous polymerization in water/oil emulsions. Within this context, this work aims to verify the possible micellar properties of the ionic liquids. Critical micellar concentration values for ions ammonium alkyl carboxylates were obtained. It was also shown that the CMC is directly related to the lipophilic groups of the cation and entropic factors.

Compounds

#	Formula	Name
1	C4H11NO3	2-hydroxyethylammonium acetate
2	C5H13NO3	2-hydroxyethan-1-aminium propionate
3	C6H15NO3	2-hydroxy ethylammonium butanoate
4	C7H17NO3	2-hydroxy ethylammonium pentanoate
5	C6H15NO4	2,2'-azanediylbis(ethanol) acetate
6	C7H17NO4	bis(2-hydroxyethyl)ammonium propanoate
7	C8H19NO4	diethanolamine butyrate
8	C9H21NO4	diethanolamine pentanoate
9	C5H13NO3	N-methyl-2-hydroxyethylammonium acetate
10	C6H15NO3	2-hydroxy-N-methylethanaminium propionate
11	C7H17NO3	N-methyl-2-hydroxyethylammonium butanoate
12	C8H19NO3	2-hydroxy-N-methylethanaminium pentanoate
13	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 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	58
POMD	2 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	55
POMD	3 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	67
POMD	4 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	57
POMD	5 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	57
POMD	6 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	65
POMD	7 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	62
POMD	8 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	61
POMD	9 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 9; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	53
POMD	10 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 10; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	67
POMD	11 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 11; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	56
POMD	12 13	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 12; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Alternating current cell with electrodes	68

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Micelle Formation of Protic Ionic Liquids in Aqueous Solution

Santos, Dheiver

ABSTRACT