Effects of Spacer Length on the Surface Properties of Cationic Gemini Fluorosurfactants

Abstract

A novel class of cationic gemini fluorosurfactants with different spacer and same hydrophobic chain were synthesized. They were structurally characterized by NMR (1H and 19F), FT-IR, ESI-MS and elemental analysis. The equilibrium surface tensions were studied. The results showed that the gemini fluorosurfactants with the shorter spacer displayed higher surface activity, lower surface tension (21.48 mN/m) can be reached. Besides, the synergistic properties of these synthesized gemini fluorosurfactants with sodium dodecyl benzene sulfonate (SDBS) were investigated.

Phase-out-compliant fluorosurfactants: unique methimazolium derivatives including room temperature ionic liquids

“…[96][97][98] This has led to the rule of thumb that the greater the hydrophobicity of a cation, the greater the observed acute toxic effect. On the other hand, sole structural characteristics with key influence on the surfactancy of detergents and tensides 99 cannot be correlated conclusively to their general toxicological profiles 100,101 since, especially for segmented fluorosurfactants, the specific modes of bio-physico-chemical action are complex and mostly lacking detailed overall insight. 102 Predictions on the toxicity of organic fluorine compounds based on chemical structural elements can be rather unreliable.…”