关键词: 丙三醇 , 醚键 , 表面张力 , 临界胶束浓度 , 疏水链

Abstract: A series of trimeric anionic surfactants were synthesized from triglycidyl ether of glycerol, long chain alcohols and 1, 3-propane sultone. The molecular structure contains six ether bonds with excellent salt tolerance and three sulfonic groups with good temperature resistance. The structures and properties of the surfactants were studied by infrared spectroscopy, elementary analysis and mass spectrometry, as well as DSC method. The critical micelle concentration of these surfactants which the carbon number of hydrophobic chain is twelve was as low as 6.67×10^-5 mol/L and the surface tension was 25.78 mN/m(t=25 ℃). The results show that their surface activity are more excellent than the corresponding conventional surfactants, and the surface activity is increased as the length of the hydrophobic chain increased.

Key words: Glycerol, Ether bond, Surface tension, Critical micelle concentration(cmc), Hydrophobic chain