Superspreading of Trisiloxane Surfactant Mixtures on Hydrophobic Surfaces. 1. Interfacial Adsorption of Aqueous Trisiloxane Surfactant−N-Alkyl Pyrrolidinone Mixtures on Polyethylene
| Autor: | Yongfu Wu, Milton J. Rosen and |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Chemistry Inorganic chemistry Surfaces and Interfaces Condensed Matter Physics Surface tension symbols.namesake Adsorption Pulmonary surfactant Electrochemistry Gibbs–Helmholtz equation symbols General Materials Science Titration Pyrrolidinones Spectroscopy Alkyl |
| Zdroj: | Langmuir. 17:7296-7305 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la010466a |
| Popis: | Interfacial adsorptions of aqueous solutions of trisiloxane surfactant (SILWET L77), N-alkyl pyrrolidinones [N-butyl-(C4P), N-cyclohexyl-(CHP), N-hexyl-(C6P), N-2-ethyhexyl-(C2,6P), N-octyl-(C8P), and N-decyl-(C10P)], and their mixtures have been measured. The adsorptions at the air/aqueous solution interface were obtained from the plots of surface tension versus log(C) by use of the Gibbs equation. The adsorptions onto the powdered polyethylene surface were determined by the use of UV spectroscopy for pyrrolidinones and two-phase titration for SILWET L77, respectively. The adsorptions at the solid/air interface were evaluated by the use of an equation derived from the Gibbs and Young equations. It was found that the addition of the N-alkyl pyrrolidinones to the solution produces little or no enhancement of the total surfactant adsorption at the air/aqueous solution interface. At the solid/aqueous solution interface, the enhancement effectiveness of the pyrrolidinones decreases in the order C2,6P > C8P > ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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