Solubilization of pentanol by micelles of cationic surfactants and binary mixtures of cationic surfactants in aqueous solution

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Langmuir; (United States)

DOI:https://doi.org/10.1021/la00019a024· OSTI ID:7015573

Morgan, M E; Uchiyama, Hirotaka; Christian, S D; Tucker, E E; Scamehorn, J F ^[1]

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1. Univ. of Oklahoma, Norman, OK (United States)

The solubilization of pentanol in aqueous solutions of individual cationic surfactants and binary mixtures of cationic surfactants at 20[degree]C has been investigated using head-space chromatography. Complete solubilization isotherms have been determined for pentanol in micelles of the surfactants hexadecyl-pyridinium chloride (CPC), trimethyltetradecylammonium chloride (C[sub 14]Cl), benzyldimethyltetradecyl-ammonium chloride (C[sub 14]BzCl), benzyldimethylhexadecylammonium chloride (C[sub 16]BzCl), and hexadecyltrimethylammonium bromide (C[sub 16]Cl). In every case, a large decrease in the solubilization equilibrium (or partition) constant occurs on increasing the mole fraction of pentanol in the micelles (X); a factor of 3-5 reduction in the equilibrium constant occurs as X increases from nearly zero to nearly 0.9. Solubilization results have also been determined for mixed micelles of C[sub 14]Cl and C[sub 14]BzCl (system I) and CPC and C[sub 16]BzCl (system II). Large positive synergistic effects reported previously for system I and large antisynergistic effects for system II are not confirmed by the results of the present studies. For both of these mixed micellar systems, small decreases in the value of the solubilization equilibrium constant, relative to values predicted with an assumed additivity relationship, are observed. 38 refs., 10 figs., 1 tab.

• DOE Contract Number: FG05-87ER13678
• OSTI ID: 7015573
• Journal Information: Langmuir; (United States), Journal Name: Langmuir; (United States) Vol. 10:7; ISSN LANGD5; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400100 -- Analytical & Separations Chemistry
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
AMINES
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
AZINES
BINARY MIXTURES
BROMIDES
BROMINE COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
CHROMATOGRAPHY
DISPERSIONS
DISSOLUTION
GAS CHROMATOGRAPHY
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
MICELLAR SYSTEMS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PENTANOLS
PYRIDINES
PYRIDINIUM COMPOUNDS
QUATERNARY COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
SURFACTANTS
SYNERGISM