Poster (Outreach)

FZJ-2022-01630

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ionic liquids in mild confinement

Frielinghaus, H. (Corresponding author)FZJ* ; Noferini, D. ; Holderer, O.FZJ*

2021

Abstract: The structure and dynamics of the ionic liquid 1-ethyl-3-methylimidazolium acetate (EMIMAc) in porous glass with pores of the size 40 and 100 Å is determined in comparison to the bulk liquid. We employed x-ray diffraction to measure the domain structure, and neutron backscattering for the dynamics. In confinement, the liquid displays onion-like domain structuring while in bulk the liquid is largely forming a bicontinuous structure similar to microemulsions. This also has an effect on the dynamics of the liquid at high temperatures (373K): The ions in the bulk can diffuse along the domain boundaries while they need to cross the domains in the ordered state in confinement. At low temperatures, the attractive forces of all ions are such strong – we have a highly viscous fluid – such that the diffusion in any direction is similarly slow, and the exact domain structure plays a minor role.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Energy (1st) ; Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Heinz Maier-Leibnitz Zentrum (MLZ)
3. Neutronenstreuung (JCNS-1)
4. JCNS-4 (JCNS-4)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. SPHERES: Backscattering spectrometer (NL6S)

Appears in the scientific report 2022

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