Synthesis and the surface chemical properties of tetramer sulfonate surfactants

A tetramer sulfonate surfactant TSS (Ⅲ) was prepared by etherification, ring-opening reaction and sulfonation reaction, using pentaerythritol, epichlorohydrin, dodecanol, 1, 3-propane sultone as main raw materials. Elemental analysis and IR characterized the structures of tetramer sulfonate surfactants. The surface chemical properties under different temperature were studied by surface tension measurement. The results show that the surfactant TTS (Ⅲ) has a lower cmc (critical micelle concentration) and more excellent surface activity. The cmc and surface tension (γ_cmc) is 6.85×10^-5 mol/L and 25.59 mN/m respectively at 40 ℃. With temperature increasing, A_min and c_cmc/c₂₀ increases, but Γ_max decreases.