Adsorption of heptane–toluene binary mixtures on a hydrophobic polymer surface

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dc.contributor.authorRamsay, Margo
dc.contributor.authorBeutier, Clémentine
dc.contributor.authorMcGarvey, G. Bryce
dc.contributor.authorHore, Dennis K.
dc.date.accessioned2020-01-26T21:37:10Z
dc.date.available2020-01-26T21:37:10Z
dc.date.copyright2019en_US
dc.date.issued2019
dc.description.abstractPolymer coatings offer a means to modulate the adsorption of molecules onto solid surfaces by offering a surface functionality, charge, roughness, and hydrophobicity that is different from the underlying substrate. One application is to provide anti-fouling functions for metal surfaces. Understanding solvent-surface interactions is an essential component to gaining mechanistic insight into the adsorption process. In this work, we study the adsorption of toluene–heptane binary mixtures onto a perflurorinated polymer surface. We use a combination of IR absorption and Raman scattering spectroscopy to study the mixture in the bulk phase, and surface-specific visible-infrared sum-frequency generation to probe the surface layers. Through the use of homo- and heterospectral two-dimensional correlation spectroscopy, we conclude that the adsorption of the two solvents is reversible and that the surface structure is generally independent of the surface composition, with a small change in toluene orientation as the toluene content increases. We also find that the hydrophobic fluropolymer has very little preference for either solvent, similar to previous studies on hydrophilic surfaces.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipWe thank the Natural Sciences and Engineering Research Council of Canada (NSERC) for support of this science with a Discovery Grant and Imperial Oil for a University Research Award. NSERC in partnership with Imperial Oil provided funding with a Collaborative Research and Development grant. Tasha Jarisz provided experimental assistance, and Sandra Roy participated in the discussion of the 2DCOS results. Stanislav Konorov assisted in the collection of the Raman spectra at the University of Victoria CAMTEC facility.en_US
dc.identifier.citationRamsay, M.; Beutier, C.; McGarvey, G. B.; & Hore, D. K. (2017). Adsorption of heptane–toluene binary mixtures on a hydrophobic polymer surface. The Journal of Chemical Physics, 150(1), 014702. DOI: 10.1063/1.5066555en_US
dc.identifier.urihttps://doi.org/10.1063/1.5066555
dc.identifier.urihttp://hdl.handle.net/1828/11509
dc.language.isoenen_US
dc.publisherThe Journal of Chemical Physicsen_US
dc.subjectRaman spectroscopy
dc.subjectSurface and interface chemistry
dc.subjectPolymers
dc.subjectCorrelation spectroscopy
dc.subjectInfrared absorption spectroscopy
dc.subjectSum-frequency generation
dc.subject.departmentDepartment of Chemistry
dc.titleAdsorption of heptane–toluene binary mixtures on a hydrophobic polymer surfaceen_US
dc.typeArticleen_US

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