A Novel Synthesis of SO3H Type Gemini Surfactant Having Semifluoroalkyl Group as Hydrophobic Group

作者：Kawase Tokuzo^*; Iidzuka Jun ichi; Oida Tatsuo

来源：Journal of Oleo Science, 2010, 59(9): 483-493.

DOI：10.5650/jos.59.483

• gemini surfactant
• semifluoroalkyl group
• SO3H group
• surface tension

In this work, novel SO3H type Gemini surfactants having semifluoroalkyl group (RfCH(2)CH-: Rf = C4F9, C6F13, C8F17) as hydrophobic group were successively synthesized by the radical addition of fluoroalkyl to 1,4-pentadiene using fluoroalkyl iodide and AIBN as initiator, and the following thiocyanization (-SCN), conversion to -SH, and oxidation to SO3H as hydrophilic group. Similarly, the common 1+1 type semifluoroalkyl surfactants having SO3H were synthesized.
Surfactant properties of their sodium salts (cmc, gamma(cmc), pC(20), Gamma(cmc), and A) were investigated by measuring surface tension. As expected, the cmc value of Gemini surfactant whose fluoroalkyl is C4F9 was more than one order of magnitude smaller than that of the corresponding 1+1 type. Other properties also showed the excellent efficiency of Gemini structure to reduce the surface tension.

• 出版日期2010-9