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Transport properties of binary solutions containing the ionic liquid BMI.BF4 and ethylene glycol

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Transport properties of binary solutions containing the ionic liquid BMI.BF4 and ethylene glycol

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Título Transport properties of binary solutions containing the ionic liquid BMI.BF4 and ethylene glycol
Autor Silva, Fernanda Trombetta da
Lima, Demétrius William
Becker, Márcia Regina
Souza, Roberto Fernando de
Martini, Emilse Maria Agostini
Abstract The ionic conductivity values of the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate (BMI.BF4) and ethylene glycol (EG) electrolytes in different concentrations and over a wide temperature range were determined. The results are discussed in terms of the interactions between the cations and anions of the ionic liquid and the organic solvent. The temperaturedependence of the ionic conductivity for BMI.BF4, as well as solutions containing BMI.BF4 and EG as electrolytes, in the temperature range of 248-358 K, obeys the Vogel-Tammann-Fulcher equation. The highest ionic conductivity was 42 mS cm-1 obtained with a solution of BMI.BF4 in EG at a molar fraction of 0.50 (358 K) due to the high ionic mobility. The critical micellar concentration (cmc) of 0.1 mol L-1 determined through the ionic conductivity indicates that BMI.BF4 behaves as a weak electrolyte above this value. The results obtained indicate that binary solutions based on BMI.BF4 and EG are appropriate for use in technological applications, such as capacitors.
Contido em Journal of the Brazilian Chemical Society. São Paulo. Vol. 26, no. 10 (Oct. 2015), p. 2125-2129
Assunto Condutividade iônica
Etilenoglicol
Líquidos iônicos
[en] 1-butyl-3-methylimidazolium tetrafluoroborate
[en] Critical micellar concentration
[en] Ethylene glycol
[en] Ionic conductivity
[en] Ionic liquid
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/142277
Arquivos Descrição Formato
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