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Surface and thermodynamic parameters of mixed N ‐dodecyl N ‐trimethylsilane ammonium chloride with isooctyl phenol ethoxylate
Author(s) -
Gad E. A. M.,
Omar A. M. A.,
Zaki M.
Publication year - 1999
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/s11743-999-0062-y
Subject(s) - chemistry , trimethylsilane , ammonium chloride , cationic polymerization , surface tension , chloride , inorganic chemistry , adsorption , phenol , aqueous solution , ammonium , pulmonary surfactant , organic chemistry , thermodynamics , biochemistry , physics
Isooctyl phenol ethoxylate was mixed with N ‐dodecyl‐ N ‐trimethylsilane ammonium chloride and N ‐hexadecyl‐ N ‐trimethylsilane ammonium chloride, respectively. The surface tensions of aqueous solutions of cationic‐nonionic mixtures were measured as a function of nonionic concentration at 35°C with constant cationic concentration. By using the Hutchinson method, the surface excess concentrations, surface mole fractions, and interaction parameters of binary surfactant mixtures were calculated. A synergistic effect for reducing surface tension was observed for adsorption at the surface at low concentrations of N ‐dodecyl‐ N ‐trimethylsilane ammonium chloride.