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Near surface properties of mixtures of propylammonium nitrate with n-alkanols 1. Nanostructure

Elbourne, A.; Cronshaw, S.; Voïtchovsky, K.; Warr, G.G.; Atkin, R.

Near surface properties of mixtures of propylammonium nitrate with n-alkanols 1. Nanostructure Thumbnail


Authors

A. Elbourne

S. Cronshaw

G.G. Warr

R. Atkin



Abstract

In situ amplitude modulated-atomic force microscopy (AM-AFM) has been used to probe the nanostructure of mixtures of propylammonium nitrate (PAN) with n-alkanols near a mica surface. PAN is a protic ionic liquid (IL) which has a bicontinuous sponge-like nanostructure of polar and apolar domains in the bulk, which becomes flatter near a solid surface. Mixtures of PAN with 1-butanol, 1-octanol, and 1-dodecanol at 10–70 vol% n-alkanol have been examined, along with each pure n-alkanol, to reveal the effect of composition and n-alkanol chain length. At low concentrations the butanol simply swells the PAN near-surface nanostructure, but at higher concentrations the nanostructure fragments. Octanol and dodecanol first lower the preferred curvature of the PAN near-surface nanostructure because, unlike n-butanol, their alkyl chains are too long to be accommodated alongside the PAN cations. At higher concentrations, octanol and dodecanol self-assemble into n-alkanol rich aggregates in a PAN rich matrix. The concentration at which aggregation first becomes apparent decreases with n-alkanol chain length.

Citation

Elbourne, A., Cronshaw, S., Voïtchovsky, K., Warr, G., & Atkin, R. (2015). Near surface properties of mixtures of propylammonium nitrate with n-alkanols 1. Nanostructure. Physical Chemistry Chemical Physics, 17(40), 26621-26628. https://doi.org/10.1039/c5cp04786b

Journal Article Type Article
Acceptance Date Sep 9, 2015
Publication Date Oct 1, 2015
Deposit Date Dec 17, 2015
Publicly Available Date Sep 9, 2016
Journal Physical Chemistry Chemical Physics
Print ISSN 1463-9076
Electronic ISSN 1463-9084
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 17
Issue 40
Pages 26621-26628
DOI https://doi.org/10.1039/c5cp04786b

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