Abstract
Eight kinds of condensation products were prepared by the reaction of perfluorooctanoic acid with monoethanolamine and diethanolamine in a molar ratio of 1 : 1 or 1 : 2 at room temperature or 150°C, and investigated for surface activity with respect to surface tension, wettability, oil-repellency, and emulsifying power. In general, the condensation product (1 : 1) of diethanolamine prepared at 150°C showed superior properties to those of other products. Among the three kinds of materials (benzene, kerosene, and soybean oil), kerosene was found to form generally the most stable emulsions, but soybean oil was scarcely emulsified except by the condensation product (1 : 2) of monoethanolamine.
