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Mixed Micellization of Polyoxyethylene (20) Oleyl Ether with Cetylpyridinium Chloride at the Air–Water Interface
Author(s) -
Desai Shobha,
Bhagwat Sunil S.
Publication year - 2016
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/s11743-016-1874-z
Subject(s) - chemistry , cetylpyridinium chloride , pulmonary surfactant , mole fraction , micelle , chloride , ether , thermodynamics , flory–huggins solution theory , chromatography , analytical chemistry (journal) , organic chemistry , aqueous solution , biochemistry , physics , polymer
Adsorption and micellization behaviour of binary surfactant mixtures containing a nonionic surfactant, polyoxyethylene (20) oleyl ether (C 18‐1 E 20 ), and a cationic surfactant, cetylpyridinium chloride (CPC), was studied at the air–water interface using the Wilhelmy plate method. A pseudo‐phase separation model was used to analyse mixed micellization. A Margules equation with one constant (interaction parameter, β ) was fitted to the nonideal behaviour of the mixed surfactant system. This system shows synergism ( β = −6.0) for micellization. The dynamic behaviour and foamability of binary mixtures at the same bulk concentration and at different mole fractions were also studied using drop volume and horizontal impinging jet methods, respectively. It was found that with an increase in the mole fraction of C 18‐1 E 20 , the foamability of a mixture increases and t * value decreases.