Dynamic interfacial tension of nonanoic acid/hexadecane/water system in response to pH adjustment

[Display omitted] The ability to accurately model dynamic interfacial tension offers valuable predictive power in non-equilibrium multiphase systems. In this study, a recently-developed technique was employed to experimentally monitor the interfacial tension during neutralization of the adsorbed non...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2018-09, Vol.553, p.562-568
Main Authors: Hyde, Anita E., Phan, Chi M., Yusa, Shin-ichi
Format: Article
Language:English
Subjects:
Dynamic interfacial tension
Oil-water interface
pH-responsive surfactant
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Summary:[Display omitted] The ability to accurately model dynamic interfacial tension offers valuable predictive power in non-equilibrium multiphase systems. In this study, a recently-developed technique was employed to experimentally monitor the interfacial tension during neutralization of the adsorbed nonanoic acid at an oil/water interface. The transient oil/water interfacial tension was successfully obtained during reaction, for more than one hour, by fitting the Young-Laplace equation to the holm meridian. Subsequently, the dynamic data was effectively described by a dynamic model based on the underpinning physical principle: diffusion of hydronium ions. The experimental and modelling methods are applicable to mixtures of alkane/carboxylic acid/water, which are often found in industrial processes.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2018.06.002