Synthesis, Structure and Hydration of Sodium Dioleyl Sulfosuccinate

Abstract

The reaction yield of sodium dioleyl sulfosuccinate (SDSS) was greatly improved by increasing the sulfonation reaction time, by replenishing NaHSO3 during the reaction and by purifying the product using extraction instead of recrystallization. The geometry and electronic structure of the anionic surfactant SDSS were fully optimized with density functional theory at B3LYP/6-31G* level. The trans isomer was more steady than the cis isomer. This was explained by protein extraction with reversed micelles of SDSS. The interaction between the anionic SDSS with H2O was also calculated at B3LYP/6-31G* level. The geometry, electronic structure and hydration energy of this interaction is also reported. The hydrophilic mechanism of the anionic SDSS was also determined.