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- Title
Micellar Properties of Nonionic Surfactant Tween 40 in Water: Small-Angle X-Ray Scattering Study.
- Authors
Bešter-Rogač, Marija
- Abstract
The structural properties of a nonionic surfactant polyoxyethylenesorbitan monopalmitate (C62H122O26, commercial names Tween 40®, Polysorbate 40) in aqueous solutions in the temperature range between 15 and 45 °C have been studied by small-angle X-ray scattering (SAXS) technique. Low concentration experimental data were evaluated using the model free indirect Fourier transformation method (IFT), whereas at higher concentration a generalized indirect Fourier transformation method (GIFT) based on the simultaneous determination of intra- and interparticle scattering contributions was applied. It was found that in Tween 40® aqueous solutions globular micelles with maximum distance within one particle of about 9 nm and radii of the hydrophobic core between 2.1-2.4 nm are present. The concentration and the temperature do affect neither the size nor the shape of the micelles considerably, however the presence of the non-spherical and/or elongated aggregates at higher concentrations at all temperatures could be assumed.
- Subjects
SURFACE active agents; WATER; SMALL-angle X-ray scattering; TEMPERATURE; FOURIER transforms
- Publication
Acta Chimica Slovenica, 2007, Vol 54, Issue 3, p452
- ISSN
1318-0207
- Publication type
Article