title: 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.
abstract: 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 n(min) values of surfactant and alkali. A new explanation with respect to EACN/n(min) values is provided.
authors.affiliation: Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, People's Republic of China. yjy@ipc.ac.cn
authors.forename: Lu
authors.initials: L
authors.lastname: Zhang
authors.forename: Lan
authors.initials: L
authors.lastname: Luo
authors.forename: Sui
authors.initials: S
authors.lastname: Zhao
authors.forename: Baohua
authors.initials: B
authors.lastname: Yang
authors.forename: Jiayong
authors.initials: J
authors.lastname: Yu