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Issue 9, 2000
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Effect of chain length in ethoxylated and sulfonate surfactants upon the limiting diffusion coefficients in water at 25.0°C

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Abstract

Limiting diffusion coefficients of ethoxylated surfactants of general formula CH3(CH2)p−1(OCH2CH2)qOH (CpEq) and sulfonate surfactants of formula CH3(CH2)p−1SO3 Na+(CpSO3Na) were measured at 25°C by the Taylor dispersion technique. The series C6Eq, with 0⩽q⩽5, was studied to evaluate the effect of the length of ethoxylic chain, (–OCH2CH2–)q, on the mobility of the surfactant, the series CpE5 with 0⩽p⩽8 was studied to evaluate the effect of the length of the hydrophobic group, (–CH2–)p. The series CpSO3Na was also studied to compare the experimental results with the intradiffusion coefficients obtained by the NMR-PGSE technique and with the data computed by the Nernst–Hartley equation.

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Publication details

The article was received on 01 Feb 2000, accepted on 16 Mar 2000 and first published on 07 Apr 2000


Article type: Paper
DOI: 10.1039/B000864H
Citation: Phys. Chem. Chem. Phys., 2000,2, 1961-1965
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    Effect of chain length in ethoxylated and sulfonate surfactants upon the limiting diffusion coefficients in water at 25.0°C

    O. Ortona, G. D'Errico, D. Ciccarelli and V. Vitagliano, Phys. Chem. Chem. Phys., 2000, 2, 1961
    DOI: 10.1039/B000864H

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