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Volumn 115, Issue 16, 2011, Pages 4654-4661

Modeling the interfacial tension in oil-water-nonionic surfactant mixtures using dissipative particle dynamics and self-consistent field theory

Author keywords

[No Author keywords available]

Indexed keywords

CURRENT VOLTAGE CHARACTERISTICS; INDUSTRIAL APPLICATIONS; MOLECULAR ORBITALS; NONIONIC SURFACTANTS;

EID: 79955426984     PISSN: 15206106     EISSN: 15205207     Source Type: Journal    
DOI: 10.1021/jp109234u     Document Type: Article
Times cited : (75)

References (55)
  • 4
    • 0003861074 scopus 로고
    • Ed.; Academic Press: London
    • Tadros, R. F., Ed.; Surfactants; Academic Press: London, 1985.
    • (1985) Surfactants
    • Tadros, R.F.1
  • 51
    • 84906390138 scopus 로고    scopus 로고
    • Calculated interfacial tensions are very sensitive to the choice of the Flory-Huggins parameters, as one would naturally expect. We found, e.g., that changing π(C-E) or π(E-W) by 15-20% of their values could shift the IFT vs surfactant concentration curve to the left (lower concentrations) or right (higher concentrations) by as much as 1 order of magnitude
    • Calculated interfacial tensions are very sensitive to the choice of the Flory-Huggins parameters, as one would naturally expect. We found, e.g., that changing π(C-E) or π(E-W) by 15-20% of their values could shift the IFT vs surfactant concentration curve to the left (lower concentrations) or right (higher concentrations) by as much as 1 order of magnitude.
  • 52
    • 84906404805 scopus 로고    scopus 로고
    • y = 2 makes all calculations essentially one-dimensional
    • y = 2 makes all calculations essentially one-dimensional.
  • 53
    • 84906390139 scopus 로고    scopus 로고
    • -4), it becomes difficult to achieve equilibrium in pendant drop IFT measurements. Indeed, once all surfactants available near the oil drop are consumed to build a monolayer at the oil/water interface, those molecules in the interfacial monolayer will be continuously leached out into the drop phase. Thermodynamic equilibrium in the system will be only obtained when the entire oil drop is saturated with surfactants at equilibrium level. This process is essentially diffusion-controlled and the time to reach equilibrium may become prohibitively long as the oil drop volume increases with decreasing interfacial tension. During the transient period, the reproducibility of the data will be greatly influenced by total experimental time and the initial condition, e.g., oil drop size.
    • -4), it becomes difficult to achieve equilibrium in pendant drop IFT measurements. Indeed, once all surfactants available near the oil drop are consumed to build a monolayer at the oil/water interface, those molecules in the interfacial monolayer will be continuously leached out into the drop phase. Thermodynamic equilibrium in the system will be only obtained when the entire oil drop is saturated with surfactants at equilibrium level. This process is essentially diffusion-controlled and the time to reach equilibrium may become prohibitively long as the oil drop volume increases with decreasing interfacial tension. During the transient period, the reproducibility of the data will be greatly influenced by total experimental time and the initial condition, e.g., oil drop size. Therefore, expanding the experiment over the broader range of surfactant concentration will result in a nontrivial issue regarding reduced data accuracy. For more details, see Supporting Information.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.