کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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608362 | 880580 | 2012 | 5 صفحه PDF | دانلود رایگان |
Pendant drop and buoyant bubble methods have been used to study the surface characteristics of alkyl amines at the water/air surface. The investigated alkyl amines, triethylamine and octylamine, showed unusual changes in the surface tension as a function of time: an initially steep drop and a subsequent steady increase in the surface tension until a value close to the one of the pure water/air system was observed. This phenomenon is explained by the evaporation of the alkyl amines, for which several sets of experiments have been conducted with the pendant drop and buoyant bubble methods. Using an appropriate experimental protocol, the equilibrium adsorption behaviour of the two amines can be quantitatively measured.
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► With time, an increase in the surface tension of alkyl amines can be observed.
► The increase in surface tension can be ascribed to the evaporation of alkyl amines.
► Limiting the evaporation of alkyl amines, the equilibrium surface can be obtained.
Journal: Journal of Colloid and Interface Science - Volume 372, Issue 1, 15 April 2012, Pages 202–206