화학공학소재연구정보센터
Journal of Colloid and Interface Science, Vol.260, No.2, 398-403, 2003
Studies of synergism/antagonism for lowering dynamic interfacial tension in surfactant/alkali/acidic oil systems 3. Synergism/antagonism in surfactant/alkali/acidic model oil systems
Experimental studies have been conducted to elucidate the mechanisms responsible for synergism/antagonism for lowering dynamic interfacial tension (IFT) in surfactant/alkali/hydrocarbon and surfactant/alkali/acidic model oil systems. Dynamic IFTs between hydrocarbon/acidic model oil and alkali/surfactant solutions were measured. We learned from our experimental results that alkali has the function of decreasing n(min) values of surfactant solutions. The synergism/antagonism for lowering the stable values of dynamic IFTs in surfactant/alkali/hydrocarbon and surfactant/alkali/acidic model oil systems depends on factors that can change the EACN/n(min) value, such as the oleic acid in the oil phase and the nmin values of surfactant and alkali. A new explanation with respect to EACN/nmin values is provided. (C) 2003 Published by Elsevier Science (USA).