Abstract
In this study, the properties of amide Gemini surfactants (DLP-12, DLP-14 and DLP-16) were investigated. The results showed that these surfactants have good wettability and solubility, but these properties deteriorate with increasing hydrophobic chain length. The critical micelle concentrations (CMC) measured by the Wilhelmy method and by the steady-state fluorescence spectroscopy were similar and showed the same trend: The CMC values decreased with increasing hydrophobic chain length. The solubilization capacities in toluene were (6320, 6440 and 6680) mL/mol for DLP-12, DLP-14 and DLP-16, respectively, indicating an improvement in solubilization ability. Thermal stability experiments showed that the initial decomposition temperatures of the three surfactants were (301, 320 and 331) °C, respectively, indicating good thermal stability of these surfactants.
About the authors
Yongchen Cai is now working in the Office of Science and Technology Department, Chuzhou University, Chuzhou, Anhui, China. His main research field is the synthesis and property of Gemini surfactants.
Hujun Xu is professor at the School of Chemical & Material Engineering, Jiangnan University, Wuxi, China. His research interests are focused on synthesis and application of surfactants.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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