Journal of Solution Chemistry

, Volume 47, Issue 12, pp 2082–2093 | Cite as

Synthesis, Micellar and Surface Properties of Cationic Trisiloxane Surfactants with Different Siloxane Hydrophobic Groups

  • Jinglin TanEmail author
  • Miaomiao Lin
  • Zhigang Ye


Three cationic trisiloxane surfactants, 1-methyl-1-[bis(trimethylsiloxy)methyl]silyl-propylpyrrolidinium chloride (Si3pyCl), 1-methyl-1-[bis(triethylsiloxy)methyl]silyl-propylpyrrolidinium chloride (Et-Si3pyCl), and 1-methyl-1-[bis(vinyldimethylsiloxy)methyl]silylpropylpyrrolidinium chloride (Vi-Si3pyCl) were synthesized. The aggregation behavior of the trisiloxane surfactants with different siloxane hydrophobic groups in aqueous solution was investigated by surface tension and electrical conductivity measurements. The structures of hydrophobic groups of the trisiloxane surfactants can obviously influence their surface activities and thermodynamics. All the three cationic trisiloxane surfactants have excellent surface activity. Owing to the steric hindrance of hydrophobic groups, the CMC values increase following the order Et-Si3PyCl < Vi-Si3PyCl < Si3PyCl. The \(\Delta G_{\text{m}}^{\text{o}}\) values increase in the order Et-Si3PyCl > Vi-Si3PyCl > Si3PyCl, attributed to the decrease in the hydrophobic effect. The micellization processes of these surfactants are entropy-driven.


Trisiloxane surfactants Steric hindrance Surface activity 



We gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 21563016).

Supplementary material

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Supplementary material 1 (DOCX 62 kb)


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Authors and Affiliations

  1. 1.Jiangxi Province Engineering Research Center of Ecological Chemical Industry, School of Chemical and Environmental EngineeringJiujiang UniversityJiujiangChina

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