Open AccessMixed Micelle Formation and Co-adsorption of Anionic/Non-ionic Surfactant Mixtures on Rutile
Author(s) -
Ajay K. Vanjara,
Swati Dixit
Publication year - 1996
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/026361749601300507
Subject(s) - pulmonary surfactant , micelle , adsorption , chemistry , critical micelle concentration , surface tension , aggregation number , thermodynamics of micellization , zeta potential , ionic bonding , chemical engineering , inorganic chemistry , organic chemistry , aqueous solution , ion , nanoparticle , biochemistry , physics , quantum mechanics , engineering
Mixed micelle formation between the anionic surfactant p-dodecyl benzene sulphonate and the non-ionic surfactants Brij-58, Brij-78 and Brij-99, having the same number of oxyethylene units but a varying number of hydrophobic groups, has been studied using surface tension and NMR spectroscopic measurements. Both hydrophobic–hydrophobic and hydrophilic–hydrophilic interactions play an important role in mixed micelle formation leading to greater non-ideality. The effect of mixed micelle interactions on the adsorption of these surfactants from their mixtures on rutile have been investigated using adsorption and zeta potential measurements. Adsorption above the CMC level is dictated by the relatively higher tendency of mixed micellization over mixed aggregation at the solid/liquid interface.