Abstract
Some kinds of fluorinated surfactants have been prepared from perfluorooctanesulfonyl fluoride (1) and their surface active properties determined.
Intermediate aminoamides (2 and 3) were obtained via reactions of (1) with alkylamines (C2-C4) or N, N-dimethylamine. (2) was reacted with ethyl chloroacetate to convert into sulfonamidocardoxylic ester which was then hydrolized to the corresponding alkali metal salt as anionic surfactant. (3) was quaternarized by methyl iodide or dimethyl sulfate and two kinds of quaternary salts were obtained as cationic surfactants. At the same time (3) was reacted with 1, 3-propanesultone to prepare sulfobetaine-type amphoteric surfactant. Surface active properties of the above surfactants have been investigated regarding surface tension, critical micelle concentration and emulsifying power.
