Solubilization of n-alkylbenzenes in aggregates of sodium dodecyl sulfate and a cationic polymer of high charge density (II)

Langmuir : the ACS Journal of Surfaces and Colloids
Jungno Lee, Yoshikiyo Moroi

Abstract

The solubilization property of the aggregate composed of sodium dodecyl sulfate (SDS) and a cationic polymer (polydiallyldimethylammonium chloride, PDADMAC) was investigated. From the binding isotherm, the increasing free SDS concentration (Cf) above the critical aggregation concentration (cac) was clearly confirmed and used to calculate the Gibbs free energy change of solubilization. The maximum additive concentration of the alkylbenzene solubilizates remained almost constant around their aqueous solubilities below the cac and then increased with increasing SDS concentration above the cac and with decreasing alkyl chain length of the solubilizates. Also, their solubility increased with increasing temperature over the concentration range of the surfactant examined. Because the monomeric DS- concentration in the aqueous phase (Cf) increased with the SDS concentration above the cac in the SDS/PDADMAC system, Cf was evaluated from the binding isotherm to calculate the change in the Gibbs energies of transfer of the solubilizates using the phase separation model. The Gibbs energy change for the solubilizates decreased with increasing temperature and increasing alkyl chain length. The decrease in the Gibbs energy per CH2 group (Delt...Continue Reading

References

Feb 19, 1998·Journal of Colloid and Interface Science·M Take'uchi, Y Moroi
Mar 26, 2003·Journal of Colloid and Interface Science·Yoshikiyo Moroi, Hiromi Sugioka
Nov 13, 2003·Journal of Colloid and Interface Science·A F Olea, C Gamboa
Dec 4, 2003·Journal of Controlled Release : Official Journal of the Controlled Release Society·Rafael Barreiro-IglesiasAngel Concheiro
Apr 15, 2004·Journal of Colloid and Interface Science·Jungno Lee, Yoshikiyo Moroi
Jun 23, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Jungno Lee, Yoshikiyo Moroi

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Citations

Jan 11, 2014·Journal of Colloid and Interface Science·Hui ZhangJochen Weiss
Feb 8, 2008·Journal of Colloid and Interface Science·Gilat NizriShlomo Magdassi
Sep 24, 2015·Journal of Colloid and Interface Science·Hui ZhangJochen Weiss
Nov 7, 2019·Critical Reviews in Analytical Chemistry·Marija JozanovićMartina Medvidović-Kosanović
May 8, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Hiromichi NakaharaOsamu Shibata

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