Jump to main content
Jump to site search


Exploring the bulk-phase structure of ionic liquid mixtures using small-angle neutron scattering

Abstract

Small-angle neutron scattering experiments, supported by molecular dynamics simulations, have been performed on a range of compositions of the [C2mim]1-x[C12mim]x[Tf2N] ionic liquid mixture system. Isotopic contrast variation, through selective deuteration of both cations, has been used to assist in fitting the data to different scattering models. These data, and subsequent fitting, show that the structure of the ionic liquid mixtures changes substantially as a function of composition. Mixtures where x < 0.32 are dominated by aggregates of amphiphilic [C12mim]+ ions in the relatively polar [C2mim][Tf2N] solvent. Compositions where x > 0.32 can be described as bicontinuous, containing networks of both polar and non-polar domains, where the C12 chains of the [C12mim]+ ions percolate through the system to form a continuous non-polar sub-phase. Temperature-dependent scattering experiments suggest that there is relatively little change in bulk structure in these liquids between 20 and 60 oC. The presence of water, however, does influence some aspects of the liquid structure in a composition that is rich in [C2mim][Tf2N] (where x = 0.24).

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 May 2017, accepted on 26 Jun 2017 and first published on 26 Jun 2017


Article type: Paper
DOI: 10.1039/C7FD00167C
Citation: Faraday Discuss., 2017, Accepted Manuscript
  •   Request permissions

    Exploring the bulk-phase structure of ionic liquid mixtures using small-angle neutron scattering

    C. P. Cabry, L. D'Andrea, K. Shimizu, I. Grillo, P. Li, S. E. Rogers, D. W. Bruce, J. N. Canongia Lopes and J. M. Slattery, Faraday Discuss., 2017, Accepted Manuscript , DOI: 10.1039/C7FD00167C

Search articles by author

Spotlight

Advertisements