- Title
- Near surface properties of mixtures of propylammonium nitrate with n-alkanols 1. Nanostructure
- Creator
- Elbourne, Aaron; Cronshaw, Samuel; Voitchovsky, Kislon; Warr, Gregory C.; Atkin, Rob
- Relation
- ARC.DP120102708 http://purl.org/au-research/grants/arc/DP120102708
- Relation
- Physical Chemistry Chemical Physics Vol. 17, p. 26621-26628
- Publisher Link
- http://dx.doi.org/10.1039/C5CP04786B
- Publisher
- Royal Society of Chemistry
- Resource Type
- journal article
- Date
- 2015
- Description
- 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.
- Subject
- ionic liquids; atomic force microscopy; propylammonium nitrate (PAN); n-alkanols
- Identifier
- http://hdl.handle.net/1959.13/1306563
- Identifier
- uon:21211
- Identifier
- ISSN:1463-9076
- Language
- eng
- Full Text
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