Structure and dynamics of micelles and cubic phase structures with ethoxylated phytosterol surfactant in water
Journal article, 2008

The self-assembly of a sterol ethoxylate surfactant with 30 oxyethylene units in water was studied by 1 H NMR self-diffusion measurements in a wide concentration range in the micellar region (0-25 wt %). The data showed that the surfactant aggregates do not interact by hard sphere interactions but rather a strong concentration dependence of the diffusion coefficient was noted which was explained by polymer scaling theory. In the cubic phase (30-65 wt %), the self-diffusion data from water, from surfactant, and from free polyoxyethylene suggest spherical micelles, although water diffusion was much restricted due to binding to the surfactant headgroup. From X-ray measurements in the cubic phase, the unit cell size was calculated, and together with surfactant self-diffusion measurements the exchange dynamics between free and aggregated surfactant was obtained. © 2008 American Chemical Society.

Author

B. M. Folmer

Nestle S.A.

Magnus Nydén

SuMo Biomaterials

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Langmuir

07437463 (ISSN) 15205827 (eISSN)

Vol. 24 13 6441-6446

Subject Categories

Physical Chemistry

DOI

10.1021/la703758p

More information

Created

10/8/2017