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Publication details

Document type
Journal articles

Document subtype
Full paper

Title
Thermophysical properties of ionic liquid dicyanamide (DCA) nanosystems

Participants in the publication
J.M.P. França (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
F. Reis (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
S.I.C. Vieira (Author)
Dep. Química e Bioquímica
M.J.V. Lourenço (Author)
Dep. Química e Bioquímica
CQE
F.J.V. Santos (Author)
Dep. Química e Bioquímica
CQE
C.A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
A.A.H. Pádua (Author)

Summary
IoNanofluids have emerged as a possible alternative to current engineering fluids for heat transfer applications, namely in small volume heat exchangers and micro-channels. Thermal conductivity and density play a crucial role for the chemical plant design of green processes. Existing data are very scarce and inaccurate, mostly affected by impurities and the presence of water in the ionic liquids.\n\nIn the present paper, we report new data on the thermal conductivity and density of 1-n-butyl-3-methyl-imidazolium dicyanamide ([C4mim][dca]), 1-ethyl-3-methyl-imidazolium dicyanamide ([C2mim][dca]) and 1-butyl-1-methyl-pyrrolidinium dicyanamide ([C4mpyr][dca]) at temperatures between (293 and 343) K at p = 0.1 MPa and IoNanofluids based on them with MWCNTs (multi-walled carbon nanotubes), in order to understand the effect of adding nanomaterials to a ionic liquid matrix and its modification of the heat transfer mechanism. Discussion about the effect of the cation, its side alkyl chain, head group and anion structure in the properties studied concluded that it is essential to understand better the mechanism of heat transfer in these systems, namely the role played by the interface ionic liquid (cation and anion)-nanoparticle, whatever molecular shape they have. Current theories used to calculate the thermal conductivity enhancement are insufficient to predict its value and variation with volume fraction of the nanomaterial.

Date of Publication
2014-12

Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
The Journal of Chemical Thermodynamics

Publication Identifiers
ISSN - 0021-9614

Publisher
Elsevier BV

Volume
79

Number of pages
9
Starting page
248
Last page
257

Document Identifiers
DOI - https://doi.org/10.1016/j.jct.2014.05.008
URL - http://dx.doi.org/10.1016/j.jct.2014.05.008

Keywords
Ionic liquids IoNanofluids Nanosystems 1-Ethyl-3-methyl-imidazolium dicyanamide 1-n-Butyl-3-methyl-imidazolium dicyanamide 1-Butyl-1-methyl-pyrrolidinium dicyanamide

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APA
J.M.P. França, F. Reis, S.I.C. Vieira, M.J.V. Lourenço, F.J.V. Santos, C.A. Nieto de Castro, A.A.H. Pádua, (2014). Thermophysical properties of ionic liquid dicyanamide (DCA) nanosystems. The Journal of Chemical Thermodynamics, 79, 248-257. ISSN 0021-9614. eISSN . http://dx.doi.org/10.1016/j.jct.2014.05.008

IEEE
J.M.P. França, F. Reis, S.I.C. Vieira, M.J.V. Lourenço, F.J.V. Santos, C.A. Nieto de Castro, A.A.H. Pádua, "Thermophysical properties of ionic liquid dicyanamide (DCA) nanosystems" in The Journal of Chemical Thermodynamics, vol. 79, pp. 248-257, 2014. 10.1016/j.jct.2014.05.008

BIBTEX
@article{35942, author = {J.M.P. França and F. Reis and S.I.C. Vieira and M.J.V. Lourenço and F.J.V. Santos and C.A. Nieto de Castro and A.A.H. Pádua}, title = {Thermophysical properties of ionic liquid dicyanamide (DCA) nanosystems}, journal = {The Journal of Chemical Thermodynamics}, year = 2014, pages = {248-257}, volume = 79 }