Regensburg 2013 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Poster: Colloids and Complex Liquids

CPP 20.8: Poster

Tuesday, March 12, 2013, 18:15–20:15, Poster C

The Effect of Different Polymer Length on Water Droplets of Reverse AOT microemulsion — •Masoud Amirkhani¹, Soheil Sharifi¹, Sérgio Funari², and Othmar Marti¹ — ¹Institut für Experimentelle Physik, Universität Ulm, Albert-Einstein-Allee 11 89081 Ulm — ²HASYLAB, Notkestrasse 85, D-22607 Hamburg, Germany

We study the effect of polyethylene glycol (PEG) on the dynamic and structure of the reverse AOT microemulsion. The mixture of water and oil with anionic surfactant AOT (sodium bis-(2-ethylhexyl) sulfosuccinate) can form microemulsion. The dynamic of microemulsion in the presence of PEG is investigated by photon correlation spectroscopy technique. We mainly focus on the variation of the translational diffusion behavior as a function of the polymer concentration and polymer length scale. By increasing the content of the lowest PEG length scale (Mn=285) the dynamic of microemulsion slows down. In addition, one relaxation process is distinguished for all polymer concentration. However, for the two higher polymer length scale (Mn=2200 and 6000) two relaxations are observed and the dynamic of microemulsion speed up. We used the small angle X-ray scattering technique to monitor the size and the polydispersity of the mixture system (AOT-microemulsion/PEG).