Characterization of the addition of lipophilic Span 80 to the hydrophilic Tween 80-stabilized emulsions

Tween 80 was used as surfactant to create Tween 80-stabilized emulsions, and the consequences of the addition of Span 80 to the emulsions were examined. The conductivities and bottle tests of the emulsion system were monitored in the process to detect the phase inversions. The infrared (IR) spectrometer was used to investigate the phase inversions and the results showed that the adsorption changes of the hydroxyl groups in IR spectra could effectively explain the morphologies changes. Morphological evolution of the emulsion with stirring time was applied to analyze the mechanism of the inversion. (C) 2014 Elsevier B.V. All rights reserved.