Lyophilic properties of surfactant-rich phases of polyethoxylated alkylphenols formed at cloud point temperature

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Lyophilic properties of surfactant-rich phases of polyethoxylated alkylphenols formed at cloud point temperature
Engineering Village 2
2006 Elsevier Inc
Accession number: 06229906727

Title: Lyophilic properties of surfactant-rich phases of polyethoxylated alkylphenols formed at cloud point temperature

Authors: Doroschuk, Volodymyr O.; Lelyushok, Sergey O.; Rakhilchuk, Olga O.; Kulichenko, Sergey A.

Author affiliation: Analytical Chemistry Department, Faculty of Chemistry, Taras Shevchenko Kyiv University, Kyiv, 01033, Ukraine

Serial title: Journal of Colloid and Interface Science

Abbreviated serial title: J. Colloid Interface Sci.

Volume: v 299

Issue: n 1

Issue date: Jul 1 2006

Publication year: 2006

Pages: p 403-409

Language: English

ISSN: 0021-9797

CODEN: JCISA5

Document type: Journal article (JA)

Publisher: Academic Press Inc., Orlando, FL 32887-4900, United States

Abstract: The influence of the concentration conditions, solutions acidity, and electrolyte additions on the lyophilic properties of the surfactant-rich phases of polyethoxylated alkylphenols OP-7 and OP-10 formed at cloud point temperature were studied. The lyophilic properties of surfactant-rich phases were determined by estimating of their effective hydration values and solvation free energy of methylene and carboxyl groups at cloud point extraction of aliphatic monocarboxylic acids. It was shown that the surfactant-rich phases formed from the dilute surfactant solutions have more hydrophobic properties than the phases formed from the high concentrated solutions. The possibility of changing the lyophilic properties of surfactant-rich phases by electrolyte additions was shown: complex formation between electrolyte cation and the polyoxyethylene chain of the surfactant increases the hydrophilic properties of the surfactant-rich phases. Calculations of the solvation free energy of methylene and carboxylic fragments of the aliphatic carboxylic acids at micellar extraction showed the uniqueness of the surfactant-rich phases which are able to energetically advantageously extract both hydrophilic and hydrophobic molecules of substrates. ? 2006 Elsevier Inc. All rights reserved.

Number of references: 23

Ei main heading: Phenols

Ei controlled terms: Surface active agents - Acidity - Electrolytes - Hydration - Hydrophilicity - Hydrophobicity

Uncontrolled terms: Cloud point extraction - Non-ionic surfactants - Lyophilic properties

Ei classification codes: 804.1 Organic Compounds - 803 Chemical Agents and Basic Industrial Chemicals - 801.1 Chemistry, General - 702 Electric Batteries and Fuel Cells - 802.2 Chemical Reactions - 931.2 Physical Properties of Gases, Liquids & Solids

Treatment: Experimental (EXP)

DOI: 10.1016/j.jcis.2006.02.002

Database: Compendex

Compilation and indexing terms, ? 2006 Elsevier Inc. All rights reserved
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