Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 64620
Title Adsorption of nonionic surfactants onto polystyrene : kinetics and reversibility
Author(s) Geffroy, C.; Cohen Stuart, M.A.; Wong, K.; Cabane, B.; Bergeron, V.
Source Langmuir 16 (2000). - ISSN 0743-7463 - p. 6422 - 6430.
DOI https://doi.org/10.1021/la0000769
Department(s) Physical Chemistry and Colloid Science
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2000
Abstract The reversible adsorption and desorption kinetics of nonionic surfactants at a hydrophobic surface have been studied by reflectometry. This enables the measurement of the adsorption isotherm with unprecedented accuracy. It is shown that the adsorption mechanism can be split into three processes. The surface is first covered by single monomers that experience a strong hydrophobic interaction. This is followed by a typically cooperative process leading to the formation of surface aggregates. At the saturation level, the surfactant molecules stagger in the interface such that there is a possible overlap of hydrophilic headgroups with hydrophobic tails. All this information comes directly out of the kinetics that can be modeled in terms of a local equilibrium.
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