聚乙二醇－双－全氟2-［（2-丙氧基）－丙氧基］丙酸酯的合成与性能

Fluorocarbon surfactant diperfluorous 2-(2-propoxy-propoxy) propionic ester of polyglycol (Ⅰ) was synthesized by esterification of perfluoro (2, 5-dimethyl-3, 6-dioxananoyl) fluoride and polytglycol-400. The prepared surfactant I was characterized by FT-IR, 1H-NMR and 19F-NMR, respectively, and its surface activities were investigated too. The surface tension (γ(subscript cmc)) of surfactant Ⅰ at critical micelle concentration (CMC) is 17.69 mN•m^(-1) and the value of CMC is 0.54 g•L^(-1). The values of CMC and γ(subscript cmc) decrease clearly with increasing temperature, but are little affected by pH value. The prepared surfactant Ⅰ has good surface activities in both acid and basic solutions; Ca(superscript 2+) and Mg(superscript 2+) have little effects on the critical micelle concentration of aqueous solution of surfactant Ⅰ, and the surface activity of surfactant Ⅰ is slightly affected by inorganic cation Na(superscript +), in other words, the effect of salinity on non-ionic surface-active agent of surfactant I is little. In short, the fluorocarbon surfactant diperfluorous 2-(2-propoxy-propoxy)propionic ester of polyglycol is an excellent surfactant with high surface activity and good resistance to water hardness, water salinity acid and alkali.