Monday, 25 June 2007 - 3:00 PM
Clayton 125
106

Myelin Formation during the Dissolution of Lamellar Phase

Louisa Reissig1, David Fairhurst2, Andrew Mount1, Michael E. Cates1, and Stefan U. Egelhaaf3. (1) University of Edinburgh, Edinburgh, United Kingdom, (2) Nottingham Trent University, Nottingham, United Kingdom, (3) Heinrich-Heine University, Duesseldorf, Germany

After contact with water, lamellar phases can show spectacular instabilities: multi-bilayer tubules, so-called myelins, grow from the Lalpha/water interface into the water. We study Myelin formation in aqueous solution of the non-ionic surfactant C12E3. We quantitatively investigate the growth of these myelins as well as changes in the lamellar phase using confocal and optical microscopy as well as direct obsevation. This provides detailed quantitative information on the dynamics of the myelin growth, the myelin size as well as the swelling and textural changes of the lamellar phase. The dependence of these parameters on surfactant concentration and sample size is investigated. Based on these observations a semi-quantitative model for myelin growth is proposed.