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Surface dilational properties of mixed sodium dodecyl sulfate/dodecanol solutions
Max-Planck-Institute.
Max-Planck-Institute.
Max-Planck-Institute.
2003 (English)In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 221, no 1-3, p. 185-195Article in journal (Refereed) Published
Abstract [en]

The surface dilatational properties of aqueous solutions of sodium dodecyl sulfate (SDS) and n-dodecanol areinvestigated in the frequency range 15/f5/500 Hz using the oscillating bubble method. The results demonstrate that apure dodecanol solution has an elastic surface without viscous effect whereas the surface of a SDS solution withoutadded dodecanol exhibits a strong viscoelastic behavior. Mixtures show graduated properties. The time behavior oftheir surface dilatational moduli demonstrates that dodecanol molecules drive the SDS molecules slowly out of thesurface. Therefore, the known one-component model describing the surface dilatational modulus can be used also forthese mixtures. A simple theoretical consideration explains this effect.

Place, publisher, year, edition, pages
2003. Vol. 221, no 1-3, p. 185-195
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:miun:diva-16149DOI: 10.1016/S0927-7757(03)00135-3OAI: oai:DiVA.org:miun-16149DiVA, id: diva2:524195
Available from: 2012-05-24 Created: 2012-04-29 Last updated: 2017-12-07Bibliographically approved

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Örtegren, Jonas

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