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Peculiar surface behavior of some ionic liquids based on active pharmaceutical ingredients
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10.1063/1.3549122
/content/aip/journal/jcp/134/7/10.1063/1.3549122
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/7/10.1063/1.3549122

Figures

Image of FIG. 1.
FIG. 1.

Temperature dependence of the surface tension for LD (a), DI (b), and RD (c). The uncertainties are the standard deviations corrected with the student parameter (95%). The curves are guidelines for the eye except for LD and RD above the transition temperatures which represent fittings to a straight line [Eq. (1)] with parameters given in Table III.

Image of FIG. 2.
FIG. 2.

Temperature dependence of the contact angle of LD (a), DI (b), and RD (c) on glass BK7 (▲) and PTFE (▪). The uncertainties are the standard deviations corrected with the student parameter (95%). The curves represent the best fittings of the data.

Image of FIG. 3.
FIG. 3.

Temperature dependence of the dispersive, , (⧫) and nondispersive, , (◊) components of the surface tension of: LD (a), DI (b), and RD (c). The curves are guidelines for the eye.

Image of FIG. 4.
FIG. 4.

Temperature dependence of the polarity fraction, , of the ionic liquids: LD (○), DI (▪) and RD (Δ). The curves are guidelines for the eye.

Tables

Generic image for table
Table I.

Structure, glass transition temperature (T glass), and transition temperature (T Trans) for lidocaine docusate (LD), didecyldimethylammonium ibuprofen (DI) and ranitidine docusate (RD) taken from Ref 2.

Generic image for table
Table II.

Parameters of the density temperature dependence for the ionic liquids: ρ(g mL−1) = a × T(K)2 + b × T(K) + c.

Generic image for table
Table III.

Surface excess entropy, S S, and surface excess energy, E S, calculated from the linear fitting, Eq. (1), above the transition temperature. Uncertainties are the standard deviations corrected with the student parameter (95%).

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/content/aip/journal/jcp/134/7/10.1063/1.3549122
2011-02-15
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Peculiar surface behavior of some ionic liquids based on active pharmaceutical ingredients
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/7/10.1063/1.3549122
10.1063/1.3549122
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