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《Journal of Zhanjiang Ocean University》 2005-04
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Adsorptive Kinetics of Aqueous Tween 80 Solutionsat the Air-Water Interface

LUO Shi-di~1, MO Chun-sheng~2, XIA Jiao~2, WU Wei-dong~2(1. School of Sciences, Zhanjiang Ocean University, Zhanjiang 524088, China;2. Life Science and Chemistry School, Zhanjiang Normal College, Zhanjiang 524048,China)  
The equilibrium and dynamic surface tensions of the aqueous Tween 80 solutions were measured by the drop volume method at 30℃. The effect of concentration on the dynamic surface tension was discussed. The adsorptive kinetics of Tween 80 at the air-water interface was investigated. The results show that the dynamic surface tension decreases with the increase Tween 80 concentration. The surface adsorption of Tween 80 molecules obeys the pure diffusion at low surfactant concentrations. At higher concentrations, however, the kinetics of adsorption of Tween 80 at the air-water interface is governed by a diffusion-kinetic-controlled mechanism.
【Fund】: 广东省自然科学基金项目(04011432)
【CateGory Index】: O647.3
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