Adsorption and thermodynamic properties of dissymmetric gemini imidazolium surfactants with different spacer length

作者：Zhao, Xiaohui; An, Dong; Ye, Zhiwen^*

来源：Journal of Dispersion Science and Technology, 2017, 38(2): 296-302.

DOI：10.1080/01932691.2016.1163721

• Gemini imidazolium surfactants
• surface activity
• thermodynamic parameters
• the dissymmetry
• the spacer length

A series of dissymmetric gemini imidazolium surfactants with different spacer length ([C(m)C(s)C(n)im]Br-2, m+n=24, m=12, 14, 16, 18; s=2, 4, 6) were synthesized and characterized by H-1 NMR and ESI-MS spectroscopy. Their adsorption and thermodynamic properties were investigated by the surface tension and electrical conductivity methods. Consequently, the surface activity parameters (cmc, (cmc), (cmc), pC(20), cmc/C-20, (max), A(min)) and thermodynamic parameters (G(m), H-m, S-m) were obtained. The effects of the dissymmetry (m/n) and the spacer length (s) on the surface activity and micellization process of surfactants have been discussed in detail.

• 出版日期2017
• 单位南京理工大学