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Syntheses and Characterization of Some Cationic Surfactants
Author(s) -
Shehata H. A.,
Elwahab A. A. Abd,
Hafiz A. A.,
Aiad I.,
Hegazy M. A.
Publication year - 2008
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/s11743-008-1064-8
Subject(s) - chemistry , micelle , cationic polymerization , thermodynamics of micellization , critical micelle concentration , enthalpy , alkyl , standard molar entropy , hydrocarbon , conductivity , amine gas treating , standard enthalpy of formation , halide , inorganic chemistry , organic chemistry , thermodynamics , aqueous solution , physics
A series of novel cationic surfactants were synthesized from the quaternization of triethyl amine and various long chain alkyl halide. The chemical structure of the prepared compounds was confirmed using elemental analysis, FTIR and 1 H‐NMR spectra. The physical properties of the synthesized surfactants including, electrical conductivity, critical micelle concentration, (CMC) and the degree of ionization of the micelle, (β) were studied. The thermodynamic parameters of micelle formation, standard free energy Δ G m °, enthalpy Δ H m °, and entropy Δ S m ° were calculated. The results of the surface parameter determination were correlated with their chemical structures. It was found that the hydrocarbon chain length is the main factor which has an effect on the value of the thermodynamic parameters.