Research on the perfluorinated hexyl-based gemini fluorine environment friendly surfactant

In order to solve the environmental problem of poor biodegradability of fluorocarbon surfactant with perfluorinated long chain (≥C₈), a new type of short fluorocarbon gemini-fluoro surfactant was designed and synthesized in this paper on the basis of perfluoro hexyl, and its internal performance was studied by surface tension method. The results showed that the short fluorocarbon gemini-fluoro surfactant has good water solubility, strong surface activity, and the critical micelle concentration is as low as 3.0 × 10^-4-3.4×10^-4 mol/L and γ_cmc = 16.0 mN/m; it also has excellent salt resistance, and has high surface activity under high salinity condition; it has good temperature resistance and chemical stability, and can adapt to high temperature, strong acid and alkali complex environment; and the short fluorocarbon chain fluorine surfactant has less damage to the environment, it can be used as a substitute of perfluorinated long chain fluorine surfactant, and has good application prospect.