Resumo

ZEPPIERI, Susana; RAMIREZ, Yurimia; MOLINA, Jessica  e  LOPEZ DE RAMOS, Aura L. Experimental Study of Transient Interfacial Tension for Alkane-Water-Triton X-100 System using the Emergent Drop Technique. Inf. tecnol. [online]. 2009, vol.20, n.6, pp. 125-135. ISSN 0718-0764.  doi: 10.4067/S0718-07642009000600015.

The objective of this work was to study the effect of the concentration of a non-ionic surfactant in water on the interfacial tension of an alkane series. For this purpose Triton X-100 and the alkanes: hexane, heptane, octane, decane, undecane and dodecane were selected for analysis. The tests were done at concentrations of 10^-3, 10^-4 and 10^-5 mol/L and the emergent drop model was employed for the calculation of the interfacial tension. In this work it was observed that the interfacial tension of the Triton X-100 solutions in water decreased as the concentration of the surfactant increase. It was concluded that the interfacial tension value is a function of the concentration, the exposure time of the interface with the dissolution and the initial volume of the drop at the moment when the measurement starts.

Palavras-chave : Triton X-100; alkanes; emergent drop method; transient interfacial tension.