Abstract
The linear alkylated diphenylmethane sulfonate (C12-DSDM) was synthesized by a four-step reaction with lauric acid, diphenylmethane and chlorosulfonic acid as raw materials. The structure of the final product was characterized by MS. The air–liquid surface tensions at various temperatures and salt solutions (NaCl) were measured by using the drop-volume technique and the thermodynamic parameters of the micellization were calculated. The results show that the critical micelle concentration (CMC) and γ CMC of the surfactant are 1.452 mmol L−1 and 38.49 mN m−1 at 298 K. With an increase in temperature, the CMC gradually increases, the γ CMC and the maximum surface adsorption capacity Γmax decrease. The free energy of micelle formation is negative (−51.2 to −60.5 kJ mol−1).
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Acknowledgments
We would like to thank the Jiangnan University Key Basic Research Program and the Geological and Scientific Research Institute of the Shengli oilfield for financial support.
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Hujun, X., Hui, G., Peng, K. et al. Synthesis and Properties of a Novel Linear Alkylated Diphenylmethane Sulfonate Gemini Surfactant. J Surfact Deterg 16, 57–61 (2013). https://doi.org/10.1007/s11743-012-1407-3
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DOI: https://doi.org/10.1007/s11743-012-1407-3