Journal
COLLOID AND POLYMER SCIENCE
Volume 287, Issue 4, Pages 395-402Publisher
SPRINGER
DOI: 10.1007/s00396-008-1976-x
Keywords
Ionic liquid-type gemini imidazolium surfactant; Spacer length; Adsorption efficiency; Thermodynamics of micellization; Micropolarity
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Funding
- Natural Science Foundation of Shandong Province, China [Y2007B32]
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The aggregation behavior and thermodynamic properties of micellization for the ionic liquid-type gemini imidazolium surfactants with different spacer length ([C-12 - s-C(12)im]Br-2, s = 2, 4, 6) have been investigated by means of surface tension, electrical conductivity, dynamic light scattering and fluorescence measurements. The values of cmc, gamma(cmc), Gamma(max), A(min), pi(cmc), pc(20) and cmc/pc(20) suggest that the shorter the spacer, the higher the surface activity of [C-12-s-C(12)im]Br-2 is. The cmc and gamma(cmc) values are decreased significantly in the presence of sodium halides, and the values decrease in the order NaCl
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