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Paper Information

Journal:   INTERNATIONAL JOURNAL OF INDUSTRIAL ENGINEERING AND PRODUCTION MANAGEMENT (IJIE) (INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE) (PERSIAN)   FALL 2001 , Volume 12 , Number 3; Page(s) 75 To 90.
 
Paper: 

THERMODYNAMICAL STUDY OF INTERACTION VETWEEN SURFACE ACTIVE SUBSTANT AND A MACROCYLIC LIGAND

 
 
Author(s):  ANBIA M., GHOLAMI HASAN, KARIMPOUR H.A.
 
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Abstract: 

A membrane electrode selective to hexadecylpyridinum (HDP+) was constructed and used to study the thermodynamics of micellization of HDP+ in the presence of varying concentration of dicyclohexyl - 18 - Crown - 6 (DCH 18-C-6)at various temperatures (28-49o C) in aqueous solution. The phase-separation model was used to evaluate the thermodynamic parameters (DGom, DHom and DSom)'The stoichiometry of (DCHI8-C-6) to the surfactant in the micellar structure was found to be 1:1, The presence of crown ether indicating an enthalpy-entropy compensation effect. The CMC value decreases considerably by increasing concentration of the crown ether, exhibit an synergism effect. The degree of counterion dissociation was found to increases with increasing temperature and amount of crown ether.

 
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