Abstract
A novel sulfonic acid-containing gemini surfactant, 6,6′-(butane-1,4-diylbis(oxy)) bis(3-nonylbenzenesulfonic acid), 9BA-4-9BA, was synthesized in high purity and high yield using a facile preparation pathway, and characterized by FTIR, 1H NMR, and elemental analysis. The content of two sulfonic acid groups was measured by the acid-base titration. DSC and TGA were used to reveal the thermal properties and the product purity. The surface properties of 9BA-4-9BA were evaluated by equilibrium surface tension measurement. It shows that its CMC was 0.65 mmol/L, while the C20 of 0.018 mmol/L was above two orders of magnitude lower than that of traditional monomeric surfactants such as SDS and SDBS, indicating excellent efficiency of micelle formation and reduced surface tension.
Acknowledgments
This work was financially supported by National Natural Science Foundation of China (Grant number 50573004).
Notes
a SDS1: sodium dodecylsulfate; SDS2: sodium dodecylsulfonate; from Ref.[ Citation 26 ]
b SDBS: sodium dodecylbenzene sulfonate, from Ref.[ Citation 27 ]