Solubility determination of surface-active components from dynamic surface tension data
| Autor: | Shi-Yow Lin, Ruey Yug Tsay, Siam Hussain, Thu Thi Yen Le |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Aqueous solution
Dibutyl phthalate General Chemical Engineering Relaxation (NMR) Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Micelle 0104 chemical sciences Surface tension chemistry.chemical_compound chemistry Molecule Methanol Solubility 0210 nano-technology |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 92:297-302 |
| ISSN: | 1226-086X |
| DOI: | 10.1016/j.jiec.2020.09.019 |
| Popis: | A new technique of utilizing the dynamic surface tension (ST) data for solubility determination was proposed, tested, and verified in this study. Dibutyl phthalate was chosen as the surface-active component and its solutions were prepared with 0, 1, and 5 wt.% aqueous methanol (MeOH) solutions. The solutions for ST measurement were prepared by stirring the aqueous DBP mixtures in a heated water bath (45 °C) for an extended duration of time. The data revealed that an increase in DBP concentration corresponded to a more rapid relaxation of dynamic ST and reached a lower equilibrium ST; similar to that observed amongst typical micelle forming surfactants (at C cmc, the dynamic ST relaxations became increasingly rapid. These inconsistencies in dynamic ST behavior pointed towards the absence of micelle formation amongst the DBP molecules. Based on the dynamic ST data, the solubility of DBP in water, 1 wt.%, and 5 wt.% MeOH(aq) were found to be ∼6.1, ∼4.4, and ∼4.7 (10−8 mol/cm3), respectively. |
| Databáze: | OpenAIRE |
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