Effect of solvent on surfactant adsorption kinetics: Dibutyl phthalate in aqueous MeOH solvents
| Autor: | Tzu-Ning Chin, Shi-Yow Lin, Siam Hussain, Thu Thi Yen Le |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Aqueous solution
Dibutyl phthalate Inorganic chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Surface tension Solvent chemistry.chemical_compound Adsorption chemistry Pulmonary surfactant Materials Chemistry Methanol Physical and Theoretical Chemistry Solvent effects 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 335:116157 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2021.116157 |
| Popis: | Despite extensive literature regarding the effect of solvent on numerous physicochemical processes, the solvent effect on the adsorption kinetics of a surface-active compound is yet to be explored. This study first investigated the adsorption kinetics of dibutyl phthalate (DBP) in 1 wt% aqueous methanol (MeOH) solvent: dynamic and equilibrium surface tension (ST) data were measured using a pendant bubble tensiometer and the resultant ST data were examined via theoretical simulation. The adsorption of DBP onto a clean air-water interface was found to be of mixed-control (Frumkin model with K = −0.89), indicating a non-negligible interaction amongst the adsorbed DBP molecules. Subsequent examination of DBP’s adsorption kinetics in 0, 1, and 5 wt% MeOH(aq) solvents revealed a strong solvent effect on the (i) dynamic and equilibrium ST relaxations, (ii) dependency of surface concentration on DBP concentration, and (iii) intermolecular interaction amongst the adsorbed DBP molecules. Besides, although all the adsorption mechanisms of DBP in these three solvents were of mixed control, it was observed to be more biased towards diffusion-control at increasing MeOH concentration. |
| Databáze: | OpenAIRE |
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