Abstract: Impact of Ionic Liquid Molecular Structure On Intersurface Forces In Nano-Confined Films (2011 Annual Meeting)

Thursday, October 20, 2011: 12:35 PM

101 B (Minneapolis Convention Center)

Matthew A. Gebbie¹, Eric Fox², Markus Valtiner³, Wesley A. Henderson² and Jacob N. Israelachvili⁴, (1)Materials Department, University of California, Santa Barbara, Santa Barbara, CA, (2)Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC, (3)Department of Chemical Engineering, University of California at Santa Barbara, Santa Barbara, CA, (4)Chemical Engineering, University of California, Santa Barbara, Santa Barbara, CA

Gaining a fundamental understanding of the way ionic liquid (IL) molecular structure impacts thin film properties (<50 nm) plays an increasingly important role in advancing numerous energy-related technologies, especially when combined with the ability to control IL molecular structure. We present results from surface forces apparatus (SFA) measurements across thin films of IM_10RNTf₂-based ILs and discuss the ways the structure of the IL cations impact ordering in nano-confined films. We will also discuss the potential of utilizing SFA measurements for studying IL-solid interfaces [1]. These measurements show that slight changes in IL ion structure impact both the short range oscillatory forces and thin film viscosity of ILs and can help guide the rational design of ILs for optimizing the material properties that are necessary for specific applications.

[1] Min YJ, et al., J. Phys. Chem. C 113(37), 2009, 16445

Extended Abstract: File Not Uploaded

See more of this Session: Interfacial Phenomena In Ionic Liquids
See more of this Group/Topical: Engineering Sciences and Fundamentals