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Properties of a Binary System Containing Anionic and Cationic Gemini Surfactants
Author(s) -
Xu Hujun,
Liu Benna,
Kang Peng,
Bao Xinyan
Publication year - 2015
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-014-1655-5
Subject(s) - chemistry , pulmonary surfactant , micelle , cationic polymerization , critical micelle concentration , surface tension , aggregation number , mole fraction , hydrodynamic radius , thermodynamics of micellization , dynamic light scattering , binary system , analytical chemistry (journal) , chromatography , polymer chemistry , chemical engineering , aqueous solution , thermodynamics , binary number , arithmetic , mathematics , biochemistry , physics , nanoparticle , engineering
Surface tension, fluorescence, and dynamic light scattering were used to investigate the properties of a binary surfactant system comprising an anionic gemini surfactant (DLMC) and cationic gemini surfactant (II‐12‐EO 2 ). Surface tension measurements afforded the critical micelle concentration (cmc) of the mixture and the values are all lower than those of pure constituent surfactants. For the mixtures of II‐12‐EO 2 /DLMC, the micelle aggregation number decreases with the increase of II‐12‐EO 2 , and the micropolarity of the micelle is lowest when the molar fraction of II‐12‐EO 2 is 0.5; the hydrodynamic radius ( R h ) of the mixed micelle first increases and then decreases with the addition of II‐12‐EO 2 , and larger micelles are obtained when the molar fraction of II‐12‐EO 2 is 0.5 or 0.7.
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