Phase behaviors of Gemini cationic surfactants/ n-butanol/water systems

• Published in: Fluid phase equilibria Vol. 287; no. 2; pp. 146 - 150
• Main Authors: Wei, Xilian, Fu, Shizhou, Yin, Baolin, Sang, Qing, Sun, Dezhi, Dou, Jiali, Wang, Zhongni, Chen, Lusheng
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.01.2010; Elsevier
• Subjects: 2H NMR; Cationic; Chains; Chemistry; Electrical conductivity; Exact sciences and technology; General and physical chemistry; Liquid crystals; Lyotropic liquid crystal; N,N-long chain alkyl-2-hydroxyl-N,N,N,N-tetramethyl diammonium dichloride; Phase diagram; Phase diagrams; Phase equilibria; Small angular X-ray scattering (SAXS); Surface layer; Surfactants; Ternary systems; Texture; N,N-long chain alkyl-2-hydroxyl-N,N,N,N-tetramethyl diammonium dichloride; 2H NMR; Phase diagram; Lyotropic liquid crystal; Small angular X-ray scattering (SAXS); Water; Lyotropic liquid crystals; Organic cation; Ternary system; Electrical properties; N , N-long chain alkyl-2-hydroxyl-N,N,N,N-tetramethyl diammonium dichloride; Long chain; Ionic conductivity; Cationic surfactant; Alcohol; NMR spectrometry; Surfactant; Small angle X ray scattering; Quaternary ammonium compound; Organic free radical; Butanol; Dimer; Phase equilibrium; H NMR
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/j.fluid.2009.10.004

Phase diagrams for ternary system of the Gemini cationic surfactants, N,N-long chain alkyl-2-hydroxyl-N,N,N,N-tetramethyl diammonium dichloride (G n Cl 2) with butanol and water have been drawn based on experimental data at 25 °C. The phase diagrams show that L phase and different liquid crystalline phases are existent in the ternary system at different components. Electric conductivity of the L phase has been studied. Small-angle X-ray scattering (SAXS), 2H (deuterium) quadrupolar splitting ( 2H NMR) and the polarizing-light microscope were employed to confirm the characteristic texture structures and the microstructure of three different liquid crystalline phases.