One <i>F</i>-Octyl versus Two <i>F</i>-Butyl Chains in Surfactant Aggregation Behavior
作者:Abdoulaye Dramé、Elisabeth Taffin de Givenchy、Samba Yandé Dieng、Sonia Amigoni、Mamadou Oumar、Alioune Diouf、Thierry Darmanin、Frédéric Guittard
DOI:10.1021/la403173v
日期:2013.12.3
An easy synthetic procedure in two or three steps from perfluoroalkylethyl iodide derivatives led to six novel fluorinated carboxylates monomeric and gemini surfactants with one or two hydrophobic tails, respectively: R-F(C2H4)CH(CO2-)(2),2Na(+) and [RF(C2H4)](2)C(CO2-),Na+, where R-F = C4F9, C6F13, and C8F12. These anionic surfactants exhibited very low surface tension from 15 to 33 mN/m as well as low critical micelle concentration until 1.3 x 10(-4) mol/L. Furthermore, the surface properties of the gemini compound with two short fluoroalkyl chains (R-F = C4F9) were found to be almost equal to those of the monomeric surfactant with one long fluoroalkyl chain (R-F = C8F17), which could provide an interesting alternative to the bioaccumulative long-chain perfluorinated surfactant.