Surface Activity,Thermodynamics of Micellization and Adsorption Properties of Quaternary Salts Based on Ethanolamines and Decyl Bromide |
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Authors: | Ziyafaddin H Asadov Ravan A Rahimov Shafiga M Nasibova Gulnara A Ahmadova |
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Affiliation: | (1) Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, Hojaly Ave. 30, 1025 Baku, Azerbaijan; |
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Abstract: | The surface-active properties of ionic-liquid type salts synthesized by the interaction of ethanolamines and decyl bromide
have been studied. Surface tension as a function of concentration of the surfactant in aqueous solution was measured at 10,
20, 30 and 40 °C using a drop volume stalagmometer. From these measurements, the maximum surface excess concentration and
the minimum area per molecule at the aqueous solution/air interface, the critical micelle concentration (CMC), the surface
pressure at the CMC, and the standard thermodynamic parameters of adsorption and micellization were calculated. The structural
effects on adsorption, micellization, and the effectiveness of surface tension reduction are discussed in terms of these parameters. |
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